As already mentioned, around these parts we're familiar with severe weather taking form as flooding. Several audio files allow the visitor to hear the actual storms shown in the dazzling accompanying photographs. On the more practical side there is FEMA.gov , home of the Federal Emergency Management Agency. The emphasis of this site is on news and preparedness, but customizable Hazard Maps organized by zip code for floods, earthquakes, hail, hurricanes, tornadoes, and wind storms add a unique element. The maps are zoomable and emailable, should you wish to impress your friends.
Pleasant weather makes for good conversation fodder too.
There's a lot to be said for sunny days with clear skies. Or cloudy skies, if you've ever spent an hour on your back watching the sky form ever-shifting dogs and ponies and faces out of its cotton candy. Large URL for a large site. Actually seeing examples of stratocumulus and cumulonimbus will make your dogs, ponies, and faces that much more exciting. Some people look up at the clouds, but others look down upon them.