US Government sites:

<URL:http://hypatia.gsfc.nasa.gov/NASA_homepage.html>
  NASA system-wide home page

<URL:http://climate.gsfc.nasa.gov/>
  NASA Goddard Climate and Radiation Branch 

<URL:http://www.noaa.gov>
  National Oceanic and Atmospheric Administration (NOAA)

<URL:http://www.nws.noaa.gov>
  National Weather Service

<URL:http://www.erl.noaa.gov>
  NOAA Environmental Research Laboratories

<URL:http://www.etl.noaa.gov>
  NOAA Environmental Technology Laboratory

<URL:http://ns.noaa.gov/NESDIS/NESDIS_Home.html>
  NESDIS (National Environmental Satellite, Data, and Information Service)

<URL:http://www.nohrsc.nws.gov>
  National Operational Hydrologic Remote Sensing Center

<URL:http://www.nssl.ou.edu>
  National Severe Storms Laboratory 

<URL:http://www.epa.gov>
  Environmental Protection Agency (EPA)

Regional Climate Centers:

<URL:http://climate.sage.dri.edu>
  Western RCC

<URL:http://met-www.cit.cornell.edu/nrcc_home.html>
  Northeast RCC

<URL:http://sercc.dnr.state.sc.us/sercc.html>
  Southeast RCC

<URL:http://maestro.srcc.lsu.edu/srcc.html>
  Southern RCC

<URL:http://hpccsun.unl.edu/>
  High Plains RCC

Other institutions:

<URL:http://www.fnoc.navy.mil>
  Fleet Numerical Oceanography Center

<URL:http://grads.iges.org>
  Center for Ocean-Land-Atmosphere Studies (COLA)

<URL:http://wwwcaps.ou.edu>
  Center for Analysis and Prediction of Storms (CAPS) 

<URL:http://www.whoi.edu/>
  Woods Hole Oceanographic Institution

<URL:http://www.water.ca.gov>
  California Department of Water Resources home page

<URL:http://www.gcrio.org/>
  U.S. Global Change Research Information Office (GCRIO)

<URL:http://cires.colorado.edu>
  Cooperative Institute for Research in Environmental Sciences (CIRES)

<URL:http://www.cira.colostate.edu>
  Cooperative Institute for Research in the Atmosphere (CIRA)

<URL:http://www-pcmdi.llnl.gov>
  Program for Climate Model Diagnosis & Intercomparison (PCMDI) of the 
Lawrence Livermore National Laboratory (LLNL)

<URL:http://www.ametsoc.org/AMS>
<URL:gopher://atm.geo.nsf.gov/11/AMS>
  American Meteorological Society

<URL:http://www.agu.org/> 
  American Geophysical Union

<URL:http://vortex.weather.brockport.edu>
  Department of Earth Sciences at the State University of New York at Brockport

<URL:http://meteor.atms.purdue.edu>
  Purdue University Dept. of Earth and Atmospheric Science