Weather Alerts for Alaska

Recent Locations: Hurdsfield, ND New River, VA Tok, AK

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: Noatak Valley; Lower Koyukuk Valley; Upper Koyukuk Valley

5. Flood Watch for: South Slopes of the Western Brooks Range; Upper Kobuk Valleys

6. Flood Watch for: Southern Kenai Mtns

7. Flood Watch for: Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley; Northern Susitna Valley

8. Heat Advisory for: Prince of Wales Island; Ketchikan Gateway Borough; City of Hyder; Annette Island

9. High Wind Warning for: Anchorage

10. High Wind Warning for: Anchorage Hillside / Eagle River

11. 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

12. Hydrologic Outlook for: Kuskokwim Valley West; Kuskokwim Valley East; Interior Kuskokwim Delta; Western Capes; Northern Bristol Bay Coast; Inland Bristol Bay

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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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain