Bernie B From Bernie Brauer Fri Apr 27 15:00:08 2007 Forgetting about altitude, here are the various speeds that the Earth's gaseous atmosphere would have at various latitudes at sea level if the Earth were rotating. This would create tremendous windstorms: 0 degrees, equator - 1038 mph 10 degrees - 1021 mph 20 degrees - 974 mph 30 degrees - 898 mph 40 degrees - 794 mph 50 degrees - 666 mph 60 degrees - 518 mph 70 degrees - 354 mph 80 degrees - 180 mph bb If the Earth were rotating, then, at the equator, its surface velocity would be 1038 mph. The atmosphere would also, from your data, be rotating at 1038 mph. (It hasn't been specified, but I'll state it here -- the motion will be in the same direction for both objects). I suggest that the conditions would be "Calm". A similar condition obtains at each of the latitudes you mention. Paul D Send instant messages to your online friends http://au.messenger.yahoo.com