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 Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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