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[2] [6] The system then provides information on rainfall and hydrologic response, the two important factors in determining the potential for a flash flood. [4] [7] The system is based on the concept of flash flood guidance and flash flood threat. Both indices provide the user with the information needed to evaluate the potential for a flash ...
This type of watch is usually only reserved for forecast "high-end" flash flood events. Flash flood warning FFW – Flash flooding—either indicated by Doppler weather radar or stream gauges, or reported by Skywarn spotters or local emergency officials—is occurring, imminent, or highly likely in the short term. A flash flood is a flood that ...
In addition, some NWS Weather Forecast Offices have instituted an enhanced flash flood warning, referred to as a flash flood emergency (or as termed by the Albany, New York office as a flash flood warning emergency [5]), which indicates a severe flooding situation in densely populated areas, similar to the procedure for declaring a tornado ...
Flash floods can happen minutes to hours after a period of excessive rainfall or a sudden release of water from a dam failure or ice ja A foot of moving water can carry away a vehicle.
A flash flood watch (SAME code: FFA; also referred as a "green box" by meteorologists) is severe weather watch product of the National Weather Service that is issued when conditions are favorable for flash flooding in flood-prone areas, usually when grounds are already saturated from recent rains, or when upcoming rains will have the potential ...
Additionally, the scientific understanding of floods, the associated risks, and damages and changing weather systems behind flood events have also continually developed. With Risk Rating 2.0, FEMA ...
a flash flood watch means that conditions may develop that lead to flash flooding. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED.
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