Weather Alert in Utah
Winter Weather Advisory issued February 17 at 2:29PM MST until February 18 at 5:00PM MST by NWS Salt Lake City UT
AREAS AFFECTED: Zion National Park; Upper Sevier River Valleys; South Central Utah
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 1 to 4 inches with higher totals up to 10 inches above 7000 feet. * WHERE...South Central Utah, Upper Sevier River Valleys, and Zion National Park. * WHEN...From 8 PM this evening to 5 PM MST Wednesday. * IMPACTS...Winter driving conditions are likely. * ADDITIONAL DETAILS...Heaviest snowfall is expected between 6 AM to 11 AM, with more showery conditions continuing through the remainder of the afternoon.
INSTRUCTION: Slow down and use caution while traveling. 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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North America Water Vapor (Moisture)
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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
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