Extreme, record-breaking heat will bake a large portion of the southern tier of the USA early this week.
After a sweltering weekend, heat advisories and excessive heat warnings remained in place Monday across the southern USA all the way from Southern California to the Florida Panhandle, and there was the potential for more record high temperatures and very dangerous heat indices, the National Weather Service said.
Temperatures could come within a few degrees of record highs set as far back as the Dust Bowl era of the 1930s, AccuWeather said.
„Excessively hot temperatures and high humidity may cause heat illnesses to occur,” the weather service in New Orleans warned.
Dozens of record highs were set across the Southwest on Sunday.
Sunday, Phoenix had its hottest day since July 25, 2018, soaring to a record 116 degrees, weather.com said. The city is threatening its record-long streak of daily low temperatures that did not drop out of the 90s.
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Palm Springs, California, hit a record high of 121, the weather service said.
California’s notorious hot spot, Death Valley, soared to 128 degrees Sunday, and its overnight low was a searing 100 degrees, according to the weather service.
In the South, temperatures near 100 degrees and high humidity will make it feel like it is 105 to 115 in some areas this week, ABC News reported.
„When combined with higher humidity levels, it could feel worse to some people when compared to that of the Southwest, especially in heavily urbanized areas where there is little breeze during the afternoon and early evening hours,” AccuWeather meteorologist Alex Sosnowski said.
This dangerous heat is the result of a large ridge of high pressure that stretches from the Desert Southwest to the Deep South; the center is anchored over the southern Rockies, according to WeatherBug.
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Southerly winds associated with this system will pump very warm air northward, resulting in the mercury climbing to levels 5 to 20 degrees above normal for this time of year, WeatherBug said.
According to weather.com, the dome of high pressure responsible for the Southwest heat wave will expand and stretch east across much of the rest of the country late this week.
Also Monday, severe thunderstorms with all hazards, including tornadoes, hail, damaging winds and heavy rain, are expected during the afternoon and evening from the Upper Midwest to the central High Plains, the weather service warned.
This article originally appeared on USA TODAY: Heat wave: Dangerous, record-breaking heat scorches southern USA
Thunderstorms will rumble across the nation’s heartland again this week, possibly in places that were hit over the weekend.
Freight regions. (Source: FreightWaves)
The National Weather Service (NWS) received more than 700 reports of severe weather Saturday and Sunday, combined. Eight of those reports were tornadoes, and a large number of the storms hit states in the Mountain Prairie and Midwest freight regions. Many of the same states will be under the gun again for the next few days.
A slow-moving frontal boundary, along with plenty of warmth and humidity, will trigger severe storms Monday from Denver to Fargo and Minneapolis.
All modes of severe weather are possible – destructive straight-line winds, large hail and tornadoes. Straight-line winds will be the biggest issue for truckers, with gusts reaching 75 mph in spots from eastern Colorado to southern and central Nebraska, as well as western Kansas. Gusts could be as strong as 60 to 70 mph in other areas like Denver, Colorado; the Oklahoma Panhandle; Omaha, Nebraska; Sioux Falls, South Dakota; Fargo, North Dakota; and Minneapolis, Minnesota.
Hail the size of golf balls or larger could pound many of these areas, or spots in between, and isolated tornadoes will touch down.
The NWS classifies a thunderstorm as severe if it produces any of the following based on radar or eyewitness reports:
- Winds of at least 58 mph (50 knots).
- Hail at least 1 inch in diameter (quarter size).
- A tornado.
Severe storm could also hit parts of the East Coast Monday, from New England to the Carolinas.
Severe storms will threaten many of the same areas as Monday, with the addition of portions of Wisconsin, the Texas Panhandle and eastern New Mexico.
For now, it looks like the overall risk of severe storms will back off a bit for Wednesday, but they will pop up in isolated spots from Denver and Pueblo, Colorado to the busy Joliet, Illinois market (near Chicago).
Drivers may also run into periods of torrential rainfall, with the chance of flash flooding and road/ramp closures.
Click here for more FreightWaves articles by Nick Austin.
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