links to archived data

surface analysis:

http://www.wpc.ncep.noaa.gov/html/sfc-zoom.php

http://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php

soundings:

http://www.spc.noaa.gov/exper/soundings/

http://www.spc.noaa.gov/exper/soundingclimo/

SPC mesoanalysis/severe events archive: (tons of maps: radar, satellite, surface, upper air, parameters for severe weather)

http://www.spc.noaa.gov/exper/ma_archive/

http://www.spc.noaa.gov/exper/archive/events/

NCAR image archive:

http://www2.mmm.ucar.edu/imagearchive/