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Topic: Flash flood


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  flash flood
Flood of water in a normally arid area brought on by a sudden downpour of rain.
Flash floods are rare and usually occur in mountainous areas.
Because of the suddenness of flash floods, little warning can be given of their occurrence.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0031388.html   (0 words)

  
 FEMA: Flood
Floods are one of the most common hazards in the United States.
Flood effects can be local, impacting a neighborhood or community, or very large, affecting entire river basins and multiple states.
Flash floods often have a dangerous wall of roaring water that carries rocks, mud, and other debris and can sweep away most things in its path.
www.fema.gov /hazard/flood/index.shtm   (0 words)

  
 NOAA/NWS/OM/CUST/PUB/FF
Flash floods occur within a few minutes or hours of excessive rainfall, a dam or levee failure, or a sudden release of water held by an ice jam.
Most flash flooding is caused by slow-moving thunderstorms, thunderstorms repeatedly moving over the same area, or heavy rains from hurricanes and tropical storms.
Flooding along rivers is a natural and inevitable part of life.
www.nws.noaa.gov /om/brochures/ffbro.htm   (1900 words)

  
  Welcome to eotsweb.org
Flash Flood - 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.
A flash flood can also be caused by the failure of a dam or from ice jams on waterways.
Flash Flood Watch - Issued to indicate current or developing hydrologic conditions that are favorable for flash flooding in and close to the watch area, but the occurrence is neither certain or imminent.
www.eotsweb.org /weatherterms.php   (3107 words)

  
 Flash - Home
Flash floods are a serious problem in the Mediterranean region in particular, and in Europe in general.
Floods result from large weather systems with embedded severe thunderstorms that deposit large amounts of rainfall in short periods of time.
Since lightning activity can be detected and monitored continuously from thousands of kilometers away, we have set the goal of using lightning data to better nowcast (3-hour prediction) and forecast (24-48 hour prediction) the location, intensity and timing of heavy convective precipitation events.
flash-eu.tau.ac.il /index.php?option=com_frontpage&Itemid=1   (0 words)

  
 Ham-Shack.com : Our Sky Warn Page
In the average year, 10,000 severe thunderstorms, 5,000 floods, and over 900 tornadoes occur across the United States.
During the past 10 years, tornadoes, severe thunderstorms, and flash floods have killed nearly 2,300 people in the United States and injured thousands of others.
Because of storm spotter reports, such as those you provided, plus the addition of new technology and improved warning dissemination, this death toll was reduced by more than 800 from the previous 10 years.
www.ham-shack.com /skywarn.html   (314 words)

  
  Flash Flood!   (Site not responding. Last check: )
Flash floods occur in mountain streams - often in canyons; or flooding of dry washes.
Flash floods can occur even though it's not raining where you are.
A flash flood may come at you as a high wave of water.
noaa.kids.us /flashflo.htm   (112 words)

  
  III - In Case of a Flood
Flash flood watches are issued when heavy rain is occurring or is expected to occur.
Flood insurance is excluded under homeowners and renters policies, but it is covered under the comprehensive section of standard automobile insurance policies and some coverage is available for floods under special commercial insurance policies.
Flood insurance covers direct physical losses from floods and losses resulting from flood-related erosion caused by waves or currents of water exceeding anticipated cyclical levels and accompanied by a severe storm, flash flood, abnormal tide surge or a similar situation which results in flooding.
www.iii.org /individuals/disasters/floods/before   (439 words)

  
  Flash flood - Wikipedia, the free encyclopedia   (Site not responding. Last check: )
Flash flooding is rapid flooding of low-lying areas, rivers and creeks 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 Johnstown, Pennsylvania dam break of 1889 is an example of a devastating flash flood.
www.encyclopedia-online.info /Flash_flood   (327 words)

  
 Flash Flood Encyclopedia Article @ HillCountryArtists.com (Hill Country Artists)   (Site not responding. Last check: )
A flash flood 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 becomes saturated with water that fell so quickly that it could not be absorbed.
Flash floods most often occur in normally dry areas that have recently received precipitation, but may also be seen anywhere downstream from the source of the precipitation (even dozens of miles from the source).
www.hillcountryartists.com /encyclopedia/Flash_flood   (605 words)

  
 Flash Flood Forecasting
Flash floods are defined to be flood events where the rising water occurs during or a matter of a few hours after the associated rainfall.
Supercell-associated flash floods are especially dangerous, as the severe weather produced by such storms can divert attention from their flash flood potential.
The key to good flash flood warnings (associated with detecting the event as soons as possible after it begins) is having recognized that a flash flood event was possible (i.e., an enhanced probability over climatology) before the rainfall ever began.
www.cimms.ou.edu /~doswell/barcelona/flashf.html   (3359 words)

  
 Flood and Flash Flood Preparedness
Floods are among the most frequent and costly natural disasters in terms of human hardship and economic loss.
Flooding occurs in known floodplains when prolonged rainfall over several days, intense rainfall over a short period of time, or an ice or debris jam causes a river or stream to overflow and flood the surrounding area.
Flood dangers do not end when the water begins to recede; there may be flood-related hazards within your community, which you could hear about from local broadcasts.
www.disastercenter.com /guide/flood.html   (3355 words)

