956  
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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