Weather Alerts for Alaska

Recent Locations: Cylinder, IA Backus, MN Fairbanks, AK

1. Blizzard Warning for: Kivalina and Red Dog Dock; Baldwin Peninsula

2. Blizzard Warning for: Western Arctic Coast

3. Cold Weather Advisory for: City and Borough of Wrangell

4. Cold Weather Advisory for: Ketchikan Gateway Borough

5. Cold Weather Advisory for: Municipality of Skagway; Haines Borough and Klukwan; City and Borough of Sitka; City and Borough of Juneau; Western Kupreanof and Kuiu Island; City of Hyder; Annette Island

6. Cold Weather Advisory for: Petersburg Borough

7. Cold Weather Advisory for: Prince of Wales Island

8. Winter Storm Warning for: Interior Seward Peninsula; Eastern Norton Sound and Nulato Hills

9. Winter Storm Warning for: Noatak Valley; Lower Kobuk Valley

10. Winter Storm Warning for: Northern Denali Borough

11. Winter Storm Warning for: South Slopes of the Western Brooks Range; Upper Kobuk Valleys

12. Winter Storm Warning for: Tanana Flats; Eielson AFB and Salcha

13. Winter Storm Warning for: Upper Koyukuk Valley

14. Winter Storm Warning for: White Mountains and High Terrain South of the Yukon River; Upper Chena River Valley; Goldstream Valley and Nenana Hills; Chatanika River Valley; Two Rivers; Fairbanks Metro Area; Nenana; Central Interior

15. Winter Weather Advisory for: Central Brooks Range

16. Winter Weather Advisory for: Lower Koyukuk Valley; Middle Yukon Valley

17. Winter Weather Advisory for: Lower Yukon River

18. Winter Weather Advisory for: Northern Seward Peninsula

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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