label and decompile more of field_weather_2

3 files changed, 645 insertions, 504 deletions

diff --git a/src/field/field_weather.c b/src/field/field_weather.c
index 2d4711b81..edb186b95 100644
--- a/src/field/field_weather.c
+++ b/src/field/field_weather.c
@@ -28,10 +28,10 @@ struct WeatherPaletteData
 
 struct WeatherCallbacks
 {
-    void (*func0)(void);
-    void (*func1)(void);
-    void (*func2)(void);
-    u8 (*func3)(void);
+    void (*initVars)(void);
+    void (*main)(void);
+    void (*initAll)(void);
+    u8 (*finish)(void);
 };
 
 extern struct Weather gWeather;
@@ -48,7 +48,7 @@ const u8 DroughtPaletteData_5[] = INCBIN_U8("graphics/weather/drought5.bin.lz");
 extern u8 (*gUnknown_0202FC48)[32];
 extern u8 gUnknown_0202F9E8[32];
 
-const u8 *const gUnknown_08396FA8[] =
+static const u8 *const sCompressedDroughtPalettes[] =
 {
     DroughtPaletteData_0,
     DroughtPaletteData_1,
@@ -65,34 +65,34 @@ const u8 *const gUnknown_08396FA8[] =
 // this file produces the same result as accessing gWeather directly.
 struct Weather *const gWeatherPtr = &gWeather;
 
-void sub_807CAE8(void);
-void nullsub_38(void);
-u8 sub_807CB0C(void);
-void sub_807DE78(void);
-void sub_807DEF4(void);
-void sub_807DEC4(void);
-u8 sub_807DF54(void);
+void None_Init(void);
+void None_Main(void);
+u8 None_Finish(void);
+void Clouds_InitVars(void);
+void Clouds_Main(void);
+void Clouds_InitAll(void);
+u8 Clouds_Finish(void);
 void sub_807DF9C(void);
 void nullsub_55(void);
 void sub_807DFC0(void);
 u8 sub_807DFD0(void);
 void LightRain_InitVars(void);
-void sub_807E400(void);
-void sub_807E3D0(void);
-u8 sub_807E460(void);
+void LightRain_Main(void);
+void LightRain_InitAll(void);
+u8 LightRain_Finish(void);
 void Snow_InitVars(void);
-void snowflakes_progress2(void);
-void sub_807EA18(void);
-u8 sub_807EAC0(void);
-void sub_807EE80(void);
-void sub_807EFC0(void);
-void sub_807EEF4(void);
-u8 sub_807F34C(void);
-void sub_807F49C(void);
-void sub_807F52C(void);
-void sub_807F4FC(void);
-u8 sub_807F5EC(void);
-void sub_807F7F8(void);
+void Snow_Main(void);
+void Snow_InitAll(void);
+u8 Snow_Finish(void);
+void MedRain_InitVars(void);
+void Rain_Main(void);
+void MedRain_InitAll(void);
+u8 Rain_Finish(void);
+void Fog2_InitVars(void);
+void Fog2_Main(void);
+void Fog2_InitAll(void);
+u8 Fog2_Finish(void);
+void Fog1_InitVars(void);
 void sub_807F888(void);
 void sub_807F858(void);
 u8 sub_807F934(void);
@@ -104,10 +104,10 @@ void sub_807FB24(void);
 void sub_807FBD8(void);
 void sub_807FBA8(void);
 u8 sub_807FC3C(void);
-void sub_807F49C(void);
-void sub_807F52C(void);
-void sub_807F4FC(void);
-u8 sub_807F5EC(void);
+void Fog2_InitVars(void);
+void Fog2_Main(void);
+void Fog2_InitAll(void);
+u8 Fog2_Finish(void);
 void sub_8080430(void);
 void nullsub_56(void);
 void sub_8080460(void);
@@ -116,32 +116,32 @@ void sub_807E110(void);
 void sub_807E174(void);
 void sub_807E144(void);
 u8 sub_807E258(void);
-void sub_807EF24(void);
-void sub_807EFC0(void);
-void sub_807EF90(void);
-u8 sub_807F34C(void);
+void HeavyRain_InitVars(void);
+void Rain_Main(void);
+void HeavyRain_InitAll(void);
+u8 Rain_Finish(void);
 void sub_8080474(void);
 void sub_80804F8(void);
 void sub_80804C8(void);
 u8 sub_808056C(void);
 
-const struct WeatherCallbacks gUnknown_08396FC8[] =
+static const struct WeatherCallbacks sWeatherFuncs[] =
 {
-    {sub_807CAE8, nullsub_38, sub_807CAE8, sub_807CB0C},
-    {sub_807DE78, sub_807DEF4, sub_807DEC4, sub_807DF54},
-    {sub_807DF9C, nullsub_55, sub_807DFC0, sub_807DFD0},
-    {LightRain_InitVars, sub_807E400, sub_807E3D0, sub_807E460},           // light rain
-    {Snow_InitVars, snowflakes_progress2, sub_807EA18, sub_807EAC0},  // snow
-    {sub_807EE80, sub_807EFC0, sub_807EEF4, sub_807F34C},
-    {sub_807F49C, sub_807F52C, sub_807F4FC, sub_807F5EC},
-    {sub_807F7F8, sub_807F888, sub_807F858, sub_807F934},
-    {sub_807FE9C, sub_807FF4C, sub_807FF1C, sub_807FFC8},
-    {sub_807FB24, sub_807FBD8, sub_807FBA8, sub_807FC3C},
-    {sub_807F49C, sub_807F52C, sub_807F4FC, sub_807F5EC},
-    {sub_8080430, nullsub_56, sub_8080460, sub_8080470},
-    {sub_807E110, sub_807E174, sub_807E144, sub_807E258},
-    {sub_807EF24, sub_807EFC0, sub_807EF90, sub_807F34C},
-    {sub_8080474, sub_80804F8, sub_80804C8, sub_808056C},
+    {None_Init,          None_Main,      None_Init,         None_Finish},
+    {Clouds_InitVars,    Clouds_Main,    Clouds_InitAll,    Clouds_Finish},
+    {sub_807DF9C,        nullsub_55,     sub_807DFC0,       sub_807DFD0},
+    {LightRain_InitVars, LightRain_Main, LightRain_InitAll, LightRain_Finish},           // light rain
+    {Snow_InitVars,      Snow_Main,      Snow_InitAll,      Snow_Finish},  // snow
+    {MedRain_InitVars,   Rain_Main,      MedRain_InitAll,   Rain_Finish},
+    {Fog2_InitVars,      Fog2_Main,      Fog2_InitAll,      Fog2_Finish},
+    {Fog1_InitVars,      sub_807F888,    sub_807F858,       sub_807F934},       // fog 1
+    {sub_807FE9C,        sub_807FF4C,    sub_807FF1C,       sub_807FFC8},
+    {sub_807FB24,        sub_807FBD8,    sub_807FBA8,       sub_807FC3C},
+    {Fog2_InitVars,      Fog2_Main,      Fog2_InitAll,      Fog2_Finish},
+    {sub_8080430,        nullsub_56,     sub_8080460,       sub_8080470},
+    {sub_807E110,        sub_807E174,    sub_807E144,       sub_807E258},
+    {HeavyRain_InitVars, Rain_Main,      HeavyRain_InitAll, Rain_Finish},
+    {sub_8080474,        sub_80804F8,    sub_80804C8,       sub_808056C},
 };
 
 void (*const gUnknown_083970B8[])(void) =
@@ -190,10 +190,10 @@ const u8 gUnknown_083970C8[] =
 
 const u16 gUnknown_083970E8[] = INCBIN_U16("graphics/weather/0.gbapal");
 
-void sub_807C828(void)
+void StartWeather(void)
 {
     u8 index;
-    if (!FuncIsActiveTask(sub_807CA34))
+    if (!FuncIsActiveTask(Task_WeatherMain))
     {
         index = AllocSpritePalette(0x1200);
         CpuCopy32(gUnknown_083970E8, &gPlttBufferUnfaded[0x100 + index * 16], 32);
@@ -202,8 +202,8 @@ void sub_807C828(void)
         gWeatherPtr->unknown_6D4 = AllocSpritePalette(0x1201);
         gWeatherPtr->unknown_6DA = 0;
         gWeatherPtr->unknown_6D8 = 0;
-        gWeatherPtr->unknown_6DE = 0;
-        gWeatherPtr->unknown_6E4 = 0;
+        gWeatherPtr->cloudsActive = 0;
+        gWeatherPtr->snowflakeSpriteCount = 0;
         gWeatherPtr->unknown_700 = 0;
         gWeatherPtr->unknown_6FB = 0;
         gWeatherPtr->unknown_724 = 0;
@@ -211,12 +211,12 @@ void sub_807C828(void)
         gWeatherPtr->unknown_717 = 0;
         gWeatherPtr->unknown_72E = 0;
         gWeatherPtr->unknown_6FA = 0;
-        sub_807DB64(16, 0);
+        Weather_SetBlendCoeffs(16, 0);
         gWeatherPtr->currWeather = 0;
         gWeatherPtr->unknown_6C6 = 3;
         gWeatherPtr->unknown_6C8 = 0;
         gWeatherPtr->unknown_6D3 = 1;
-        gWeatherPtr->unknown_6C9 = CreateTask(sub_807C9E4, 80);
+        gWeatherPtr->unknown_6C9 = CreateTask(Task_WeatherInit, 80);
     }
 }
 
