Weather Alerts for Alaska
1. Cold Weather Advisory for: Kuskokwim Valley West; Kuskokwim Valley East; Lime Village
2. Cold Weather Advisory for: North Slopes of the Western Alaska Range
3. Cold Weather Advisory for: Southern Denali Borough; Eastern Alaska Range South of Trims Camp
4. Cold Weather Advisory for: Southern Kenai Mtns
5. Cold Weather Advisory 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. Cold Weather Advisory for: Upper Tanana Valley
7. High Wind Warning for: Kodiak Island Northeast
8. High Wind Warning for: Southern Kenai Mtns
9. High Wind Warning for: Thompson Pass
10. Special Weather Statement for: Central Aleutians
11. Wind Advisory for: Valdez
12. Winter Weather Advisory for: Cape Fairweather to Lisianski Strait
13. Winter Weather Advisory for: City and Borough of Juneau
14. Winter Weather Advisory for: City and Borough of Sitka; Prince of Wales Island
15. Winter Weather Advisory for: Municipality of Skagway
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Current U.S. National Radar--Current
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National Weather Forecast--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 Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
Weather Topic: What are Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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