Volcanoes 101 . Site map . The first weather satellite, launched 40 years ago, changed everything. By putting together the rings of one live tree and one dead tree, climatologists can see more than 10,000 years back in time. Just ask David Johnson.
Study shows more hurricanes hit U.S. in past millennia.
Raindrops on the ocean slap or ring, sounds that reveal much about a storm. A catastrophic dry period could be on the way, researchers say. Heavy snow and ice spell danger when temperatures warm up. The Ohio River all jammed up in 1918. The TRMM satellite measures latent heat in a storm, critical to forecasting development.