Flood in Alaska
Every flood event the National Weather Service has filed in Alaska, year by year, with the most significant episodes. Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
The most significant on the map
The most significant flood episodes in Alaska.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 497
- Deaths
- 2
- Injuries
- 0
- Damage
- $287 million
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Flash Flood and Debris Flow in Alaska, August 18 to 19, 2015A strong front moved through the Panhandle on the morning of Tuesday August 18th. This system had abundant amount of moisture associated with the cold front as the system originated from the North Pacific and was able to tap into tropical moisture.
- Debris Flows and Flooding in Alaska, December 1 to 5, 2020A large plume of concentrated moisture or Atmospheric River (AR) with an associated low-pressure system moved across the Pacific Ocean and transported tropical moisture from the southwest which impacted Southeast Alaska (SEAK) from December 1st through December 2nd.
- Flooding and High Wind in Alaska, September 14 to 30, 2012A series of strong, wet storm systems hit Southcentral Alaska in mid-September. Each storm followed nearly the same track along the Alaska Peninsula then along the Bering Sea coast, setting up a strong moist fetch into the Southcentral Alaska.
- Flooding and Coastal Flood in Alaska, October 11 to 13, 2025The remnants of Typhoon Halong in the northern Pacific Ocean began approaching the Bering Sea on Saturday, October 11, 2025, as they merged with a deep upper-level low east of Russia’s Kamchatka Peninsula.
- Flooding and Coastal Flood in Alaska, October 8 to 12, 2006A strong storm in the north Pacific moved into the eastern Bering Sea Monday October 8th. This storm produced strong wind along and in advance of a strong weather front associated with the storm.
- Flooding in Alaska, August 18 to 24, 2006Widespread heavy rain fell over much of central and south central Alaska beginning August 17th and continuing through August 23rd. Heavier rains Friday caused rises on both gauged and un gauged rivers throughout this area.
- Flood in Alaska, July 10 to 12, 2010An area of low pressure moved out of the Gulf of Alaska and to the Alaska-Yukon border on the 11th. As the low moved southeast and into the southern Yukon moisture wrapped around the low and produced heavy rainfall across the Fortymile County.
- Flooding in Alaska, October 23 to 31, 2002Rain began to fall across the Kenai Peninsula October 22nd. The rain continued to fall at moderate to heavy rates through the 24th of October.
- Flood in Alaska, May 20 to 25, 2015Warm temperatures and extreme snow melt and ice jams caused flooding of the Sagavanirktok (Sag) River for portions of the Dalton Highway and northward to the Deadhorse airport.|Several construction pads south of the airport were flooded on the west side of the highway.
- Flood in Alaska, May 27 to 31, 2013An ice jam formed at Bishop Rock on the Yukon River, downstream of Galena on the 26th and caused water to back up. flooding began during mid-morning of the 27th and flood waters did not recede until the 31st.
- Flooding in Alaska, May 24 to 31, 2013Ice jams combined with warm temperatures accelerated snow melt in the Copper River basin in late May. This caused the Gulkana river to reach moderate flood stage at a number of locations along the river.
- Flood in Alaska, May 9 to 12, 2009The breakup front stopped just downstream of Stevens Village during the late morning hours on the 9th, and solid ice was in place where the river stops braiding and entering the canyon below Stevens Village.
- Flood in Alaska, August 5 to 6, 2023Since 2011, Suicide Basin, a side valley that is dammed by the Mendenhall Glacier, fills with water from snowmelt and rainfall then drains during the summer as a glacial outburst flood.
- Flood in Alaska, August 5 to 6, 2024Since 2011, Suicide Basin, a side valley that is dammed by the Mendenhall Glacier, fills with water from snowmelt and rainfall then drains during the summer as a glacial outburst flood.
- Flooding in Alaska, July 28 to 31, 2008On the night of the 27th a frontal system moved from the Gulf of Alaska northwest over the southern interior to near Fairbanks on the evening of the 28th, then moved slowly back to the southeast before dissipating on the 29th.
- Flood in Alaska, May 4 to 7, 2009A flood of historic proportions began in Eagle along the Yukon River around 2 am on the morning of the 4th.
- Flooding in Alaska, September 21 to 27, 2017Snow Lake, a glacier-dammed lake in the Kenai Mountains, released on September 16th. The draining of the lake caused the Snow River, Kenai Lake, and the Kenai River to rise significantly.
- Flood in Alaska, July 23 to 24, 2010Just 10 days after a record flood impacted the Fortymile River and its tributaries another flood impacted the area. Water levels returned to pre-flood levels, however, occasional showers and saturated soils resulted in more significant rises than would normally be observed.
- Flood in Alaska, May 12 to 14, 2009Ice Jammed about 50 miles downstream of Tanana on the 11th and ice continued to pack into the back of the jam and stopped near the village of Tanana on the morning of the 12th. Flooding began in Tanana at approximately 4 am on the 12th.
- Flood in Alaska, August 12 to 13, 2025Since 2011, Suicide Basin, a side valley that is dammed by the Mendenhall Glacier, fills with water from snowmelt and rainfall then drains during the summer as a glacial outburst flood.
- Flooding in Alaska, September 20 to 30, 2012A series of strong, wet storm systems hit Southcentral Alaska in mid-September. Each storm followed nearly the same track along the Alaska Peninsula then along the Bering Sea coast, setting up a strong moist fetch into the Southcentral Alaska.
- Flood and High Wind in Alaska, October 22, 2004A moderate low moved from the southwest Bering Sea to the Bering Strait Friday evening, October 22nd. This resulted in strong gusty west wind that briefly peaked at 85 mph in the Pribilof Islands.
- Flood in Alaska, April 19 to 24, 2021As a result of snowmelt, an ice jam occurred at Anchor Point, and held for several days, causing flooding of Anchor River Road and the nearby campgrounds.
- Flooding in Alaska, May 3 to 14, 2009The annual spring river ice break up resulted in extensive flooding along the Kuskokwim river over the 11 days it took for the river to open up from its head waters in the Kuskokwim Valley to the mouth of the Kuskokwim River on the Bering Sea coast.
- Flooding in Alaska, October 1 to 4, 2003A tropically connected storm over the southwest Gulf of Alaska produced a long wet southerly fetch into the south central region of Alaska.
More
Sources
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.