The Cold Builds to the North as Active Jet Stream Moves In

As mentioned last week, an active pattern is setting up across the central portion of the US. Current temperatures during the warmest part of the day are quite cold across Canada as you can see below.

This build up of cold air is just asking to be sent south and some will over the next couple of weeks. The kicker will be an active jet stream and low pressure across the interior west of the United States. The cold air looks to come down in waves so will likely modify some as it heads south. So portions of the central Plains could see snow falling by this upcoming weekend (north of I-70).

As several areas of low pressure come out of the west and head east/northeast towards the Great Lakes. Producing rain and some storms from the Southern Plains northeast into the Great Lakes region. Now this will just be the first of likely 3 or 4 storms over the next two weeks. Each one producing heavy rains but each one will likely press the snow line to the south. Right now the ensembles and long range models continue to point to a very cold(relative to average) mid month and Thanksgiving week across most of the US.

So anyone from the Texas Panhandle to Louisville to New York City and points to the north better be on guard for shoveling snow by Thanksgiving week. Places east of the Mississippi will likely see the real cold air not arrive till Thanksgiving week. So here comes the cold air as it will likely feel like late December in the third week of November. So I warned you and you better get those thermal long johns ready.

Here is the latest 8-14 day analomy and the latest 8-14 day outlook from CPC