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Weekend Weather Outlook

UPDATED 9:30 AM EST, December 15, 2012

UPDATED By WeatherBug Meteorologist, John Bateman

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A fairly active weather weekend pattern will be on tap across the U.S., with a splash of winter from the northern Plains to New England, while another coastal storm moves onshore in the West. Meanwhile, warm temperatures and even a few thunderstorms will sweep the South.

WeatherBug Meteorologist Addison Green has the latest in this exclusive WeatherBug National Outlook Video.

Today:

A storm rolling off the Rockies will rocket into the Midwest today, spreading rain into the western Great Lakes, including Chicago, Milwaukee and Detroit. However, further to the north a wintry mix will bring freezing rain, sleet and snow from central Minnesota to Michigan`s Upper Peninsula.

On the other end of the weather spectrum, this same storm will drag a cold front across the Mississippi Valley and into Texas, and this will produce a few afternoon thunderstorms.

Along the West Coast a Pacific storm will race onshore, dumping rain from Seattle to northern California. However, the rain will turn to heavy snow for the high elevations of the Cascade Range and Sierra Nevada. Another weaker disturbance will provide generally light snow across the central and southern Rockies.

A broad area of high pressure will provide tranquil weather and plenty of sunshine along the East Coast, with only a couple of showers possible across Florida and the Carolina Coast. Sunny skies will also be found throughout the Plains from the Dakotas to west Texas.

The cold spots today will be in the northern Plains and northern New England, where highs will only climb into the teens and low 20s. Slightly warmer 30s and 40s will be found from southern New England to the Great Lakes and most of the Rockies. Meanwhile, unseasonably warm 50s, 60s and 70s will dominate from the Ohio Valley to the Deep South, with additional 50s and 60s in the Southwest and West Coast.

Sunday:

The same main weather features from today will again be in play to close out the weekend, only moving farther to the east. The storm located in the Great Lakes will drape a warm front across New England. South of the front, showers will be the rule for the Mid-Atlantic, while thunderstorms will threaten the Deep South and Gulf Coast.

North of the same warm front, a wintry mix will break out for northern New England and northern New York, making driving difficult and even dangerous.

The storm in the West will continue bringing moisture onshore, with showers spreading from Seattle to San Francisco. In addition, the higher elevations of the Cascades, Sierra Nevada and northern Rockies will continue to see snowfall from this system.

The quietest weather in the U.S. will once again be found in the Plains, as high pressure dropping down from Canada will bring abundant sunshine.

Cold air moving out of central Canada will keep the northern Plains frigid on Sunday, with highs only reaching the teens and low 20s. The rest of the Northern Tier will see widespread 30s. However, mild air will continue to rule much of the U.S., with 40s and 50s from the Mid-Atlantic to Southwest, and toasty 60s and 70s dominating the Southeast and southern Plains.

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