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The nations weatherThe nation's weather
Weather Underground Forecast for Thursday, December 15, 2011.
Wet weather moves into the East, while rain and snow develop across the Pacific Northwest on Thursday. A low pressure system moves over the Great Lakes and into eastern Canada. This system will continue pushing a strong cold front eastward, which will make its way to the Northeastern US. This front will extend down the Ohio River Valley and through the Mississippi Valley, where it will produce more heavy rain showers. Rainfall totals will range from 1 to 2 inches in most areas. However, additional energy from the Gulf of Mexico may allow for scattered showers and thunderstorms in the South. Thunderstorms may develop from eastern Texas through the Tennessee Valley. In the North, the back side of the low pressure system will push cooler air into the Great Lakes and Upper Midwest, allowing for light freezing rain and light snow flurries to develop. Significant precipitation is not likely in these areas as the system passes to the east. Lake effect snow showers will develop along downwind shores across the Great Lakes. These areas may see 1 to 2 inches of new heavy and wet snow.
In the West, a low pressure system moves over the Pacific Northwest and pushes a cold front southward through California. This will produce rain across the Pacific Northwest and northern California, with snow likely at higher elevations. Expect 1 to 3 inches of snow in the Cascades and northern Sierras. Temperatures in the Lower 48 states Wednesday have ranged from a morning low of -2 degrees at Big Piney, Wyo. to a high of 86 degrees at Falfurrias, Texas
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