Alaska Severe Flood Watch | Effective 10/18/2026 21:45

An atmospheric river is expected to move into the NE Gulf Coast Monday night and continue through Tuesday. Multiple periods of heavy rain are expected for the Icy Strait corridor and northeast Gulf Coast, including the following communities: Yakutat, Elfin Cove, Pelican, Gustavus, Juneau, Haines, and Skagway. Elevated gusty winds are expected alongside this heavier rainfall, with the strongest winds from the southwest expected late Tuesday morning into Tuesday afternoon. Prolonged periods of moderate to heavy rain will produce significant river rises with the potential for at least minor flooding in Juneau and Gustavus. Ponding of water in low-lying areas is also possible. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...The following areas, Central Inner Channels and Northern Inner Channels. This includes the city of Juneau. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, other low-lying areas and flood-prone locations. Low-water crossings may be flooded. Isolated landslides are possible in areas of steep terrain. * ADDITIONAL DETAILS... - Rain totals for the Juneau area between Monday morning and Tuesday evening range between 2-4 inches, with the highest totals along south and southwest facing mountain slopes. For areas of elevation greater than 1000 ft, rain totals may exceed 4 inches. Highest rain rates are expected overnight Monday into Tuesday with rain rates as high as 0.2 inches per hour.