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 for Tomorrow
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North America Water Vapor (Moisture)
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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
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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