Weather Alert in Arkansas
Flash Flood Warning issued July 18 at 2:23AM CDT until July 18 at 5:00AM CDT by NWS Tulsa OK
AREAS AFFECTED: Benton, AR; Washington, AR; Adair, OK; Delaware, OK
DESCRIPTION: FFWTSA The National Weather Service in Tulsa has extended the * Flash Flood Warning for... Southwestern Benton County in northwestern Arkansas... Northwestern Washington County in northwestern Arkansas... Northwestern Adair County in northeastern Oklahoma... Southeastern Delaware County in northeastern Oklahoma... * Until 500 AM CDT. * At 223 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Estimates between 2 and 5 inches and locally higher of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Fayetteville... Springdale... Rogers... Bentonville... Siloam Springs... Gentry... Tontitown... Cave Springs... West Siloam Springs... Colcord... Kansas... Highfill... Watts... Oaks... Springtown... Northwest Arkansas Regional Airport... Twin Oaks... Johnson... Elm Springs... Lake Francis...
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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