Weather Alert in Alaska
Flood Watch issued August 30 at 9:21PM AKDT until September 3 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: South Slopes of the Western Brooks Range; Noatak Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by last week's excessive rainfall continues to be possible. High river levels are expected to continue into the upcoming week due to additional rainfall amounts of 1 to 3 inches. * WHERE...Including the Noatak, Kobuk, and Koyukuk Rivers. * WHEN...Through Wednesday morning. * IMPACTS...Excessive runoff from last week's rainfall is resulting in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Flooding of roadways has been reported in Kobuk and Allakaket. River levels are also expected to rise above flood stage in Hughes Saturday afternoon. An additional 1 to 2 inches of rainfall is expected Saturday afternoon through Tuesday, which is forecast to prolong high water levels. - Http://www.weather.gov/aprfc
INSTRUCTION: Persons living along streams should stay alert and be prepared to take action if a warning or advisory is issued, or flooding is observed. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information.
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Weather Topic: What is Hail?
Home - Education - Precipitation - 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
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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