NOAA Home Page: HQ site for all federal weather related information.
NOAA Weather/Tornado Page: Excellent site to research by anyone who does or doesn't live in the "Tornado Alley" region of the Central United States.
Interactive Weather Information Network: NOAA site for current radar/satellite images. Provides various active warnings and pertinent information.
National Weather Service - Omaha, NE: Home page for the NWS in Omaha, Nebraska and serves most of the Tri-State region.
UM Weather: Want to know the latest weather forecasts & check radar and satellite images too? They also provide LIVE Webcamera images from around the world.
Amateur Radio Links:
William Hepburn's TV & Radio DX Information Centre: Contains information for most of the radio spectrum for DX and DX related work.
William Hepburn's VHF/UHF Tropospheric Ducting Forecast: This page gives you a forecast to see how strong ducting will be in your area.