Weather Alert in Alabama
Flood Advisory issued May 11 at 11:10PM CDT until May 12 at 2:15AM CDT by NWS Birmingham AL
AREAS AFFECTED: Bibb, AL; Jefferson, AL; Shelby, AL
DESCRIPTION: * WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of central Alabama, including the following counties, Bibb, Jefferson and Shelby. * WHEN...Until 215 AM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. River or stream flows are elevated. * ADDITIONAL DETAILS... - At 1110 PM CDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. Between 0.5 and 1 inch of rain has fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Birmingham, Hoover, Vestavia Hills, Alabaster, Bessemer, Homewood, Pelham, Mountain Brook, Helena, Hueytown, Gardendale, Irondale, Fairfield, Chelsea, Fultondale, Sumiton, Center Point, Pleasant Grove, Tarrant and Midfield.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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
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