Weather Alert in Pennsylvania
Winter Weather Advisory issued February 5 at 9:57PM EST until February 7 at 1:00AM EST by NWS Cleveland OH
AREAS AFFECTED: Southern Erie
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 3 and 5 inches. Winds gusting as high as 40 mph may will produce patchy to areas of blowing snow Friday evening. * WHERE...Southern Erie County. * WHEN...From 7 AM Friday to 1 AM EST Saturday. * IMPACTS...Plan on slippery conditions with with slower travel likely The hazardous conditions could impact the Friday morning and evening commutes. Blowing snow may reduce visibility less than a mile at times. * ADDITIONAL DETAILS...A broken line of snow squalls or heavier burst of snow may develop along an Arctic front as it pushes through the area Friday evening.
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 Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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
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