A heat wave is coming to the central United States, with an extreme heat warning in Texas

A heat wave is coming to the central United States, with an extreme heat warning in Texas

Dueling heat waves — across Texas and the South, and from the Pacific Northwest to the northern Plains — are combining to deliver the hottest portion of this year's weather to the Central Plains and parts of the Midwest.

Extreme heat remains concentrated in Texas, as well as parts of surrounding states, after retreating in the Pacific Northwest following the passage of a cold front. . On Friday, more than 65 million People were under heat advisories, including in a large area centered on Missouri, where extreme heat watches are in effect from Saturday into next week as temperatures are set to rise starting this weekend.

Over the weekend, the expanding pulse of a high-pressure heat dome parked above the Southern Tier overtakes much of the central portion of the Lower 48 with record and near-record strength at its center. I'm just getting started.

“A significant heat wave is expected across much of the Midwest and extending across the central and southern Plains through about (next) Thursday,” the Weather Prediction Center wrote in a discussion Friday.

Under the heat dome, dozens of daily high marks are at risk, and some monthly readings may also fall or at all, including in places where heat records have already accumulated this summer.

Extreme heat overtakes the central United States

Thursday was the last day of extreme heat in the Northwest before a cold front passes. Record temperatures have been common since Sunday in the region, including a monthly record of 108 in Portland. Many other daily records were set in Texas and surrounding areas.

Temperatures will rise 15 to 20 degrees above average in the northern and central high plains on Friday. parts of montana, Dakota, Wyoming, then south to the central and southern Plains reaching or exceeding 100.

Rapid City in southwestern South Dakota is expected to reach 103 on Friday, threatening a record for that date. Places to the east of it may be 107 or so.

Continued anomalous heat will likely take hold in the Central Plains, Midwest, and into the South and Southeast. Widespread temperatures will likely exceed 100 degrees this weekend from Nebraska and Missouri south to the Gulf Coast.

Most locations in Texas will threaten records on Friday. Dallas is expected to reach 110, a new record for this date. Records are also at risk over the weekend, with temperatures ranging from 108 to 110 through Monday. Austin is expected to top 106, while Houston is close to 100.

On Saturday, about 4 dozen long-range locations could see record highs. Oklahoma City is expected to reach 106 on Saturday, with Wichita reaching 107. To the south, New Orleans again threatens to set records on Saturday, with expectations of a high of 100 there.

Once the extreme heat takes over, he won't loosen his grip much or at all during the week. Temperatures will continue near 100 and above through Thursday or Friday for many areas Same sites.

Record highs should tend to focus on the Midwest and South through midweek. Des Moines could be near a record high on Tuesday, with a forecast of 101. On Wednesday, Minneapolis is expected to be near 100 as well.

Incredibly, even on a week-long average, weather models indicate that temperatures could reach 15 degrees or more above average, representing brutal, unyielding heat.

Great heat, and widespread

After a short break in temperatures below 100 degrees in recent days, The high of 108 on Thursday set a record for that date in Dallas. Waco also reached 108, a record there.

It is possible to extend the extreme heat warning until Sunday in light of the forecast. Some good news for the area is that humidity may remain lower than in mid-summer. This means that heat index values ​​are close to or slightly above temperature in most areas.

Salina, in northeastern Kansas, could see at least a week of highs at 100 or higher according to most weather models, starting Saturday and continuing through at least Friday. If that happens, it will be the longest streak there since 2012. The Meteorological Service expects temperatures to reach 108 degrees on Saturday and Sunday.

“Models produce warmer low temperatures in 20-year model reanalysis for the weekend,” the Omaha Weather Service wrote.

Nearby and to the north from northern Kansas into Nebraska, Iowa and Missouri, humidity levels may also rise. This can be attributed in part to the vast farmland, much of it corn, which adds moisture to the air via “corn sweat.” The oscillating frontal area north of there also helps collect moisture.

In those areas, heat indexes could rise to 115 or even 120 under the right conditions, almost daily in some areas, from this weekend into next week.

By mid to late next week, temperatures will likely reach widespread temperatures around 100 or higher, with the same areas being seen in the coming days all the way to the East Coast. An extended period of extreme heat from the mid-Atlantic to the Southeast may eventually occur.

The summer of 2023 saw extreme heat rebound from place to place, with the wrath focused on areas like the Desert Southwest and the Gulf Coast.

This expansion of the heat dome is perhaps most prevalent in the summer. By early next work week, most of the lower 48 is expected to see temperatures well above normal, with the West being the only exception.

It looks like higher than normal temperatures will continue through the rest of the month in most places.

In the longer term, around 10 to 14 days or so, the heat dome may eventually be squashed slightly southward. That may not mean much or any relief for people most affected by the heat, like Texans.

Continuing rising temperatures are the hallmark of climate change. Incidents of unrelenting extreme heat, often caused by sluggish or stalled weather patterns, have been numerous in recent years around the world. An enhanced El Niño, characterized by warm waters in the tropical Pacific, will also add fuel in 2023.

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