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Updated: 12:00 PM GMT on April 18, 2014
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Weather Underground Forecast for Friday, April 18, 2014

A low pressure system will move northeastward across the eastern Gulf Coast on Friday, while a cold frontal boundary will extend across the northwestern corner of the country.

A cold front will shift across the Southeast on Friday. Scattered showers and thunderstorms will develop over the region as this system interacts with a warm, muggy air mass moving northward from the Gulf of Mexico. Just to the southwest of this frontal boundary, an area of low pressure will deepen and drift across the central and eastern Gulf Coast. Much heavier rain and thunderstorms will accompany this system, which could lead to flash flooding over northern Florida, southeast Georgia and southern South Carolina. High pressure should keep conditions mostly calm across the southern Plains and the middle Mississippi Valley.

Meanwhile, a separate cold front will trek eastward over the upper Midwest, the Great Lakes and the Ohio Valley. This system will push showers across the region, while a mixture of rain and snow will be possible along the northern tier of the country. By the late afternoon and evening, wet weather will move over portions of the Northeast.

Out west, a cold frontal boundary will propagate across the Pacific Northwest and the Intermountain West. Several waves of low pressure will accompany this system, providing rainy weather to Washington, Oregon, northern California and northern Nevada. A mixture of rain and snow will also push across the Cascades and the northern Rockies. Precipitation will move into the northern Plains by the evening. Just south of this frontal boundary, scattered thunderstorms will be possible across the Great Basin, the central Rockies and the Four Corners.


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