@@ -226,12 +226,12 @@ void DoWeatherEffect(u8 effect)
     {
         PlayRainSoundEffect();
     }
-    if (gWeatherPtr->unknown_6D1 != effect && gWeatherPtr->currWeather == effect)
+    if (gWeatherPtr->nextWeather != effect && gWeatherPtr->currWeather == effect)
     {
-        gUnknown_08396FC8[effect].func0();
+        sWeatherFuncs[effect].initVars();
     }
     gWeatherPtr->unknown_6D3 = 0;
-    gWeatherPtr->unknown_6D1 = effect;
+    gWeatherPtr->nextWeather = effect;
     gWeatherPtr->unknown_6CE = 0;
 }
 
@@ -239,59 +239,57 @@ void sub_807C988(u8 effect)
 {
     PlayRainSoundEffect();
     gWeatherPtr->currWeather = effect;
-    gWeatherPtr->unknown_6D1 = effect;
+    gWeatherPtr->nextWeather = effect;
 }
 
 void sub_807C9B4(u8 effect)
 {
     PlayRainSoundEffect();
     gWeatherPtr->currWeather = effect;
-    gWeatherPtr->unknown_6D1 = effect;
+    gWeatherPtr->nextWeather = effect;
     gWeatherPtr->unknown_6C8 = 1;
 }
 
-void sub_807C9E4(u8 taskId)
+void Task_WeatherInit(u8 taskId)
 {
     if (gWeatherPtr->unknown_6C8)
     {
-        gUnknown_08396FC8[gWeatherPtr->currWeather].func2();
-        gTasks[taskId].func = sub_807CA34;
+        sWeatherFuncs[gWeatherPtr->currWeather].initAll();
+        gTasks[taskId].func = Task_WeatherMain;
     }
 }
 
-void sub_807CA34(u8 task)
+void Task_WeatherMain(u8 taskId)
 {
-    u8 v1;
-    if (gWeatherPtr->currWeather != gWeatherPtr->unknown_6D1)
+    if (gWeatherPtr->currWeather != gWeatherPtr->nextWeather)
     {
-        v1 = gUnknown_08396FC8[gWeatherPtr->currWeather].func3();
-        if (!v1)
+        if (!sWeatherFuncs[gWeatherPtr->currWeather].finish())
         {
-            gUnknown_08396FC8[gWeatherPtr->unknown_6D1].func0();
-            gWeatherPtr->unknown_6C3 = 0; // compiler reuses v1
-            gWeatherPtr->unknown_6C6 = 0; // compiler reuses v1
-            gWeatherPtr->currWeather = gWeatherPtr->unknown_6D1;
+            sWeatherFuncs[gWeatherPtr->nextWeather].initVars();
+            gWeatherPtr->unknown_6C3 = 0;
+            gWeatherPtr->unknown_6C6 = 0;
+            gWeatherPtr->currWeather = gWeatherPtr->nextWeather;
             gWeatherPtr->unknown_6D3 = 1;
         }
     }
     else
     {
-        gUnknown_08396FC8[gWeatherPtr->currWeather].func1();
+        sWeatherFuncs[gWeatherPtr->currWeather].main();
     }
     gUnknown_083970B8[gWeatherPtr->unknown_6C6]();
 }
 
-void sub_807CAE8(void)
+void None_Init(void)
 {
     gWeatherPtr->unknown_6C1 = 0;
     gWeatherPtr->unknown_6C2 = 0;
 }
 
-void nullsub_38(void)
+void None_Main(void)
 {
 }
 
-u8 sub_807CB0C(void)
+u8 None_Finish(void)
 {
     return 0;
 }
@@ -627,14 +625,14 @@ void sub_807D1BC(u8 a1, u8 a2, s8 c, u8 d, u16 e)
     }
 }
 
-void sub_807D304(s8 a, u8 arg2, u16 c)
+void sub_807D304(s8 a, u8 coeff, u16 c)
 {
     struct RGBColor color;
     u8 r_;
     u8 g_;
     u8 b_;
     u16 r4;
-    u16 r5;
+    u16 palOffset;
     u16 r12;
 
     a = -a - 1;
@@ -642,13 +640,13 @@ void sub_807D304(s8 a, u8 arg2, u16 c)
     r_ = color.r;
     g_ = color.g;
     b_ = color.b;
-    r5 = 0;
+    palOffset = 0;
     for (r4 = 0; r4 < 32; r4++)
     {
         if (gUnknown_030006DC[r4] == 0)
         {
-            BlendPalette(r5, 16, arg2, c);
-            r5 += 16;
+            BlendPalette(palOffset, 16, coeff, c);
+            palOffset += 16;
         }
         else
         {
@@ -660,7 +658,7 @@ void sub_807D304(s8 a, u8 arg2, u16 c)
                 u8 r1, g1, b1;
                 u8 r2, g2, b2;
 
-                color1 = *(struct RGBColor *)&gPlttBufferUnfaded[r5];
+                color1 = *(struct RGBColor *)&gPlttBufferUnfaded[palOffset];
                 r1 = color1.r;
                 g1 = color1.g;
                 b1 = color1.b;
@@ -671,11 +669,11 @@ void sub_807D304(s8 a, u8 arg2, u16 c)
                 g2 = color2.g;
                 b2 = color2.b;
 
-                r2 += ((r_ - r2) * arg2) >> 4;
-                g2 += ((g_ - g2) * arg2) >> 4;
-                b2 += ((b_ - b2) * arg2) >> 4;
+                r2 += ((r_ - r2) * coeff) >> 4;
+                g2 += ((g_ - g2) * coeff) >> 4;
+                b2 += ((b_ - b2) * coeff) >> 4;
 
-                gPlttBufferFaded[r5++] = (b2 << 10) | (g2 << 5) | r2;
+                gPlttBufferFaded[palOffset++] = (b2 << 10) | (g2 << 5) | r2;
             }
         }
     }
@@ -775,28 +773,28 @@ void sub_807D5F0(u8 a, u8 b, u8 c)
     }
 }
 
-void fade_screen(u8 a, u8 b)
+void fade_screen(u8 a, u8 delay)
 {
-    u32 r4;
+    u32 fadeColor;
     u32 r1;
     u32 r2;
 
     switch (a)
     {
     case 0:
-        r4 = 0;
+        fadeColor = 0;
         r1 = 0;
         break;
     case 2:
-        r4 = 0xFFFF;
+        fadeColor = 0xFFFF;
         r1 = 0;
         break;
     case 1:
-        r4 = 0;
+        fadeColor = 0;
         r1 = 1;
         break;
     case 3:
-        r4 = 0xFFFF;
+        fadeColor = 0xFFFF;
         r1 = 1;
         break;
     default:
@@ -823,20 +821,20 @@ void fade_screen(u8 a, u8 b)
     {
         if (r2 != 0)
             CpuFastCopy(gPlttBufferFaded, gPlttBufferUnfaded, 0x400);
-        BeginNormalPaletteFade(0xFFFFFFFF, b, 0, 16, r4);
+        BeginNormalPaletteFade(0xFFFFFFFF, delay, 0, 16, fadeColor);
         gWeatherPtr->unknown_6C6 = 2;
     }
     else
     {
-        gWeatherPtr->unknown_6C4 = r4;
+        gWeatherPtr->unknown_6C4 = fadeColor;
         if (r2 != 0)
             gWeatherPtr->unknown_6C7 = 0;
         else
-            BeginNormalPaletteFade(0xFFFFFFFF, b, 16, 0, r4);
+            BeginNormalPaletteFade(0xFFFFFFFF, delay, 16, 0, fadeColor);
         gWeatherPtr->unknown_6C6 = 1;
         gWeatherPtr->unknown_6CA = 1;
         gWeatherPtr->unknown_6CB = 0;
-        sub_807DB64(gWeatherPtr->unknown_730, gWeatherPtr->unknown_732);
+        Weather_SetBlendCoeffs(gWeatherPtr->currBlendEVA, gWeatherPtr->currBlendEVB);
         gWeatherPtr->unknown_6C8 = 1;
     }
 }
@@ -909,7 +907,7 @@ void sub_807D8F0(u8 *a, u8 *b)
     if (r4 < 7)
     {
         r4--;
-        LZ77UnCompWram(gUnknown_08396FA8[r4], eWeatherPaletteData.data[r4]);
+        LZ77UnCompWram(sCompressedDroughtPalettes[r4], eWeatherPaletteData.data[r4]);
         if (r4 == 0)
         {
             eWeatherPaletteData.data[r4][0] = 0x421;
@@ -921,8 +919,7 @@ void sub_807D8F0(u8 *a, u8 *b)
             for (i = 0; i < 0x1000; i++)
                 eWeatherPaletteData.data[r4][i] += eWeatherPaletteData.data[r4 - 1][i];
         }
-        (*a)++;
-        if (*a == 7)
+        if (++(*a) == 7)
         {
             *a = 32;
             *b = 32;
@@ -997,52 +994,58 @@ void sub_807DA4C(void)
     }
 }
 
-void sub_807DB64(u8 a, u8 b)
+void Weather_SetBlendCoeffs(u8 eva, u8 evb)
 {
-    gWeatherPtr->unknown_730 = a;
-    gWeatherPtr->unknown_732 = b;
-    gWeatherPtr->unknown_734 = a;
-    gWeatherPtr->unknown_736 = b;
-    REG_BLDALPHA = (b << 8) | a;
+    gWeatherPtr->currBlendEVA = eva;
+    gWeatherPtr->currBlendEVB = evb;
+    gWeatherPtr->targetBlendEVA = eva;
+    gWeatherPtr->targetBlendEVB = evb;
+    REG_BLDALPHA = BLDALPHA_BLEND(eva, evb);
 }
 
