Records to topple in Southeast amid ‘dangerous’ heat near 105 degrees

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A sweltering heat dome has been baking much of the southern United States for about two weeks now, and it shows no signs of letting up its grip on the Lower 48. Intense heat pulse is setting records in the Southeast , with highs near 105 degrees in parts of the Georgia and Florida Panhandle and heat index values ​​exceeding 110.

The National Weather Service has lifted heat advisories across swathes of the South, with 56 million Americans in areas that will peak in triple digits.

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“The combination of hot temperatures and high humidity will combine to create a dangerous situation in which heat-related illnesses are possible,” the National Weather Service office in Tulsa wrote.

The worst of the heat will impact the Southeast on Wednesday and Thursday, but there are signs that a new pulse of exceptional heat will watch over the plains and the Mississippi Valley through the weekend, extending the unusual roasting .

In recent days, many heat records have been set from North Dakota to Texas. Notably, Minneapolis hit 101 on Monday, its first time over 100 since 2018. On Tuesday, Milwaukee hit the century mark for the first time in almost a decade.

The worst of the heat will be concentrated from the Ohio River and the Tennessee Valley in the Carolinas, Southeast, South and Texas. Just about everyone will be in their upper 90s at least, and most have a decent chance of rocking into the lower 100s. A number of records could be set in the South; here’s a breakdown of how hot most cities could get and whether the records are in jeopardy.

  • Atlanta: Probable record connection. The maximum should reach 98 degrees. The record is 98, set in 1964.
  • Macon, Georgia: New record likely. The maximum should reach 102 degrees. The record is 101, set in 1925.
  • Albany, Ga.: New record likely. The maximum should reach 103 degrees. The record is 102, set in 2009.
  • Tallahassee: The maximum should reach 102 degrees. The record stands at 103, set in 2009. But it is expected to be the first time the city has hit 100 in more than 1,000 days.
  • Mobile, Alabama: New record likely. The maximum should reach 101 degrees. The record stands at 100, set in 2009.
  • New Orleans: New record likely. The maximum should reach 97 degrees. The record is 96, set in 2009.
  • Montgomery, Alabama: The maximum should reach 100 degrees. The record stands at 101, set in 2006.
  • Birmingham, Alabama: The maximum should reach 99 degrees. The record is 101, set in 1930.
  • Huntsville, Alabama: The maximum should reach 99 degrees. The record is 105, set in 1933.
  • Nashville: The maximum should reach 99 degrees. The record is 100, set in 1988.
  • Lexington, Kentucky: The maximum should reach 96 degrees. The record is 99, set in 1988.
  • Memphis: Probable record connection. The maximum should reach 100 degrees. The record is 100, set in 1988.
  • Tupelo, miss: The maximum should reach 100 degrees. The record is 103, set in 1936.
  • Jackson, miss: The maximum should reach 99 degrees. The record is 101, set in 1969.
  • Small stone: The maximum should reach 99 degrees. The record is 100, set in 1988.

In addition to the multiple records likely to be tied or broken, note the number of places flirting within a degree or two of the records.

In some places, heat and humidity combine to give heat indexes in excess of 110 degrees. This will create dangerous conditions that can lead to heat exhaustion and heat stroke for those who exercise outdoors.

Records continue on Thursday

Temperatures are similar on Thursday, although the worst of the heat is suppressed a little further south.

Here are some of the highest predicted temperatures and where records are expected to be set:

Macon, Georgia: New record likely. The maximum should reach 103 degrees. The record is 101, set in 1988.

Albany, Ga.: Probable record connection. The maximum should reach 104 degrees. The record is 104, set in 1944.

Tallahassee: New record likely. The maximum should reach 104 degrees. The record (June 23) is 103, set in 1944. The city could flirt with its absolute record of 105.

Thermal domes are ridges of high pressure. They mostly feature clear skies, descending air, and abundant sunshine. It also deflects the jet stream further north in the Upper Midwest or southern Canada, deterring any adverse weather systems.

The stronger the heating dome, the hotter the air mass. The European weather model simulates that temperatures at the 850 millibar level, about a mile above the ground, are in the unprecedented category. Anything magenta in the plot hints at something outside of the historical sightings dataset.

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On Saturday, the heat dome will move a bit westward, bringing readings of 100 to 104 degrees to most of Texas, Oklahoma, Arkansas, Louisiana and Mississippi away from the coasts, western Alabama, western Tennessee and southeastern Missouri.

There are signs that the heat dome could ease or possibly break up early next week, but the National Weather Service Climate Prediction Center continues to highlight the chances of above-average temperatures for the weeks to come.

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