NGAK89 PAFG 182037
HCMAFG

HYDROMETEOROLOGICAL COORDINATION MESSAGE
ALASKA-PACIFIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE ANCHORAGE AK
1:00 PM AKDT Sun Aug 18 2024

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CONTACT:
David Streubel  907-266-5161     907-350-9219 (CELL PHONE AFTER 5 PM)


LOCATION/KNOWN FLOOD AREA: Koyukuk River and Koyukuk River 
tributaries

PRODUCT TYPE: ESF

EXPIRATION TIME: Wednesday 4PM

PRIMARY CAUSE: 
	Options: Excessive rainfall

BASIS:	2-3 inches of rain over past two days along with another 1-2 
inches during the next 12 hours will cause rapid increases in stream 
levels. Tributaries to the Koyukuk River could reach bankfull levels 
by Sunday evening.

The Koyukuk River at Bettles and Allakaket will rise significantly 
over the next 24 hours and crest late Monday or Tuesday. River 
levels at Bettles and Allakaket are currently forecast to remain 
below flood stage. The Koyukuk River at Hughes is expected to crest 
Wednesday below flood stage.
        

IMPACTS:	Expect rapid water level increases over next 24 hours on 
rivers and streams in the Koyukuk River basin. Minor overbank 
flooding of some Koyukuk River tributaries is possible. 



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