diff --git a/src/fxmaster.js b/src/fxmaster.js
index c965291a..7e32150b 100644
--- a/src/fxmaster.js
+++ b/src/fxmaster.js
@@ -102,6 +102,7 @@ Hooks.once("init", function () {
     ]),
   );
 
+  CONFIG.originalWeatherEffects = CONFIG.weatherEffects;
   CONFIG.weatherEffects = { ...CONFIG.weatherEffects, ...weatherEffects };
 });
 
diff --git a/src/migration/world/4.js b/src/migration/world/4.js
new file mode 100644
index 00000000..9447da7f
--- /dev/null
+++ b/src/migration/world/4.js
@@ -0,0 +1,21 @@
+import { migrate } from "../helpers";
+
+export async function migrate4() {
+  return migrate(migrationConfiguration4);
+}
+
+/** @type {import('../helpers').MigrationConfiguration} */
+export const migrationConfiguration4 = {
+  Scene: migrateScene,
+};
+
+async function migrateScene(scene) {
+  const originalWeatherEffectKeys = Object.keys(CONFIG.originalWeatherEffects);
+  const weatherEffectsToMigrate = Object.keys(CONFIG.fxmaster.particleEffects).filter(
+    (effect) => !originalWeatherEffectKeys.includes(effect), // only migrate effects where we are certain they are ours
+  );
+
+  if (weatherEffectsToMigrate.includes(scene.weather)) {
+    await scene.update({ weather: `fxmaster.${scene.weather}` });
+  }
+}
diff --git a/src/migration/world/migration.js b/src/migration/world/migration.js
index be357389..e1bc54b7 100644
--- a/src/migration/world/migration.js
+++ b/src/migration/world/migration.js
@@ -2,8 +2,9 @@
 import { packageId } from "../../constants.js";
 import { migrate2, migrationConfiguration2 } from "./2.js";
 import { migrate3, migrationConfiguration3 } from "./3.js";
+import { migrate4, migrationConfiguration4 } from "./4.js";
 
-export const targetServerMigration = 3;
+export const targetServerMigration = 4;
 
 export async function migrateWorld() {
   const migration = game.settings.get(packageId, "migration");
@@ -21,6 +22,8 @@ export async function migrateWorld() {
         isError |= await migrate2();
       case 2:
         isError |= await migrate3();
+      case 3:
+        isError |= await migrate4();
     }
 
     if (isError) {
@@ -46,4 +49,8 @@ export const worldMigrations = {
     migrate: migrate3,
     config: migrationConfiguration3,
   },
+  4: {
+    migrate: migrate4,
+    config: migrationConfiguration4,
+  },
 };