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.
NOAA
Noaa: Cpc: Weekly Enso Update
Weekly updates on data collected and analyzed by the Climate Prediction Center. Includes sea surface temperature, subsurface tropical Pacific analyses and much more. Extensive site: check it out!