-void sub_807DBA4(u8 a, u8 b, int c)
+void Weather_SetTargetBlendCoeffs(u8 eva, u8 evb, int delay)
 {
-    gWeatherPtr->unknown_734 = a;
-    gWeatherPtr->unknown_736 = b;
-    gWeatherPtr->unknown_73A = c;
+    gWeatherPtr->targetBlendEVA = eva;
+    gWeatherPtr->targetBlendEVB = evb;
+    gWeatherPtr->blendDelay = delay;
     gWeatherPtr->unknown_739 = 0;
     gWeatherPtr->unknown_738 = 0;
 }
 
-bool8 sub_807DBE8(void)
+bool8 Weather_UpdateBlend(void)
 {
-    if (gWeatherPtr->unknown_730 == gWeatherPtr->unknown_734
-     && gWeatherPtr->unknown_732 == gWeatherPtr->unknown_736)
+    if (gWeatherPtr->currBlendEVA == gWeatherPtr->targetBlendEVA
+     && gWeatherPtr->currBlendEVB == gWeatherPtr->targetBlendEVB)
         return TRUE;
-    if (++gWeatherPtr->unknown_739 > gWeatherPtr->unknown_73A)
+
+    if (++gWeatherPtr->unknown_739 > gWeatherPtr->blendDelay)
     {
         gWeatherPtr->unknown_739 = 0;
         gWeatherPtr->unknown_738++;
+
+        // Update currBlendEVA and currBlendEVB on alternate frames
         if (gWeatherPtr->unknown_738 & 1)
         {
-            if (gWeatherPtr->unknown_730 < gWeatherPtr->unknown_734)
-                gWeatherPtr->unknown_730++;
-            else if (gWeatherPtr->unknown_730 > gWeatherPtr->unknown_734)
-                gWeatherPtr->unknown_730--;
+            if (gWeatherPtr->currBlendEVA < gWeatherPtr->targetBlendEVA)
+                gWeatherPtr->currBlendEVA++;
+            else if (gWeatherPtr->currBlendEVA > gWeatherPtr->targetBlendEVA)
+                gWeatherPtr->currBlendEVA--;
         }
         else
         {
-            if (gWeatherPtr->unknown_732 < gWeatherPtr->unknown_736)
-                gWeatherPtr->unknown_732++;
-            else if (gWeatherPtr->unknown_732 > gWeatherPtr->unknown_736)
-                gWeatherPtr->unknown_732--;
+            if (gWeatherPtr->currBlendEVB < gWeatherPtr->targetBlendEVB)
+                gWeatherPtr->currBlendEVB++;
+            else if (gWeatherPtr->currBlendEVB > gWeatherPtr->targetBlendEVB)
+                gWeatherPtr->currBlendEVB--;
         }
     }
-    REG_BLDALPHA = (gWeatherPtr->unknown_732 << 8) | gWeatherPtr->unknown_730;
-    if (gWeatherPtr->unknown_730 == gWeatherPtr->unknown_734
-     && gWeatherPtr->unknown_732 == gWeatherPtr->unknown_736)
+
+    REG_BLDALPHA = BLDALPHA_BLEND(gWeatherPtr->currBlendEVA, gWeatherPtr->currBlendEVB);
+
+    if (gWeatherPtr->currBlendEVA == gWeatherPtr->targetBlendEVA
+     && gWeatherPtr->currBlendEVB == gWeatherPtr->targetBlendEVB)
         return TRUE;
+
     return FALSE;
 }
 
diff --git a/src/field/field_weather_2.c b/src/field/field_weather_2.c
index fa97df459..d2ef34f6f 100644
--- a/src/field/field_weather_2.c
+++ b/src/field/field_weather_2.c
@@ -11,34 +11,28 @@
 
 extern struct Weather *const gWeatherPtr;
 
-//extern const s16 gUnknown_0839A9C8[][2];
-extern const struct SpriteSheet gWeatherCloudSpriteSheet;
-extern const struct SpriteTemplate gSpriteTemplate_839A9F0;
-extern const struct SpriteTemplate gSpriteTemplate_839AAA4;
-extern const struct SpriteTemplate gSpriteTemplate_839AB04;
-
 const u16 gUnknown_08397108[] = INCBIN_U16("graphics/weather/1.gbapal");
 const u16 gUnknown_08397128[] = INCBIN_U16("graphics/weather/2.gbapal");
-const u8 WeatherFog0Tiles[] = INCBIN_U8("graphics/weather/fog0.4bpp");
 const u8 gWeatherFog1Tiles[] = INCBIN_U8("graphics/weather/fog1.4bpp");
-const u8 WeatherCloudTiles[] = INCBIN_U8("graphics/weather/cloud.4bpp");
-const u8 gSpriteImage_8398948[] = INCBIN_U8("graphics/weather/snow0.4bpp");
-const u8 gSpriteImage_8398968[] = INCBIN_U8("graphics/weather/snow1.4bpp");
-const u8 WeatherBubbleTiles[] = INCBIN_U8("graphics/weather/bubble.4bpp");
-const u8 WeatherAshTiles[] = INCBIN_U8("graphics/weather/ash.4bpp");
-const u8 WeatherRainTiles[] = INCBIN_U8("graphics/weather/rain.4bpp");
-const u8 WeatherSandstormTiles[] = INCBIN_U8("graphics/weather/sandstorm.4bpp");
+const u8 gWeatherFog2Tiles[] = INCBIN_U8("graphics/weather/fog2.4bpp");
+const u8 gWeatherCloudTiles[] = INCBIN_U8("graphics/weather/cloud.4bpp");
+const u8 gWeatherSnow1Tiles[] = INCBIN_U8("graphics/weather/snow0.4bpp");
+const u8 gWeatherSnow2Tiles[] = INCBIN_U8("graphics/weather/snow1.4bpp");
+const u8 gWeatherBubbleTiles[] = INCBIN_U8("graphics/weather/bubble.4bpp");
+const u8 gWeatherAshTiles[] = INCBIN_U8("graphics/weather/ash.4bpp");
+const u8 gWeatherRainTiles[] = INCBIN_U8("graphics/weather/rain.4bpp");
+const u8 gWeatherSandstormTiles[] = INCBIN_U8("graphics/weather/sandstorm.4bpp");
 
-const struct Coords16 gUnknown_0839A9C8[] =
+static const struct Coords16 gUnknown_0839A9C8[] =
 {
     { 0, 66},
     { 5, 73},
     {10, 78},
 };
 
-const struct SpriteSheet gWeatherCloudSpriteSheet = {WeatherCloudTiles, 0x800, 0x1200};
+static const struct SpriteSheet sCloudSpriteSheet = {gWeatherCloudTiles, 0x800, 0x1200};
 
-const struct OamData gOamData_839A9DC =
+static const struct OamData gOamData_839A9DC =
 {
     .y = 0,
     .affineMode = 0,
@@ -55,19 +49,19 @@ const struct OamData gOamData_839A9DC =
     .affineParam = 0,
 };
 
-const union AnimCmd gSpriteAnim_839A9E4[] =
+static const union AnimCmd gSpriteAnim_839A9E4[] =
 {
     ANIMCMD_FRAME(0, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd *const gSpriteAnimTable_839A9EC[] =
+static const union AnimCmd *const gSpriteAnimTable_839A9EC[] =
 {
     gSpriteAnim_839A9E4,
 };
 
 void sub_807E0F4(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839A9F0 =
+static const struct SpriteTemplate sCloudSpriteTemplate =
 {
     .tileTag = 4608,
     .paletteTag = 4609,
@@ -84,8 +78,8 @@ extern void sub_807D9A8(void);
 extern bool8 sub_807D9C8(void);
 extern void sub_807DA14(void);
 extern void sub_807DA4C(void);
-extern void sub_807DBA4(u8 a, u8 b, int c);
-extern bool8 sub_807DBE8(void);
+extern void Weather_SetTargetBlendCoeffs(u8 a, u8 b, int c);
+extern bool8 Weather_UpdateBlend(void);
 extern void SetRainStrengthFromSoundEffect(u16 sndEff);
 extern void sub_807D5F0(u8 a, u8 b, u8 c);
 
@@ -93,44 +87,44 @@ extern void sub_807D5F0(u8 a, u8 b, u8 c);
 // Clouds
 //------------------------------------------------------------------------------
 
-void sub_807DE78(void)
+void Clouds_InitVars(void)
 {
     gWeatherPtr->unknown_6C1 = 0;
     gWeatherPtr->unknown_6C2 = 20;
-    gWeatherPtr->unknown_6D2 = 0;
-    gWeatherPtr->unknown_6CC = 0;
-    if (gWeatherPtr->unknown_6DE == 0)
-        sub_807DB64(0, 16);
+    gWeatherPtr->weatherGfxLoaded = FALSE;
+    gWeatherPtr->initStep = 0;
+    if (gWeatherPtr->cloudsActive == FALSE)
+        Weather_SetBlendCoeffs(0, 16);
 }
 
-void sub_807DEF4(void);
+void Clouds_Main(void);
 
-void sub_807DEC4(void)
+void Clouds_InitAll(void)
 {
-    sub_807DE78();
-    while (gWeatherPtr->unknown_6D2 == 0)
-        sub_807DEF4();
+    Clouds_InitVars();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        Clouds_Main();
 }
 
-void sub_807DFD4(void);
+void CreateCloudSprites(void);
 
