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Updated: 4:30 AM GMT on April 18, 2015
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Weather Underground Forecast for Saturday, April 18, 2015

A low pressure system will continue to bring impacts to the central third of the country on Saturday, while a ridge of high pressure will linger over the West Coast.

A strong area of low pressure will inch north northeastward over the central Plains. This system will continue to usher moderate to heavy snow showers over the central Rockies. Winter storm warnings are in place for eastern Utah, Colorado and southern Wyoming. In addition, this system will draw moisture from the Gulf of Mexico, which will fuel strong to severe thunderstorms across northeast Colorado, southern Nebraska, Kansas, western Oklahoma and northern Texas. Heavy rain and severe thunderstorms are also expected to develop across the western and central Gulf Coast. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, flash flooding will be possible in eastern Texas, Louisiana, southern Mississippi and southwest Alabama. There will also be chances of disorganized showers and thunderstorms across the middle and upper Mississippi Valley, the Tennessee Valley, the Ohio Valley and the Southeast on Saturday.

Meanwhile, a trough of low pressure is expected to bring light to moderate rain to New England. Cold air in place over northern New England could lead to light snow accumulations over northwest Maine.

Out west, a ridge of high pressure will persist over the eastern Pacific. This high pressure will keep conditions dry from the Pacific Northwest to the Southwest.

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