Sunday, July 27, 2025

Heat Dome (or, some random circle of Hell)

This summer has been the worst I can ever remember for terrible heat. It's been truly awful, and there's no end in sight.

Okay, I know I complain about the heat every summer. It's just part of living in the Deep South this time of year. But. This is ridiculous, even for us. They say we're under a "Heat Dome".

From The Weather Channel's website:

What Is A Heat Dome? Explaining The Deadly Weather Pattern Behind America's Most Dangerous Summer Days

These expansive areas of sinking air can push temperatures up to 30 degrees above average during the summer while increasing the threat of heat illnesses.

They're known by many names: Heat dome. Ridge of high pressure. Death ridge. Blocking high.

But do you really know what these are and why they can produce deadly weather?

These expansive bulges of warm air can stretch for 1,000 miles during the spring and summer months and provide sinking air over much of the country.

It's that sinking air that is often problematic.

Descending air compresses and warms as it drops closer to the surface. Temperatures can often reach the century mark in the eastern two-thirds of the United States. In the West, these death ridges can push temperatures into the 110s and 120s in the desert.

Days-long heat waves are often the result.

This sinking, warm air also dries out the ground and the air above it. Thunderstorms have a tough time sprouting due to the suppressive motion of the air. Drought can begin or worsen under ridges of high pressure that last for longer than a week. The air directly under such a system can become still with little to no wind.

During the middle of the summer, this can become a vicious cycle of warming and drying.

These domes can strengthen and expand during this cycle until something comes along to push the high-pressure system elsewhere.

Heat is the No. 1 weather killer in the U.S., with hundreds of fatalities each year. Many of these fatalities occur under heat domes.

We've had weeks on end of daily temperatures reaching up to around 100 degrees (37C) with the heat index "real feel" of up to 112 (44C). With the humidity factored in, it's hellish. There's just no other word for it. And there's been little to no rain. Even the nights are unbearably hot. We've been under extreme heat warnings every day since the beginning of the month, and we have a least another full week to go. 

I can't tell you how much I've grown to despise summer!





















5 comments:

  1. We've been warm up here, highs in the mid 90s (F) but that heat only lasts for a day or two. I do feel bad for you.

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  2. Oh, that last one, LOL! Hang in there!

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  3. That last shot is a great idea. Bring the pets. Let’s get a table outside!

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  4. Yes, freezer side seating is a great idea.

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  5. Imagine the poor people who do not have air conditioning! Hope it cools off for you soon, Jennifer.

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