diff --git a/ambiance/build.gradle b/ambiance/build.gradle
index 5c4a53b..74f2cd8 100644
--- a/ambiance/build.gradle
+++ b/ambiance/build.gradle
@@ -265,6 +265,8 @@ tasks.register("verifyAmbiance") {
 			'class AmbianceEnvironmentController', 'enum AmbianceDailyWeather',
 			'enum AmbianceCloudCover', 'enum AmbianceLunarNight',
 			'id("environment_sync")', 'setRainLevel(weather.rainIntensity())',
+			'ClientboundGameEventPacket.RAIN_LEVEL_CHANGE',
+			'WEATHER_FADE_EPSILON',
 			'Math.multiplyExact(worldDay, MINECRAFT_DAY_TICKS)',
 			'class AmbianceEffects', 'class AmbianceBiomeTints',
 			'AmbianceShaderCompatibility.isShaderPackActive()', 'case LIGHT_RAIN -> 0.72F',
diff --git a/ambiance/src/main/java/fr/koka99cab/sanctuary26/ambiance/environment/AmbianceEnvironmentController.java b/ambiance/src/main/java/fr/koka99cab/sanctuary26/ambiance/environment/AmbianceEnvironmentController.java
index 50ceff3..be8b886 100644
--- a/ambiance/src/main/java/fr/koka99cab/sanctuary26/ambiance/environment/AmbianceEnvironmentController.java
+++ b/ambiance/src/main/java/fr/koka99cab/sanctuary26/ambiance/environment/AmbianceEnvironmentController.java
@@ -10,8 +10,10 @@ import java.util.IdentityHashMap;
 import java.util.Map;
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
+import net.minecraft.network.protocol.game.ClientboundGameEventPacket;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.players.PlayerList;
 import net.minecraft.util.RandomSource;
 import net.minecraft.world.level.saveddata.WeatherData;
 
@@ -22,6 +24,8 @@ import net.minecraft.world.level.saveddata.WeatherData;
  */
 public final class AmbianceEnvironmentController {
 	private static final int UPDATE_INTERVAL_TICKS = 20;
+	/** Vanilla fades rain and thunder by 0.01 per tick; stay above that so we do not snap. */
+	private static final float WEATHER_FADE_EPSILON = 0.012F;
 	private static final Map<MinecraftServer, TimedWeather> TIMED_WEATHER = new IdentityHashMap<>();
 	private static final Map<MinecraftServer, AmbianceLunarNight> LUNAR_OVERRIDES = new IdentityHashMap<>();
 	private static final Map<MinecraftServer, String> LAST_BROADCAST_WEATHER = new IdentityHashMap<>();
@@ -44,6 +48,8 @@ public final class AmbianceEnvironmentController {
 		ServerTickEvents.END_SERVER_TICK.register(server -> {
 			if (server.getTickCount() % UPDATE_INTERVAL_TICKS == 0) {
 				refresh(server);
+			} else {
+				applyWeather(server, effectiveWeather(server, AmbianceData.get(server)));
 			}
 		});
 	}
@@ -210,6 +216,9 @@ public final class AmbianceEnvironmentController {
 	}
 
 	private static void applyWeather(MinecraftServer server, AmbianceDailyWeather weather) {
+		float targetRain = weather.rainIntensity();
+		float targetThunder = weather.thunder() ? 1.0F : 0.0F;
+		PlayerList players = server.getPlayerList();
 		for (ServerLevel level : server.getAllLevels()) {
 			if (!level.canHaveWeather()) {
 				continue;
@@ -217,11 +226,37 @@ public final class AmbianceEnvironmentController {
 			WeatherData data = level.getWeatherData();
 			data.setClearWeatherTime(weather.raining() ? 0 : 2400);
 			data.setRainTime(weather.raining() ? 2400 : 0);
-			data.setRaining(weather.raining());
 			data.setThunderTime(weather.thunder() ? 2400 : 0);
-			data.setThundering(weather.thunder());
-			level.setRainLevel(weather.rainIntensity());
-			level.setThunderLevel(weather.thunder() ? 1.0F : 0.0F);
+			float currentRain = level.getRainLevel(1.0F);
+			float currentThunder = level.getThunderLevel(1.0F);
+			if (currentRain > targetRain + WEATHER_FADE_EPSILON) {
+				data.setRaining(false);
+			} else if (currentRain < targetRain - WEATHER_FADE_EPSILON) {
+				data.setRaining(true);
+			} else {
+				data.setRaining(weather.raining());
+				if (currentRain != targetRain) {
+					level.setRainLevel(weather.rainIntensity());
+					players.broadcastAll(
+						new ClientboundGameEventPacket(ClientboundGameEventPacket.RAIN_LEVEL_CHANGE, targetRain),
+						level.dimension()
+					);
+				}
+			}
+			if (currentThunder > targetThunder + WEATHER_FADE_EPSILON) {
+				data.setThundering(false);
+			} else if (currentThunder < targetThunder - WEATHER_FADE_EPSILON) {
+				data.setThundering(true);
+			} else {
+				data.setThundering(weather.thunder());
+				if (currentThunder != targetThunder) {
+					level.setThunderLevel(targetThunder);
+					players.broadcastAll(
+						new ClientboundGameEventPacket(ClientboundGameEventPacket.THUNDER_LEVEL_CHANGE, targetThunder),
+						level.dimension()
+					);
+				}
+			}
 		}
 	}
 
