The Skilak Glacial Lake released resulting in flooding along the Kenai River from the outburst.
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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.
The Skilak Glacial Lake released resulting in flooding along the Kenai River from the outburst.
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 Aug 14, 4:00 AM AKST, 4 hours 30 minutes earlier.
AREA FORECAST DISCUSSION SOUTHCENTRAL AND SOUTHWEST ALASKA 500 AM AKDT FRI AUG 14 2009 .ANALYSIS AND UPPER LEVELS... WELL DEFINED UPPER LEVEL LONG WAVE TROUGH EXTENDS OUT OF THE POLAR REGIONS AND INTO THE EASTERN AND CENTRAL BERING SEA. TROUGH IS EXPECTED TO REMAIN NEARLY STATIONARY AND STRENGTHEN THROUGH THE WEEKEND. MODEST RIDGE OF HIGH PRESSURE SURFACE AND ALOFT HOLDS OVER SOUTHEAST ALASKA AND THE EASTERN GULF OF ALASKA. A SMALL 1006 MB LOW ABOUT 250 MILES SOUTH OF THE EASTERN ALEUTIANS WILL STRENGTHEN TO 998 MB AS IT MOVES TO NEAR CHIGNIK BY LATE FRI NIGHT. THE LOW WILL THEN TRACK DUE NORTHWARD INTO THE SOUTHWESTERN INTERIOR BY SUN MORNING. .MODEL DISCUSSION... MODELS IN GENERALLY GOOD AGREEMENT THROUGH 60 HOURS...BUT POOR RUN TO RUN CONSISTENCY BEGINS AT 24 HOURS. NEW RUNS MUCH SLOWER ON SYSTEM SOUTH OF THE ALEUTIAN CHAIN. OLD RUNS MOVED THE LOW DIRECTLY ACROSS KODIAK ISLAND AND INTO COOK INLET. NEW RUNS MOVE IT JUST SOUTH OF THE ALASKA PENINSULA TO NEAR CHIGNIK AND THEN NORTHEASTWARD INTO THE BRISTOL BAY REGION. 00Z FRI GFS PREFERRED OPERATIONALLY THROUGH THE SHORT TERM. TRENDED TOWARDS THE 00Z FRI ECMWF IN THE MID AND LONG RANGES. .SHORT TERM FORECAST... UPPER LEVEL PATTERN IS CONDUCIVE TO THE CONTINUOUS PUMPING OF MOISTURE ACROSS THE SOUTHERN HALF OF THE STATE. PERIODS OF RAIN WILL CONTINUE THROUGH THE WEEKEND. GUSTY SOUTH AND SOUTHEAST WINDS EXPECTED ALONG THE NORTHEASTERN AND SOUTHEASTERN FLANK OF THE LOW MOVING TOWARDS CHIGNIK. .LONG TERM FORECAST... UPPER LEVEL LONG WAVE TROUGH GRADUALLY SHIFTS EASTWARD. MOISTURE ADVECTION INTO SOUTHCENTRAL AND SOUTHWESTERN ALASKA WILL GRADUALLY TAPER OFF. .AER/ALU...WATCH/WARNING SUMMARY PUBLIC...NONE. MARINE...GALE 132 FIRE WEATHER...NONE. ASB AUG 09
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Reconnaissance of the Skilak Lake by the Kenai Peninsula Borough revealed the glacial dam release.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alaska in 2009Every state in 2009This day in weather historyWarnings in Alaska, August 2009
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: 188237.