Flash Flood Warning A Flash flood Flood Warning being issued on April 20, 2012. Event Code FFW Event Level Warning Type Original optional code TV Possibly Radio Possibly Cell Phone Yes NOAA Weather Radio Yes A Flash Flood Warning : FFW is an alert issued through the that warns the public when a flash flood is imminent or is already occurring in the warned area.
A flash flood is a sudden, violent flood after a heavy rain, or occasionally after a dam break. Rainfall intensity and duration, topography, soil conditions, and ground cover contribute to flash flooding.
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A flash flood after a thunderstorm in theMongolia A flash flood is a rapid of low-lying areas:, and. It may be caused by heavy associated with a,or from ice or snow flowing over ice sheets or snowfields. Flash floods may also occur after the collapse of a natural oror a human structure such as a man-madeas occurred before the of 1889.
Flash floods are distinguished from regular floods by having a timescale of fewer than six hours between rainfall and the onset of flooding. Flash floods are a significant hazard, causing more fatalities in the U. Flash floods can also...
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