美国这气温分布真是奇葩啊

[lostsoul]

[Leuning]

Middleterranian weather has mild summer
High altitude is cooler

[lostsoul]

Middleterranian weather has mild summer
High altitude is cooler

东部沿海从南到北，居然越来越热

[洪荒之前]

我们这旮往年这个时候都要热翻了，今年出奇的凉爽。

[Leuning]

Middleterranian weather has mild summer
High altitude is cooler

东部沿海从南到北，居然越来越热

That’s why Silicon Valley is in Bay Area, California: rich people want to live where weather is the best.

——————

Because most regions with a Mediterranean climate are near large bodies of water, temperatures are generally moderate, with a comparatively small range of temperatures between the winter low and summer high unlike (the relatively rare) dry-summer humid continental climates (although the daily diurnal range of temperature during the summer is large due to dry and clear conditions, except along the immediate coastlines). Temperatures during winter only occasionally fall below the freezing point and snow is generally seldom seen. Summer temperatures can be cool to very hot, depending on the distance from a large body of water, elevation, and latitude, among other factors. Strong winds from inland desert regions can sometimes boost summer temperatures up, quickly increasing the risk of wildfires.

[牛河梁]

热穹顶是一种大气现象，类似于冬季的冷涡。围绕着两极转。木星（下图）及土星两极也有类似现象。

旧金山湾区前些时候也升温过1天气温高达80多华氏度。应该是热穹顶过境。现在移到东部了。

[lostsoul]

热穹顶是一种大气现象，类似于冬季的冷涡。围绕着两极转。木星（下图）及土星两极也有类似现象。

旧金山湾区前些时候也升温过1天气温高达80多华氏度。应该是热穹顶过境。现在移到东部了。

原来是这么回事 heat dome

https://www.npr.org/2025/06/24/g-s1-743 ... -explained

What is a heat dome?
"It almost acts like a lid on a pot," the National Weather Service's Alex Lamers told NPR, discussing how a heat dome works. Lamers is the operations branch chief at the Weather Prediction Center.

"If you've made grilled cheese in a pan and you put a lid on there, it melts the cheese faster because the lid helps trap the heat," Lamers said. "It's a similar concept here: You get a big high-pressure system in the upper parts of the atmosphere and it allows that heat to build underneath over multiple days."

That's right: days, or even weeks.

A heat dome is basically a massive area of high pressure and warm air that "parks" over a region. The exact location is generally linked to the jet stream — and right now, the jet stream is moving sharply to the northeast, from the upper Baja California peninsula to a spot just west of Lake Michigan. That allows a heat dome to persist in much of the eastern half of the U.S.

When a heat dome sits over a large land area, it can form a sort of feedback loop, Lamers said, adding that high pressure typically means dry weather, which can help drive the heat even higher.

Extreme heat has shattered records in many parts of the U.S. in recent years, and scientists warn that we're likely to see even more dangerous temperatures in the future — a trend linked to human-caused climate change. Both 2023 and 2024 were designated the hottest years ever recorded.

[牛河梁]

热穹顶是一种大气现象，类似于冬季的冷涡。围绕着两极转。木星（下图）及土星两极也有类似现象。

旧金山湾区前些时候也升温过1天气温高达80多华氏度。应该是热穹顶过境。现在移到东部了。

原来是这么回事 heat dome

https://www.npr.org/2025/06/24/g-s1-743 ... -explained

What is a heat dome?
"It almost acts like a lid on a pot," the National Weather Service's Alex Lamers told NPR, discussing how a heat dome works. Lamers is the operations branch chief at the Weather Prediction Center.

"If you've made grilled cheese in a pan and you put a lid on there, it melts the cheese faster because the lid helps trap the heat," Lamers said. "It's a similar concept here: You get a big high-pressure system in the upper parts of the atmosphere and it allows that heat to build underneath over multiple days."

That's right: days, or even weeks.

A heat dome is basically a massive area of high pressure and warm air that "parks" over a region. The exact location is generally linked to the jet stream — and right now, the jet stream is moving sharply to the northeast, from the upper Baja California peninsula to a spot just west of Lake Michigan. That allows a heat dome to persist in much of the eastern half of the U.S.

When a heat dome sits over a large land area, it can form a sort of feedback loop, Lamers said, adding that high pressure typically means dry weather, which can help drive the heat even higher.

Extreme heat has shattered records in many parts of the U.S. in recent years, and scientists warn that we're likely to see even more dangerous temperatures in the future — a trend linked to human-caused climate change. Both 2023 and 2024 were designated the hottest years ever recorded.

还有一个规律。如果那天（新唐人啥的）说中国（华北河南）太热日子没法过了。过几周就到加州然后到美东了。一样的原因，同一个大型（高气压热穹顶）气旋。绕着北极在北半球从西向东跑。