Interactive Weather Browser

http://rs560.cl.msu.edu/weather/interactive.html

Interactive temperature map of the USA giving detailed hourly updated weather reports.

National Servere Storms Laboratory

http://www.nssl.uoknor.edu/

If tornadoes, blizzards, flash floods, thunderstorms, hurricanes, cyclones, lightning, and servere storms are just you bag, step in here. These guys are not put off by a bit of drizzle spoiling their cricket, they're out whipping up lightning rods on mountain peaks, trying to attract the big stuff. If you're a thunder buff, read the advice on responsible storm chasing. it may just temper that Pavlovian frenzy for the car keys the next time a distant rumble snaps you from your post-prandial stupor.

The Daily Planet

http://www.atmos.uiuc.edu/

Meteorological maps, satellite images, and pointers to sources of climatic data, courtesy of the University of Illinois Department of Atmospheric Sciences.

Weather

http://www.cs.ucl.ac.uk/misc/weather/weather.html

Of the many good reasons to live in the UK, here's evidence that the weather isn't one.

Weather Information

http://web.nexor.co.uk/users/jpo/weather/weather.html

Regularly updated weather and satellite images from all over the world, particularly Europe and the UK.

World Meteorological Organisation

http://www.wmo.ch

Division of the U.n. responsible for monitoring global climate. Link to national bureaus world-wide.