Weather Alert in Utah
Winter Storm Warning issued February 18 at 2:58AM MST until February 19 at 5:00AM MST by NWS Salt Lake City UT
AREAS AFFECTED: Wasatch Back
DESCRIPTION: * WHAT...Heavy snow. Total snow accumulations between 6 and 14 inches with locally higher amounts up to 18 inches near Park City. * WHERE...Wasatch Back. * WHEN...Until 5 AM MST Thursday. * IMPACTS...Winter driving conditions are expected. Traction restrictions are likely. Snow likely to impact the Wednesday morning commute, especially through Parleys Canyon. * ADDITIONAL DETAILS...A period of heavy snow is expected between roughly 12 PM to 5 PM, with snowfall rates exceeding 1 inch per hour. 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 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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