Weather Alert in Pennsylvania
Flood Advisory issued February 21 at 6:55AM EST until February 22 at 7:00AM EST by NWS Pittsburgh PA
AREAS AFFECTED: Allegheny, PA
DESCRIPTION: ...The Flood Advisory continues for the following rivers in Pennsylvania... Ohio River At Pittsburgh affecting Allegheny County. .Rain and snow melt will continue to result in elevated levels of the Ohio River at Pittsburgh through early Sunday. * WHAT...Flooding caused by rain and snowmelt continues. * WHERE...Ohio River at Pittsburgh. * WHEN...Until Sunday morning. * IMPACTS...At 18.0 feet, Water begins to flow onto the Monongahela Parking Wharf. At 19.0 feet, Water begins to flow onto the North Shore Riverwalk between the stadiums. At 19.5 feet, The Monongahela Parking Wharf is completely flooded. * ADDITIONAL DETAILS... - At 6:45 AM EST Saturday the stage was 18.9 feet. - Bankfull stage is 18.0 feet. - Forecast...The river is expected to rise again to a crest of 18.9 feet this afternoon, before beginning to fall tonight. - Action stage is 18.0 feet. - Flood stage is 22.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Caution is urged when walking near riverbanks. Additional information is available at weather.gov/pbz. The next statement will be issued this evening at 700 PM EST.
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Weather Topic: What are Altocumulus Clouds?
Home - Education - Cloud Types - Altocumulus Clouds
Next Topic: Altostratus Clouds
Similar to cirrocumulus clouds, altocumulus clouds are
characterized by cloud patches. They are distinguished by larger cloudlets
than cirrocumulus clouds but are still smaller than stratocumulus clouds.
Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km)
and may resemble, at times, the shape of a flying saucer.
These uncommon formations, called altocumulus lenticularis, are created by uplift
in the atmosphere and are most often seen in close proximity to mountains.
Next Topic: Altostratus Clouds
Weather Topic: What are Cirrocumulus Clouds?
Home - Education - Cloud Types - Cirrocumulus Clouds
Next Topic: Cirrostratus Clouds
Cirrocumulus clouds form at high altitudes (usually around 5 km)
and have distinguishing characteristics displayed in a fine layer of
small cloud patches. These small cloud patches are sometimes referred to as
"cloudlets" in relation to the whole cloud formation.
Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the
water droplets in the cloud freeze into ice crystals and the cloud becomes a
cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud
formations generally pass rapidly.
Next Topic: Cirrostratus Clouds
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