Weather Alerts for Alaska
1. Flood Advisory for: SW Kenai Peninsula
2. High Surf Advisory for: SW Kenai Peninsula
3. Wind Advisory for: Eastern Alaska Range North of Trims Camp
4. Wind Advisory for: Municipality of Skagway
5. Winter Storm Warning for: Eastern Alaska Range South of Trims Camp
6. Winter Storm Warning for: Eastern Norton Sound and Nulato Hills
7. Winter Storm Warning for: Lower Yukon and Innoko Valleys; Upper Kuskokwim Valley
8. Winter Storm Warning for: Middle Yukon Valley
9. Winter Weather Advisory for: Central Susitna Valley
10. Winter Weather Advisory for: Dalton Highway Summits
11. Winter Weather Advisory for: Northern Copper Valley; Northern Susitna Valley
12. Winter Weather Advisory for: Shishmaref; Bering Strait Coast
13. Winter Weather Advisory for: Southern Denali Borough
14. Winter Weather Advisory for: St Lawrence Island
15. Winter Weather Advisory for: Tanana Flats; Eielson AFB and Salcha; Goldstream Valley and Nenana Hills; Fairbanks Metro Area; Nenana
16. Winter Weather Advisory for: White Mountains and High Terrain South of the Yukon River; Upper Chena River Valley; Chatanika River Valley; Two Rivers; Central Interior
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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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