US: A Weekend Of Extremes Coming Up With Busy & Exciting Pattern Developing…

Written by on December 11, 2015 in Autumn 2015, United States of America, Winter 2015/16 with 0 Comments

It’s a busy weekend of weather coming up with a storm system winding up over the Plains. We’ll see winter in the west and summer in the east with a mix of flooding rain, snow, possibly ice and severe weather in between.

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: weather.com

Credit: weather.com

Weather Channel

Weather Channel

Behind this storm system, temps will run 10-20 below normal while it’s 20-30 above normal east of the Mississippi.

Credit: AccuWeather

Credit: AccuWeather

Weather Channel

Weather Channel

Credit: AccuWeather

Credit: AccuWeather

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Latest GFS surface shows the mess coming this weekend over the Mississippi Valley with warm, moist air lifting out of the Gulf. This will be a major rain event for some. Also note the next big system slamming into the West Coast.

Credit: AccuWeather

Credit: AccuWeather

During Monday that big Plains system continues to deepening and may likely cause wind issues around the Great Lakes and heavy rain and slice in temps up the East Coast but the next system is crossing the Rockies.

Credit: AccuWeather

Credit: AccuWeather

It’s that second low which looks to tug on more arctic brand cold. As stated yesterday, the cold will come down in waves with each wave colder than the last.

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

This looks to be the first shot of arctic air to make it into the East while another 1-2 lows come in from the Pacific and dive SE towards the Four Corners while another low takes a more northerly route across southern Canada.

Watching this setup for phasing between southern and northern branch. Keep in mind that heights are rising north and west over top and this is forcing arctic air south. If the southern-northern branch connect say over the Mid-Mississippi Valley you’ve got a setup for major snowstorm or blizzard as well as arctic outbreak in it’s wake.

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

Credit: AccuWeather

GFS 10 day snow

Credit: AccuWeather

Credit: AccuWeather

ECMWF 10 day snow

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Interesting and exciting times ahead. Keep it right here.

See tonight’s video for the discussion.

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