Flash Floods and Hail property and personal devastation
Cases involving either slow-moving thunderstorms or a series of storms which move repeatedly across the same area (sometimes called train-echo storms) frequently result in flash flooding.
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Flash floods
Mid-February 1972 in Victoria featured a spell of tropic-like heat, humidity and intense thunderstorms: on both the 15th and 16th storms dropped over 35mm of rain on Melbourne.
Flash Flood - a local flood of great volume and short duration generally resulting from heavy rainfall in the immediate vicinity
Flash Flood Guidance - forecast guidance specific to flash flooding ...
Flash Flood Watch- A Flash Flood Watch will be issued for potential rapid flooding from either torrential downpours, dam breaks, or ice jam breaks. They are usually issued up to 12 hours prior to a possible flash flood event.
Flash Flood: A flood caused by heavy or excessive rainfall in a short period of time, generally less than 6 hours. A flash flood rises rapidly, often with little or no warning.
Flash Flooding - Rapidly-developing flooding of tributaries, usually as a result of thunderstorms.
Flash Flood Statement (FFS) This product is issued after either a Flash Flood Watch or a Flash Flood Warning has been issued by a local National Weather Service Forecast Office.
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. Some possible causes are ice jams, dam failure, and topography.
Flash flood
Heavy rainfall and localised flooding of short duration with a relatively high peak discharge. Often caused by severe thunderstorms or intense rainfall events such as an East Coast Low.
Flash Flood Guidance
(FFG) In hydrologic terms, an internal product produced by the RFC's containing rainfall threshold values which must be exceeded in order to produce a flash flood.
Flash Flood Statement ...
FLASH FLOOD: A flood that occurs within a few hours (usually less than six) of heavy or excessive rainfall, dam or levee failure.
FLOOD: High flow, overflow or inundation of a normally dry area which causes or threatens damage.
flash flood: a flood that rises and falls rapidly with little or no advance warning, usually due to intense rainfall over a small area.
flood: when water overflows the confines of a body of water and gathers over low-lying areas.
Flash Flood
A flood that rises quite rapidly with little or no advance warning, usually as a result of intense rainfall over a small area, or possibly, an ice jam, a dam failure, etc.
Flash flood A sudden rise in river or stream levels causing flooding.
Forced convection Convection aided by topographic uplift or converging surface winds.
Free convection Convection triggered by intense solar heating of Earth's surface.
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.
FFA- Flash flood advisory
FILLING- The weakening of a low pressure system (in particular the increase of central surface pressure)
FIRE UP- A favorite phrase of forecasters. It means storms are developing or will develop.
Urban Flash Flood Guidance A specific type of flash flood guidance which estimates the average amount of rain needed over an urban area during a specified period of time to initiate flooding on small, ungaged streams in the urban area.
Flash flood- A sudden, violent flood that occurs within a few hours, or even minutes, of a heavy rainstorm.
Front- The area where air masses meet and do not mix.
Global warming- A gradual increase in the temperature of Earth's atmosphere.
Flash Flood- Flooding caused by a rapid rise in the water level of rivers, streams, or lakes, usually as a result of heavy rains.
Fog- A cloud of water droplets suspended in the air that touches the ground.
Flash flood: a sudden and destructive rush of water down a narrow gully or over a sloping surface, caused by heavy rainfall.
Flow: 1. wind; 2. volume of air carried by wind.
Flash Flood - Sudden flooding that occurs when floodwaters rise swiftly with no warning within several hours of an intense rain. They often occur after intense rainfall from slow moving thunderstorms.
FLASH FLOOD - A sudden flood of water caused by heavy rainfall in a short period of time or sudden snowmelt. Flash floods could occur as ponding of water in low areas or a destructive wall of water.
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.
Train(ing) echoes can frequently be a source of flash flooding.TransmitterThe radar equipment used for generating and amplifying a radio frequency (RF) carrier signal, modulating the carrier signal with intelligence, ...
FFGFlash Flood GuidanceFG(Also abbrev. F) - Fog - water droplets suspended in the air at the Earth's surface. Fog is often hazardous when the visibility is reduced to ¼ mile or less.
HP storms often produce extreme and prolonged downburst events, serious flash flooding, and very large damaging hail events.hPaHectopascal- A unit of pressure equal to a millibar (1 hPa = 1 mb).
A severe thunderstorm can cause flash flooding and wind and hail damage and may spawn tornadoes.shortwave irradianceThe rate at which radiant energy, at wavelengths between 0.
NATIONAL SEVERE STORMS LABORATORY (NSSL) A branch of the National Oceanic and Atmospheric Administration, it provides accurate and timely forecasts and warnings of hazardous weather events, especially flash floods, hail, lightning, tornadoes, ...
This statement will take the place of Special (SPS) and Severe (SVS) Statements, Flash Flood/Flood (FFS) Statements, Coastal Flood Statements, and Marine Weather (MWS) Statements.
These advisories will be terminated when the threat of flash flooding has ended or when the remnants of these storms can no longer be distinguished from other synoptic features capable of producing flash floods.
monitor severe weather events such as hurricanes, thunderstorms, and flash floods;
relay environmental data from surface collection platforms to a processing center; ...
These systems may last for hours and produce flash flooding or weak tornadoes. The third type is the squall line composed of a line of convective clouds which share a common gust front along the leading edge (sometimes seen as a wall cloud).
Browse Related Terms: Coastal/Lakeshore Flood Watch, Flash Flood Statement, Flash flood warning, Flash flood watch, Flood Statement (FLS), Flood Watch, Severe Thunderstorm Warning, Storm Data, Storm Tide, Tornado Warning, Tropical Storm Summary ...
Short-fuse warnings include tornado warnings, severe thunderstorm warnings, and flash flood warnings.
A branch of the National Oceanic and Atmospheric Administration, it provides accurate and timely forecasts and warnings of hazardous weather events, especially flash floods, hail, lightning, tornadoes, and other severe wind storms.
Severe thunderstorms Intense thunderstorms capable of producing heavy showers, flash floods, hail, strong and gusty surface winds, and tornadoes.
GULLY WASHER A heavy rain shower that occurs suddenly, possibly creating a flash flood.
SPC (Storm Prediction Center) - a national forecast center in Norman, Oklahoma, which is part of NCEP; responsible for providing short-term forecast guidance for severe convection, excessive rainfall (flash flooding), ...
 See also: Flood, Storm, Thunderstorm, Thunder, Weather
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