-void sub_807DEF4(void)
+void Clouds_Main(void)
 {
-    switch (gWeatherPtr->unknown_6CC)
+    switch (gWeatherPtr->initStep)
     {
     case 0:
-        sub_807DFD4();
-        gWeatherPtr->unknown_6CC++;
+        CreateCloudSprites();
+        gWeatherPtr->initStep++;
         break;
     case 1:
-        sub_807DBA4(12, 8, 1);
-        gWeatherPtr->unknown_6CC++;
+        Weather_SetTargetBlendCoeffs(12, 8, 1);
+        gWeatherPtr->initStep++;
         break;
     case 2:
-        if (sub_807DBE8())
+        if (Weather_UpdateBlend())
         {
-            gWeatherPtr->unknown_6D2 = 1;
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->weatherGfxLoaded = TRUE;
+            gWeatherPtr->initStep++;
         }
         break;
     }
@@ -138,16 +132,16 @@ void sub_807DEF4(void)
 
 void sub_807E0A0(void);
 
-bool8 sub_807DF54(void)
+bool8 Clouds_Finish(void)
 {
     switch (gWeatherPtr->unknown_6CE)
     {
     case 0:
-        sub_807DBA4(0, 16, 1);
+        Weather_SetTargetBlendCoeffs(0, 16, 1);
         gWeatherPtr->unknown_6CE++;
         return TRUE;
     case 1:
-        if (sub_807DBE8())
+        if (Weather_UpdateBlend())
         {
             sub_807E0A0();
             gWeatherPtr->unknown_6CE++;
@@ -177,17 +171,17 @@ int sub_807DFD0(void)
     return 0;
 }
 
-void sub_807DFD4(void)
+void CreateCloudSprites(void)
 {
     u16 i;
 
-    if (gWeatherPtr->unknown_6DE == 1)
+    if (gWeatherPtr->cloudsActive == TRUE)
         return;
-    LoadSpriteSheet(&gWeatherCloudSpriteSheet);
+    LoadSpriteSheet(&sCloudSpriteSheet);
     sub_807D8C0(gUnknown_08397108);
     for (i = 0; i < 3; i++)
     {
-        u8 spriteId = CreateSprite(&gSpriteTemplate_839A9F0, 0, 0, 0xFF);
+        u8 spriteId = CreateSprite(&sCloudSpriteTemplate, 0, 0, 0xFF);
 
         if (spriteId != 64)
         {
@@ -203,14 +197,14 @@ void sub_807DFD4(void)
             gWeatherPtr->cloudSprites[i] = NULL;
         }
     }
-    gWeatherPtr->unknown_6DE = 1;
+    gWeatherPtr->cloudsActive = TRUE;
 }
 
 void sub_807E0A0(void)
 {
     u16 i;
 
-    if (gWeatherPtr->unknown_6DE == 0)
+    if (gWeatherPtr->cloudsActive == FALSE)
         return;
     for (i = 0; i < 3; i++)
     {
@@ -218,7 +212,7 @@ void sub_807E0A0(void)
             DestroySprite(gWeatherPtr->cloudSprites[i]);
     }
     FreeSpriteTilesByTag(0x1200);
-    gWeatherPtr->unknown_6DE = 0;
+    gWeatherPtr->cloudsActive = FALSE;
 }
 
 void sub_807E0F4(struct Sprite *sprite)
@@ -230,8 +224,8 @@ void sub_807E0F4(struct Sprite *sprite)
 
 void sub_807E110(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6C1 = 0;
     gWeatherPtr->unknown_6C2 = 0;
 }
@@ -241,36 +235,36 @@ void sub_807E174(void);
 void sub_807E144(void)
 {
     sub_807E110();
-    while (gWeatherPtr->unknown_6D2 == 0)
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
         sub_807E174();
 }
 
 void sub_807E174(void)
 {
-    switch (gWeatherPtr->unknown_6CC)
+    switch (gWeatherPtr->initStep)
     {
     case 0:
         if (gWeatherPtr->unknown_6C6 != 0)
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->initStep++;
         break;
     case 1:
         sub_807D9A8();
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 2:
         if (sub_807D9C8() == FALSE)
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->initStep++;
         break;
     case 3:
         sub_807DA14();
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 4:
         sub_807DA4C();
         if (gWeatherPtr->unknown_73C == 6)
         {
-            gWeatherPtr->unknown_6D2 = 1;
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->weatherGfxLoaded = TRUE;
+            gWeatherPtr->initStep++;
         }
         break;
     default:
@@ -307,7 +301,8 @@ void task50_0807B6D4(u8 taskId)
         task->tBlendDelay = 0;
         task->tWinRange = REG_WININ;
         REG_WININ = WIN_RANGE(63, 63);
-        REG_BLDCNT = 0x9E;
+        REG_BLDCNT = BLDCNT_TGT1_BG1 | BLDCNT_TGT1_BG2 | BLDCNT_TGT1_BG3 | BLDCNT_TGT1_OBJ
+                   | BLDCNT_EFFECT_LIGHTEN;
         REG_BLDY = 0;
         task->tState++;
         // fall through
@@ -357,8 +352,8 @@ void task50_0807B6D4(u8 taskId)
 
 void LightRain_InitVars(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6D6 = 0;
     gWeatherPtr->unknown_6DB = 8;
     gWeatherPtr->unknown_6DC = 0;
@@ -368,36 +363,36 @@ void LightRain_InitVars(void)
     SetRainStrengthFromSoundEffect(SE_T_KOAME);
 }
 
-void sub_807E400(void);
+void LightRain_Main(void);
 
-void sub_807E3D0(void)
+void LightRain_InitAll(void)
 {
     LightRain_InitVars();
-    while (gWeatherPtr->unknown_6D2 == 0)
-        sub_807E400();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        LightRain_Main();
 }
 
-void sub_807E7A4(void);
-u8 sub_807E7B4(void);
+void LoadRainSpriteSheet(void);
+u8 CreateRainSprites(void);
 u8 sub_807E8E8(void);
 
-void sub_807E400(void)
+void LightRain_Main(void)
 {
-    switch (gWeatherPtr->unknown_6CC)
+    switch (gWeatherPtr->initStep)
     {
     case 0:
-        sub_807E7A4();
-        gWeatherPtr->unknown_6CC++;
+        LoadRainSpriteSheet();
+        gWeatherPtr->initStep++;
         break;
     case 1:
-        if (sub_807E7B4() == 0)
-            gWeatherPtr->unknown_6CC++;
+        if (CreateRainSprites() == 0)
+            gWeatherPtr->initStep++;
         break;
     case 2:
         if (sub_807E8E8() == FALSE)
         {
-            gWeatherPtr->unknown_6D2 = 1;
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->weatherGfxLoaded = TRUE;
+            gWeatherPtr->initStep++;
         }
         break;
     }
@@ -405,14 +400,14 @@ void sub_807E400(void)
 
 void sub_807E974(void);
 
-bool8 sub_807E460(void)
+bool8 LightRain_Finish(void)
 {
     switch (gWeatherPtr->unknown_6CE)
     {
     case 0:
-        if (gWeatherPtr->unknown_6D1 == 3
-         || gWeatherPtr->unknown_6D1 == 5
-         || gWeatherPtr->unknown_6D1 == 13)
+        if (gWeatherPtr->nextWeather == WEATHER_RAIN_LIGHT
+         || gWeatherPtr->nextWeather == WEATHER_RAIN_MED
+         || gWeatherPtr->nextWeather == WEATHER_RAIN_HEAVY)
         {
             gWeatherPtr->unknown_6CE = 0xFF;
             return FALSE;
@@ -542,11 +537,11 @@ void sub_807E6F0(struct Sprite *sprite, u16 b)
     }
 }
 
-extern const struct SpriteSheet gUnknown_0839AACC;  // defined below
+extern const struct SpriteSheet sRainSpriteSheet;  // defined below
 
-void sub_807E7A4(void)
+void LoadRainSpriteSheet(void)
 {
-    LoadSpriteSheet(&gUnknown_0839AACC);
+    LoadSpriteSheet(&sRainSpriteSheet);
 }
 
 const struct Coords16 gUnknown_0839AA08[] =
@@ -577,7 +572,7 @@ const struct Coords16 gUnknown_0839AA08[] =
     { 48,  96},
 };
 
-const struct OamData gOamData_839AA68 =
+static const struct OamData gOamData_839AA68 =
 {
     .y = 0,
     .affineMode = 0,
@@ -594,13 +589,13 @@ const struct OamData gOamData_839AA68 =
     .affineParam = 0,
 };
 
-const union AnimCmd gSpriteAnim_839AA70[] =
+static const union AnimCmd gSpriteAnim_839AA70[] =
 {
     ANIMCMD_FRAME(0, 16),
     ANIMCMD_JUMP(0),
 };
 
-const union AnimCmd gSpriteAnim_839AA78[] =
+static const union AnimCmd gSpriteAnim_839AA78[] =
 {
     ANIMCMD_FRAME(8, 3),
     ANIMCMD_FRAME(32, 2),
@@ -608,7 +603,7 @@ const union AnimCmd gSpriteAnim_839AA78[] =
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AA88[] =
+static const union AnimCmd gSpriteAnim_839AA88[] =
 {
     ANIMCMD_FRAME(8, 3),
     ANIMCMD_FRAME(16, 3),
@@ -616,14 +611,14 @@ const union AnimCmd gSpriteAnim_839AA88[] =
     ANIMCMD_END,
 };
 
-const union AnimCmd *const gSpriteAnimTable_839AA98[] =
+static const union AnimCmd *const gSpriteAnimTable_839AA98[] =
 {
     gSpriteAnim_839AA70,
     gSpriteAnim_839AA78,
     gSpriteAnim_839AA88,
 };
 
-const struct SpriteTemplate gSpriteTemplate_839AAA4 =
+static const struct SpriteTemplate sRainSpriteTemplate =
 {
     .tileTag = 4614,
     .paletteTag = 4608,
@@ -647,9 +642,9 @@ const u16 gUnknown_0839AAC4[][2] =
     {12, 10},
 };
 
