Ice Jam flooding occurred along the Kuskokwim River near Kwethluk during the spring breakup.
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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 AFC wrote it up.
Ice Jam flooding occurred along the Kuskokwim River near Kwethluk during the spring breakup.
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 Anchorage, AK wrote its last area forecast discussion before the first event at May 13, 1:00 PM AKST, 8 hours earlier.
SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ANCHORAGE AK 200 PM AKDT SUN MAY 13 2012 .MODEL DISCUSSION...MODELS ARE IN FAIR AGREEMENT THROUGH THE NEXT 48 HRS. THE ECMWF MODEL OVERALL HANDLES THE LOW OVER THE NORTHERN GULF AND COMPLEX OUT WEST THE BEST AND WILL BE USED FOR THE FORECAST PACKAGE. .ANALYSIS AND UPPER LEVELS... .500 MB...A COLD LOW NEAR KODIAK MOVES EAST TO OVER SOUTHEAST ALASKA TUE EVENING. A HIGH AMPLITUDE RIDGE OVER THE EASTERN BERING SEA MOVES TO OVER THE WESTERN HALF OF THE MAINLAND TUESDAY. A COLD LOW OVER THE KAMCHATKA PENINSULA INTENSIFIES AS IT DROPS SOUTH OF THE WESTERN ALEUTIANS TUESDAY. .SURFACE... THE SNOWFALL OVER NORTHERN KODIAK ISLAND WILL CONTINUE TO DIMINISH THROUGH THIS AFTERNOON AS THE SURFACE LOW WEAKENS. A SECONDARY LOW DEVELOPS SOUTHEAST OF KODIAK THIS AFTERNOON AND MOVES TO THE NORTH CENTRAL GULF OF ALASKA TONIGHT. THIS LOW WILL LIKELY BRING GALES TO THE GULF AND POTENTIALLY STRONG WINDS TO THE NORTH GULF COAST TONIGHT. THE HIGH PRESSURE RIDGE OVER THE EASTERN BERING SEA PROGRESSES EAST TONIGHT TO OVER THE GULF AND CENTRAL MAINLAND BY TUE. THE LOW CENTER SOUTH OF THE WESTERN ALEUTIANS MOVES TO THE NORTHEAST BERING SEA TUE AND WEAKENS. A SECONDARY CENTER NEAR THE KAMCHATKA PENINSULA TODAY MOVES SOUTH OF THE CENTRAL ALEUTIANS TUE. .SHORT TERM FORECAST... .SOUTHCENTRAL...SHOWERS WILL CONTINUE ACROSS MUCH OF THE GULF COAST THROUGH TONIGHT AS THE UPPER TROUGH AND SURFACE CENTER PROCESS EAST. SHOWERS ARE EXPECTED ACROSS MUCH OF THE GULF COAST. SHOWERS WILL BE MIXED AT TIMES AS TEMPERATURES CONTINUE TO COOL ALOFT THROUGH MON. COOLING TEMPS ALOFT MAY ALSO TRIGGER AFTERNOON AND EVENING THUNDERSTORMS OVER THE COPPER RIVER BASIN AND THE TALKEETNA MOUNTAINS TODAY AND MON. GALES ARE EXPECTED OVER THE NORTH GULF OF ALASKA TONIGHT WITH THE DEVELOPING SURFACE LOW. A WEAK BARRIER JET WILL ALSO BRING BRISK EASTERLY WINDS TO THE NORTH GULF GULF TONIGHT. DRIER AND WARMER WEATHER IS ON THE WAY WITH THE RIDGE TUE AND WED. BEARING SEA/ALEUTIANS...PERIODS OF GALES AND WARMING CONDITIONS ARE EXPECTED OVER THE REGION OVER THE NEXT DAY OR SO AS A SERIES OF LOWS IMPACT THE AREA. PRECIPITATION TYPE SHOULD CHANGE FROM MIXED TO GENERALLY RAIN OR SHOWERS. FOR SW AK...MIXED SHOWERS ARE EXPECTED INLAND AREAS AND BRISTOL BAY TONIGHT...AND MAINLY INLAND ON MON. CONDITIONS OVER ALL WILL STABILIZE AS HIGH PRESSURE BUILDS IN FROM THE WEST MON AND TUE. EXPECT STRATUS AND FOG TO AFFECT THE COASTS WITH THE BUILDING RIDGE AND IMPACT AVIATION OPERATIONS MON AND TUE. .LONG TERM FORECAST... THE WEST WILL CONTINUE TO HAVE RAIN UNTIL A RIDGE BUILDS IN AT THE END OF THE WEEK. SW AK WILL REMAIN DRY UNTIL SOME SHOWERS ARRIVE ON FRI. SE OF THE AK RANGE WILL REMAIN DRY UNTIL AFTERNOON AND EVENING MOUNTAIN CONVECTION RETURN AT WEEKS END AS THE THERMAL TROUGH REDEVELOPS ALONG THE AK RANGE. .AER/ALU...WATCH/WARNING SUMMARY PUBLIC...FLOOD WATCH 155. MARINE...GALES 120 172 175 351 413 FIRE WEATHER...NONE. RMC MAY 12
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Alaska River Forecast Office team in the area reported the flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alaska in 2012Every state in 2012This day in weather historyWarnings in Alaska, May 2012
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: 374627.