East Briefly Warms While Swath Of Snow Impacts Denver To Minneapolis Corridor

Written by on November 5, 2013 in United States of America with 0 Comments

This morning was of course the coldest of fall 2013 for the Northeast and Mid-Atlantic but the good news is, if you like some warmth during November, your getting it back midweek as a storm system gathers over the Plains and is set to bring a swath of snow from Denver up to Minneapolis. As the trough deepens once again over the center of the country, so heights rise in the East and with sunshine and southwest winds, we see a surge of 60s returning.

Here’s the GFS surface/precip chart for tomorrow.

Courtesy/Owned by AccuWeather Pro

Courtesy/Owned by AccuWeather Pro

As for the snow, well there’s a decent 2-4 inch swath from western Nebraska up to the UP of Michigan which fall over the next 36 hours starting Tuesday morning. Though the GFS doesn’t show it, I think Denver and the eastern plains of Colorado should pick up at least a few inches from this.

Courtesy/Owned by AccuWeather Pro

Courtesy/Owned by AccuWeather Pro

Here comes those 60s.

Source: AccuWeather

Source: AccuWeather

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By Wednesday the system pulls east but a slightly positive NAO, the low, like the last pulls northeast up into Canada but we still see the front sweep into the I-95 late week. Note a pretty decent squall line with more heavy rainfall for the Ohio Valley.

Courtesy/Owned by AccuWeather Pro

Courtesy/Owned by AccuWeather Pro

As for the upper chart. Here’s the 500mb and 850 temps off the ECMWF and note the trough digging in over the Rockies with warming for the Northeast and Mid-Atlantic.

Geopotential3250032hPa32and32Temperature32at3285032hPa_North32America_24

Then another cold shot on the backside swings through the Lakes and eventually Northeast briefly.

Geopotential3250032hPa32and32Temperature32at3285032hPa_North32America_72

By the weekend another system crosses the northern tier up along the intl border but notice the flattening of the jet while Canada fills with colder air.

Geopotential3250032hPa32and32Temperature32at3285032hPa_North32America_120

By early next week the ECMWF has a west-east flow along the Canada border with tremendous cold filling Canada thanks to a cross-polar flow. That’s not dropping into the US apart from perhaps the far northern counties of ND, MN, UP Michigan thanks to a near neutral NAO and PNA. The AO remains strongly positive.

Geopotential3250032hPa32and32Temperature32at3285032hPa_North32America_168

It looks like for at least the front end of November, we’ll see a mainly flat upper pattern with mild Pacific air flowing freely across most of the country but there’s a slight bias towards a western trough which MAY try to swing further east towards month’s end.

More tomorrow.

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