Weather Alert in Alabama
Flood Warning issued May 11 at 9:08PM CDT by NWS Mobile AL
AREAS AFFECTED: Clarke, AL; Washington, AL
DESCRIPTION: ...The Flood Warning is extended for the following river in Alabama... Tombigbee River Near Leroy affecting Washington and Clarke Counties. For the Tombigbee River...including Coffeeville Dam - upstream, Coffeeville Dam, Leroy...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Tombigbee River near Leroy. * WHEN...From Tuesday morning until further notice. * IMPACTS...At 24 feet, flooding of low lying farm and pasturelands begins. Cattle in low lying areas should be moved to higher ground. Water approaches low lying roads on west side of river. * ADDITIONAL DETAILS... - At 8:00 PM CDT Sunday the stage was 20.0 feet. - Forecast...The river is expected to rise above flood stage Tuesday morning and continue rising to 25.7 feet Thursday evening. Additional rises are possible thereafter. - Flood stage is 24 feet.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/mob. Click on the Rivers and Lakes menu for forecasts and observations.
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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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