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A flash flood warning (SAME code: FFW) is a severe weather warning product of the National Weather Service that is issued by national weather forecasting agencies throughout the world to alert the public that a flash flood is imminent or occurring in the warned area. A flash flood is a sudden, violent flood after a heavy rain, or occasionally ...
A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing over ice sheets or snowfields. Flash floods may also occur after the collapse of a natural ice or debris dam ...
Flash flood watch. 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 ...
Flash flood warning. One alert seemed especially ominous in real time: “Flood emergency is in effect. This is an extremely dangerous and life-threatening situation.
According to an NWS post on X, formerly known as Twitter, Sioux Falls has already accumulated 0.51 inches of rainfall in the past 24 hours. The heavy rainfall may lead to flooding in urban areas ...
About 1 million people in Suffolk County, N.Y., were issued a flash flood emergency warning early Monday morning. Flash flood warnings were issued for several counties north and west of New York ...
Flash flood emergency (FFS) – A flash flood emergency is a high-end usage of the flash flood warning. The flash flood emergency term is used when widespread flooding is occurring, and either, multiple water rescues have been reported in the past few hours, or if highly populated regions are undergoing significant flash flooding likely to ...
The warning is in effect until 5 a.m. Ways to stay safe during a flood according to the NWS. For either residents or campers of flood-prone, low-lying areas, take immediate action and seek higher ...