diff --git a/include/constants/flags.h b/include/constants/flags.h
index 71a9116728..47a3b245e1 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 54a2b4c12a..2960077696 100644
--- a/include/follower_helper.h
+++ b/include/follower_helper.h
@@ -70,7 +70,8 @@ enum MessageCondition
 #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)
@@ -118,6 +119,7 @@ enum ConditionalMessage
     COND_MSG_BURN,
     COND_MSG_DAY,
     COND_MSG_NIGHT,
+    COND_MSG_ABNORMAL_WEATHER,
     COND_MSG_COUNT,
 };
 
diff --git a/src/event_object_movement.c b/src/event_object_movement.c
index 361111ac4e..0c0d5b4694 100644
--- a/src/event_object_movement.c
+++ b/src/event_object_movement.c
@@ -2335,7 +2335,12 @@ 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 e85289d1f7..b3c80f0cf7 100644
--- a/src/follower_helper.c
+++ b/src/follower_helper.c
@@ -74,6 +74,7 @@ static const u8* const sDayTexts[] = {sCondMsg43, sCondMsg44, NULL};
 static const u8 sCondMsg45[] = _("Your POKéMON is staring spellbound\nat the night sky!");
 static const u8 sCondMsg46[] = _("Your POKéMON is happily gazing at\nthe beautiful, starry sky!");
 static const u8* const sNightTexts[] = {sCondMsg45, sCondMsg46, NULL};
+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] =
@@ -378,6 +379,18 @@ const struct FollowerMsgInfoExtended gFollowerConditionalMessages[COND_MSG_COUNT
             MATCH_TIME_OF_DAY(TIME_NIGHT),
         },
     },
+    [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