java.lang.NullPointerException: Unexpected error
at weather2.client.SceneEnhancer.getRainStrengthAndControlVisuals(SceneEnhancer.java:426)
at weather2.EventHandlerFML.tickRenderScreen(EventHandlerFML.java:60)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_376_EventHandlerFML_tickRenderScreen_RenderTickEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at cpw.mods.fml.common.FMLCommonHandler.onRenderTickStart(FMLCommonHandler.java:335)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:999)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Hopefully fixed in bdd9f93 now