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 is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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