Weather Alert in Montana
Winter Weather Advisory issued March 12 at 12:46AM MDT until March 12 at 3:00PM MDT by NWS Great Falls MT
AREAS AFFECTED: Northern High Plains; Southern High Plains
DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to two inches. Winds gusting as high as 95 mph. For the Winter Storm Warning, heavy snow expected. Total snow accumulations between 6 and 15 inches. * WHERE...The foothills and plains adjacent to the Rocky Mountain Front. * WHEN...For the Winter Weather Advisory, until 3 PM MDT this afternoon. For the Winter Storm Warning, from 6 PM this evening to 6 PM MDT Saturday. * IMPACTS...Travel could be very difficult. Widespread blowing snow could significantly reduce visibility. * ADDITIONAL DETAILS...This will be a mult-day snowfall, with lulls in the snow at times.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. Monitor the latest forecasts for updates on this situation.
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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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