Weather Alerts for Alaska

Recent Locations: Fillmore, IL Santee, CA Mekoryuk, AK

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

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

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