TP to another world then /world 0 - Sky messes up

[dab]

Also, if you wanted the sky to stop flashing, and don't mind staying in a certain world the whole session, you can do /world time 12

Or whatever the command is.  That'll fix the sky until you go to another world.

Also, if an admin or mod fixes the weather, also fixes it. But all that does is resets the weather to 0.