~NWWO strikes again, leaves a last taste of wild temperature variations.
~ A rogue vortex came from afar
We pay attention to coming storm named Stella which will cause havoc, first it is primarily a coastal Cyclone heading Northeastwards along the USA coast:
But it meets an "Upper level Low" as skillfully described by Dr Masters. But this Low, a vortex, born from an offshoot of a massive but short lived cold spell from Central Ellesmere Island at about March 8, when surface temperatures were more or less unusually normal for this time of the year. As we follow its progress with 700 mb upper air temperatures, we can see the gradual meanderings of the coldest air in the Northern Hemisphere, a spin off vortex, eventually ended up centered near Montreal. But tonight the Ellesmere origin of this has warmed 17 C, leaving vortices in its waning vanishing coldness. The size and or variations gyrations of the coldest air zones, quite smaller than usual, marked this winters outlook significantly, favoring a continuous incursion of Pacific and Atlantic Cyclones to shield the Arctic Ocean from the normal long night lost of heat to space, there is always still a great chance for severe cooling given a lack of clouds by Anticyclones, this is how great Northern Hemisphere winters were made, but the winter factory shrunk. WD March 13, 2017