NASA and NOAA have put together a four-minute time-lapse animation of the 2009 hurricane season:
I find myself trying to peer beyond the bottom right corner, to see what's going on between the Caribbean and Africa.
At least as interesting as watching the tropical depressions form and move, though, are the way clouds form over Central America. I'd like to watch a time lapse of Panamanian skies from the ground below, based on this.
9 hours ago