Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. Read More >

Forecast Maximum Heat Index for Day 1

Heat Related Watch/Warning/Advisory Criteria

The National Weather Service in Tampa Bay issues heat related Watch, Warning, and Advisory statements when the following criteria are forecast:

Excessive Heat Warning - issued for day 1, possibly day 2, when daytime Heat Index values are expected to reach or exceed 113 degrees Fahrenheit
Excessive Heat Watch - issued for days 2 or 3 when daytime Heat Index values could reach or exceed 113 degrees Fahrenheit
Heat Advisory - issued for day 1, possibly day 2, when daytime Heat Index values are expected to be between 108 and 112 degrees Fahrenheit

The images below are the official NWS heat index forecast in degrees Fahrenheit for the next 7 days. These heat indices are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

These graphics are updated at least twice per day, around 4:15 AM/4:15 PM.
They can be magnified (enlarged) by left clicking on them, and resized back to original size with a second click.

	TBW CWA	Nature Coast	West Central	Southwest
Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Other graphics like these, including forecast High Temperature, Low Temperature, and Rainfall are available within our Probabilistic DSS web page.

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Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Daily Heat Index