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Weekend Weather Outlook

UPDATED 7:15 AM EST, December 1, 2012

UPDATED By WeatherBug Meteorologist, John Bateman

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The calendar flip into December will bring a few unusual, but significant, weather changes to the central and eastern U.S. The Pacific Northwest and West Coast will remain stuck in its stormy slump, while the U.S. Northern Tier battles a few storms of its own.

WeatherBug Meteorologist Bryan Karrick has the latest in this exclusive WeatherBug National Outlook Video.

Today:

Three weather systems will dart across the U.S. Northern Tier today, ushering in December like a "lion" as opposed to a "lamb." The most significant of which will test storm-weary residents across the Northwest into California, with another quick-hitting blast of mountain snow and soaking valley rain. Wipers will be working at full blast along the Interstate 5 corridor, while snow will be whipped about by gusty winds as far east as the northern Rocky Front Range.

A second disturbance will skim along the U.S. and Canada border, producing a smattering of nuisance showers from the Missouri Valley to the Great Lakes. However, a few of those showers may fall as a wintry mix of freezing rain and sleet across northern Minnesota, making for treacherous travel early in the day.

The only other weather hiccup across an otherwise tranquil U.S. will be found in New England. Here, a band of light snow will dust the ground.

The week`s frigid air will retreat from the U.S., with only the Dakotas, northern Minnesota and much of New England not getting out of the 20s and 30s. The Northwest, Mountain West and Midwest into the Mid-Atlantic will climb into the 40s and 50s, while the U.S. Southern Tier and Central Plains through the Carolina Atlantic Seaboard rise into the 60s, 70s, and a few very low 80s.

Sunday:

Yet another powerful storm system will squeeze out more flooding valley rain and heavy mountain snow at the higher passes from the Pacific Northwest and California into the northern Rocky Front Range and Mountain West on Sunday. Just like today, gusty winds will blow about the flakes as they fly, making travel dangerous and roads potentially impassable. For the lower elevations, flooding will be on the rise.

The other weather blip will stretch from New England to the Lower Mississippi Valley on Sunday, where a cold front will touch off a band of showers. Surprisingly, the only hint of wintry weather will be found across northern Maine, where a bit of a wintry mix will be in the cards early in the day.

The biggest weather news across the U.S. will be the flood of un-December-like warmth. Even despite the two stormy areas, temperatures will be unseasonably mild across all of the U.S. A few upper 30s will creep into the U.S. Northern Tier, while 40s and 50s stretch from California and the Northwest, all the way to New England. The rest of the U.S. will see 60s, 70s and even a few more very low 80s will pop up in south Texas and Florida.

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