A GUIDE TO DEVELOPING A - Weather

Tropical Storm Watch. Using NHC wind fields for. guidance, will be issued when TS force sustained winds or gusts are possible. Wind Chill Watch WC Index ≤20 for 3 hours with sustained wind of 10 MPH or higher, over a widespread area (except Levy, Citrus, Sumter, Hernando where WC Index. ≤10). ................
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