Alaska, 2004Flood in Alaska, August 26, 2004
August 26, 2004 · NWS AFC · 1 event in 1 county or zone
1 flood, as filed by the National Weather Service.
- Deaths
- 0
- Injuries
- 0
- Property damage
- $10,000
- Crop damage
- None recorded
- Events
- 1
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.
What forecasters said that day
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 26, 10:30 AM AST, 2 hours 30 minutes earlier.
Area forecast discussion, Aug 26, 10:30 AM AST, 2 hours 30 minutes before
AREA FORECAST DISCUSSION SOUTHWEST ALASKA
1130 AM ADT THU AUG 26 2004
.DISCUSSION...AN UPPER LEVEL LOW OVER THE KUSKOKWIM VALLEY WITH A
TROUGH INTO THE SOUTHERN BERING SEA. PLENTY OF MOISTURE ALONG THE
TROUGH INTO SOUTHWEST AND SOUTHCENTRAL ALASKA. THE JET AXIS IS JUST
SOUTH OF THIS TROUGH AXIS. AREAS OF RAIN WITH SCATTERED THUNDERSTORMS
TO AREAS EAST OF A LINE FROM MCGRATH TO KING SALMON. ONLY ISOLATED
ACTIVITY JUST WEST OF THIS LINE. NORTHERLY FLOW BEHIND THE LOW WILL
BRING COOLER AND DRIER AIR TO KUSKOKWIM DELTA TODAY.
THE TROUGH AXIS IN THE BERING SEA TO SWING AROUND THE LOW TONIGHT.
THIS IN COMBINATION WITH A SHORT WAVE TROUGH IN NORTHERN PACIFIC WILL
HELP TO START SWINGING THE LOW TO THE EAST FRIDAY. THE LOW WILL MOVE
INTO THE GULF SATURDAY AND SLOWLY MOVE THROUGH THE GULF SUNDAY. WOULD
EXPECT PERIODS OF RAIN OVER SOUTHCENTRAL ALASKA THROUGH SATURDAY.
SOME UPPER LEVEL DIVERGENCE OVER SOUTHCENTRAL ALASKA TODAY TO SUPPORT
HEAVY RAIN AT TIMES. JET ASSOCIATED WITH THE UPPER LEVEL LOW WEAKENS
INTO TOMORROW THOUGH...SO HEAVIER RAINFALL MORE LIKELY TODAY.
INSTABILITY TO BE HIGH WITH THE COLD CORE UPPER LEVEL LOW AS IT
PROGRESSES OVER THE GULF SATURDAY AND SUNDAY. THIS LOW TO BE PUSHED
OUT OF THE GULF BY A RIDGE OF HIGH PRESSURE MONDAY AS A LOW DEVELOPS
IN THE WESTERN ALEUTIANS.
HIGH PRESSURE TO DEVELOP OVER THE WESTERN BERING SEA AS THE TROUGH
SWINGS TO THE SOUTH OF THE LOW FRIDAY. AS THE LOW OVER THE SUSITNA
VALLEY MOVES EAST...SHOWERS AND THUNDERSTORMS WILL END OVER THE
ALASKA PENINSULA...KUSKOKWIM VALLEY AND BRISTOL BAY AREA. THE HIGH
PRESSURE AXIS TO MOVE THROUGH THE ALEUTIAN CHAIN OVER THE WEEKEND.
ANOTHER LOW PRESSURE SYSTEM WILL MOVE INTO THE WESTERN ALEUTIANS
SATURDAY AFTERNOON. THIS WILL BRING A FRONT INTO THE CENTRAL
ALEUTIANS SUNDAY NIGHT THEN SPREAD SHOWERS OVER THE ENTIRE BERING AS
AN UPPER LEVEL LOW DEVELOPS OVER THE WESTERN ALEUTIANS.
.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...NONE
FIRE WEATHER...NONE
JN AUG 04
Flood, Anchorage Muni to Bird Creek
- When
- August 26, 1:00 PM AST to 9:00 PM AST
- Where
- Anchorage Muni to Bird Creek forecast zone
- Property damage
- $10,000
- Reported by
- AWOS,ASOS,MESONET,ETC
Heavy rainfall occurred across the Anchorage bowl when a convective boundary formed over northern Cook Inlet. Rainfall reports estimated as much as 5 and a half inches of rain in the Anchorage area over the course of two evenings, August 25tha and 26th. The ground and storm drain system was saturated from the previous nights rainfall from thunderstorms. This resulted in extreme ponding in many low lying streets and businesses located in low lying areas around town.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Tornadoes and Flash Flood in Iowa, August 26 to 27, 2004$915,000 · F1 · 76 events
- Damaging Winds in Wisconsin, August 26 to 27, 2004$710,000 · 70 kt wind · 16 events
- Tornado in Iowa, August 26, 2004F2 · 1 event
- Tornado in Iowa, August 26, 2004F2 · 1 event
- Flash Flooding and Damaging Winds in Iowa, August 26 to 27, 20041 injured · $191,000 · 65 kt wind · 15 events
- Tornado in Iowa, August 26, 2004$95,000 · F1 · 1 event
- Damaging Wind in Washington, August 26, 2004$40,000 · 60 kt wind · 1 event
- Flash Flooding in Illinois, August 26, 2004$30,000 · 5 events
- Tornado in Colorado, August 26, 2004$3,000 · F1 · 1 event
- Tornado in Iowa, August 26, 2004$10,000 · F1 · 1 event
- Tornado in Iowa, August 26, 2004$10,000 · F1 · 1 event
- Hail and Damaging Winds in Wisconsin, August 26 to 27, 20041 injured · 1.75 in hail · 11 events
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: 5412942.