Weather Alerts for Alaska
1. Flood Advisory for: Upper Kobuk Valleys
2. Flood Advisory for: Upper Koyukuk Valley
3. Flood Watch for: Kuskokwim Valley West; Kuskokwim Valley East; Northern Bristol Bay Coast; Inland Bristol Bay
4. Flood Watch for: South Slopes of the Western Brooks Range; Noatak Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
5. Flood Watch for: Southern Kenai Mtns
6. Flood Watch for: Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley; Northern Susitna Valley
7. Heat Advisory for: Prince of Wales Island; Ketchikan Gateway Borough; City of Hyder; Annette Island
8. High Wind Warning for: Anchorage
9. High Wind Warning for: Anchorage Hillside / Eagle River
10. Hydrologic Outlook for: Anchorage; Anchorage Hillside / Eagle River; East Turnagain Arm; Portage; Lower Matanuska Valley; Hatcher Pass; Sutton / Upper Matanuska Valley; Eureka / Tahneta Pass; Southern Kachemak Bay; SW Kenai Peninsula; NW Kenai Peninsula; Skilak Lake; Southern Kenai Mtns; Interior Kenai Peninsula; Turnagain Pass; West Prince William Sound & Whittier; Tyonek; Valdez; Thompson Pass; Cordova; Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley; Northern Susitna Valley
11. Hydrologic Outlook for: Kuskokwim Valley West; Kuskokwim Valley East; Interior Kuskokwim Delta; Western Capes; Northern Bristol Bay Coast; Inland Bristol Bay
12. Hydrologic Outlook for: South Slopes Of The Central Brooks Range; South Slopes of the Western Brooks Range; Noatak Valley; Lower Kobuk Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
13. Hydrologic Outlook for: South Slopes Of The Central Brooks Range; South Slopes of the Western Brooks Range; Noatak Valley; Lower Kobuk Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
14. Special Weather Statement for: Lower Matanuska Valley
15. Wind Advisory for: Delta Junction
16. Wind Advisory for: Eastern Alaska Range North of Trims Camp; Eastern Alaska Range South of Trims Camp
17. Winter Storm Warning for: Central Arctic Plains; Central Brooks Range
18. Winter Storm Warning for: Western Arctic Plains; Howard Pass and the Delong Mountains
19. Winter Weather Advisory for: Central Beaufort Sea Coast
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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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