Weather Alert in Louisiana
Flood Watch issued July 16 at 10:38PM CDT until July 19 at 7:00PM CDT by NWS Lake Charles LA
AREAS AFFECTED: Evangeline; St. Landry; Lafayette; Upper St. Martin; Lower St. Martin; Northern Acadia; Upper Vermilion; Upper Iberia; Upper St. Mary; Southern Acadia; Lower Vermilion; Lower Iberia; Lower St. Mary
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central, south central, and southwest Louisiana, including the following parishes, in central Louisiana, Evangeline and St. Landry. In south central Louisiana, Lafayette, Lower Iberia, Lower St. Martin, Lower St. Mary, Upper Iberia, Upper St. Martin and Upper St. Mary. In southwest Louisiana, Lower Vermilion, Northern Acadia, Southern Acadia and Upper Vermilion. * WHEN...From 7 AM CDT Thursday through Saturday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - A tropical disturbance moving slowly across the northern gulf will produce long duration periods of potentially heavy and training rainfall Thursday through Saturday. Rainfall totals of up to 15 inches will be possible in some spots within the watch area. - 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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