-const struct SpriteSheet gUnknown_0839AACC = {WeatherRainTiles, sizeof(WeatherRainTiles), 0x1206};
+static const struct SpriteSheet sRainSpriteSheet = {gWeatherRainTiles, sizeof(gWeatherRainTiles), 0x1206};
 
-const struct OamData gOamData_839AAD4 =
+static const struct OamData gOamData_839AAD4 =
 {
     .y = 0,
     .affineMode = 0,
@@ -666,32 +661,32 @@ const struct OamData gOamData_839AAD4 =
     .affineParam = 0,
 };
 
-const struct SpriteFrameImage gSpriteImageTable_839AADC[] =
+static const struct SpriteFrameImage gSpriteImageTable_839AADC[] =
 {
-    {gSpriteImage_8398948, sizeof(gSpriteImage_8398948)},
-    {gSpriteImage_8398968, sizeof(gSpriteImage_8398968)},
+    {gWeatherSnow1Tiles, sizeof(gWeatherSnow1Tiles)},
+    {gWeatherSnow2Tiles, sizeof(gWeatherSnow2Tiles)},
 };
 
-const union AnimCmd gSpriteAnim_839AAEC[] =
+static const union AnimCmd gSpriteAnim_839AAEC[] =
 {
     ANIMCMD_FRAME(0, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AAF4[] =
+static const union AnimCmd gSpriteAnim_839AAF4[] =
 {
     ANIMCMD_FRAME(1, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd *const gSpriteAnimTable_839AAFC[] =
+static const union AnimCmd *const gSpriteAnimTable_839AAFC[] =
 {
     gSpriteAnim_839AAEC,
     gSpriteAnim_839AAF4,
 };
 
 void sub_807ED48(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839AB04 =
+static const struct SpriteTemplate sSnowflakeSpriteTemplate =
 {
     .tileTag = 0xFFFF,
     .paletteTag = 4608,
@@ -703,9 +698,9 @@ const struct SpriteTemplate gSpriteTemplate_839AB04 =
 };
 
 // unused data
-const u16 unusedData_839AB1C[] = {0, 6, 6, 12, 18, 42, 300, 300};
+static const u16 unusedData_839AB1C[] = {0, 6, 6, 12, 18, 42, 300, 300};
 
-const struct OamData gOamData_839AB2C =
+static const struct OamData gOamData_839AB2C =
 {
     .y = 0,
     .affineMode = 0,
@@ -722,43 +717,43 @@ const struct OamData gOamData_839AB2C =
     .affineParam = 0,
 };
 
-const union AnimCmd gSpriteAnim_839AB34[] =
+static const union AnimCmd gSpriteAnim_839AB34[] =
 {
     ANIMCMD_FRAME(0, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AB3C[] =
+static const union AnimCmd gSpriteAnim_839AB3C[] =
 {
     ANIMCMD_FRAME(32, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AB44[] =
+static const union AnimCmd gSpriteAnim_839AB44[] =
 {
     ANIMCMD_FRAME(64, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AB4C[] =
+static const union AnimCmd gSpriteAnim_839AB4C[] =
 {
     ANIMCMD_FRAME(96, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AB54[] =
+static const union AnimCmd gSpriteAnim_839AB54[] =
 {
     ANIMCMD_FRAME(128, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd gSpriteAnim_839AB5C[] =
+static const union AnimCmd gSpriteAnim_839AB5C[] =
 {
     ANIMCMD_FRAME(160, 16),
     ANIMCMD_END,
 };
 
-const union AnimCmd *const gSpriteAnimTable_839AB64[] =
+static const union AnimCmd *const gSpriteAnimTable_839AB64[] =
 {
     gSpriteAnim_839AB34,
     gSpriteAnim_839AB3C,
@@ -768,19 +763,19 @@ const union AnimCmd *const gSpriteAnimTable_839AB64[] =
     gSpriteAnim_839AB5C,
 };
 
-const union AffineAnimCmd gSpriteAffineAnim_839AB7C[] =
+static const union AffineAnimCmd gSpriteAffineAnim_839AB7C[] =
 {
     AFFINEANIMCMD_FRAME(0x200, 0x200, 0, 0),
     AFFINEANIMCMD_END,
 };
 
-const union AffineAnimCmd *const gSpriteAffineAnimTable_839AB8C[] =
+static const union AffineAnimCmd *const gSpriteAffineAnimTable_839AB8C[] =
 {
     gSpriteAffineAnim_839AB7C,
 };
 
-void sub_807F688(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839AB90 =
+static void Fog2SpriteCallback(struct Sprite *);
+static const struct SpriteTemplate sFog2SpriteTemplate =
 {
     .tileTag = 4609,
     .paletteTag = 4608,
@@ -788,145 +783,10 @@ const struct SpriteTemplate gSpriteTemplate_839AB90 =
     .anims = gSpriteAnimTable_839AB64,
     .images = NULL,
     .affineAnims = gSpriteAffineAnimTable_839AB8C,
-    .callback = sub_807F688,
-};
-
-const struct SpriteSheet gWeatherFog1SpriteSheet = {gWeatherFog1Tiles, sizeof(gWeatherFog1Tiles), 0x1201};
-const struct SpriteSheet gWeatherAshSpriteSheet = {WeatherAshTiles, sizeof(WeatherAshTiles), 0x1202};
-
-const struct OamData gOamData_839ABB8 =
-{
-    .y = 0,
-    .affineMode = 0,
-    .objMode = 1,
-    .mosaic = 0,
-    .bpp = 0,
-    .shape = 0,
-    .x = 0,
-    .matrixNum = 0,
-    .size = 3,
-    .tileNum = 0,
-    .priority = 1,
-    .paletteNum = 15,
-    .affineParam = 0,
-};
-
-const union AnimCmd gSpriteAnim_839ABC0[] =
-{
-    ANIMCMD_FRAME(0, 60),
-    ANIMCMD_FRAME(64, 60),
-    ANIMCMD_JUMP(0),
-};
-
-const union AnimCmd *const gSpriteAnimTable_839ABCC[] =
-{
-    gSpriteAnim_839ABC0,
-};
-
-void sub_807FAA8(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839ABD0 =
-{
-    .tileTag = 4610,
-    .paletteTag = 4608,
-    .oam = &gOamData_839ABB8,
-    .anims = gSpriteAnimTable_839ABCC,
-    .images = NULL,
-    .affineAnims = gDummySpriteAffineAnimTable,
-    .callback = sub_807FAA8,
-};
-
-const struct SpriteSheet gWeatherFog0SpriteSheet = {WeatherFog0Tiles, sizeof(WeatherFog0Tiles), 0x1203};
-
-const struct OamData gOamData_839ABF0 =
-{
-    .y = 0,
-    .affineMode = 0,
-    .objMode = 1,
-    .mosaic = 0,
-    .bpp = 0,
-    .shape = 0,
-    .x = 0,
-    .matrixNum = 0,
-    .size = 3,
-    .tileNum = 0,
-    .priority = 2,
-    .paletteNum = 0,
-    .affineParam = 0,
-};
-
-const union AnimCmd gSpriteAnim_839ABF8[] =
-{
-    ANIMCMD_FRAME(0, 16),
-    ANIMCMD_END,
-};
-
-const union AnimCmd *const gSpriteAnimTable_839AC00[] =
-{
-    gSpriteAnim_839ABF8,
-};
-
-void sub_807FE3C(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839AC04 =
-{
-    .tileTag = 4611,
-    .paletteTag = 4608,
-    .oam = &gOamData_839ABF0,
-    .anims = gSpriteAnimTable_839AC00,
-    .images = NULL,
-    .affineAnims = gDummySpriteAffineAnimTable,
-    .callback = sub_807FE3C,
-};
-
-const struct OamData gOamData_839AC1C =
-{
-    .y = 0,
-    .affineMode = 0,
-    .objMode = 1,
-    .mosaic = 0,
-    .bpp = 0,
-    .shape = 0,
-    .x = 0,
-    .matrixNum = 0,
-    .size = 3,
-    .tileNum = 0,
-    .priority = 1,
-    .paletteNum = 0,
-    .affineParam = 0,
-};
-
-const union AnimCmd gSpriteAnim_839AC24[] =
-{
-    ANIMCMD_FRAME(0, 3),
-    ANIMCMD_END,
-};
-
-const union AnimCmd gSpriteAnim_839AC2C[] =
-{
-    ANIMCMD_FRAME(64, 3),
-    ANIMCMD_END,
-};
-
-const union AnimCmd *const gSpriteAnimTable_839AC34[] =
-{
-    gSpriteAnim_839AC24,
-    gSpriteAnim_839AC2C,
-};
-
-void sub_8080338(struct Sprite *);
-const struct SpriteTemplate gSpriteTemplate_839AC3C =
-{
-    .tileTag = 4612,
-    .paletteTag = 4609,
-    .oam = &gOamData_839AC1C,
-    .anims = gSpriteAnimTable_839AC34,
-    .images = NULL,
-    .affineAnims = gDummySpriteAffineAnimTable,
-    .callback = sub_8080338,
+    .callback = Fog2SpriteCallback,
 };
 
