High river levels due to increasing snowmelt occurred at Fort Yukon from the Porcupine River from May 20th to 25th. Water rose enough to flood a portion of the Sucker River Road.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS AFG wrote it up.
High river levels due to increasing snowmelt occurred at Fort Yukon from the Porcupine River from May 20th to 25th. Water rose enough to flood a portion of the Sucker River Road. Other low lying areas received flooding, but no structures were impacted, nor were other roads in town. The rapid snowmelt occurred due to above seasonal warming over eastern Alaska. Damage estimate is a guess on the coast of gravel used to repair the Sucker River Road.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Fairbanks, AK wrote its last area forecast discussion before the first event at May 20, 4:26 AM AKST, 4 hours 34 minutes earlier.
NORTHERN ALASKA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE FAIRBANKS AK 526 AM AKDT WED MAY 20 2015 UPDATED MARINE ADVISORIES .DISCUSSION... UPPER LEVEL...HIGHLY AMPLITUDE PATTERN WILL PERSIST INTO THE MID TERM FORECAST PERIOD. LONG WAVE HIGH PRESSURE OVER THE YUKON TERRITORY OF CANADA WITH RIDGING INTO INTERIOR ALASKA COMBINED WITH LONG WAVE LOW PRESSURE OVER THE SOUTHERN BERING SEA WILL PRODUCE STRONG SOUTHERLY FLOW ALOFT OVER MUCH OF WESTERN MAINLAND ALASKA. A SHORT WAVE WILL MOVING EAST OVER NORTHWEST ALASKA THURSDAY THROUGH FRIDAY WILL CUTOFF MUCH OF THE LONG SOUTHERLY FETCH THURSDAY NIGHT THROUGH FRIDAY NIGHT. RETURN FLOW WILL OCCUR DURING THE WEEKEND AS THE LONG WAVE PATTERN REBOUNDS FOLLOWING THE SHORT WAVES DEPARTURE. SURFACE...COLD FRONT EXTENDING FROM EASTERN RUSSIA TO THE BERING STRAIT...NOME...AND SAINT MARY'S WEDNESDAY AFTERNOON WILL MOVE EAST. THE FRONT WILL BE WEAKENING ALONG A LINE FROM BARROW SOUTH OVER THE CENTRAL INTERIOR THURSDAY AFTERNOON. ANOTHER COLD FRONT WILL FOLLOW A SIMILAR PATH THURSDAY THROUGH FRIDAY. THAT COLD FRONT WILL EXTEND FROM EAST OF BARROW AND SOUTH OVER GALENA AND ANVIK FRIDAY MORNING. STRONG HIGH PRESSURE OVER THE EASTERN INTERIOR WILL PREVENT THE FRONT FROM MAKING MUCH FURTHER PROGRESS EASTWARD. A THERMAL TROUGH FROM THE NEAR BETTLES TO EAGLE WEDNESDAY AFTERNOON WILL SHIFT TO A FORT YUKON TO EAGLE LINE THURSDAY AFTERNOON. THE THERMAL TROUGH WILL REFORM FROM THE CENTRAL INTERIOR TO THE MIDDLE TANANA VALLEY AND EAST TO CANADA SATURDAY AFTERNOON. NORTH SLOPE...FRONT MOVING NORTH FROM THE SOUTH CHUKCHI SEA WILL BRING RAIN SHOWERS TO THE NORTHWEST ARCTIC COAST TONIGHT AND EAST OF BARROW THURSDAY. COLD FRONT WILL MOVE EAST OF BARROW BY THURSDAY MORNING. HIGH PRESSURE BUILDING NORTH OF PRUDHOE BAY ON FRIDAY WILL DISSIPATE THE FRONT. EAST WINDS WILL INCREASE SATURDAY AS PRESSURE GRADIENT TIGHTENS BETWEEN THE ARCTIC HIGH AND LOW OVER THE NORTHEASTERN BERING. WEST COAST...COLD FRONT MOVING NORTH AND EAST OVER THE AREA WILL PRODUCE RAIN WITH AMOUNTS UP TO ONE QUARTER INCH TODAY THROUGH TONIGHT. PRECIPITATION TYPE WILL CHANGE TO SNOW FOR SAINT LAWRENCE ISLAND TONIGHT...BUT AMOUNTS WILL BE LIGHT. HIGH PRESSURE BUILDING THURSDAY NIGHT AND FRIDAY WILL BRING DRIER CONDITIONS. A RETURN TO RAIN AND SOUTHEAST WINDS IS FORECAST FOR FRIDAY NIGHT AND SATURDAY AS ANOTHER LOW MOVES EAST FROM THE WESTERN BERING SEA. INTERIOR...NEAR RECORD HIGH TEMPERATURES AND DRY CONDITIONS WILL PERSIST FOR THE EASTERN INTERIOR. THE CENTRAL TO WESTERN INTERIOR WILL HAVE MORE CLOUDS AND SOME ISOLATED RAIN SHOWERS THURSDAY AS A COLD FRONT MOVES OVER THAT AREA. ON FRIDAY...AFTER THE FRONT DISSIPATES...RH'S WILL FALL IN THE CENTRAL TO WESTERN INTERIOR. && .FIRE WEATHER...MODELS FORECAST A CONTINUATION OF VERY DRY CONDITIONS FROM THE CENTRAL INTERIOR EAST OVER THE REST OF THE INTERIOR THROUGH AT LEAST THE WEEKEND. ANY LIGHTNING STRIKES WHICH OCCUR IN NORTHERN ALASKA WILL BE LIMITED TO NEAR THE CANADIAN BORDER TODAY AND THURSDAY IN THE AFTERNOON AND EVENING. && .HYDROLOGY...FLOOD WARNING CONTINUES UNTIL FRIDAY AT 1115PM FOR PORCUPINE RIVER AT FORT YUKON. THE REST OF THE PORCUPINE RIVER FROM THE CANADIAN BORDER TO JUST UPRIVER OF FORT YUKON CONTINUES WITH A FLOOD WATCH THROUGH WEDNESDAY EVENING. FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON IN ZONE 203 FOR THE SAG... COLVILLE...AND KUPARUK RIVERS. DALTON HIGHWAY FLOOD ADVISORY IN EFFECT UNTIL WEDNESDAY AT 1000PM FROM MILEPOST 399 TO 405. && .AFG WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING FOR AKZ220-AKZ222-AKZ223-AKZ224-AKZ225-AKZ226- AKZ227. FLOOD WATCH FOR AKZ203-AKZ220. SMALL CRAFT ADVISORY FOR PKZ200-PKZ210-PKZ215-PKZ220. BRISK WIND ADVISORY FOR PKZ225-PKZ230-PKZ235-PKZ240-PKZ245. && DA MAY 15
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alaska in 2015Every state in 2015This day in weather historyWarnings in Alaska, May 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 582788.