Weather Alert in Ohio
Special Weather Statement issued February 6 at 8:12PM EST by NWS Pittsburgh PA
AREAS AFFECTED: Columbiana; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Armstrong; Indiana; Higher Elevations of Indiana
DESCRIPTION: A arctic cold front will drop across the region during the late evening hours. The front will be accompanied by bands of snow showers, some of which will be moderate to briefly heavy at times. Visibilities of one-half mile or less and wind gusts to 35 MPH are possible in the heavier snow showers. A quick accumulation of one-half to one inch will be possible, especially on untreated surfaces. Snow Squall Warnings may be necessary for the heaviest showers that drop visibility to one- quarter mile or less in heavy, blowing snow. Motorists are urged to use caution while driving this evening. If you encounter heavy snow and very low visibility, slow down and increase the distance between your car and those that surround you. Consider delaying travel until the heavy snow showers have passed.
INSTRUCTION: N/A
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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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