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Associated Press

Posted on May 5, 2014 at 4:05 PM

Updated Monday, May 5 at 4:07 PM

Weather Underground midday recap for Monday, May 05, 2014

A cold frontal boundary extended from the West Coast to the upper Intermountain West on Monday, while a separate frontal boundary extended from the central Plains to the southern Mid-Atlantic.

A cold frontal boundary associated with an area of low pressure stretched from central California to southwest Montana, which brought unsettled weather to the northwestern corner of the country. An onshore flow from the Pacific ushered scattered showers across Washington, Idaho, Oregon and northern California, while higher elevations experienced scattered snow showers. Arcata, Calif., reported a midday total of 0.61 inches of rain, while Shelton, Wash., reported a midday total of 0.49 inches of rain. Winter weather advisories were issued across parts of the Sierra Nevadas and into the Great Basin as precipitation began to spread southeastward.

A ridge of high pressure remained in place over the Four Corners, as warm, dry conditions lingered across the Desert Southwest and the southern Plains on Monday. Altus, Okla., recorded a midday high of 99 degrees, while Vernon, Texas, recorded a midday high of 98 degrees.

Meanwhile, a frontal boundary extended from the central Plains to the southern Mid-Atlantic, which kept conditions much cooler across the north central and northeastern portions of the country. Conditions were especially cool across New England, as Mount Washington, N.H., recorded a morning low of 26 degrees. Scattered showers and thunderstorms also developed over the Ohio Valley and the Mid-Atlantic due to a wave of low pressure across the region. High pressure kept conditions warm and dry across the Gulf Coast and the Southeast on Monday.

Temperatures in the Lower 48 states Monday have ranged from a morning low of 26 degrees at Mt. Washington, N.H. to a midday high of 99 degrees at Altus, Okla.

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