The polar vortex may be waking up before its alarm clock.
Weather experts keeping an eye on the atmosphere over the Arctic regions have taken to social media to announce they've noticed some unusually early behavior up there.
This anomalous 500mb geopotential height pattern is also talking with the stratosphere. It's not even October yet and we're seeing the Stratospheric Polar Vortex elongated in attempt of a split. Don't think there will be a split this early on but I wonder if this is foreshadowing pic.twitter.com/7cfiYhvQDl
— Michael Ventrice (@MJVentrice) September 23, 2018
The radiative stage of the stratospheric polar vortex is underway, regardless of any early season wave disruption. pic.twitter.com/rvJMw9hbNr
— Anthony Masiello (@antmasiello) September 26, 2018
Highly anomalous Beaufort Sea block will mean winter is off to the races in Canada with early season #cold and #snow. Is this foreshadowing or a head fake from Mother Nature about this upcoming #winter across North America? pic.twitter.com/2r46qXpS1i
— Judah Cohen (@judah47) September 26, 2018
Extremely unusual northern hemisphere profile on today's GEM forecast for 4th October.
Split polar vortex & hugely negative AO. Only something one would expect in a very unusual phase of weather, leads to interesting thoughts (only thoughts) for winter 2018 potential. pic.twitter.com/F8cHlJ7J09
— SevereWxUpdates2018 (@SevereWx2017) September 25, 2018
What does it all mean?
As the calendar plunges deeper into autumn, available sunlight continues to decrease in the northern hemisphere.
Because of that, the North Pole – and Arctic region – cools.
And, the change in temperatures over shorter distances is becoming more stark, which helps to fuel the polar jet stream.
"It's basically the strengthening early season phase to its mature winter phase," climate forecaster Anthony Masiello (not Buffalo's former mayor) explained this morning on Twitter.
So, are you ready?