Post · bonfire of thepocolips

…Over the next 10 days, changes in the stratosphere will upend #weather patterns & set the stage for a cold, snowy December across the Northern Hemisphere.

It will mean a dramatic swing in weather for parts of the #US that are currently simmering in record heat….

It could also be one of the earliest significant #PolarVortex disruptions recorded since the dawn of the satellite era.

#ClimateChange #ExtremeWeather #Trump #NaturalDisasters #FEMA #NOAA #NationalGuard
https://www.cnn.com/2025/11/19/weather/polar-vortex-cold-snowy-december-stratosphere?cid=ios_app

CNN

The polar vortex is about to bring a wild weather pattern change | CNN

Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.

Nonilex

@Nonilex@masto.ai replied · 15 hours ago

Think of the stratospheric #PolarVortex like a wall of wind, corralling the ultra-cold, Arctic air over the North Pole. When it weakens, cold air spills south into places like the Lower 48, Europe & Asia.

Right now, the air in the stratosphere — the layer of the atmosphere above where most #weather occurs — is warming quickly & dramatically, in a phenomenon known as a sudden stratospheric warming event.

#ClimateChange #ExtremeWeather #Trump #NaturalDisasters #FEMA #NOAA #NationalGuard

Nonilex

@Nonilex@masto.ai replied · 15 hours ago

But the sudden warming in the far upper atmosphere is going to result in anything but warmth. It is causing the #PolarVortex winds to weaken, said Amy H. Butler, a meteorologist at the #NOAA, & they could even reverse.

…These warming events…can trigger the most intense “polar vortex” cold-air outbreaks in the #US.

#ClimateChange #ExtremeWeather #Trump #NaturalDisasters #FEMA #NationalGuard

Why the polar vortex matters for our weather The polar vortex plays a key role in winter weather in the Northern Hemisphere. When the polar vortex is strong, cold air is trapped around the North Pole. But when it weakens, the cold air can spill south into the US mainland — like opening the freezer door. As a result, conditions are colder and snowier than normal.

Nonilex

@Nonilex@masto.ai replied · 15 hours ago

Over the next two weeks, these shifts could start to be felt in #NorthAmerica, #Europe & #Asia as the #PolarVortex weakens & tumbles south, like a spinning top that slows & wobbles off course.

One unusual feature of this event is its timing; sudden stratospheric warming events of this magnitude are almost unheard of in November, said meteorologist Judah Cohen, a research scientist at MIT.

#ClimateChange #ExtremeWeather #Trump #NaturalDisasters #FEMA #NOAA #NationalGuard

Nonilex

@Nonilex@masto.ai replied · 15 hours ago

…Scientists are watching for colder than normal conditions to develop in the mid-latitudes—where most of the population resides—over the next month or so. Once the #PolarVortex is disrupted, it can take a month or more to recover, said Andrea Lopez Lang, a meteorologist at the University of Wisconsin-Madison.

What’s most difficult to predict is where the polar vortex will deliver its icy blast, & the temperature outlooks aren’t taking it fully into account, yet.

#ClimateChange #ExtremeWeather

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