Weather Alert in Alaska

Recent Locations: Alva, FL   Amherst, TX   Denali National Park, AK  
Current Alerts for Denali National Park, AK: Flood Advisory

Flood Advisory issued August 28 at 3:47PM AKDT until August 30 at 12:00PM AKDT by NWS Fairbanks AK

AREAS AFFECTED: Upper Kobuk Valleys

DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Kobuk River at Kobuk. * WHEN...Until noon AKDT Saturday. * IMPACTS...Minor flooding in low-lying and poorly drained areas. The old road is flooded and water levels are near new road. Several residences are surrounded by water. * ADDITIONAL DETAILS... - As of Thursday morning the public has reported minor flooding in Kobuk. Between 3 and 5 inches of rain have fallen since Monday. Continued moderate rainfall is possible through Friday. - http://www.weather.gov/aprfc

INSTRUCTION: Monitor river levels and be ready to take action to preserve life and property.

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Current U.S. National Radar--Current

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Weather Topic: What is Hail?

Home - Education - Precipitation - Hail

Hail Next Topic: Hole Punch Clouds

Hail is a form of precipitation which is recognized by large solid balls or clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind. As the hailstones remain in the updraft, ice is deposited onto them until their weight becomes heavy enough for them to fall to the earth's surface.

Hail storms can cause significant damage to crops, aircrafts, and man-made structures, despite the fact that the duration is usually less than ten minutes.

Next Topic: Hole Punch Clouds

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

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