Weather Alert in Colorado
Dense Fog Advisory issued August 25 at 9:36AM MDT until August 25 at 12:00PM MDT by NWS Goodland KS
AREAS AFFECTED: Yuma County; Kit Carson County; Cheyenne County; Cheyenne; Rawlins; Sherman; Thomas; Wallace; Logan; Greeley; Wichita; Dundy
DESCRIPTION: * WHAT...Visibility at or below one quarter mile in dense fog. * WHERE...Portions of eastern Colorado, northwest Kansas and southwest Nebraska. * WHEN...Until noon MDT /1 PM CDT/ today. * IMPACTS...Hazardous driving conditions. * ADDITIONAL DETAILS...This includes portions of the Interstate 70 corridor in eastern Colorado and northwest Kansas. As of 930 am MDT, observation sites reporting dense fog included Yuma, Wray, Colby and Oakley. Gradual improvement is expected late this morning and early this afternoon.
INSTRUCTION: If driving, slow down, use low beam headlights and leave plenty of following distance.
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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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