667
NGAK88 PAFG 152032
HCMAFG
HYDROMETEOROLOGICAL COORDINATION MESSAGE
ALASKA-PACIFIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE ANCHORAGE AK
1121 AM AKDT SUN JUN 15 2025
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CONTACT:
KYLE VANPEURSEM 907-266-5161 907-350-9219 (CELL PHONE AFTER 5 PM)
LOCATION/KNOWN FLOOD AREA: COLVILLE RIVER FROM HORSEHOE BEND UPSTREAM TO UMIAT
PRODUCT TYPE: ADVISORY
EXPIRATION TIME: 48 HOURS
PRIMARY CAUSE: SNOW MELT/ICE JAMS
BASIS: HIGH WATER FROM SNOW MELT AND RECENT ICE JAMS IS LEADING TO MINOR FLOODING AT UMIAT. ASS OF NOON SUNDAY, WATER LEVELS AT
THE USGS COLVILLE RIVER GAGE AT UMIAT WERE AT 60.86 FT AND STILL RISING, THE HIGHEST ON RECORD SINCE THE GAGE WAS ESTABLISHED IN 2003.
WATER IS NOW OVER THE ROAD FROM CAMP TO THE AIRSTRIP, AS WELL AS THE FUEL PAD. WATER LEVELS ARE EXPECTED TO CONTINUE TO SLOWLY RISE
OVER THE NEXT 2 DAYS AS ADDITIONAL HIGH ELEVATION SNOW MELT IS EXPECTED TO MAKE ITS WAY DOWNSTREAM.
HIGH WATER EXTENDS DOWNSTREAM TO HORSESHOE BEND AND OCEAN POINT, WHERE SEVERAL ICE JAMS HAVE FORMED OVER THE PREVIOUS 24-HRS,
HELPING TO KEEP UPSTREAM WATER LEVELS ELEVATED. ONCE THESE ICE JAMS RELEASE, COMMUNITIES AND INFRASTRUCTURE DOWNSTREAM,
INCLUDING NUIQSUT, SHOULD PREPARE FOR AND EXPECT HIGH WATER AND POTENTIAL FLOODING IN THE NEXT COUPLE OF DAYS.
IMPACTS: FLOODING OF LOW LYING AREAS AROUND UMIAT, INCLUDING AREAS AROUND THE AIRSTRIP
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