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    A Flash Flood Parameter Investigation

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    surc/2015/schedule/259/fulltext (1).pdf (26.10Kb)
    Date
    2015-04-10
    Author
    Sojda, Jacob V.
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    Abstract
    This study attempts to develop a parameter that can accurately indicate favorable conditions for flash flooding based on vertical and horizontal extent of moisture. The equation developed to obtain the parameter uses mean relative humidity from two levels and the integral of specific humidity throughout the column. This study investigates whether the developed parameter is a viable indicator of flash flooding conditions. Flash flood cases in the states of New York and Pennsylvania were selected using the National Climatic Data Center’s (NCDC) storm report archive and categorized by magnitude and storm type using geographical coordinates and archived radar imaging. The parameter value was then calculated and recorded using archived North American Regional Reanalysis (NARR) data, displayed graphically and numerically using GRADS. Parameter values were recorded for the nearest model run before, nearest to the beginning, and nearest to the maximum rainfall rate, as indicated by radar, of the event. Statistical analysis of the results tests for significance of the parameter values while a visual analysis tests whether the spatial distribution of significant values is useful for forecasting. Further research is still necessary to test it against a control, specifically how frequently the parameter accurately foretells of a flash flood event.
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    http://hdl.handle.net/1951/72702
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