Weather Alert in Virginia
Flood Warning issued August 21 at 10:47PM EDT until August 22 at 8:45AM EDT by NWS Blacksburg VA
AREAS AFFECTED: Botetourt, VA; Franklin, VA; Roanoke, VA; City of Roanoke, VA; City of Salem, VA
DESCRIPTION: * WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of west central Virginia, including the following counties and independent cities, Botetourt, City of Roanoke, City of Salem, Franklin and Roanoke. * WHEN...Until 845 AM EDT Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is occurring. Numerous roads remain closed due to flooding. Expect many areas of slow moving or standing water. Local media have reported water rescues earlier this evening. * ADDITIONAL DETAILS... - At 1046 PM EDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Flooding is already occurring in the warned area. Between 3 and 5 inches of rain have fallen. - This includes the following streams and drainages... Big Bear Rock Branch, Back Creek, Carvin Creek and Buffalo Creek. Flooding impacts will continue, but no additional rainfall is expected. - Some locations that will experience flooding include... Roanoke, Salem, Vinton, Boones Mill, Catawba, Cave Spring and Hollins. - http://www.weather.gov/safety/flood
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. When it is safe to do so, please send your reports of flooding, including mudslides or flooded roads, to the National Weather Service by calling toll free at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be shared on the National Weather Service Blacksburg Facebook page and on X.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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