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National Weather at 235pm December 10 2004


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Exiting Northeast and entering Northwest

2:35 P.M. ET 12/10/2004


M. Ressler, Meteorologist, The Weather Channel





As the stormy low-pressure center shifts into northern New England Saturday and the front completes its swing through the Northeast and out into the Atlantic, precipitation will linger from Maine to West Virginia while ending in the Northeast Corridor cities from Boston to Washington. Rain showers will mix with or change to snow from western New York to southwest Virginia. Showery rains will linger from the Hudson Valley to coastal Maine. Snow and freezing rain plague colder areas along the Canadian border. The northernmost counties in New York and Maine will be the big snow winners by late Saturday with accumulations well over 1 foot possible. Temperatures Saturday will range from near average to 12 degrees above average. On Sunday, the eastern storm will exit into New Brunswick and Nova Scotia, taking the last snow showers away from northern New England. Right on its heel, a new blustery low-pressure system and cold front will approach with increasing showers for Upstate New York and western Pennsylvania. The low and cold front will move eastward through the region Monday, accompanied by a quick shot of morning showers in southern New England and the eastern Mid-Atlantic plus increasing snow and snow showers from Maine to West Virginia. Colder gusty northwest winds will belatedly rev the Erie and Ontario lake effect snow machines which will chug out the flakes into Tuesday before turning off again. Temperatures will be a chilly 5 to 15 degrees below average Tuesday and Wednesday.



Snow and rain showers will linger in Lower Michigan and the Ohio Valley on Saturday as the eastern storm slowly exits. Daytime temperatures will range from near average to 5 degrees below average. Meanwhile, a warm gusty southwesterly-to-westerly flow out ahead of a new cold front will boost daytime temperatures to between 15 and 30 degrees above average in the Plains which means spring-like highs in the 50s and 60s for the first part of the weekend. The windy cold front will rocket through the Plains and Midwest Saturday night and Sunday. The only precipitation with this moisture-starved system will be around the Great Lakes where rain will quickly change to snow. Lake effect snow, once underway later Sunday, will linger into Tuesday and some locally significant accumulations could occur over Upper Michigan, western Lower Michigan, northwest Indiana and northeast Ohio. By Monday, temperatures will finally be slightly below average region-wide.



After another wet and stormy week, the South will finally dry out this weekend. Wrap-around rain and mountain snow showers from the exiting storm will clip eastern Tennessee and the southern Appalachians Saturday. Temperatures will be a chilly 5 to 10 degrees below average for much of the region east of the Mississippi while soaring to between 5 and 16 degrees above average in the southern Plains. Later Sunday and Monday, a new, but dry cold front will sweep southward through the region. A massive area of high pressure will build in immediately behind the cold front. A few snow showers could clip the southern Appalachians Monday while a few showers could pop in the better moisture lingering ahead of the front in southern Florida. Daytime temperatures will range from 10 degrees below in Florida to 15 degrees above average in Texas on Sunday ahead of the front. Temperatures will be around average region-wide on Monday and 5 to 10 degrees below average on Tuesday as the much cooler air settles in. Highs Tuesday will range from 40s and 50s over most of the region to the 60s in south Texas and the 60s and 70s over the Florida Peninsula.



A windy Pacific cold front will race through the Northwest Saturday, aligning itself from northeast Montana to northern California by late in the day. Showers and mountain snow will accompany and linger behind the front. Snow levels will plummet to 2000 feet in the Washington Cascades. South of the active weather, fog will again be a problem Saturday morning in the Central Valley of California and in the Bay Area. The front will rapidly dive southward through the high Plains of Wyoming, Colorado and New Mexico on Sunday but languish over southwest Wyoming, southern Idaho and Oregon. Sunday and Monday, an upper-level disturbance off the Northwest coast will spark showers and mountain snow from parts of Washington, Oregon and northern California into the northern and central Rockies. Tuesday through Thursday, the upper-level disturbance will slip into the Northwest and then dive southward into the Southwest, spreading generally light rain and snow showers along its track and returning temperatures nearer to average.

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