Weather Alert in Colorado
Avalanche Watch issued February 16 at 5:16PM MST by NWS Denver CO
AREAS AFFECTED: Grand and Battlement Mesas; Gore and Elk Mountains/Central Mountain Valleys; Flat Tops
DESCRIPTION: AVABOU THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE COLORADO AVALANCHE INFORMATION CENTER. AVALANCHE WATCH IN EFFECT FROM 9 AM WEDNESDAY TO 5 PM FRIDAY *WHAT Heavy snow and strong winds will result in HIGH (4 of 5) avalanche danger *WHERE The San Juan Mountains and the Park Range *WHEN Expect very dangerous avalanche conditions to begin Wednesday and last through Friday *IMPACTS Large and dangerous avalanches will be easy to trigger. Large avalanches will run naturally. *PRECAUTION/PREPAREDNESS ACTIONS Travel in backcountry avalanche terrain is not recommended from Wednesday through Friday. Avoid travel on and under slopes with a slope angle steeper than about 30 degrees. You can find more detailed information at colorado.gov/avalanche
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.
Next Topic: Nimbostratus Clouds
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
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