Synopsis
Surface + Satellite (pilotwx)
IFR/MVFR cond.(wx channel)
IFR/MVFR cond.(AOPA members only)

Radar

Web Site VA U.S. AccuWX     Unisys     Intellicast     Lightning map (wx channel)

Current Weather

METAR trends: use "decoded" format (pilotwx)

NOTAMS
NOTAMS (FAA)

Advanced

DIFAX maps (accuwx)
GOES Satellite Icing Images (NOAA, experimental)

DUAT Briefing

Weather Home Pages

Free
Aviation Digital Data Service (ADDS)
Accuweather
Intellicast
Unisys
The Weather Channel
NOAA standard weather briefing

More wx links
Government wx links
AvWeb wx links

Landings wx links

Want more? Explore these:
Aviationweather.com
CNN Weather
WSI