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: Upper Tanana Valley
5. Extreme Cold Watch for: Southern Kenai Mtns
6. 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
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
16. Winter Weather Advisory for: Petersburg Borough
17. Winter Weather Advisory for: Tok Cutoff
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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 Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
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