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Associated Press

Posted on December 31, 2012 at 6:35 AM

Updated Monday, Dec 31 at 6:36 AM

Weather Underground Forecast for Monday, December 31, 2012.

An active weather pattern is expected to progress from the Southwest through the Ohio Valley this New Years Eve as an upper level trough of low pressure moves through the Central U.S. and an active jet stream supplies moisture to the South from the tropics. As the low shifts across the Plains, accumulating snowfall will become possible from parts of the Texas and Oklahoma Panhandles, through Kansas and into Missouri and southern Illinois. Snow in the these areas may be heavy at times, especially during the afternoon and evening hours, and may be accompanied with periods of freezing rain. Snow totals of 1 to 3 inches are anticipated in the panhandles, while 2 to 4 inches with isolated amounts up to 5 inches accumulate from areas of Kansas through southern Illinois. Expect snow showers to spread into the Ohio Valley through Monday night. Meanwhile to the south, rain showers are expected to fall along and ahead of an associated cold front from areas of the Southern Plains through the Tennessee Valley. Weak instability associated with this front will allow for a few thunderstorms to accompany wet weather activity in southeastern Texas.

Elsewhere in the nation, a frontal system will bring moderate snow showers to the Upper Peninsula of Michigan and downwind of Lakes Ontario and Erie in western New York. Out West, the next weather system is expected to reach the Pacific Northwest Coast then dive south in the afternoon. This will bring a threat of precipitation to the area through the afternoon and evening.

Temperatures in the Lower 48 states Sunday have ranged from a morning low of -22 degrees at Kremmling, Colo. to a high of 72 degrees at Harlingen, Texas

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