Dangerous Heat will Affect 90% of US Bringing a Triple-Digit Heat Index

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A dangerous heatwave will send temperatures soaring over 90 degrees to over 90% of the US on Friday and a triple-digit heat index to many locations, with a severe weather and flooding risk to the upper Midwest.

Dangerous heat for Friday

Forecasters are warning that nearly 90 percent of the US population will be dealing with dangerous temperatures in excess of 90 degrees on Friday, including a triple-digit heat index in many locations. The heat is expected to continue through the weekend.

Heat index in the triple-digits

Starting from the nation’s midsection and extending into the southeast, many spots will be experiencing temperatures that will feel like triple-digit heat. Estimated heat indexes include:

Roswell 101, Wichita 107, Dallas 107, Lincoln 105, Oklahoma City 102, St. Louis 100, Shreveport 102, Jackson 101, Memphis 100, Montgomery 100, Tallahassee 100, Tampa 100, Columbia 110 Raleigh 99, CNN reports.

NWS excessive heat watches and advisories

The National Weather Service has issued excessive heat watches and heat advisories for the following locations on Friday.

Excessive heat watch: southern and southwestern Minnesota; northwestern Wisconsin; northwestern Iowa; New Jersey; Delaware; southern Pennsylvania.

Heat advisory: western North Dakota; the eastern half of South Dakota; Nebraska; northeastern and southeastern Kansas; central and eastern Oklahoma; north-central Texas; northwestern Arkansas; Missouri; Illinois; southern and southeastern Wisconsin; southeastern Minnesota; Northwest Iowa; northwestern Indiana; central Alabama.

Severe weather and flash flood warnings

The National Weather Service (NWS) has issued a warning of severe thunderstorms over the upper Midwest on Friday. The affected areas include nearly the entirety of North Dakota and Minnesota, north-central and east-central South Dakota and Northwestern Wisconsin.

The NWS is warning of heavy rain that will bring the risk of flash flooding over eastern North Dakota, throughout Minnesota and into West-central Wisconsin.

Continuing severe weather and the risk of flash flooding for the upper Midwest is forecast by the NWS for Saturday. Be sure to check local listings.

US weather forecast: July 17, 2020

West: San Francisco 66, partly cloudy; Los Angeles 81, partly cloudy; San Diego 76, partly cloudy; Reno 96, mostly sunny; Las Vegas 109, sunny; Salt Lake City 99, mostly sunny; Denver 95, mostly sunny.

Northwest & Northern Rockies: Seattle 69, cloudy; Medford 92, sunny; Boise 94, sunny; Billings 94, mostly sunny; Minot 86, thunderstorms; Rapid City 99, sunny; Cheyenne 91, partly cloudy.

Southwest: Phoenix 107, sunny; Tucson 98, partly cloudy; Albuquerque 94, partly cloudy; El Paso 101, partly cloudy; San Antonio 100, partly cloudy; Brownsville 96, partly cloudy.

Central & Upper Midwest: Lubbock 102, partly cloudy; Dallas 97, sunny; Oklahoma City 94, mostly sunny; Kansas City 95, partly cloudy; Minneapolis 90, partly cloudy; Madison 87, partly cloudy.

Ohio Valley: Chicago 89, mostly sunny; St. Louis 93, thunderstorms; Detroit 88, sunny; Cincinnati 91, mostly sunny; Indianapolis 90, mostly sunny.

South: Houston 87, thunderstorms; New Orleans 90, mostly sunny; Memphis 93, thunderstorms; Birmingham 96, partly cloudy; Atlanta 94, thunderstorms; Charlotte 93, thunderstorms; Jackson 90, partly cloudy; Tampa 94, thunderstorms; Miami 86, thunderstorms.

East: Norfolk 95, mostly sunny; Washington, D.C. 94, thunderstorms; Philadelphia 91, thunderstorms; Buffalo 80, partly cloudy; New York City 87, cloudy; Boston 74, cloudy; Caribou 66, rain.