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Weather Underground midday recap for Thursday, July 24, 2014
A cold front extended from the southern Plains to the Mid-Atlantic on Thursday, while a strong low pressure system moved over the northern Plains.
A strong area of low pressure moved eastward over the northern Plains. This system collided with a warm, humid air mass from the Gulf of Mexico to initiate strong to severe thunderstorms over the nations midsection. Severe thunderstorm warnings were issued in southwest Minnesota as a cluster of severe thunderstorms pushed across eastern North Dakota, eastern South Dakota, western Minnesota and northwest Iowa. Stone Bridge, S.D., reported 1.75 inch sized hail, while Trosky, Minn., reported 1.25 inch sized hail. In addition, heavy rain accompanied these thunderstorms, as Tioga Municipal Airport, N.D., reported a midday total of 0.57 inches of rain. High pressure kept conditions mostly clear across the southern Plains.
Meanwhile, a cold front extended across the southern Plains, the lower Mississippi Valley, the Tennessee Valley and the Mid-Atlantic. A low pressure system along the eastern end of the frontal boundary ushered rain and thunderstorms across parts of the Southeast, the Tennessee Valley and the Mid-Atlantic. The strongest thunderstorms focused over the Mid-Atlantic, as severe thunderstorm warnings were issued in several states. Franklin, Va., reported 1.00 inch sized hail, while Greenville, N.C., reported a midday total of 1.43 inches of rain.
Scattered monsoonal thunderstorms developed over the Four Corners on Thursday as high pressure drew moisture from the Gulf of Mexico. Along the West Coast, an onshore flow pushed showers across the Pacific Northwest. The Desert Southwest remained warm and dry, as heat advisories were issued across southern California. Needles, Calif., recorded a midday high of 109 degrees.