Pictured above is the GFS Ensemble 500 millibar forecast for the very end of the forecast period, February 20th. High pressure has built in over the North Pole, and strong low pressure is present over south central Canada, extending into the Great Lakes. This is all in response to the sudden stratospheric warming we saw earlier on last month. The warming is now dying off, but its effects will continue for at least another week or two. During this time, previous warming will continue to propagate down to the surface, leading to increased chances for cold weather. One thing I am fairly certain of is the high latitude blocking finally making it into the North Pole. This blocking high pressure is already in northern Asia in the medium range, so only a slight shove north would result in the high pressure system reaching the North Pole. This could also be another effect of the previous sudden stratospheric warmings, or SSW's. SSW's are known to provoke blocking high pressure in the higher latitudes, so such a solution is certainly plausible. I do have some concerns about that small low pressure area in the Southwest US and high pressure area in the Pacific Northwest. That is a common set-up for a Rex Block pattern, which can induce warm and dry conditions over the East US- something snow lovers are certainly fearing.