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Global Forecast System
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<p>The Global Forecast System (GFS) is a global <a href="/facts/Numerical_weather_prediction/TXdbEfE4">numerical weather prediction</a> system containing a global <a href="/facts/Computer_model/Re6o8vzN">computer model</a> and variational <a href="/facts/Data_assimilation/8E2Mb5of">analysis</a> run by the <a href="/facts/United_States/P0sCdLe5">United States'</a> <a href="/facts/National_Weather_Service/gcWCQRzr">National Weather Service</a> (NWS). </p>