Weather

This is not an exhaustive list (click below on "Machines" for that) but rather those sites I like best. There are redundant sites since sites are often busy (particularly during interesting weather) and because sites change all the time. My favorites are towards the top of each column or in bold, you might like some of the others better. The University of Illinios has some excellent Online Guides about weather info. In particular read the lessons on interpreting satellite and radar images as well as the one on interpreting surface observation symbols. There are also good instructions for using available data to make your own forecast.