diff --git a/build.gradle b/build.gradle
index 5fe28f4..73f6113 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3592,6 +3592,7 @@ project(":anotherworld") {
 project(":ouch") {
 	dependencies {
 		implementation project(":anotherworld")
+		implementation project(":ambiance")
 		implementation project(":sanctuary")
 	}
 }
diff --git a/ouch/build.gradle b/ouch/build.gradle
index 5e073e6..805c8b2 100644
--- a/ouch/build.gradle
+++ b/ouch/build.gradle
@@ -23,6 +23,8 @@ tasks.register("verifyOuch") {
 		def itemRegistry = file("src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchItems.java").text
 		def creativeTab = file("src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchCreativeTab.java").text
 		def weatherRegistry = file("src/main/java/fr/koka99cab/sanctuary26/ouch/registry/OuchWeatherTnt.java").text
+		def weatherEntity = file("src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java").text
+		def manifest = new JsonSlurper().parse(file("src/main/resources/fabric.mod.json"))
 		if (!itemRegistry.contains("MIGRATED_WEAPONS = List.of(CREEPERLOCK, MITRAILLETTE, EXPULSEUR, ASPIRATEUR)")
 			|| !itemRegistry.contains("WEAPONS = List.of(CREEPERLOCK, MITRAILLETTE, EXPULSEUR, ASPIRATEUR, MINING_RIFLE, BETA_BOW)")
 			|| !creativeTab.contains('OuchMod.id("arsenal")')
@@ -35,11 +37,16 @@ tasks.register("verifyOuch") {
 			|| !weatherRegistry.contains('OuchMod.id("weather_tnt")')
 			|| !weatherRegistry.contains('Identifier.fromNamespaceAndPath("redstoner", "weather_tnt")')
 			|| !weatherRegistry.contains('Identifier.fromNamespaceAndPath("weather_tnt", "weather_tnt")')
+			|| !weatherEntity.contains("AmbianceEnvironmentController.setWeatherForDuration")
+			|| !weatherEntity.contains("AmbianceDailyWeather.CLEAR")
+			|| !weatherEntity.contains("CLEAR_WEATHER_TICKS = 864_000")
+			|| weatherEntity.contains("setWeatherParameters")
+			|| manifest.depends?.ambiance != "*"
 			|| !file("src/main/resources/assets/ouch/blockstates/weather_tnt.json").isFile()
 			|| !file("src/main/resources/assets/ouch/items/weather_tnt.json").isFile()
 			|| !file("src/main/resources/data/ouch/loot_table/blocks/weather_tnt.json").isFile()
 			|| !file("src/main/resources/data/ouch/recipe/weather_tnt.json").isFile()) {
-			throw new GradleException("Ouch must own Weather TNT and preserve both historical aliases")
+			throw new GradleException("Ouch must own Weather TNT, clear Ambiance rain for twelve hours, and preserve both historical aliases")
 		}
 
 		if (!itemRegistry.contains('register("mining_rifle", properties -> new MiningRifleItem(properties.durability(640).enchantable(14)))')) {
diff --git a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java
index bd2aba6..0e13267 100644
--- a/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java
+++ b/ouch/src/main/java/fr/koka99cab/sanctuary26/ouch/entity/WeatherTntEntity.java
@@ -1,5 +1,7 @@
 package fr.koka99cab.sanctuary26.ouch.entity;
 
+import fr.koka99cab.sanctuary26.ambiance.environment.AmbianceDailyWeather;
+import fr.koka99cab.sanctuary26.ambiance.environment.AmbianceEnvironmentController;
 import fr.koka99cab.sanctuary26.ouch.registry.OuchWeatherTnt;
 import net.minecraft.core.particles.DustParticleOptions;
 import net.minecraft.core.particles.ParticleTypes;
@@ -16,7 +18,7 @@ import net.minecraft.world.phys.Vec3;
 
 public class WeatherTntEntity extends PrimedTnt {
 	public static final int DEFAULT_FUSE_TICKS = 60;
-	private static final int CLEAR_WEATHER_TICKS = 72_000;
+	private static final int CLEAR_WEATHER_TICKS = 864_000;
 	private static final double LAUNCH_SPEED = 0.56D;
 	private static final DustParticleOptions BLUE_DUST = new DustParticleOptions(0x44A6FF, 1.35F);
 
@@ -82,7 +84,11 @@ public class WeatherTntEntity extends PrimedTnt {
 	private void detonate(ServerLevel level) {
 		MinecraftServer server = level.getServer();
 		if (server != null) {
-			server.setWeatherParameters(CLEAR_WEATHER_TICKS, 0, false, false);
+			AmbianceEnvironmentController.setWeatherForDuration(
+				server,
+				AmbianceDailyWeather.CLEAR,
+				CLEAR_WEATHER_TICKS
+			);
 		}
 
 		level.setSkyFlashTime(2);
diff --git a/ouch/src/main/resources/fabric.mod.json b/ouch/src/main/resources/fabric.mod.json
index 82b5730..7e07d36 100644
--- a/ouch/src/main/resources/fabric.mod.json
+++ b/ouch/src/main/resources/fabric.mod.json
@@ -24,6 +24,7 @@
 		"java": ">=25",
 		"fabric-api": ">=0.154.2+26.2",
 		"anotherworld": ">=0.0.0-alpha.46",
+		"ambiance": "*",
 		"sanctuary": ">=0.0.0-alpha.110"
 	},
 	"custom": {