Weather Alert in Utah
Avalanche Advisory issued February 20 at 5:52AM MST by NWS Salt Lake City UT
AREAS AFFECTED: Wasatch Mountains I-80 North; Wasatch Mountains South of I-80; Western Uinta Mountains; Wasatch Plateau/Book Cliffs; Central Mountains; Southern Mountains
DESCRIPTION: SABSLC * WHAT...The Utah Avalanche Center is warning of dangerous avalanche conditions across all Utah mountains this weekend. This week's heavy snowfall and strong winds overloaded preexisting weak layers, creating a HIGH avalanche danger across the entire state. With improving weather moving in for the weekend, avalanche accidents are likely in the backcountry. There have already been two tragic avalanche fatalities this week, as well as several close calls and numerous backcountry avalanches reported. * WHERE...The mountains of Utah and southeast Idaho. * WHEN...6 AM MST Friday, February 20th 2006 until Monday, February 23rd 2006 at 6 AM MST. * IMPACTS...Dangerous avalanche conditions exist in the backcountry and will persist through the weekend. Natural avalanches are possible, and people are likely to trigger avalanches on slopes steeper than 30 degrees. Dangerous and deadly avalanches can be triggered remotely (from a distance or from below). People leaving ski area boundaries are entering the backcountry where the same dangerous avalanche conditions exist.
INSTRUCTION: Backcountry travelers should consult www.utahavalanchecenter.org or call 1-888-999-4019 for more detailed information. This Bulletin does not apply to ski areas or highways where avalanche hazard reduction measures are performed.
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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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