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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