Weather Alert in Montana
Winter Weather Advisory issued February 18 at 4:44PM MST until February 19 at 8:00AM MST by NWS Missoula MT
AREAS AFFECTED: West Glacier Region
DESCRIPTION: * WHAT...Snow and cold temperatures expected. Additional snow accumulations up to one inch, along with gusty northeast winds of 30 to 35 mph. * WHERE...Polebridge, Glacier National Park, Highway 83 Bigfork to Swan Lake, Essex, Marias Pass, and Bad Rock Canyon. * WHEN...Until 8 AM MST Thursday. * IMPACTS...Winter traveling conditions. Use caution while driving. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes, especially over higher passes. * ADDITIONAL DETAILS...Northeast winds between 15 and 25 mph with gusts to 35 mph have been generating bitterly cold wind chill temperatures as cold as 30 below zero. Any exposed skin could become frostbitten within 30 minutes in these conditions. Newborn livestock may be stressed. While northeast winds will lessen somewhat tonight, wind chill temperatures near 20 below zero are possible.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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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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