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Related phrases:   flash flood warning   flash flood watch                    

Definitions of flash flood:

• A flood that rises and falls quite rapidly with little or no advance warning, usually as the result of intense rainfall over a relatively small area.
  www.krdotv.com/WeatherDef.asp
• A flood that occurs within a few hours (usually less than six) of heavy or excessive rainfall, dam or levee failure.
  ggweather.com/glossary.htm
• A flood which is caused by heavy or excessive rainfall in a short period of time, generally under 6 hours, leading to water that rises and falls quite rapidly. The term may also be used to alert the public of non life threatening flooding of small streams, streets, storm drains, and low lying urban areas. A flash flood can also be caused by the failure of a dam or from ice jams on waterways.
  www.weca.org/nws-terms.html
• a sudden and destructive rush of water down a narrow gully or over a sloping surface, caused by heavy rainfall.
  www.pnl.gov/atmos_sciences/Cdw/Glossary.html
• Rapid rises in water in streams, creeks and storm drains that pose a threat to life and property. Flash floods are usually caused by excessive rainfall but ice jams and dam or levee failures can also cause flash flooding.
  www.cookcountysheriff.com/ema/glossary.html
• Flood of very high discharge and short duration; sudden and local in extent. (See page(s) 316)
  highered.mcgraw-hill.com/sites/0072402466/student_view0/chapter13/glossary.html
• A sudden rise in river or stream levels causing flooding.
  www.ametsoc.org/amsedu/WES/glossary.html
• a sudden flood caused by heavy rain and or the rapid melting of snow. A flood crest is the highest level reached before the water recedes.
  members.tripod.com/~MitchellBrown/almanac/weather_glossary.html
• A dangerous and sudden flood that threatens lives and property and usually occurs after heavy rain. May also occur after an ice jam breaks up or after a dam breaks.
  weathereye.kgan.com/cadet/disaster/glossary.html
• The result of heavy or excessive amounts of rainfall within a short period of time, usually less than 6 hours, causing water to rise and fall quite rapidly.
  ks.water.usgs.gov/Kansas/waterwatch/flood/definition.html
• Flooding with rapid water rise.
  www.carlwozniak.com/clouds/glossary.html
• A flood that crests in a short period of time and is often characterized by high velocity flow. It is often the result of heavy rainfall in a localized area.
  www.hiltonheadislandsc.gov/Safety/hurricane/terms.html
• A flood that occurs during unusually intense rainfall or as the result of a dam collapse, during which the floodwaters rise very fast.
  www.wwnorton.com/college/geo/earth2/glossary/f.htm
• Sudden fast-moving flow of water, usually from heavy rainfall.
  www.tictoc.co.uk/Phase3/Resource/glossary.html
• a sudden local flood of great volume and short duration
  wordnet.princeton.edu/perl/webwn
• A flash flood (also a freshet) is a rapid flooding of low-lying areas, rivers and streams that is caused by the intense rainfall associated with a thunderstorm, or multiple training thunderstorms. Flash flooding occurs when the ground under a storm becomes saturated with water so quickly that it cannot be absorbed. The runoff collects in low-lying areas and flows rapidly downhill. As a result, anything in its path is suddenly in rising water. ...
  en.wikipedia.org/wiki/Flash_flood

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