Weather Alert in Idaho
Winter Storm Warning issued March 12 at 5:09AM MDT until March 14 at 12:00PM MDT by NWS Missoula MT
AREAS AFFECTED: Northern Clearwater Mountains
DESCRIPTION: * WHAT...Heavy snow expected. There is a likelihood of extreme winter storm impacts. Total snow accumulations 2 to 8 inches in the lower elevations and 20 to 50 inches in the higher terrain. Winds gusting as high as 50 mph Thursday morning, then up to 35 mph thereafter. * WHERE...Elk River, Highway 11 Pierce to Headquarters, and Pierce. * WHEN...Until 11 AM PDT Saturday. * IMPACTS...For EXTREME winter storm impacts, expect substantial disruptions to normal activities. Extremely dangerous or impossible traveling conditions in the higher terrain and backcountry. Travel in the impacted areas is not advised. Life saving actions may be needed. The hazardous conditions could impact the Thursday morning commutes, especially over higher passes. Gusty winds could bring down tree branches.
INSTRUCTION: Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. Do not touch downed lines and report any power outages to your electric company. Travel is highly discouraged due to slick roadways and the possibility of downed trees and power lines.
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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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