Weather
The Daily Planet - Meteorological maps, satellite images, and pointers to sources of climatic data.
Intellicast - International weather, radar tracking and half hourly satellite feeds.
National severe storms laboratory - storm chasing enthusiates
World Climate - weather predictions for the next 12 months
World Meteorological Organization - UN division that moniters global climate
World Weather - Forcasts, charts, storm warnings, allergy reports, satellite photos and more for thousands of cities worldwide.