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Jet stream has stopped and La Niña is causing strange weather

Kenneth Warner will dive into the water on Tuesday, November 16, 2021 to rescue a car driver who has flowed into the flooded Nuksack River in Ferndale, Washington. Winter has begun strangely in the United States. The Pacific Northwest has recorded record rainfall, and Denver and the Rocky Mountains have yet to see the first significant snowfall of the season.Credits: AP Photo / Elaine Thompson, File

American winter wonderland begins this season as non-traditional.


Although the calendar says December, most of the country’s temperatures demand sandals. In the Pacific Northwest, you need an umbrella, if not an ark, but in the Rocky Mountains snow shovels collect spider webs.

Meteorologists attribute the latest batch of record-breaking extreme weather events to jet stream stagnation and the effects of La Niña weather patterns from equatorial Pacific cooling water.

Although it is still astronomically autumn, winter begins on December 1st for meteorologists. No one told the weather this year.

Thursday, 65 Meteorological station Springfield, Missouri reached 75 degrees Celsius (24 degrees Celsius) and Roanoke, Virginia reached 72 degrees Celsius (22 degrees Celsius), setting record highs nationwide on December 2. Cheyenne, Wyoming and Billings, Montana broke six years of heat records.

Canada and parts of Montana have seen the best December record in recorded history. On Friday, parts of South Carolina and Georgia hit record highs.

In Washington, Seattle, Bellingham, Quileute All set 90 days fall record Because of the rain. Bellingham was hit by nearly two feet (60 centimeters) of rain. The Olympics and the Cascade Range were hit harder, 50 inches (127 cm) or more in 3 months, According to the National Meteorological Service. Forks, Washington received more rain in 90 days than Las Vegas received in 13 years.

Explainer: Jet stream has stopped and La Niña is causing strange weather

On Wednesday, November 17, 2021, a flood broke out along a road in Sumas, Washington, and winter began strangely in the United States. The Pacific Northwest has recorded record rainfall, and Denver and the Rocky Mountains have yet to see the first significant snowfall of the season.Credits: AP Photo / Elaine Thompson, File

What’s more, at the Big Island Summit in Hawaii, snowstorms of up to 12 inches (30.5 centimeters) are expected and gusts of over 100 miles per hour (161 kilometers per hour) will blow.

Meanwhile, there was no snow in Colorado. Before this year The latest and first measurable snowfall on record It was November 21, 1934 in Denver. There is a slight chance that it will snow on Monday night. Meteorological service.. Still, it hasn’t snowed since April 22, so this is the third longest section the city has done without snow.

One big factor: Jet stream- The river of air, which moves the weather from west to east on a roller coaster-like road, is just stuck.In other words, when a low pressure system occurs in a part of a stream, it rains in the Pacific Northwest, and when a high pressure system is applied to about two-thirds of the country, it becomes dry. Warm weatherBrian Harley, a senior meteorologist at the Meteorological Bureau’s Weather Forecast Center in College Park, Maryland, said.

As the jet stream moves more or bends differently, rain and other extreme weather events will be less concentrated, Harley said.

He said this is a typical weather pattern in which the La Niña phenomenon occurs naturally. Behind El Nino, La Niña is the cooling of parts of the Central Pacific that change weather patterns around the world. Laninas tend to It brings more rain to the Pacific Northwest, making the South drier and warmer.

Meteorologist Jeff Masters, the founder of Weather Underground, who currently works at Yale Climate Connections, said these extreme weather attacks occur more frequently as the world warms. However, scientists have not done the research necessary to attribute these events to anthropogenic climate change.

In Boulder, Colorado, meteorologist Bob Henson enjoyed riding a rare December bike on Thursday.

Still, “I have a lot of anxiety about the lack of snow,” he said. “It puts you in a mental predicament. You enjoy warmth. weather Keeping in mind that it is not good for the earth to warm up. ”


Forecaster predicts two-thirds warm winter in the United States


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Quote: Explanator: Strange jet stream, La Niña causes strange weather (December 4, 2021) December 4, 2021 https://phys.org/news/2021-12-stuck-jet-stream Obtained from -la-nina.html

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Jet stream has stopped and La Niña is causing strange weather

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