-const struct SpriteSheet gWeatherSandstormSpriteSheet = {WeatherSandstormTiles, sizeof(WeatherSandstormTiles), 0x1204};
-
-bool8 sub_807E7B4(void)
+bool8 CreateRainSprites(void)
 {
     u8 r7;
     u8 spriteId;
@@ -935,7 +795,7 @@ bool8 sub_807E7B4(void)
         return FALSE;
 
     r7 = gWeatherPtr->unknown_6DA;
-    spriteId = CreateSpriteAtEnd(&gSpriteTemplate_839AAA4,
+    spriteId = CreateSpriteAtEnd(&sRainSpriteTemplate,
       gUnknown_0839AA08[r7].x, gUnknown_0839AA08[r7].y, 78);
     if (spriteId != 64)
     {
@@ -946,11 +806,11 @@ bool8 sub_807E7B4(void)
         sub_807E4EC(&gSprites[spriteId]);
         sub_807E6F0(&gSprites[spriteId], r7 * 9);
         gSprites[spriteId].invisible = TRUE;
-        gWeatherPtr->unknown_0[r7] = &gSprites[spriteId];
+        gWeatherPtr->rainSprites[r7] = &gSprites[spriteId];
     }
     else
     {
-        gWeatherPtr->unknown_0[r7] = NULL;
+        gWeatherPtr->rainSprites[r7] = NULL;
     }
 
     if (++gWeatherPtr->unknown_6DA == 24)
@@ -959,12 +819,12 @@ bool8 sub_807E7B4(void)
 
         for (i = 0; i < 24; i++)
         {
-            if (gWeatherPtr->unknown_0[i] != NULL)
+            if (gWeatherPtr->rainSprites[i] != NULL)
             {
-                if (gWeatherPtr->unknown_0[i]->data[6] == 0)
-                    gWeatherPtr->unknown_0[i]->callback = sub_807E5C0;
+                if (gWeatherPtr->rainSprites[i]->data[6] == 0)
+                    gWeatherPtr->rainSprites[i]->callback = sub_807E5C0;
                 else
-                    gWeatherPtr->unknown_0[i]->callback = sub_807E6C4;
+                    gWeatherPtr->rainSprites[i]->callback = sub_807E6C4;
             }
         }
         return FALSE;
@@ -982,13 +842,13 @@ bool8 sub_807E8E8(void)
         gWeatherPtr->unknown_6D6 = 0;
         if (gWeatherPtr->unknown_6D8 < gWeatherPtr->unknown_6D9)
         {
-            gWeatherPtr->unknown_0[gWeatherPtr->unknown_6D8++]->data[5] = 1;
+            gWeatherPtr->rainSprites[gWeatherPtr->unknown_6D8++]->data[5] = 1;
         }
         else
         {
             gWeatherPtr->unknown_6D8--;
-            gWeatherPtr->unknown_0[gWeatherPtr->unknown_6D8]->data[5] = 0;
-            gWeatherPtr->unknown_0[gWeatherPtr->unknown_6D8]->invisible = TRUE;
+            gWeatherPtr->rainSprites[gWeatherPtr->unknown_6D8]->data[5] = 0;
+            gWeatherPtr->rainSprites[gWeatherPtr->unknown_6D8]->invisible = TRUE;
         }
     }
     return TRUE;
@@ -1000,8 +860,8 @@ void sub_807E974(void)
 
     for (i = 0; i < gWeatherPtr->unknown_6DA; i++)
     {
-        if (gWeatherPtr->unknown_0[i] != NULL)
-            DestroySprite(gWeatherPtr->unknown_0[i]);
+        if (gWeatherPtr->rainSprites[i] != NULL)
+            DestroySprite(gWeatherPtr->rainSprites[i]);
     }
     gWeatherPtr->unknown_6DA = 0;
     FreeSpriteTilesByTag(0x1206);
@@ -1013,26 +873,26 @@ void sub_807E974(void)
 
 void Snow_InitVars(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6C1 = 3;
     gWeatherPtr->unknown_6C2 = 20;
     gWeatherPtr->unknown_6E5 = 16;
     gWeatherPtr->unknown_6E0 = 0;
 }
 
-void snowflakes_progress2(void);
+void Snow_Main(void);
 void sub_807ED48(struct Sprite *);
 
-void sub_807EA18(void)
+void Snow_InitAll(void)
 {
     Snow_InitVars();
-    while (gWeatherPtr->unknown_6D2 == 0)
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
     {
         u16 i;
 
-        snowflakes_progress2();
-        for (i = 0; i < gWeatherPtr->unknown_6E4; i++)
+        Snow_Main();
+        for (i = 0; i < gWeatherPtr->snowflakeSpriteCount; i++)
         {
             sub_807ED48(gWeatherPtr->snowflakeSprites[i]);
         }
@@ -1041,16 +901,16 @@ void sub_807EA18(void)
 
 u8 snowflakes_progress(void);
 
-void snowflakes_progress2(void)
+void Snow_Main(void)
 {
-    if (gWeatherPtr->unknown_6CC == 0 && snowflakes_progress() == FALSE)
+    if (gWeatherPtr->initStep == 0 && snowflakes_progress() == FALSE)
     {
-        gWeatherPtr->unknown_6D2 = 1;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->weatherGfxLoaded = TRUE;
+        gWeatherPtr->initStep++;
     }
 }
 
-bool8 sub_807EAC0(void)
+bool8 Snow_Finish(void)
 {
     switch (gWeatherPtr->unknown_6CE)
     {
@@ -1070,46 +930,46 @@ bool8 sub_807EAC0(void)
     return FALSE;
 }
 
-bool8 snowflake_add(void);
-bool8 snowflake_remove(void);
+bool8 CreateSnowflakeSprite(void);
+bool8 RemoveSnowflakeSprite(void);
 
 bool8 snowflakes_progress(void)
 {
-    if (gWeatherPtr->unknown_6E4 == gWeatherPtr->unknown_6E5)
+    if (gWeatherPtr->snowflakeSpriteCount == gWeatherPtr->unknown_6E5)
         return FALSE;
 
     gWeatherPtr->unknown_6E0++;
     if (gWeatherPtr->unknown_6E0 > 36)
     {
         gWeatherPtr->unknown_6E0 = 0;
-        if (gWeatherPtr->unknown_6E4 < gWeatherPtr->unknown_6E5)
-            snowflake_add();
+        if (gWeatherPtr->snowflakeSpriteCount < gWeatherPtr->unknown_6E5)
+            CreateSnowflakeSprite();
         else
-            snowflake_remove();
+            RemoveSnowflakeSprite();
     }
-    return (gWeatherPtr->unknown_6E4 != gWeatherPtr->unknown_6E5);
+    return (gWeatherPtr->snowflakeSpriteCount != gWeatherPtr->unknown_6E5);
 }
 
 void sub_807EC40(struct Sprite *);
 
-bool8 snowflake_add(void)
+bool8 CreateSnowflakeSprite(void)
 {
-    u8 spriteId = CreateSpriteAtEnd(&gSpriteTemplate_839AB04, 0, 0, 78);
+    u8 spriteId = CreateSpriteAtEnd(&sSnowflakeSpriteTemplate, 0, 0, 78);
 
     if (spriteId == 64)
         return FALSE;
-    gSprites[spriteId].data[4] = gWeatherPtr->unknown_6E4;
+    gSprites[spriteId].data[4] = gWeatherPtr->snowflakeSpriteCount;
     sub_807EC40(&gSprites[spriteId]);
     gSprites[spriteId].coordOffsetEnabled = TRUE;
-    gWeatherPtr->snowflakeSprites[gWeatherPtr->unknown_6E4++] = &gSprites[spriteId];
+    gWeatherPtr->snowflakeSprites[gWeatherPtr->snowflakeSpriteCount++] = &gSprites[spriteId];
     return TRUE;
 }
 
-bool8 snowflake_remove(void)
+bool8 RemoveSnowflakeSprite(void)
 {
-    if (gWeatherPtr->unknown_6E4 != 0)
+    if (gWeatherPtr->snowflakeSpriteCount != 0)
     {
-        DestroySprite(gWeatherPtr->snowflakeSprites[--gWeatherPtr->unknown_6E4]);
+        DestroySprite(gWeatherPtr->snowflakeSprites[--gWeatherPtr->snowflakeSpriteCount]);
         return TRUE;
     }
     return FALSE;
@@ -1196,108 +1056,108 @@ void sub_807ED48(struct Sprite *sprite)
 // Medium Rain
 //------------------------------------------------------------------------------
 
-void sub_807EE80(void)
+void MedRain_InitVars(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6D6 = 0;
     gWeatherPtr->unknown_6DB = 4;
     gWeatherPtr->unknown_6DC = 0;
     gWeatherPtr->unknown_6D9 = 16;
     gWeatherPtr->unknown_6C1 = 3;
     gWeatherPtr->unknown_6C2 = 20;
-    gWeatherPtr->unknown_6D2 = 0;  // duplicate assignment
+    gWeatherPtr->weatherGfxLoaded = FALSE;  // duplicate assignment
     gWeatherPtr->unknown_6ED = 0;
     SetRainStrengthFromSoundEffect(SE_T_AME);
 }
 
-void sub_807EFC0(void);
+void Rain_Main(void);
 
-void sub_807EEF4(void)
+void MedRain_InitAll(void)
 {
-    sub_807EE80();
-    while (gWeatherPtr->unknown_6D2 == 0)
-        sub_807EFC0();
+    MedRain_InitVars();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        Rain_Main();
 }
 
 //------------------------------------------------------------------------------
 // Heavy Rain
 //------------------------------------------------------------------------------
 
-void sub_807EF24(void)
+void HeavyRain_InitVars(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6D6 = 0;
     gWeatherPtr->unknown_6DB = 4;
     gWeatherPtr->unknown_6DC = 1;
     gWeatherPtr->unknown_6D9 = 24;
     gWeatherPtr->unknown_6C1 = 3;
     gWeatherPtr->unknown_6C2 = 20;
-    gWeatherPtr->unknown_6D2 = 0;  // duplicate assignment
+    gWeatherPtr->weatherGfxLoaded = FALSE;  // duplicate assignment
     SetRainStrengthFromSoundEffect(SE_T_OOAME);
 }
 
