This is a collection of links to sites I refer to often. Many of these are sites specific to the Milwaukee, Wisconsin area; but some may be relevant to your location. I hope you find these as useful as I do.
Curt Blank's Milwaukee Weather Report. Lots of data.
Animated geostationary satellite images. of the North American Middle West.
National Weather Service Radar Loop for Milwaukee.
National Weather Service
National Weather Service Milwaukee 7 day forecast, current conditions, satellite and radar images.