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Weather Underground Forecast for Friday, Dec. 13, 2013
A cold frontal boundary is expected to stretch from the central Plains to New England on Friday, while an onshore flow will push precipitation across the Pacific Northwest.
A cold front will move southeastward over the central and eastern thirds of the country on Friday. Temperatures will remain 10 to 20 degrees below normal across the Plains, the Midwest and into the Northeast, while snowy conditions will push across the Great Lakes. Lake effect snow is expected to develop downwind of the Great Lakes, which will provide heavy snow showers to parts of New York. This frontal boundary will also push heavy snow across the middle Mississippi Valley and into the Ohio Valley on Friday. Just south of this system, rain and thunderstorms will be possible as a warm, muggy air mass from the Gulf of Mexico will trigger stormy conditions. A frontal boundary will also linger along the southern coast of Florida, as spotty showers and thunderstorms will be possible over the southern tip of Florida.
A low pressure system will linger over the border of New Mexico and Mexico, which will usher rain across New Mexico and snow showers over the central Rockies.
Meanwhile, an onshore flow will push wet weather across the Pacific Northwest on Friday. Showers are likely to occur along western Washington, western Oregon and northwestern California. This system is also expected to trigger snow showers across the Cascades and into the northern Rockies on Friday. Southern California will stay clear of wet weather.