  
 Flash Flood Paper
A given rainfall event's chances to produce a flash flood are dramatically affected by such factors as antecedent precipitation, the size of the drainage basin, the topography of the basin, the amount of urban use within the basin, and so on.
Flash flood events arise from high to extremely high rainfall rates, whereas river flood events are associated with rainfall events over days and perhaps months.
Flash floods caused many of the deaths during the summer of 1993; flash floods, of course, are the main concern within this paper.
www.cimms.ou.edu /~doswell/Methodology/Flash_Floods.html   (11738 words)

  
 NOAA Home Page - NOAA Floods Portal
Very heavy rain in a short period of time can lead to flash flooding, depending on local terrain, ground cover, degree of urbanization, amount of man-made changes to the natural river banks, and initial ground or river conditions.
The Black Hills are especially vulnerable to flash floods, where steep terrain and narrow canyons can funnel heavy rain into small creeks and dry ravines, turning them into raging walls of water.
The video points out the possibility of highway conditions occuring as a result of flooding or flash flooding that are often the cause of motorist fatalities and provides rules for safe operation of vehicles under these conditions.
www.noaa.gov /floods.html   (745 words)

  
 NWS Flood Safety Home Page
Flooding is a coast to coast threat to the United States and its territories in all months of the year.
National Flood Safety Awareness Week is intended to highlight some of the many ways floods can occur, the hazards associated with floods, and what you can do to save life and property.
Brochure: Tropical Cyclone and Inland Flooding (Eastern Region)
www.floodsafety.noaa.gov   (185 words)

  
 Infocus -- The Science of Floods
For example, during the spring of 1997, the heavy flooding of cities along the Red River in North Dakota and Minnesota was predicted two months in advance.
The '97 floods in the Upper Plains states were caused by heavy rainfall during the fall.
An urban area can be flooded by an amount of rainfall that would have had no impact in a rural area.
www.pbs.org /newshour/infocus/floods/science.html   (1037 words)

  
 Flash Flood Safety   (Site not responding. Last check: )
Flash flooding is the 2nd greatest weather-related killer in Utah.
A flash flood watch means that conditions are favorable for flash flooding.
A flash flood warning means that flash flooding is occurring or is imminent.
www.wrh.noaa.gov /slc/projects/disasters/flood_stats/flood_safety.html   (242 words)

  
 weather.com - Fire
During recent years, floods and flash floods have caused billions of dollars in damage each year.
(commonly called River Flood) is a high flow or overflow of water from a river or similar body of water, occurring over a period of time too long to be considered a flash flood.
The Mississippi River Flood of 1993 was caused by repeated heavy rain from thunderstorms over a period of weeks.
www.weather.com /safeside/flood   (290 words)

  
 Flash Floods and Floods   (Site not responding. Last check: )
Flash floods are extremely dangerous, largely because they catch people unaware.
Flash floods occur within a few minutes or hours of excessive rainfall, a dam or levee failure, or a sudden release of water held by an ice jam.
Flash flood or flood warning: Flash flooding or flooding has been reported or is imminent.
www.baltimorecountymd.gov /News/emergency_prep/floods.html   (840 words)

  
 Flash Flood Safety Information
Flooding is the most common cause of weather-related deaths in Texas.
Most flash flood deaths occur when people drive their vehicles into flood waters.
Flood water may rise very quickly and could cover the vehicle or sweep it away.
www.ci.longview.tx.us /services/flash_flood_safety_information.html   (166 words)

  
 Untitled Document
On the average, each year over 300,000 Americans are driven from their homes by floods and flash floods; 135 people are killed; and around $2 billion worth of property is damaged or destroyed.
To protect yourself from flash floods, know when they may occur, what the warning signs are and what to do if you are caught in a flash flood.
Many flash flood deaths in Utah are due to people camping in these areas when a flash flood occurs.
www.utahweather.org /UWC/lightning_precipitation/floods_flashfloods.html   (1298 words)

  
 FloodSmart.gov: Risk Scenarios   (Site not responding. Last check: )
Flash floods are the #1 weather-related killer in the U.S. They can roll boulders, tear out trees and destroy buildings and bridges.
Inland flooding from tropical storms can be a major threat to communities hundreds of miles from the coast.
With flood insurance protection, you will be reimbursed for covered costs if you experience a flood.
www.floodsmart.gov /floodsmart/static/riskscenario/riskscenario.jsp   (627 words)

  
 American Red Cross
A flash flood WATCH means flash flooding is possible in your area.
Be alert to signs of flash flooding and be ready to evacuate on a moment's notice.
And remember...when a flood, earthquake, tornado, fire, or other emergency happens in your community, you can count on your local American Red Cross chapter to be there to help you and your family.
www.redcross.org /services/prepare/0,1082,0_240_,00.html   (689 words)

  
 Epic Disasters - The Worst US Floods
The Johnstown Flood also became a social cause celebre, because the dam that collapsed had been built to create a lake for vacationing millionaires, such as Andrew Carnegie and Andrew Mellon, while the inhabitants of the town were Welsh and German immigrants.
Heavy rains brought flooding that raised the level of the Missouri River 35 feet.
Flash flood sweeps away a third of the town.
www.epicdisasters.com /worstusfloods.php   (188 words)

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