Weather Alert in Alaska
Wind Advisory issued February 18 at 10:57AM AKST until February 20 at 6:00PM AKST by NWS Anchorage AK
AREAS AFFECTED: Southern Kenai Mtns; West Prince William Sound & Whittier
DESCRIPTION: * WHAT...North to west winds 30 to 45 mph with gusts up to 60 mph expected. Wind chill readings dropping to zero to 15 below zero by Friday morning. * WHERE...Seward (and vicinity) and Whittier. * WHEN...From 1 PM Thursday to 6 PM AKST Friday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. The very cold wind chills as low as 15 below zero could result in hypothermia or frostbite if precautions are not taken. * ADDITIONAL DETAILS...Winds will strengthen late tonight through the day Thursday and peak Thursday night through Friday morning. Winds will then very gradually diminish through Saturday. The coldest wind chill temperatures will be Friday morning through Saturday morning.
INSTRUCTION: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
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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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