A potential weakening in the wall of fast-moving air currents that normally hold back blasts from the Arctic may have caused the wave of bitingly cold air that swept into China, rewriting seasonal records for low temperatures. The latest edition of the Polar Vortex Blog suggests that the polar vortex will remain slightly weaker than average through December, with the possibility of a full-on breakdown. Meteorologists are observing signs of a pattern change in the New Year, with the polar vortex weakening and allowing cold air to spill south. The extent to which the early January timeframe favors Mid Atlantic snow events remains unclear, but a pattern change is expected around the New Year.
A pattern change is still expected around the New Year, but to what extent the early January timeframe favors Mid Atlantic snow events is still unclear. The post-Christmas storm, while likely a rain event for many in the East, suppresses the baroclinic zone south as it departs: https://t.co/nhO08zs09Y
Could there be signs of a pattern change in the New Year? The simple answer is yes. One thing we watch is the polar vortex, but unlike what people think, the polar vortex doesn't move south. It actually weakens sometimes and allows cold air to spill south. So, for cold air… https://t.co/9Q43doPiNB
A weaker Polar Vortex in the new year? Cold air will be on the move in the northern hemisphere; the question will be to where? The recent trend for these events has been sharper narrower troughs affectING smaller areas. We shall see. https://t.co/KO3kfnU8er
A weaker Polar Vortex in the new year? Cold air will be on the move i the norther hemisphere, the question will be to where? The recent trend for these events have been sharper narrower troughs affect smaller areas. We shall see. https://t.co/pSISrPyoAC
The latest edition of our Polar Vortex Blog just dropped! Most models predict that the polar vortex will remain slightly weaker than average through December but others say a full-on breakdown remains in the cards. https://t.co/EhrKtd3iZa https://t.co/InQQDJvncM
Active subtropical jet in January. Maybe it can sync up with cold air intrusions? We'll see. https://t.co/G5Udrix7sS
The cause of a wave of bitingly cold air that swept into China and rewrote seasonal records for low temperatures may lie further north - a potential weakening in the wall of fast-moving air currents that normally hold back blasts from the Arctic https://t.co/x2PhPHQXhB