National Weather Service (NOAA)
The National Weather Service provides weather, water, and climate data, forecasts and warnings for the protection of life and property and enhancement of the national economy.
The Weather Channel
Providing national and local weather forecast for cities, as well as weather radar, report and hurricane coverage.
Providing local and long range weather forecasts, weather reports, maps & tropical weather conditions for locations worldwide.
Wisconsin State Climatology Office
Affiliated with the Department of Atmospheric and Oceanic Sciences at the University of Wisconsin-Madison. Provides data for climate monitoring, to provide climate information to Wisconsin residents and government agencies.