There's a storm coming, Harry

Thanks to an article in the OMG Ubuntu blog I'm using the Real-time Sunlight Wallpaper. It updates my screen background every 30 minutes with a current satellite picture. Casually glancing at the background I saw this (around 1500GMT):

Hagrid would say " There's a storm coming, Harry" and if I'm not very wrong in my geography that one is heading toward Hawaii.