Weather Alert in Alaska
Flood Warning issued September 1 at 9:34AM AKDT until September 2 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Koyukuk River near Allakaket. * WHEN...Until noon AKDT Tuesday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is occurring. * ADDITIONAL DETAILS... - At 930 AM AKDT, - River levels have continued to come down, but inundation of low lying roads is expected to continue. The streamgage on the Koyukuk River below the John River has shown over a foot of water level drop in the last 12 hours once again. The Middle and South Forks of the Koyukuk are also showing decreasing water levels. Water levels at Allakaket should continue to drop. This is encouraging as an additional 0.50 to 1 inch of rain is forecast for the south slopes of the Brooks Range through Tuesday. - Low lying roads are currently flooded and airport access may be cut off. - http://www.weather.gov/aprfc
INSTRUCTION: N/A
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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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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