Weather Alert in Alaska
Special Weather Statement issued August 25 at 5:41PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Bristol Bay Borough (Naknek and King Salmon); Lake Iliamna / Nila Vena / Nanvarpak
DESCRIPTION: Strong southeasterly winds up to 45 mph have resulted in the resuspension of ash from the 1912 Katmai-Novarupta eruption across central Lake and Peninsula Borough and could work into eastern Bristol Bay Borough. Communities in central Lake and Peninsula Borough, including Igiugig, may observe reduced visibility as a result of the ash. Resuspended ash may work into eastern Bristol Bay Borough, and the communities of King Salmon and Naknek may see hazy conditions. Those with respiratory ailments in these areas are encouraged to avoid or reduce outdoor activity to avoid inhaling the ash. Rain begins to move into the region Tuesday which should allow ash impacts to cease by Tuesday night.
INSTRUCTION: N/A
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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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