Weather Alerts for Alaska
1. Blizzard Warning for: St Lawrence Island
2. Flood Advisory for: SW Kenai Peninsula
3. High Surf Advisory for: SW Kenai Peninsula
4. Special Weather Statement for: Delta Junction; Tanana Flats; Eielson AFB and Salcha; Goldstream Valley and Nenana Hills; Fairbanks Metro Area; Nenana; Northern Denali Borough
5. Special Weather Statement for: Northern Seward Peninsula; Upper Kobuk Valleys; Shishmaref; Bering Strait Coast; Southern Seward Peninsula Coast; Interior Seward Peninsula; Lower Koyukuk Valley
6. Special Weather Statement for: South Slopes Of The Eastern Brooks Range; South Slopes Of The Central Brooks Range; Upper Koyukuk Valley; Yukon Flats
7. Special Weather Statement for: Thompson Pass
8. Wind Advisory for: Eastern Alaska Range North of Trims Camp
9. Wind Advisory for: Municipality of Skagway
10. Winter Storm Warning for: Eastern Alaska Range South of Trims Camp
11. Winter Storm Warning for: Eastern Norton Sound and Nulato Hills
12. Winter Storm Warning for: Lower Yukon and Innoko Valleys; Upper Kuskokwim Valley
13. Winter Storm Warning for: Middle Yukon Valley
14. Winter Storm Warning for: Yukon Delta Coast; Lower Yukon River
15. Winter Weather Advisory for: Dalton Highway Summits
16. Winter Weather Advisory for: Northern Copper Valley; Northern Susitna Valley
17. Winter Weather Advisory for: Shishmaref; Bering Strait Coast
18. Winter Weather Advisory for: Southern Denali Borough
19. 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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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
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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