On a gray, breezy day last September, thousands of people got in their cars and reluctantly left home. U.S. east coast highways were thick with traffic. Schools were closed. Businesses shut down. When powerful Hurricane Isabel arrived some 38 hours later, nearly everyone in the storm's path had fled to safety. Days later Vice Admiral Lautenbacher, in a briefing to President Bush, praised the National Oceanic and Atmospheric Administration (NOAA): "Without NOAA's excellent track forecasts, Hurricane Isabel's toll on lives and property would have been even more devastating. This is NOAA's first year of providing five-day forecasts--and the five-day forecast for Isabel was as good as our two-day forecasts have been over the last decade." Supercomputers. Satellites. Jet airplanes. Scientists. Programmers. Pilots. It took a big team using a lot of tools to predict where Isabel would go accurately and with time to spare. A suggestion for a related classroom game called Weather Challenge, a weather trivia game, is included.