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Weekend Weather Outlook

UPDATED 10:30 AM EST, January 12, 2013

By WeatherBug Meteorologist, Chad Merrill

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The floodgates will unleash the coldest air in decades deep into the Southwest while spring-like weather seeps into the East. The battleground between the air masses will set off stormy weather from the Mississippi Valley into the Northeast.

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

Today:

A huge dip in the jet stream will drive some real January weather into the West while the snow machine winds down across the Mountain West and Northern Plains.

Temperatures will start out below freezing as far south as Phoenix and only climb into the 40s and 50s from the Sacramento Valley deep into the Southwest. Widespread single digits and teens will round out afternoon readings from the Northern Plains into the Mountain West with 30s and 40s along the Northwest Coast.

Snow showers will linger across the Wasatch, Rockies and Northern Plains but accumulations will be less than 3 inches. Increasing north winds will create dangerous wind chills of minus-20 to minus-30 degrees across the Dakotas.

On the flip side of the cold western U.S. pattern, the East will enjoy spring warmth. Highs will climb through the 70s from eastern Texas into the Mid-Atlantic with widespread 50s and 60s through the Mid-Mississippi Valley, Great Lakes and southern New England. After some morning freezing drizzle, upstate New York and New England will only reach the 40s this afternoon.

The battleground between the colder West and warmer East will help develop a storm system in the Mid-South today. Severe thunderstorms are possible ahead of the low and associated cold front from eastern Texas into Arkansas with showers as far north as the Ohio Valley.

Sunday:

The only real change to the weekend weather pattern will be the colder air sliding a bit farther east into the Midwest on Sunday.

Instead of 50s across the Mid-Mississippi Valley and Midwest, highs will only reach the upper 20s to lower 30s.The front spreading the cold air eastward will be accompanied by a brief period of snow early Sunday from the Mid-Mississippi Valley into the Great Lakes.

A line of heavy showers and embedded thunderstorms ahead of the front will slide into the Ohio Valley and Deep South by nightfall with showers reaching as far north as Vermont and New Hampshire. Once again, highs will reach the 50s, 60s and 70s in the East with slightly cooler upper 40s in the Northeast.

Other than a few snow showers cresting the Rockies, the West will remain dry but chilly. The Rockies and Wasatch will stay in the single digits, teens and 20s. Temperatures will remain in the upper 30s in the Pacific Northwest.

Much of California will see another round of 50s while the Southwest only warms into the 40s and 50s after another frosty morning with lows in the 20s and 30s.

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