Weather Alert in Colorado
Avalanche Advisory issued February 27 at 5:49PM MST by NWS Denver CO
AREAS AFFECTED: Gore and Elk Mountains/Central Mountain Valleys; South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet; South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet; Western Mosquito Range/East Lake County Above 11000 Ft; Eastern Sawatch Mountains above 11000 Ft; Western Chaffee County Between 9000 and 11000 Ft
DESCRIPTION: SABCO THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE COLORADO AVALANCHE INFORMATION CENTER. ...A SPECIAL AVALANCHE ADVISORY IN EFFECT FROM FRIDAY EVENING THROUGH SUNDAY... *WHAT...It is very easy for people to trigger large and deadly avalanches through the weekend. *WHERE...The Never Summer Mountains south over Berthoud Pass and Loveland Pass into Summit County, the Gore Range, and the northern Sawatch. *WHEN...Dangerous avalanche conditions exist through Sunday. *IMPACTS...Very large and dangerous avalanches will be easy to trigger. *PRECAUTION/PREPAREDNESS ACTIONS...These are the most dangerous conditions we have experienced all season. You can trigger a very large avalanche from a distance or from below. You may get no warning signs before you trigger a deadly avalanche. Careful planning and conservative terrain selection are essential for safe travel in backcountry avalanche terrain. Avoid travel on or under slopes steeper than 30 degrees. You can find more detailed information at colorado.gov/avalanche Pritchett
INSTRUCTION: N/A
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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.
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Weather Topic: What is Precipitation?
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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.
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