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Weekend Weather Outlook

UPDATED 12:15 PM EST, December 29, 2012

UPDATED By WeatherBug Meteorologist, Seth Carrier

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A full complement of winter weather will affect the U.S. during the last weekend of 2012. Snow, rain, and even some thunderstorms will be found, with Arctic air hanging around for good measure.

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

Today:

A developing storm will run up the East Coast today, bringing a quick burst of snow, heavy rain, and even a few thunderstorms to the Atlantic Seaboard. The snow will fall from the Great Lakes and eastern Plains, eastward into the central Appalachians and into the greater New York City area and New England. Snow accumulation exceeding 4 inches will be found over the mountainous interior and southern New England, with lesser amounts expected closer to the Atlantic Coast, in the central Mid-Atlantic and northern New England. The Baltimore/Washington metro area will be right on the line between snow and rain. Across the southern Mid-Atlantic, Carolinas and Southeast, temperatures in the 40s, 50s and low 60s will make the storm a heavy rainmaker. A few thunderstorms will even be possible across northern Florida and the Carolina beaches.

Arctic air wrapping around the coastal storm will keep the central U.S. bitterly cold today, even with plenty of late-December sunshine. Highs will only be in the single digits and teens across the Dakotas and Minnesota, with much of the upper Mississippi Valley and upper Midwest only seeing teens and low 20s. It will not get above freezing as far south as Ozarks and the south-central Plains and throughout the Rockies.

The West, outside of some coastal rain and mountain snow in central California and Washington, will also enjoy a quiet start to the weekend. Temperatures here will be in the 30s over the mountains, with the Pacific Coast seeing 40s, and Southern California and the Southwest seeing 50s and low 60s.

Sunday:

The winter storm hitting the East Coast today will speed off the coast very early Sunday, leaving behind a cold and windy day throughout the East Coast along with a few snow showers in northern New England. The wind will also produce lake-effect snow bands rolling off lakes Erie and Ontario. Temperatures will struggle to reach the freezing mark as far south as the Ohio River and the central Mid-Atlantic, with teens and 20s found in the Midwest, Great Lakes and northern New England.

The South and Southeast will be slightly warmer, but highs in the 40s and low 50s will still be well-below normal for this time of the year, despite plenty of sunshine. Even Florida will struggle to reach the low 70s as far south as Key West.

Outside of a bit of snow in the Rockies and Northern Plains, and a few showers in west Texas, the western half of the U.S. will have a quiet Sunday. Just like the East, temperatures will be cold for this time of the year, with highs in the 30s found throughout the interior West and into the southern Rockies, with California struggling to get into the upper 50s and low 60s as far south as San Diego and Los Angeles.

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