Weather Alert in Alaska
Hydrologic Outlook issued August 27 at 2:10PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: South Slopes Of The Central Brooks Range; South Slopes of the Western Brooks Range; Noatak Valley; Lower Kobuk Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
DESCRIPTION: ESFAFG The headwater tributaries of the Koyukuk, Kobuk and Noatak Rivers have received substantial rainfall in the last several days leading to record crests at Slate Creek near Coldfoot (30 years of record) and Dahl Creek near Kobuk (39 years of record). Rainfall is expected to continue in the Western and Central Brooks Range through Friday, keeping water levels on rivers high and continued standing water in poorly drained areas. The crests from the early week rainfall are making their way down the main stems of the Kobuk, Koyukuk, and Noatak Rivers through the end of the week. Expect river levels to remain high through the weekend.
INSTRUCTION: N/A
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Weather Topic: What are Cumulonimbus Clouds?
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The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
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Weather Topic: What is Drizzle?
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Drizzle is precipitation in the form of water droplets which are
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Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
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