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The nations weatherThe nation's weather
Weather Underground Forecast for Monday, December 19, 2011.
A storm system moving into the Southwest will bring significant winter weather from the Southwest through the Central and Southern Plains from Sunday night through Monday and into Tuesday. This system will pick up increased Gulf moisture as it progresses eastward, allowing precipitation to reach into Texas and Oklahoma. Meanwhile, a frontal boundary from the north will drop southward with plenty of cold air that will support a precipitation changeover to snow. These elements will allow portions of eastern Arizona through New Mexico, the Texas and Oklahoma Panhandles, Kansas, and southeastern Colorado to experience new snow accumulations of up to 6 to 12 inches with areas of locally heavier snowfall. In addition to snowfall, a tight pressure gradient will lead to strong wind gusts greater than 40 mph and blizzard like conditions. Winter Weather Advisories and Winter Storm Warnings will remain in effect for eastern Arizona and western New Mexico, while Winter Storm Watches and Blizzard Watches remain in effect for much of eastern New Mexico through the Texas and Oklahoma Panhandles, Kansas, and southeastern Colorado. By the late afternoon and evening, thunderstorms affecting eastern Texas will have a slight chance of turning severe with an isolated/marginal damaging wind and tornado threat.
Outside of this region, rain showers will form ahead of the cold front extending from the Southern Plains through the Ohio Valley and into the Lower Great Lakes. In the West, a ridge of high pressure rebounds over the Pacific Northwest for dry weather. Expect fog to remain until very late in the inland valleys. Temperatures in the Lower 48 states Sunday have ranged from a morning low of -9 degrees at Saranac Lake, N.Y. to a high of 79 degrees at Ft Lauderdale, Fla.
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