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Weather Underground midday recap for Wednesday, August 27, 2014
A cold front extended from the central Plains to the Northeast on Wednesday, while a low pressure system moved across the Intermountain West.
A low pressure system moved slowly eastward over the Intermountain West on Wednesday. As this system interacted with monsoonal moisture over the Four Corners, strong to severe thunderstorms develop over the nations midsection. Thunderstorms affected the central Rockies and the central high Plains, as flash flood warnings were issued in southeast Wyoming. Torrington, Wyo., reported a midday total of 0.98 inches of rain. South Pass, Wyo., reported a midday total of 0.48 inches of rain. Additionally, thunderstorms developed over the central Plains and parts of the Midwest as a cold front extended across the central Plains, the middle Mississippi Valley, the Ohio Valley and the Northeast. Flash flood watches were issued in eastern Nebraska, while flood advisories were issued in northwest Missouri. Clarinda, Iowa, reported a midday total of 2.01 inches of rain. McCook, Neb., reported a midday total of 1.96 inches of rain. Meanwhile, excessive heat warnings and heat advisories were issued over the middle Mississippi Valley as warm, muggy air moved northward from the Gulf of Mexico.
A tropical disturbance along the northwestern corner of the Gulf of Mexico triggered isolated thunderstorms over the western and central Gulf Coast. High pressure kept conditions mostly clear across the Southeast and the Eastern Seaboard on Wednesday.