Aug 28, 2025
An atmospheric river moved up from the North Pacific into Southcentral Alaska and produced widespread moderate rainfall between August 27th and August 29th. Strong southerly flow during the rainfall event caused south-facing slopes of the mountains across Southcentral to get the highest rainfall totals due to enhancement from upslope flow, including the north end of the Susitna Valley, where 2.5 to locally 6 inches of rainfall was recorded between 8/27 and 8/29. The runoff from the heavy rainf
Source: NOAA National Weather Service Storm Events Database (event 1289479). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Susitna Valley County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.