Intellicast
USA - World - Travel - Health - Almanac - Dr. Dewpoint - GOLFcast - Tropical -

The Weather Channel
Maps - U.S. Cities - International Forecasts - Travel - Breaking Weather -

WeatherNet
Forecasts - Maps - Radar-Sat - Travel - Tropical - Wx-Cams - Models -

USA Today Weather
U.S. Cities - World - Highways - Topics - Pilots - Teachers - Ski Reports -

The National Weather Service - NOAA
Data - Warnings - Forecast Products - National Centers - Climate Prediction Center -

CNN Weather
U.S. Cities - World - Maps - Storm Center -

Earth Watch
Forecasts - Sat & Radars - Current - StormWatch -

The Weather Underground

Also try "The Info Service - Weather Station"