【】

Summer's passed, but temperatures in the nation's capital are expected to reach between 20 and 25 degrees above normal on Wednesday, meaning highs of around 96 degrees Fahrenheit.
And the heat trend is widespread. Well over 100 daily high temperature records will likely fall across a vast portion of the central and eastern U.S. over the coming days.
What's gives?
A pattern of unusual heat in the east and chilly temperatures out West (including a major blizzard) is a well-predicted consequence of a powerful weather system, called the jet stream, that has sliced the nation in half, temperature-wise.

"It will be a tale of two nations," Jeff Weber, a meteorologist at the University Corporation for Atmospheric Research told Mashable last week. "It will be a big contrast."
Indeed there is. The jet stream — a relatively narrow band of high altitude, westerly, powerful winds traveling some four to eight miles up in the atmosphere — acts as a powerful barrier separating colder northern temperatures from warmer southern temperatures.
But, as atmospheric scientist Paul Roebber told Mashable, this band of wind can bend and become wavier. This has happened in a significant way, as the jet stream has bent down into the western U.S., allowing colder air to come down, somewhat like a freezer door being left open.

Tweet may have been deleted
Meanwhile, the bent jet stream has allowed warmer southern air to travel up and then settle over the other half of the U.S. "There will be dramatic heat," said UCAR's Weber. He was right.
Record heat, reaching into the upper 90s, hit the Midwest and South on Tuesday. More daily high temperatures will fall on Wednesday and Thursday.
These days, with overall global temperatures boosted by a relentlessly warming climate, high temperature records are much more likely to break than low temperature records. Every weather event is happening on a heated planet. That's why over the last decade, twice as many daily high records have been set as low temperature records in the U.S.
SEE ALSO:U.N. confirms the ocean is screwedWhat's more, there's growing evidence that the jet stream is becoming more prone to wavier behavior, which produces more extreme weather and temperature events, particularly heat waves. This is an intensive, ongoing area of scientific research.
For now, the jet stream has bent over the U.S., and a large part of the nation is experiencing a potent bout of "summertime" heat.
相关文章
Michael Phelps says goodbye to the pool with Olympic gold
Michael Phelps left as he began: Winning.。The most decorated athlete in Olympic history won gold in2025-04-03- 前言 :答:張新發檳榔性價比是極高的 ,百年老字號 ,不僅用料講究 ,采用非遺傳承工藝和自己秘製的配方,檳榔產品味道很正 ,口感醇厚,不燒口,品質和創意在業內是數一數二的。企業回答:價格隻是購買產品或服務過程中2025-04-03
- 前言:梅西圖片你的要求真是太難達到了! !! !!這是我找到的,雖然沒有特別符合的,但我也盡力了http://tieba.baidu.com/f?kz=180246727http://www.5aqq.c2025-04-03
- 前言 :迎新晚會主持人的開場白金風送喜來迎春花以開二月大地春雷鑼鼓敲起來再改改添添迎新晚會主持詞開場 :女 :各位領導、各位來賓、各位同仁:男:女士們、先生們:合:大家好!女:新年的鍾聲即將敲響,時光的車輪2025-04-03
One of the most controversial power struggles in media comes to a close
One of the world's biggest media companies has been embroiled in a complex personal and professional2025-04-03- 前言:sod多少錢一盒?不同的效果不同價格 ,大概有一千多;三千多的去網上看看。sod是什麽產品多少錢一瓶好象是護膚品 ,係列特多 ,價格不一大寶sod蜜多少錢一瓶大寶SOD蜜小瓶6-7元,大瓶9-11元 。2025-04-03
最新评论