Juneau City and Borough officials on Saturday advised residents in all known avalanche slide paths to evacuate after an atmospheric-river event brought warm rain, heavy runoff and multiple avalanches.

Ryan O'Shaughnessy, CBJ emergency programs manager, said the city issued an evacuation advisory shortly before 11 a.m. the previous day for "all known slide paths" and that teams are monitoring observed avalanches in Slide Pass, Mount Juneau and Thane. "We are continually monitoring those slide paths," Ryan said, adding that resources have been staged to respond if avalanches impact developed areas.

John Broussette, CBJ avalanche adviser, said a temporary lull overnight helped "lock things up," but forecasted renewed rain and rising freezing levels would likely increase avalanche activity. "Hazard is still high, and we don't feel comfortable putting people back into their homes underneath those paths at this point," Broussette said.

The Alaska Department of Transportation reported automated detections of recent avalanche activity near Thane Road. Pat Dreyer of DOT said an infrasound detection system recorded "between 8 and 10 unique avalanche events" near the roadway since the closure, and DOT plans drone reconnaissance with CBJ before lifting closures.

Officials said CBJ does not yet have the same detection system statewide and is using visual inspections, drone overflights and partnership resources to assess what has released and what could still slide. "We are going to do some reconnaissance of the upper start zones today to get a better determining factor on what has gone and what still has a capability of producing a large slide," Broussette said.

The advisory is non‑regulatory guidance intended to protect life safety; officials repeatedly urged residents not to enter slide paths and cautioned that on-scene personnel will deny access to hazardous zones until avalanche experts deem them safe.

The city asked residents to follow CBJ evacuation maps for slide-path boundaries and to use the city's reporting channels to share observations. Ashley Heimbinger, the city's communications and engagement director, directed people with hazards to email emergencyresponse@Juno.gov and said the city will update guidance if conditions change.

Next steps: CBJ and DOT plan drone reconnaissance, aerial and field assessments and continued coordination with the National Weather Service; officials said they will revise closure and shelter plans as conditions evolve.