[HN Gopher] A sudden stratospheric warming is coming
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A sudden stratospheric warming is coming
Author : ta988
Score : 20 points
Date : 2023-02-08 15:21 UTC (7 hours ago)
(HTM) web link (www.severe-weather.eu)
(TXT) w3m dump (www.severe-weather.eu)
| Snoozle wrote:
| Very in depth article but the short of it is that there will be
| colder than usual weather across northeast usa and Canada as well
| as slightly colder than usual in Northwest Europe. This will
| occur most likely in March.
| aaroninsf wrote:
| KagiAI summary:
|
| A Sudden Stratospheric Warming event (SSW) is forecast to
| displace the Polar Vortex and potentially shake the weather
| patterns in the coming weeks. The Polar Vortex behaves like a
| very large cyclone, covering the whole north pole down to the
| mid-latitudes. Rossby Waves (a pair of strong high and low-
| pressure systems) deflect energy upwards into the Stratosphere
| as they break, temporarily pausing its strengthening or
| weakening its circulation. The influx of energy into the
| Stratosphere creates a major disruption and warming, completely
| collapsing the upper stratospheric Polar Vortex. The forecast
| for the 30mb pressure level in the Stratosphere shows a
| complete collapse of the upper and middle Polar Vortex. The
| pressure pattern analysis for the weekend shows a strong lower
| core of the Polar Vortex bringing very cold air over the
| Midwest and the eastern United States. The temperature anomaly
| also shows the strong, abnormally high temperatures surrounding
| the Vortex, weakening it further. The expected pressure pattern
| post-SSW is high pressure over the polar regions and low
| pressure in the lower latitudes, prompting a low-pressure
| response over the eastern United States and Europe. The
| temperature anomaly from the CFS ensembles shows this cold
| extension from Canada down over the Midwest and into the
| eastern United States. An interesting fact is that the Polar
| Vortex can reach over 50km/31miles in altitude, making it a
| powerful force in the atmosphere.
|
| https://labs.kagi.com/ai/sum?url=https://www.severe-weather....
| JPLeRouzic wrote:
| Thanks for the summary, I read this long article and at the end
| I was not sure I understood what it says.
| autoexec wrote:
| the news has said that March went "out like a lion" a lot
| lately. This may be the 6th year out of the last 7. I like
| having notice this early though.
| ta988 wrote:
| I found the explanations of how the polar vortex really "works"
| worth a read.
| llampx wrote:
| This website reads a little alarmist.
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(page generated 2023-02-08 23:02 UTC)