Another week of record-breaking heat, or at least above average temperatures, is in store for the Central United States. During the Memorial Day Weekend, several records were broken. The most impressive one that we thought was the fact that Minneapolis hit 100 degrees on Monday. If you remember six weeks ago, they were experiencing a record-breaking snowstorm. That 100 degree high not only broke the record for the date, it will the warmest day in May in history. It was also the earliest day to hit 100 degrees.
It has officially reached 100° in the Twin Cities! This is only the second date in the month of May the Twin Cities have reached 100°.
— NWS Twin Cities (@NWSTwinCities) May 28, 2018
The start of the week will be hot in the Midwest, but the heat will be more confined to the Southern Plains as the week progresses due to a more active weather pattern with a train of upper-level disturbances passing through, thus allowing for cooler but still seasonable to above-average temperatures.
Cooler temperatures will return to the Midwest this Wednesday while the anomalously strong upper-level ridge remains persistent over the Southern Plains. Now while it will cool down across the Midwest region, temperatures will still be 5 to 15 degrees above normal. In Texas, it will be up to 25 degrees above average. With average high temperatures generally ranging from 85 to 95 degrees statewide, that will translate to high temperatures this Wednesday into the 100s for most. This will break daily record highs in many locations.
By Thursday, the heat will actually build back to the north as the ridge of high pressure strengthens over the Northern Plains and Midwest. Therefore, widespread high temperatures of 10 to 20 degrees are forecast from the Mexican border to the Canadian border. The warmest of temperatures relative to average will be located from West Texas up through the leeward side of the Rocky Mountains. The geographic feature aids in very warm temperatures at times because the air sinks once it moves east of the mountains, and this sinking motion is a heating process of the air. In terms of actual high temperatures, there will be widespread 90s. In parts of the Upper Midwest and Northern Plains, it will be a tad cooler into the 70s and 80s. Texas will continue to seethe in the 100-plus degree temperatures. Another day of record high temperatures will be broken. Some locations in West Texas will likely surpass 110 degrees as well.
The axis of the highest temperature anomalies will be across the Plains. Many will experience temperatures 15 to 25 degrees above average, which translates to actual highs in the 90s and 100s — and yes, more records will be broken, especially in the Southern Plains.
By the weekend, this ridge of high pressure will relax, allowing for the above average temperatures to persist but not to the levels this week.