Weather Alert in Utah
Avalanche Warning issued February 18 at 5:23AM 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: AVWSLC * WHAT...The avalanche danger for the warning area is rising to HIGH today. * WHERE...The mountains of Northern, Central, and Southwestern Utah, as well as Southeastern Idaho. * WHEN...The Warning will be effect from 6 AM Wednesday to 6 AM Thursday. * IMPACTS...Recent heavy snow combined with strong wind is creating widespread areas of unstable snow. Both human-triggered and natural avalanches are likely. Avalanches will increase in size and likelihood throughout the day. * ADDITIONAL DETAILS...What to do...Avoid all avalanche terrain. Stay off of and out from under slopes steeper than 30 degrees. Carry and know how to use avalanche rescue equipment. Find safer riding conditions on slopes less than 30 degrees with no overhead hazard.
INSTRUCTION: Stay off of and out from under slopes steeper than 30 degrees. Backcountry travelers should consult www.utahavalanchecenter.org or call 1-888-999-4019 for more detailed information. This Warning does not apply to ski areas where avalanche hazard reduction measures are performed.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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
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