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 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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