Current surface conditions at Philadelphia International Airport (PHL) provided by NOAA

Current surface conditions at Washington D.C./Reagan National Airport (DCA) provided by NOAA

Current conditions for Central Park, New York, NY provided by NOAA

Current conditions for Huntsville Airport in Huntsville, AL provided by NOAA

Current surface conditions for Denver, Colorado provided by NOAA

Real-time national radar mosaic loop

Real-time radar of the Mid-Atlantic US (Credit College of DuPage)

Real-time radar of the Southeast US (Credit College of DuPage)

Real-time radar of the Western US (Credit College of DuPage)

Comprehensive meteorological data web site from Penn State Department of Meteorology

Regional gridded mesoanalysis data across the U.S. provided by NOAA's Storm Prediction Center (Norman, Oklahoma) 

Current and forecast information for oscillation indices including  AAO, AO, NAO, PNA provided by NOAA's Climate Prediction Center

Comprehensive info on tropical cyclones from the University of Wisconsin/Cooperative Institute for Meteorological Satellite Studies

Comprehensive meteorological data web site from the University of Wisconsin Department of Atmospheric Sciences

Comprehensive web site for satellite imagery from the University of Wisconsin