Weather Alerts for Alaska
1. Cold Weather Advisory for: North Slopes of the Western Alaska Range
2. Cold Weather Advisory for: Southern Denali Borough; Eastern Alaska Range South of Trims Camp
3. Cold Weather Advisory for: Upper Tanana Valley
4. Extreme Cold Watch for: Southern Kenai Mtns
5. Extreme Cold Watch for: Sutton / Upper Matanuska Valley; Eureka / Tahneta Pass; West Prince William Sound & Whittier; Northern Copper Valley; Western Copper Valley; Central Copper Valley; Ernestine; Northern Susitna Valley; Southern Copper Valley; Tok Cutoff; McCarthy
6. High Wind Warning for: Kodiak Island Northeast
7. High Wind Warning for: Southern Kenai Mtns
8. High Wind Warning for: Thompson Pass
9. Special Weather Statement for: Central Aleutians
10. Wind Advisory for: Valdez
11. Winter Weather Advisory for: Bering Strait Coast
12. Winter Weather Advisory for: Central Copper Valley; Tok Cutoff
13. Winter Weather Advisory for: Glacier Bay; City and Borough of Juneau
14. Winter Weather Advisory for: Kivalina and Red Dog Dock; Baldwin Peninsula
15. Winter Weather Advisory for: Northern Seward Peninsula
16. Winter Weather Advisory for: Petersburg Borough
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Current U.S. National Radar--Current
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North America Water Vapor (Moisture)
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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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