National Weather Service
National Weather Service:climate Prediction Center: Daily Precipitation Analysis
Find real-time daily precipitation analysis for the United States, Mexico, and South America as well as accumulated precipitation maps for the past 30 or 90 days.
Dan Satterfield
Dan's Wild Weather Page: Forecasting
Find out about the art and science of forecasting at this site from Dan's Wild Weather Page.
ClassFlow
Class Flow: Tornados in the Us
[Free Registration/Login Required] Overview: In this lesson, students will learn the basics about how tornadoes are formed, and when and where they are most likely to occur. They will learn that the United States is the country most...
University of California
Earthguide: El Nino: Illustrating the Concept
Do you know what happens during a typical El Nino? This overview provides a description, characteristics, and animated maps showing sea surface temperature changes during past El Nino events.