diff --git a/include/constants/flags.h b/include/constants/flags.h
index b7388d6bd0..4863c0980a 100644
--- a/include/constants/flags.h
+++ b/include/constants/flags.h
@@ -1397,6 +1397,7 @@
 
 #define FLAG_SYS_USE_FLASH                          (SYSTEM_FLAGS + 0x28)
 #define FLAG_SYS_USE_STRENGTH                       (SYSTEM_FLAGS + 0x29)
+// Sets abnormal weather on maps that check for it
 #define FLAG_SYS_WEATHER_CTRL                       (SYSTEM_FLAGS + 0x2A)
 #define FLAG_SYS_CYCLING_ROAD                       (SYSTEM_FLAGS + 0x2B)
 #define FLAG_SYS_SAFARI_MODE                        (SYSTEM_FLAGS + 0x2C)
diff --git a/include/follower_helper.h b/include/follower_helper.h
index 4d316ba1a3..e5787de5c7 100644
--- a/include/follower_helper.h
+++ b/include/follower_helper.h
@@ -62,7 +62,8 @@ struct FollowerMsgInfoExtended {
 #define MATCH_U16(type, value1, value2) {type, {.split = {.hw = value1, .b = value2}}}
 #define MATCH_U8(type, v1, v2, v3) {type, {.bytes = {v1, v2, v3}}}
 
-#define MATCH_SPECIES(species) MATCH_U24(MSG_COND_SPECIES, species)
+#define MATCH_SPECIES(species) MATCH_U16(MSG_COND_SPECIES, species, 0)
+#define MATCH_NOT_SPECIES(species) MATCH_U16(MSG_COND_SPECIES, species, 1)
 #define MATCH_TYPES(type1, type2) MATCH_U8(MSG_COND_TYPE, type1, type2, 0)
 // Checks that follower has *neither* of the two types
 #define MATCH_NOT_TYPES(type1, type2) MATCH_U8(MSG_COND_TYPE, type1, type2, TYPE_NONE | 1)
@@ -107,6 +108,7 @@ enum {
     COND_MSG_LEAVES,
     COND_MSG_ICE,
     COND_MSG_BURN,
+    COND_MSG_ABNORMAL_WEATHER,
     COND_MSG_COUNT,
 };
 
diff --git a/src/event_object_movement.c b/src/event_object_movement.c
index e0bc0619ae..630e3dffb3 100644
--- a/src/event_object_movement.c
+++ b/src/event_object_movement.c
@@ -2125,7 +2125,12 @@ bool32 CheckMsgCondition(const struct MsgCondition *cond, struct Pokemon *mon, u
     switch (cond->type)
     {
     case MSG_COND_SPECIES:
-        return (cond->data.raw == species);
+        multi = cond->data.split.hw;
+        // if byte nonzero, invert; check != species!
+        if (cond->data.split.b)
+            return (cond->data.split.hw != species);
+        else
+            return (cond->data.split.hw == species);
     case MSG_COND_TYPE:
         multi = (SpeciesHasType(species, cond->data.bytes[0]) ||
                  SpeciesHasType(species, cond->data.bytes[1]));
diff --git a/src/follower_helper.c b/src/follower_helper.c
index be52877c5f..3df1cfa0a9 100644
--- a/src/follower_helper.c
+++ b/src/follower_helper.c
@@ -65,6 +65,7 @@ static const u8 sCondMsg40[] = _("{STR_VAR_1} is gnawing at the ice.");
 static const u8 sCondMsg41[] = _("{STR_VAR_1} is touching the ice.");
 static const u8* const sIceTexts[] = {sCondMsg26, sCondMsg40, sCondMsg41, NULL};
 static const u8 sCondMsg42[] = _("{STR_VAR_1}'s burn looks painful!");
+static const u8 sCondMsg50[] = _("{STR_VAR_1} is disturbed by the\nabnormal weather!");
 
 // See the struct definition in follower_helper.h for more info
 const struct FollowerMsgInfoExtended gFollowerConditionalMessages[COND_MSG_COUNT] = {
@@ -276,6 +277,17 @@ const struct FollowerMsgInfoExtended gFollowerConditionalMessages[COND_MSG_COUNT
     .emotion = FOLLOWER_EMOTION_SAD,
     .conditions = {MATCH_STATUS(STATUS1_BURN)},
     },
+    [COND_MSG_ABNORMAL_WEATHER] =
+    {
+    .text = sCondMsg50,
+    .emotion = FOLLOWER_EMOTION_SURPRISE,
+    .conditions = {
+        MATCH_MUSIC(MUS_ABNORMAL_WEATHER),
+        MATCH_NOT_SPECIES(SPECIES_KYOGRE),
+        MATCH_NOT_SPECIES(SPECIES_GROUDON),
+        MATCH_NOT_SPECIES(SPECIES_RAYQUAZA),
+    }
+    },
 };
 
 // Pool of "unconditional" follower messages