Weather Alert in Pennsylvania
Flood Warning issued July 1 at 10:23PM EDT until July 2 at 8:45PM EDT by NWS State College PA
AREAS AFFECTED: Lancaster, PA
DESCRIPTION: ...The Flood Warning continues for the following rivers in Pennsylvania... Swatara Creek at Harper Tavern affecting Lebanon and Schuylkill Counties. Conestoga River at Lancaster affecting Lancaster County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Conestoga River at Lancaster. * WHEN...Until tomorrow evening. * IMPACTS...At 11.0 feet, Grofftown Road will flood. At 13.0 feet, several homes are affected by high water. At 14.0 feet, the footbridge near the confluence of Stauffer Run begins to flood. * ADDITIONAL DETAILS... - At 9:15 PM EDT Tuesday the stage was 11.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:15 PM EDT Tuesday was 12.4 feet. - Forecast...The river is expected to rise to a crest of 12.2 feet tomorrow morning. It will then fall below flood stage early tomorrow afternoon. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 11.7 feet on 06/21/2003. - http://www.weather.gov/safety/flood
INSTRUCTION: Be especially cautious at night when it is harder to recognize the dangers of flooding. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. Most flood related deaths occur in automobiles. Do not attempt to cross water covered bridges, dips, or low water crossings. Never try to cross a flowing stream, even a small one, on foot. To escape rising water find another route over higher ground. Additional information is available at www.weather.gov. The next statement will be issued Wednesday morning.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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
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