Weather Alerts for Alaska

Recent Locations: Woodmere, NY Underhill Center, VT Arctic Village, AK

1. Cold Weather Advisory for: Kuskokwim Delta Coast and Nunivak Island; Interior Kuskokwim Delta

2. Cold Weather Advisory for: Municipality of Skagway

3. Cold Weather Advisory for: Northern Copper Valley; Central Copper Valley; Tok Cutoff; McCarthy

4. Cold Weather Advisory for: Southern Kenai Mtns; West Prince William Sound & Whittier; Valdez

5. Cold Weather Advisory for: Thompson Pass

6. Winter Storm Watch for: City and Borough of Sitka; Western Kupreanof and Kuiu Island

7. Winter Storm Watch for: Glacier Bay; Eastern Chichagof Island; Cape Fairweather to Lisianski Strait; Admiralty Island; City and Borough of Juneau

8. Winter Weather Advisory for: Bering Strait Coast

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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 Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds