Weather Alert in Pennsylvania
Winter Weather Advisory issued February 22 at 2:04AM EST until February 24 at 7:00AM EST by NWS Cleveland OH
AREAS AFFECTED: Crawford
DESCRIPTION: * WHAT...Lake effect snow expected. Total snow accumulations between 2 and 5 inches. * WHERE...Crawford County. * WHEN...From 10 PM this evening to 7 AM EST Tuesday. * IMPACTS...Plan on slippery road conditions with slower travel likely. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...Widespread light snow is expected today, although impacts will be minimal. Lake enhanced snow will develop this evening with periods of moderate to heavy snowfall possible late tonight and Monday.
INSTRUCTION: Slow down and use caution while traveling. The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway, and traffic conditions.
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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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