Weather Dictionary / Glossary of Terms

Excessive Heat Warning


   Weather TermDescription / Definition
   Excessive Heat Warning Issued within 12 hours of the onset of the following criteria: heat index of at least 105°F for more than 3 hours per day for 2 consecutive days, or heat index more than 115°F for any period of time.


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Data courtesy of NOAA - National Oceanic and Atmospheric Administration