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    Wall Cloud - Hagerstown, Indiana

    08/19/2009


    Photographer's description: State Road 38 and Jacksonburg Road I was facing North.

    Photographer Jim Scott - NWS Spotter
    Date taken August 19, 2009
    Location Near Hagerstown, IN  (Wayne County)     map
    Event Wall Cloud

    Additional notes

    This well-defined wall cloud was from a supercell thunderstorm that produced a weak tornado near Greenville, Ohio. 

    A seen here, a wall cloud is a localized, persistent, often abrupt lowering from a rain-free base. Wall clouds can range from a fraction of a mile up to nearly five miles in diameter, and normally are found on the south or southwest (inflow) side of a supercell thunderstorm. When seen up close, many wall clouds exhibit rapid upward motion and counterclockwise rotation.

    Rotating wall clouds usually develop before strong or violent tornadoes, by anywhere from a few minutes up to nearly an hour. Wall clouds should be monitored visually for signs of persistent, sustained rotation and/or rapid vertical motion.

     


     

     


     

     




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