Weather Alerts for Alaska
1. Flood Advisory for: Central Interior
2. Flood Advisory for: Upper Kobuk Valleys
3. Flood Warning for: Lower Koyukuk Valley
4. Flood Warning for: Upper Koyukuk Valley
5. Flood Warning for: Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley
6. Flood Watch for: South Slopes of the Western Brooks Range; Noatak Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
7. Heat Advisory for: Haines Borough and Klukwan; City and Borough of Juneau; Prince of Wales Island; Ketchikan Gateway Borough; Annette Island
8. Hydrologic Outlook for: Fairbanks Metro Area
9. Hydrologic Outlook for: Fairbanks Metro Area
10. Hydrologic Outlook for: Fairbanks Metro Area
11. Hydrologic Outlook for: Northern Bristol Bay Coast
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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 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
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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