US Enters Tranquil December Pattern Except For West & East Coasts!

Written by on December 3, 2015 in Autumn 2015, United States of America, Winter 2015/16 with 0 Comments

The majority of the US is now entering a tranquil, mild high pressure pattern as we head deeper into December. The only real weather to speak of will be in the Pacific Northwest as well as a a couple of systems running up the East Coast but on the whole, by early winter standards, it’s a quiet pattern with no real cold or major snow to speak of. In fact the lack of snow and possible ‘warm surges’ is likely to be the topic for winter’s opening month.

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Yes, December 1 opened with 38% of the Lower 48 snow covered, the most for the date since 2003 but the East, especially I-95 on towards the coast may have to wait a while before they see their first snows.

Current coverage.

cursnow_usa

Don’t get too comfortable, I expect big changes later on down the road.

Check out these 5-day mean 2m temp anomalies.

0-5 day

Credit: AccuWeather Pro

Credit: AccuWeather Pro

5-10 day

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Even day 10-15 is warm in the East but turns cooler Out West.

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Not much snow for the East through Dec 13.

Credit: AccuWeather Pro

Credit: AccuWeather Pro

ECMWF has more snow across the country than the GFS but notice it has some for the interior Mid-Atlantic and Northeast.

Credit: AccuWeather Pro

Credit: AccuWeather Pro

The below GFS surface which takes us way out past 300 hours shows high pressure and mild air dominating really from the Plains to East Coast, some wet, windy conditions pushing into the West with high elevation snow but the air is Pacific and not Arctic and so it’s not as extreme as back in late November in terms of cold.

Note in the East we have a system which lifts up the coast. This will be a rain and wind maker for the coast and I-95 with a chance of snow in the mountains. Then towards the end of the 10-15 day period, a system is seen to come out of the Gulf and ride up the EC.

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Video will be available later! Stay tuned.

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