-void sub_807EF90(void)
+void HeavyRain_InitAll(void)
 {
-    sub_807EF24();
-    while (gWeatherPtr->unknown_6D2 == 0)
-        sub_807EFC0();
+    HeavyRain_InitVars();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        Rain_Main();
 }
 
-void sub_807F434(void);
-void sub_807F3F8(u16);
+void UpdateThunderSound(void);
+void SetThunderCounter(u16);
 
-void sub_807EFC0(void)
+void Rain_Main(void)
 {
-    sub_807F434();
-    switch (gWeatherPtr->unknown_6CC)
+    UpdateThunderSound();
+    switch (gWeatherPtr->initStep)
     {
     case 0:
-        sub_807E7A4();
-        gWeatherPtr->unknown_6CC++;
+        LoadRainSpriteSheet();
+        gWeatherPtr->initStep++;
         break;
     case 1:
-        if (sub_807E7B4())
+        if (CreateRainSprites())
             break;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 2:
         if (sub_807E8E8())
             break;
-        gWeatherPtr->unknown_6D2 = 1;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->weatherGfxLoaded = TRUE;
+        gWeatherPtr->initStep++;
         break;
     case 3:
         if (gWeatherPtr->unknown_6C6 == 0)
             break;
-        gWeatherPtr->unknown_6CC = 6;
+        gWeatherPtr->initStep = 6;
         break;
     case 4:
         gWeatherPtr->unknown_6EA = 1;
         gWeatherPtr->unknown_6E6 = (Random() % 360) + 360;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         // fall through
     case 5:
         if (--gWeatherPtr->unknown_6E6 != 0)
             break;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 6:
         gWeatherPtr->unknown_6EA = 1;
         gWeatherPtr->unknown_6EB = Random() % 2;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 7:
         gWeatherPtr->unknown_6EC = (Random() & 1) + 1;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         // fall through
     case 8:
         sub_807D5BC(19);
         if (gWeatherPtr->unknown_6EB == 0 && gWeatherPtr->unknown_6EC == 1)
-            sub_807F3F8(20);
+            SetThunderCounter(20);
         gWeatherPtr->unknown_6E6 = (Random() % 3) + 6;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 9:
         if (--gWeatherPtr->unknown_6E6 != 0)
@@ -1307,51 +1167,51 @@ void sub_807EFC0(void)
         if (--gWeatherPtr->unknown_6EC != 0)
         {
             gWeatherPtr->unknown_6E6 = (Random() % 16) + 60;
-            gWeatherPtr->unknown_6CC = 10;
+            gWeatherPtr->initStep = 10;
         }
         else if (gWeatherPtr->unknown_6EB == 0)
         {
-            gWeatherPtr->unknown_6CC = 4;
+            gWeatherPtr->initStep = 4;
         }
         else
         {
-            gWeatherPtr->unknown_6CC = 11;
+            gWeatherPtr->initStep = 11;
         }
         break;
     case 10:
         if (--gWeatherPtr->unknown_6E6 != 0)
             break;
-        gWeatherPtr->unknown_6CC = 8;
+        gWeatherPtr->initStep = 8;
         break;
     case 11:
         gWeatherPtr->unknown_6E6 = (Random() % 16) + 60;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 12:
         if (--gWeatherPtr->unknown_6E6 != 0)
             break;
-        sub_807F3F8(100);
+        SetThunderCounter(100);
         sub_807D5BC(19);
         // Why use "% 16" everywhere else and "& 0xF" here. So dumb.
         gWeatherPtr->unknown_6E6 = (Random() & 0xF) + 30;
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 13:
         if (--gWeatherPtr->unknown_6E6 != 0)
             break;
         sub_807D5F0(19, 3, 5);
-        gWeatherPtr->unknown_6CC++;
+        gWeatherPtr->initStep++;
         break;
     case 14:
         if (gWeatherPtr->unknown_6C6 != 3)
             break;
         gWeatherPtr->unknown_6EA = 1;
-        gWeatherPtr->unknown_6CC = 4;
+        gWeatherPtr->initStep = 4;
         break;
     }
 }
 
-bool8 sub_807F34C(void)
+bool8 Rain_Finish(void)
 {
     switch (gWeatherPtr->unknown_6CE)
     {
@@ -1360,12 +1220,12 @@ bool8 sub_807F34C(void)
         gWeatherPtr->unknown_6CE++;
         // fall through
     case 1:
-        sub_807EFC0();
+        Rain_Main();
         if (gWeatherPtr->unknown_6EA != 0)
         {
-            if (gWeatherPtr->unknown_6D1 == 3
-             || gWeatherPtr->unknown_6D1 == 5
-             || gWeatherPtr->unknown_6D1 == 13)
+            if (gWeatherPtr->nextWeather == WEATHER_RAIN_LIGHT
+             || gWeatherPtr->nextWeather == WEATHER_RAIN_MED
+             || gWeatherPtr->nextWeather == WEATHER_RAIN_HEAVY)
                 return FALSE;
             gWeatherPtr->unknown_6D9 = 0;
             gWeatherPtr->unknown_6CE++;
@@ -1384,20 +1244,20 @@ bool8 sub_807F34C(void)
     return TRUE;
 }
 
-void sub_807F3F8(u16 a)
+void SetThunderCounter(u16 max)
 {
     if (gWeatherPtr->unknown_6ED == 0)
     {
-        gWeatherPtr->unknown_6E8 = Random() % a;
+        gWeatherPtr->thunderCounter = Random() % max;
         gWeatherPtr->unknown_6ED = 1;
     }
 }
 
-void sub_807F434(void)
+void UpdateThunderSound(void)
 {
     if (gWeatherPtr->unknown_6ED == 1)
     {
-        if (gWeatherPtr->unknown_6E8 == 0)
+        if (gWeatherPtr->thunderCounter == 0)
         {
             if (IsSEPlaying())
                 return;
@@ -1409,70 +1269,72 @@ void sub_807F434(void)
         }
         else
         {
-            gWeatherPtr->unknown_6E8--;
+            gWeatherPtr->thunderCounter--;
         }
     }
 }
 
-void sub_807F49C(void)
+//------------------------------------------------------------------------------
+// Fog 2
+//------------------------------------------------------------------------------
+
+void Fog2_Main(void);
+static void CreateFog2Sprites(void);
+static void DestroyFog2Sprites(void);
+
+void Fog2_InitVars(void)
 {
-    gWeatherPtr->unknown_6CC = 0;
-    gWeatherPtr->unknown_6D2 = 0;
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
     gWeatherPtr->unknown_6C1 = 0;
     gWeatherPtr->unknown_6C2 = 20;
     if (gWeatherPtr->unknown_6FB == 0)
     {
         gWeatherPtr->unknown_6F0 = 0;
         gWeatherPtr->unknown_6F2 = 0;
-        gWeatherPtr->unknown_6EE = 0;
-        sub_807DB64(0, 16);
+        gWeatherPtr->fog2ScrollPosX = 0;
+        Weather_SetBlendCoeffs(0, 16);
     }
 }
 
-void sub_807F52C(void);
-
-void sub_807F4FC(void)
+void Fog2_InitAll(void)
 {
-    sub_807F49C();
-    while (gWeatherPtr->unknown_6D2 == 0)
-        sub_807F52C();
+    Fog2_InitVars();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        Fog2_Main();
 }
 
-void sub_807F6E8(void);
-
-void sub_807F52C(void)
+void Fog2_Main(void)
 {
-    gWeatherPtr->unknown_6EE = (gSpriteCoordOffsetX - gWeatherPtr->unknown_6F2) & 0xFF;
+    gWeatherPtr->fog2ScrollPosX = (gSpriteCoordOffsetX - gWeatherPtr->unknown_6F2) & 0xFF;
     if (++gWeatherPtr->unknown_6F0 > 3)
     {
         gWeatherPtr->unknown_6F0 = 0;
         gWeatherPtr->unknown_6F2++;
     }
-    switch (gWeatherPtr->unknown_6CC)
+    switch (gWeatherPtr->initStep)
     {
     case 0:
-        sub_807F6E8();
-        if (gWeatherPtr->currWeather == 6)
-            sub_807DBA4(12, 8, 3);
+        CreateFog2Sprites();
+        if (gWeatherPtr->currWeather == WEATHER_FOG_2)
+            Weather_SetTargetBlendCoeffs(12, 8, 3);
         else
-            sub_807DBA4(4, 16, 0);
-        gWeatherPtr->unknown_6CC++;
+            Weather_SetTargetBlendCoeffs(4, 16, 0);
+        gWeatherPtr->initStep++;
         break;
     case 1:
-        if (sub_807DBE8())
+        if (Weather_UpdateBlend())
         {
-            gWeatherPtr->unknown_6D2 = 1;
-            gWeatherPtr->unknown_6CC++;
+            gWeatherPtr->weatherGfxLoaded = TRUE;
+            gWeatherPtr->initStep++;
         }
         break;
     }
 }
 
