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GFS Forecasting

This page displays different GFS maps (Global Forecast System). These forecasts are generated and uploaded 3-4 times per day when data is availible. Please note that the forecast maps are shown in UTC or Zulu time. New forecast maps are availible!

Choose type of map to show:

Note: These calculated forecast maps can depart significantly from actual weather.

WEATHER TRIVIA -  Weather TermsFlood Watch - Conditions are favorable for flash flooding in and close to the watch area. These watches are issued by the Weather Forecast Office in Chicago/Romeoville and are usually for the first 12 to 24 hours of a forecast.