Thunder Ahead Of Cold Blast

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A deep trough of low pressure up around 18,000 feet is forecast to sweep east into the mid Atlantic states this weekend. The strong jet stream east of the trough (160 mph winds measured at 30,000 feet by the balloon launched near Detroit this evening) will combine with warm, moist air being drawn northward along the eastern seaboard to produce strong to severe thunderstorms along the advancing cold front. Late Friday evening tornado watches were posted for southwest Georgia, the Florida panhandle and much of South Carolina. Theses storms may develop farther north during the warmest part of the afternoon on Saturday. The cold front is forecast to move through Baltimore later Saturday evening, ending the severe storm threat. South winds will turn to the west and then northwest Saturday night into Sunday, ushering in a week of colder than normal temperatures with the possibility of snow on the west side of the Appalachian divide and maybe even a few flurries east of the mountains.

Tom Tasselmyer

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