The massive heat dome brings yet another heat wave, this time covering most of the United States

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While not as extreme as recent heat waves, this one will spread coast to coast due to a strong heat dome raising temperatures even more during the hottest period. of the year. The epicenter of the heat will develop in the northern and central plains – a region that has largely escaped the relentless and record-breaking heat of recent months.

A large high pressure ridge will stretch across much of the country by early next week, bringing potentially record high temperatures to the plains. Most states that have remained below average throughout the summer will begin to see near average or slightly higher temperatures in the southeast and southern plains.

The heat is going nowhere for the next two weeks, according to the Climate Prediction Center, as most of the country is expected to experience near-average temperatures, with the exception of northeastern New England.

Above-average temperatures range from the Pacific Northwest in the east to the Tennessee River Valley, as the heat dome dominates the weather pattern.

Heat warnings and advisories are already in effect for parts of the Midwest, where Heat Index values ​​on Saturday will begin to climb triple-digit. More advisories will likely be issued for the coming week as the heat intensifies.

New Orleans, Kansas City and St. Louis are included in heat advisories affecting more than 13 million people at the start of the weekend. Above-average temperatures will start to spread across the country on Friday, but will become widespread by next week.

The Climate Prediction Center outlook shows an above-average temperature trend for most of the United States.

The heat is increasing this weekend

Daily high temperature records could fall in areas of Montana that have already seen records smashed earlier in the season.

“It may come as a surprise, but this Sunday (7/25) is the only day in July that Billings’ record is below 100 °. The current forecast is 99 ° with a 50% chance that temperatures will reach 100 °,” according to National Weather Service office in Billings, Montana.
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Friday and Saturday will be a slight lull in the state’s most recent heat wave before temperatures climb into triple digits again by the end of the weekend. The peaks will approach records again and the low temperatures will offer little respite.

“Overnight lows are also expected to be quite warm (around 70 degrees in many places), so additional heat warnings may be needed if current forecast trends continue (perhaps Sunday through Tuesday or Wednesday)” , the Billings Weather Service Office said.

By the end of this weekend, the ridge will extend into the northern plains after a brief lull in the already scorching temperatures that some areas have felt throughout the summer.

Widespread triple-digit numbers will hit the western and central United States on Monday, with highs in the 100s covering the Great Basin, northern plains and southern plains.

The thermal dome could cause an episode of excessive heat in Montana, Nebraska, North Dakota, South Dakota and Wyoming early next week with temperatures 10 to 20 degrees above average.

“The potential exists for a prolonged heat event for our area,” said the National Weather Service office in North Platte, Nebraska. “If that materializes, widespread highs of over 100 degrees could be reached. ”

It’s not dry heat

High humidity values ​​will increase the heat even more, resulting in “felt temperatures” of over 100 degrees in the central United States throughout the week. The humidity rising north from the Gulf of Mexico will allow those heat indices to soar into triple digits in places like Dallas and Oklahoma City.

Southeast Montana, northeastern Wyoming, North Dakota and South Dakota will experience the hottest day on Monday when temperatures hit century in most places. Parts of northern Nevada and southern Idaho also see high temperatures peak on Monday.

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As of Tuesday, the warmer temperatures begin to move southeasterly as a northeasterly front moves south toward the Dakotas approaching.

Monsoon moisture could move across the northern central plains by the middle of the week, bringing brief relief to Wyoming and parts of Montana as it interacts with the approaching front and spurts scattered downpours. .

By midweek, triple-digit temperatures will stretch from South Dakota to southern Kansas, pressed south by the northern frontal border. Texas and Oklahoma will see temperatures close to triple digits throughout the week also due to the high pressure peak.

The summer heat arrives in the southeast

The area expected to see the most extreme temperatures is in the north-central plains, but in the southern United States, high temperatures will be well above 90 degrees for the first time this month.

“Having only had seven days of 90-degree or higher temperatures all year round so far, we’re looking at eight in a row … at least,” CNN meteorologist Brandon Miller said of the heat. arriving in Atlanta, Georgia.

From southern plains to central Atlantic, seasonal or above average temperatures are forecast for the coming week. The ’90s highs, ranging from Amarillo to Philadelphia, will give the region its first widespread glimpse of warm summer temperatures this year.

High temperatures are expected to exceed 90 degrees across the country on Monday.
The Southeastern United States has had a very mild summer so far. While most of the country experienced an above-average June, the warmest on average in the United States, the southeast experienced mostly average to below-average temperatures according to the June climate report from the United States. National Oceanic and Atmospheric Administration.

In addition to cooler conditions, rain persisted throughout June, bringing much of the Gulf Coast region above average total precipitation.

Heavy rains and heat waves centered on the Pacific Northwest have kept the region cooler and wetter than the rest of the country, a trend that ends with the onset of heat.



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