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Today's Weather Outlook

UPDATED 6:30 AM EST, December 18, 2012

UPDATED By WeatherBug Meteorologist, Fred Allen

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As if the Northeast needs another reason to believe meteorological winter has arrived, a fresh low pressure will bring more snow to northern New England today. An influx of Pacific moisture will keep the snow machine cranking in the Mountain West, while the Southern-Tier and Plains remain dry.

WeatherBug Meteorologist Todd Nelson has the latest in this exclusive WeatherBug National Outlook.

Low pressure will dart into the Northeast today, bringing a wintry mix of snow, sleet and even a bit of freezing rain to central and northern New England. Several inches of snow will fall along the northern fringe of the storm system in New Hampshire and Maine, while rain pelts the populated Interstate 95 corridor.

Rain showers mixed with snow will move in behind the low across the eastern Great Lakes while gusty northwest winds will finally take away all the gray and fog-filled sky for the Mid-Atlantic.

The other significant weather-maker across the U.S. will extend from the West Coast into the Dakotas. A trifecta of low pressure systems will squeeze out mountain snow from the Washington Cascades to the Sierra Nevada, as well as from the higher terrain of Nevada into the central Rocky Front Range. Several inches of snow will make travel difficult at the higher mountain passes. Even a bit of light snow will slide across the Dakotas and into northwestern Minnesota today.

It will be a different story for the Interstate 5 corridor from Seattle to San Diego, where periodic rain will have wipers working full time. As colder air wraps into the northern fringes of the storm system, the rain showers could briefly end as a few snowflakes for Seattle and Portland, Ore.

The rest of the U.S., including the southern Rocky Front Range into much of the Plains, Southeast and the Sunshine State, will enjoy very un-December-like weather. Not only will there be plenty of sunshine, but temperatures will rival that of mid-November with Arctic air bottled up in Canada.

Temperatures will range from the seasonably chilly 10s and 20s across the West Mountains and along the far U.S. Northern-Tier, with rather toasty-like 60s, 70s and even a few lower 80s from Texas through Florida. In between, comfortable 30s, 40s, and 50s will rule the U.S.

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