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 is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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