-void sub_807F7A4(void);
-
-bool8 sub_807F5EC(void)
+bool8 Fog2_Finish(void)
 {
-    gWeatherPtr->unknown_6EE = (gSpriteCoordOffsetX - gWeatherPtr->unknown_6F2) & 0xFF;
+    gWeatherPtr->fog2ScrollPosX = (gSpriteCoordOffsetX - gWeatherPtr->unknown_6F2) & 0xFF;
     if (++gWeatherPtr->unknown_6F0 > 3)
     {
         gWeatherPtr->unknown_6F0 = 0;
@@ -1481,16 +1343,16 @@ bool8 sub_807F5EC(void)
     switch (gWeatherPtr->unknown_6CE)
     {
     case 0:
-        sub_807DBA4(0, 16, 3);
+        Weather_SetTargetBlendCoeffs(0, 16, 3);
         gWeatherPtr->unknown_6CE++;
         break;
     case 1:
-        if (!sub_807DBE8())
+        if (!Weather_UpdateBlend())
             break;
         gWeatherPtr->unknown_6CE++;
         break;
     case 2:
-        sub_807F7A4();
+        DestroyFog2Sprites();
         gWeatherPtr->unknown_6CE++;
         break;
     default:
@@ -1499,13 +1361,289 @@ bool8 sub_807F5EC(void)
     return TRUE;
 }
 
-void sub_807F688(struct Sprite *sprite)
+#define sprColumn data[0]
+
+static void Fog2SpriteCallback(struct Sprite *sprite)
 {
     sprite->pos2.y = (u8)gSpriteCoordOffsetY;
-    sprite->pos1.x = gWeatherPtr->unknown_6EE + 32 + sprite->data[0] * 64;
+    sprite->pos1.x = gWeatherPtr->fog2ScrollPosX + 32 + sprite->sprColumn * 64;
     if (sprite->pos1.x > 0x10F)
     {
-        sprite->pos1.x = 480 + gWeatherPtr->unknown_6EE - (4 - sprite->data[0]) * 64;
+        sprite->pos1.x = 480 + gWeatherPtr->fog2ScrollPosX - (4 - sprite->sprColumn) * 64;
         sprite->pos1.x &= 0x1FF;
     }
 }
+
+static void CreateFog2Sprites(void)
+{
+    u16 i;
+
+    if (gWeatherPtr->unknown_6FB == 0)
+    {
+        struct SpriteSheet fog2SpriteSheet = {gWeatherFog2Tiles, sizeof(gWeatherFog2Tiles), 0x1201};
+
+        LoadSpriteSheet(&fog2SpriteSheet);
+        for (i = 0; i < 20; i++)
+        {
+            u8 spriteId = CreateSpriteAtEnd(&sFog2SpriteTemplate, 0, 0, 0xFF);
+
+            if (spriteId != MAX_SPRITES)
+            {
+                struct Sprite *sprite = &gSprites[spriteId];
+
+                sprite->sprColumn = i % 5;
+                sprite->pos1.x = (i % 5) * 64 + 32;
+                sprite->pos1.y = (i / 5) * 64 + 32;
+                ((struct Weather2 *)gWeatherPtr)->fogSprites[i] = sprite;
+            }
+            else
+            {
+                ((struct Weather2 *)gWeatherPtr)->fogSprites[i] = NULL;
+            }
+        }
+        gWeatherPtr->unknown_6FB = 1;
+    }
+}
+
+#undef sprColumn
+
+static void DestroyFog2Sprites(void)
+{
+    u16 i;
+
+    if (gWeatherPtr->unknown_6FB != 0)
+    {
+        for (i = 0; i < 20; i++)
+        {
+            if (((struct Weather2 *)gWeatherPtr)->fogSprites[i] != NULL)
+                DestroySprite(((struct Weather2 *)gWeatherPtr)->fogSprites[i]);
+        }
+        FreeSpriteTilesByTag(0x1201);
+        gWeatherPtr->unknown_6FB = 0;
+    }
+}
+
+//------------------------------------------------------------------------------
+// Fog 1
+//------------------------------------------------------------------------------
+
+void Fog1_InitVars(void)
+{
+    gWeatherPtr->initStep = 0;
+    gWeatherPtr->weatherGfxLoaded = FALSE;
+    gWeatherPtr->unknown_6C1 = 0;
+    gWeatherPtr->unknown_6C2 = 20;
+    gWeatherPtr->unknown_6FE = 20;
+    if (gWeatherPtr->unknown_700 == 0)
+    {
+        Weather_SetBlendCoeffs(0, 16);
+        REG_BLDALPHA = BLDALPHA_BLEND(64, 63);  // Those aren't even valid coefficients!
+    }
+}
+
+void sub_807F888(void);
+
+void sub_807F858(void)
+{
+    Fog1_InitVars();
+    while (gWeatherPtr->weatherGfxLoaded == FALSE)
+        sub_807F888();
+}
+
+void sub_807F99C(void);
+void sub_807F9AC(void);
+
+void sub_807F888(void)
+{
+    gWeatherPtr->unknown_6FC = gSpriteCoordOffsetX & 0x1FF;
+    while (gWeatherPtr->unknown_6FC > 0xEF)
+        gWeatherPtr->unknown_6FC -= 0xF0;
+    switch (gWeatherPtr->initStep)
+    {
+    case 0:
+        sub_807F99C();
+        gWeatherPtr->initStep++;
+        break;
+    case 1:
+        if (gWeatherPtr->unknown_700 == 0)
+            sub_807F9AC();
+        Weather_SetTargetBlendCoeffs(16, 0, 1);
+        gWeatherPtr->initStep++;
+        break;
+    case 2:
+        if (!Weather_UpdateBlend())
+            break;
+        gWeatherPtr->weatherGfxLoaded = TRUE;
+        gWeatherPtr->initStep++;
+        break;
+    default:
+        Weather_UpdateBlend();
+        break;
+    }
+}
+
+void sub_807FA54(void);
+
+bool8 sub_807F934(void)
+{
+    switch (gWeatherPtr->unknown_6CE)
+    {
+    case 0:
+        Weather_SetTargetBlendCoeffs(0, 16, 1);
+        gWeatherPtr->unknown_6CE++;
+        break;
+    case 1:
+        if (!Weather_UpdateBlend())
+            break;
+        sub_807FA54();
+        gWeatherPtr->unknown_6CE++;
+        break;
+    case 2:
+        REG_BLDALPHA = 0;
+        gWeatherPtr->unknown_6CE++;
+        return FALSE;
+    default:
+        return FALSE;
+    }
+    return TRUE;
+}
+
+const struct SpriteSheet gWeatherAshSpriteSheet = {gWeatherAshTiles, sizeof(gWeatherAshTiles), 0x1202};
+
+void sub_807F99C(void)
+{
+    LoadSpriteSheet(&gWeatherAshSpriteSheet);
+}
+
+const struct OamData gOamData_839ABB8 =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 1,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 3,
+    .tileNum = 0,
+    .priority = 1,
+    .paletteNum = 15,
+    .affineParam = 0,
+};
+
+const union AnimCmd gSpriteAnim_839ABC0[] =
+{
+    ANIMCMD_FRAME(0, 60),
+    ANIMCMD_FRAME(64, 60),
+    ANIMCMD_JUMP(0),
+};
+
+const union AnimCmd *const gSpriteAnimTable_839ABCC[] =
+{
+    gSpriteAnim_839ABC0,
+};
+
+void sub_807FAA8(struct Sprite *);
+const struct SpriteTemplate gSpriteTemplate_839ABD0 =
+{
+    .tileTag = 4610,
+    .paletteTag = 4608,
+    .oam = &gOamData_839ABB8,
+    .anims = gSpriteAnimTable_839ABCC,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = sub_807FAA8,
+};
+
+const struct SpriteSheet gWeatherFog1SpriteSheet = {gWeatherFog1Tiles, sizeof(gWeatherFog1Tiles), 0x1203};
+
+const struct OamData gOamData_839ABF0 =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 1,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 3,
+    .tileNum = 0,
+    .priority = 2,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+const union AnimCmd gSpriteAnim_839ABF8[] =
+{
+    ANIMCMD_FRAME(0, 16),
+    ANIMCMD_END,
+};
+
+const union AnimCmd *const gSpriteAnimTable_839AC00[] =
+{
+    gSpriteAnim_839ABF8,
+};
+
+void sub_807FE3C(struct Sprite *);
+const struct SpriteTemplate gSpriteTemplate_839AC04 =
+{
+    .tileTag = 4611,
+    .paletteTag = 4608,
+    .oam = &gOamData_839ABF0,
+    .anims = gSpriteAnimTable_839AC00,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = sub_807FE3C,
+};
+
+const struct OamData gOamData_839AC1C =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 1,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 3,
+    .tileNum = 0,
+    .priority = 1,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+const union AnimCmd gSpriteAnim_839AC24[] =
+{
+    ANIMCMD_FRAME(0, 3),
+    ANIMCMD_END,
+};
+
+const union AnimCmd gSpriteAnim_839AC2C[] =
+{
+    ANIMCMD_FRAME(64, 3),
+    ANIMCMD_END,
+};
+
+const union AnimCmd *const gSpriteAnimTable_839AC34[] =
+{
+    gSpriteAnim_839AC24,
+    gSpriteAnim_839AC2C,
+};
+
+void sub_8080338(struct Sprite *);
+const struct SpriteTemplate gSpriteTemplate_839AC3C =
+{
+    .tileTag = 4612,
+    .paletteTag = 4609,
+    .oam = &gOamData_839AC1C,
+    .anims = gSpriteAnimTable_839AC34,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = sub_8080338,
+};
+
+const struct SpriteSheet gWeatherSandstormSpriteSheet = {gWeatherSandstormTiles, sizeof(gWeatherSandstormTiles), 0x1204};
+
diff --git a/src/field/overworld.c b/src/field/overworld.c
index 59aac5c33..387745f94 100644
--- a/src/field/overworld.c
+++ b/src/field/overworld.c
@@ -1737,7 +1737,7 @@ void sub_8054D4C(u32 a1)
     sub_805C7C4(0);
     FieldEffectActiveListClear();
     InitFieldMessageBox();
-    sub_807C828();
+    StartWeather();
     sub_8080750();
     if (!a1)
         SetUpFieldTasks();