Sep 15, 2025
A strong low pressure system moved out of the North Pacific Ocean on September 14th and into the Gulf of Alaska through September 15th. The weather front associated with this strong low tapped into sub-tropical moisture as it lifted out of the North Pacific and transported this moisture in a very narrow but long plume which is described as an atmospheric river. ||This atmospheric river moved over the Ketchikan area of Southeast Alaska through Monday and produced very heavy, localized, rain for a
Source: NOAA National Weather Service Storm Events Database (event 1293441). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Ketchikan Gateway Borough County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.