Weather Alert in Wyoming
Winter Weather Advisory issued February 18 at 12:54AM MST until February 19 at 11:00AM MST by NWS Cheyenne WY
AREAS AFFECTED: Converse County Lower Elevations; Niobrara County; North Laramie Range
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 3 and 5 inches in the lower elevations with 4 to 8 inches over the northern Laramie Range. Winds gusting as high as 35 mph with areas of drifting snow. * WHERE...Converse County Lower Elevations, Niobrara County, and North Laramie Range. * WHEN...From 5 PM this afternoon to 11 AM MST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.
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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