Weather Alert in Alabama
Flood Watch issued August 2 at 11:47PM CDT until August 4 at 12:00AM CDT by NWS Birmingham AL
AREAS AFFECTED: Blount; Etowah; Calhoun; Cherokee; Cleburne; Jefferson; Shelby; St. Clair; Talladega; Clay; Randolph; Bibb; Chilton; Coosa; Tallapoosa; Chambers; Autauga; Elmore
DESCRIPTION: Periods of scattered to numerous showers and thunderstorms producing heavy rainfall are expected through Sunday. Due to the combination of slow movement and high rainfall rates, this activity will pose a threat of flash flooding. Additional rounds of showers and thunderstorms are likely on Monday. Depending on the forecast evolution of this activity, the Flood Watch may need to be extended into Monday for some counties in east Alabama. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central Alabama, including the following counties, Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton, Clay, Cleburne, Coosa, Elmore, Etowah, Jefferson, Randolph, Shelby, St. Clair, Talladega and Tallapoosa. * WHEN...Through Sunday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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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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