| Modernized areal flash flood guidance - :13498 | National Weather Service (NWS)
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Modernized areal flash flood guidance
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    The National Weather Service (NWS) must establish uniformity in determining flash flood guidance (FFG) for small streams in counties and urban areas to take advantage of the approaching availability of both the Advanced Weather Interactive Processing System (AWIPS) and much finer resolution precipitation estimates from the WSR-88D radars. This paper describes the development and enhanced procedures at the River Forecast Centers (RFCs) for generating areal FFG for small streams. The goal is for more accurate and more consistent areal FFG based on (1) a uniform and objective method of deriving threshold runoff and (2) a standard algorithm to compute flash flood guidance.

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