Weather Alert in Utah
Winter Storm Warning issued February 17 at 2:29PM MST until February 18 at 5:00PM MST by NWS Salt Lake City UT
AREAS AFFECTED: Southwest Utah; Bryce Canyon Country
DESCRIPTION: * WHAT...Heavy snow expected. Total snow accumulations between 2 and 6 inches below 7000 feet, except 6 to 14 inches above 7000 feet. Winds gusting as high as 55 mph. * WHERE...Bryce Canyon Country and Southwest Utah. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Winter driving conditions are likely. Traction laws may be enacted. * ADDITIONAL DETAILS...A period of heavy snow is expected between roughly 10 PM to 8 AM, with snowfall rates 1 to 2 inches per hour possible at times. Showery conditions will persist through the remainder of the day.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For winter road conditions from the Utah Department of Transportation, visit http://www.udottraffic.utah.gov. For graphical depictions of the snowfall forecast, including Official NWS Forecast, High End Amount, and Low End Amount, visit weather.gov/slc/winter.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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