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High-Pressure System to Bring Above-Normal Heat to Southwest and Great Plains This Weekend
A strong high-pressure system will push temperatures 15 to 25 degrees above normal across large parts of the country, with the most extreme readings in the Southwest and northern plains. More than 90 local temperature records are expected to fall by Wednesday, two-thirds of them overnight lows.
Jul 11, 11:29 AM·1m read6 sources
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A strong high-pressure system will bring triple-digit highs to the Southwest and Great Plains this weekend before spreading eastward. Temperatures are forecast to run 15 to 25 degrees Fahrenheit above normal in many areas, including at night. Record triple-digit highs are expected this weekend in Nevada, Utah, Colorado, Wyoming, Idaho, Montana, North Dakota and South Dakota.
The National Weather Service in Las Vegas said the temperature there is expected to hit 111 F on Saturday. In Bismarck, North Dakota, readings will surpass 100 F until Tuesday, compared with typical summer values in the 80s, according to meteorologist Josh Adam. The National Weather Service predicts that more than 90 U.S.
Local temperature records will be tied or broken through Wednesday, two-thirds of them overnight heat records. Temperatures will not drop below 80 F at night in Fort Lauderdale, Miami, Tampa, Galveston and Charleston. Chad Merrill, a senior meteorologist with AccuWeather, said the current heat dome is one of the strongest to affect the Dakotas in 25 years.
Dry thunderstorms could develop in the Rockies, increasing fire risk in already dry areas. The current El Niño formed last month and has an 81 percent chance of becoming very strong by fall, the U.S. National Oceanic and Atmospheric Administration said Thursday.
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