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Plunges of Cooler Temperatures Will End August in Central U.S. as Heat Wave Arrives in Parts of the West
Published: August 26, 2019
August will wrap up on a relatively cool note in parts of the central U.S., while a heat wave will take hold in parts of the West.
A southward dip in the jet stream, also known as a trough, will be in place over parts of the central and eastern U.S. this week. This pattern will allow a pair of cold fronts to push through parts of the Plains, Midwest and East.
The first cold front will make its way into the Plains and Midwest the first half of the week, and yet another cold front will bring a reinforcing shot of cooler air into these areas late in the week.
Meanwhile, high pressure aloft will build over the West, leading to above average temperatures, along with dry conditions.
Plains, Midwest, East Forecast
A cold front will push through the Plains and Midwest early this week. Many locations here will see temperatures 5 to 15 degrees cooler than average into midweek. Highs will be in the 60s and 70s with widespread lows in the 50s.
Another reinforcing shot of cool air will move into the Plains and upper Midwest late in the week, once again dropping temperatures several degrees below average.
(MAPS: 10-Day Forecast
NOAA's Climate Prediction Center highlights parts of the central Plains and Mississippi Valley as having the highest chance of cooler than average temperatures to end August and begin September.
Meanwhile, a heat wave will shift its epicenter from the southern High Plains to the Great Basin and Northwest.
Midland, Texas (108 degrees), and Roswell, New Mexico (109 degrees), set August temperature records Sunday. Monday, Midland may top 110 degrees for the first time on record in August.
High temperatures 5 to 15 degrees above average will stretch from western Texas into parts of the Northwest to start the week. This means highs in the 100s in parts of Texas, the Southwest and into portions of central California and southwestern Oregon.
A number of other daily record highs are likely early in the week from Texas into the Four Corners region.
By the middle of the week, Texas will finally see heat relief, but the heat will persist and intensify in the Pacific Northwest and Great Basin. Highs will climb well into the 90s in Portland, Oregon, and into the 80s in Seattle.
(MORE: Fall Temperature Outlook
While not as hot as earlier this week, generally warm temperatures are expected to persist in the Great Basin and Rockies as September begins.
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