Judah Cohenさんのイラストまとめ

"Ring of fire" as a meteorological term refers to thunderstorms around the periphery of high pressure but this month is apropos for the extreme #heat circling the Arctic Ocean first in #Siberia & next #Canada due to trapped "heat domes" along the northern edges of the continents.

In yesterday's blog I shared my expectation that there will likely be a pattern change in the Eastern US sometime in mid-May but so far the GFS shows no robust signs of a return to seasonable or relatively mild weather in the Eastern US in this morning's forecast.

In today's blog I argue that the current Northern Hemisphere weather pattern is consistent with a #PolarVortex split but when may we expect a pattern change? https://t.co/0rotabiRX0

For anyone in the Eastern US who is eager for an early preview of #summer weather, the GFS says you are likely going to need patience. Predicted persistent troughing in Eastern North America will favor relatively cool temperatures into early May, at least.

I would have loved to see the predicted pattern for April in one of the #winter months with high pressure stretching from Alaska to Greenland and low pressure across the Southern US. Would have been an active and interesting winter pattern but in April it is just annoying.

Models consistently predict first weakening of the #PolarVortex and warming of the polar stratosphere with cold air displaced to lower latitudes since November. What are the possible implications for our spring weather? https://t.co/cNZDZmod1S

The #Arctic Oscillation remains positive and the #polarvortex (PV) strong but because the PV is predicted to be no longer circular but rather elongated along an axis from Siberia to Canada allowing cold air to spill out of the Arctic into Siberia and Canada in early March.

If you are a #winter weather enthusiast like myself, there ain't much to cheer about in the weather model forecasts, ol' man winter is on life support imho. But there is the chance he may cough up a nor'easter next weekend but temperatures are marginal for #snow.

I never would have guessed that 2020 would kick off with as good as an example of #cold #Arctic/#warm continents as you will see in the era of a rapidly warming Arctic. The one holdout of a cold Arctic Ocean are the Barents-Kara Seas where sea ice loss is the greatest.

GFS now predicting stronger high latitude blocking/high pressure in the Arctic for next week resulting in more widespread #cold temperatures both across Eurasia and North America heading into mid- to late- December