Weather Alert in Texas
Flood Warning issued July 16 at 7:26PM CDT until July 18 at 10:00AM CDT by NWS Austin/San Antonio TX
AREAS AFFECTED: Frio, TX
DESCRIPTION: ...The National Weather Service in Austin/San Antonio TX has issued a Flood Warning for the following rivers in Texas... Frio River Near Derby affecting Frio County. * WHAT...Minor flooding is forecast. * WHERE...Frio River near Derby. * WHEN...From late tonight to late Friday morning. * IMPACTS...At 6.0 feet, Minor lowland flooding reaches the Farm to Market 1581 bridge floor. * ADDITIONAL DETAILS... - At 6:30 PM CDT Wednesday the stage was 5.0 feet. - Bankfull stage is 6.0 feet. - Forecast...The river is expected to rise above flood stage late tonight to a crest of 6.2 feet tomorrow morning. It will then fall below flood stage late tomorrow evening. - Flood stage is 6.0 feet. - Flood History...No available flood history. - http://www.weather.gov/safety/flood
INSTRUCTION: Caution is urged when walking near riverbanks. Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Additional information is available at www.weather.gov. The next statement will be issued Thursday afternoon by 130 PM CDT.
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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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