Weather Alert in Pennsylvania
Winter Weather Advisory issued February 24 at 1:44PM EST until February 25 at 1:00PM EST by NWS Cleveland OH
AREAS AFFECTED: Southern Erie; Crawford
DESCRIPTION: * WHAT...Snow and patchy blowing snow expected. Total snow accumulations of 2 to 5 inches. Winds gusting as high as 35 mph. * WHERE...Crawford and southern Erie Counties. Greatest snow accumulations expected south of I-90 and east of I-79. * WHEN...From 7 PM this evening to 1 PM EST Wednesday. * IMPACTS...Plan on slippery road conditions and periodic poor visibility. The hazardous conditions could impact the Wednesday morning commute. * ADDITIONAL DETAILS...The heaviest snow is expected late this evening into the first few predawn hours of Wednesday morning.
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 is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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