Weather Alerts for Alaska
1. High Wind Warning for: Southern Kenai Mtns
2. High Wind Warning for: Thompson Pass
3. High Wind Watch for: Kodiak Island Northeast
4. Wind Advisory for: Valdez
5. Winter Storm Warning for: Central Beaufort Sea Coast; Eastern Beaufort Sea Coast; Central Arctic Plains; Central Brooks Range; Romanzof Mountains
6. Winter Storm Warning for: Dalton Highway Summits; White Mountains and High Terrain South of the Yukon River
7. Winter Storm Warning for: Eastern Norton Sound and Nulato Hills
8. Winter Storm Warning for: Northern Denali Borough
9. Winter Storm Warning for: Southern Seward Peninsula Coast; Interior Seward Peninsula
10. Winter Storm Warning for: Upper Chena River Valley; Tanana Flats; Eielson AFB and Salcha; Goldstream Valley and Nenana Hills; Chatanika River Valley; Two Rivers; Fairbanks Metro Area; Nenana; Central Interior
11. Winter Storm Warning for: Upper Koyukuk Valley
12. Winter Weather Advisory for: Bering Strait Coast
13. Winter Weather Advisory for: Central Copper Valley; Tok Cutoff
14. Winter Weather Advisory for: Glacier Bay; City and Borough of Juneau
15. Winter Weather Advisory for: Kivalina and Red Dog Dock; Baldwin Peninsula
16. Winter Weather Advisory for: Northern Alaska Peninsula; Bristol Bay Borough (Naknek and King Salmon); Lake Iliamna / Nila Vena / Nanvarpak
17. Winter Weather Advisory for: Northern Seward Peninsula
18. Winter Weather Advisory for: Petersburg Borough
19. Winter Weather Advisory for: Upper Tanana Valley; Delta Junction; Eastern Alaska Range North of Trims Camp
20. Winter Weather Advisory for: Yukon Flats; Fortymile Country
Want more detail? Get the Complete 7 Day and Night Detailed Forecast!
Current U.S. National Radar--Current
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National Weather Forecast for Tomorrow
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North America Water Vapor (Moisture)
This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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