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Climatology of heavy rainfall associated with tropical cyclones affecting the central Appalachians
  • Published Date:
    2005
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Climatology of heavy rainfall associated with tropical cyclones affecting the central Appalachians
Details:
  • Corporate Authors:
    United States, National Weather Service ; United States, National Weather Service., Eastern Region., Scientific Services Division, ;
  • Description:
    Over 50 years (1950-2004) of rainfall events associated with tropical cyclones that affected the central Appalachians were examined. Tracks of tropical cyclones (or tropical depression remnants) that passed within 500 km of the National Weather Service Office in Blacksburg, VA were compared with associated rainfall analyses of the Appalachian region in Virginia, West Virginia, and northwest North Carolina. In addition, surface and upper air analyses were examined for each event to help determine the relative influence of factors such as upslope flow, overrunning, and boundary interaction in relation to the cyclone track on the specific location and amounts of precipitation. The speed of movement across or along the Appalachians, as well as intensity of the cyclone (maximum wind speeds) as it passed through the analysis area, was also considered. The events were divided into categories based on the location the tropical cyclone made landfall. The seasonal distribution, e.g., which specific months are favored for tropical cyclone activity in the region, is also shown. These data were compiled in order to provide forecasters with a climatological database of tropical cyclones affecting the area, as well as the rainfall from these events. Results of the study will aid forecasters when assessing the potential effects of future tropical cyclone tracks and their rainfall impact on the Central Appalachians.

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