Weather Alert in Montana
Winter Storm Warning issued March 11 at 9:21AM MDT until March 14 at 12:00PM MDT by NWS Missoula MT
AREAS AFFECTED: West Glacier Region
DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to 4 inches. For the first Winter Storm Warning, heavy snow expected. Total snow accumulations up to 6 inches. For the Blizzard Warning, blizzard conditions expected. There is a high likelihood of extreme impacts from strong winds and falling and/or blowing snow on US Highway 2 east of West Glacier to Marias Pass and in backcountry and mountain areas. Wind gusts up to 80 mph. For the second Winter Storm Warning, heavy snow expected. There is a likelihood of major winter weather impacts winter storm impacts. Total snow accumulations between 5 and 20 inches. Winds gusting as high as 40 mph. * WHERE...Polebridge, Marias Pass, Bad Rock Canyon, Highway 83 Bigfork to Swan Lake, Glacier National Park, and Essex. * WHEN...For the Winter Weather Advisory, until 6 PM MDT this evening. For the first Winter Storm Warning, from 6 PM this evening to midnight MDT tonight. For the Blizzard Warning, from midnight tonight to 9 AM MDT Thursday. For the second Winter Storm Warning, from 9 AM Thursday to noon MDT Saturday. * IMPACTS...Whiteout conditions are expected and will make travel treacherous and potentially life-threatening late Wednesday night through Thursday morning. For EXTREME winter storm impacts, expect substantial disruptions to normal activities. Extremely dangerous or impossible traveling conditions. Travel in the impacted areas is not advised. Extensive and widespread closures and disruptions to infrastructure may occur. Life saving actions may be needed. Very strong winds could cause extensive tree damage. Visibilities may drop below 1/4 mile due to falling and blowing snow. * ADDITIONAL DETAILS...High winds will impact all elevations late tonight through Thursday morning with wind gusts of 60 to 80 mph.
INSTRUCTION: Persons should consider delaying all travel. If travel is absolutely necessary, drive with extreme caution. Consider taking a winter storm kit along with you, including such items as tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded. A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds are likely. This will lead to whiteout conditions, making travel extremely dangerous. Do not travel. If you must travel, have a winter survival kit with you. If you get stranded, stay in your vehicle.
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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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