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Flood — Juneau Borough, AK

Aug 13, 2021

A strong atmospheric river with sub-tropical moisture moved out of the north Pacific and over Southeast Alaska. This impacted the northern inner channels with 24 to 36 hours of heavy precipitation from a deep upper level trough with a long fetch transporting a significant amount of precipitable water over the complex terrain of the Alaska panhandle. ||This atmospheric river produced very high freezing level with very warm air going all the way up to 14,000 feet. The warm rain melted snow that wa

Source: NOAA National Weather Service Storm Events Database (event 979439). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Juneau Borough, AK

This event is one of many recorded floods in Juneau Borough County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Juneau Borough County flood data →

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