Jessica C. McDonald, 21, disappeared in the waters near La Conner, Washington, on September 16, 1997. She and her husband were in a 20-foot Skagit Crab skiff that was overcome by rough weather and sank, forcing both into cold, turbulent water.

Her husband reached shore; Jessica did not and vanished during the swim toward land. The exact circumstances of her final moments are unclear. The Skagit County Sheriff’s Office investigated and the case remains open; she is presumed to have drowned and is listed in national missing persons databases.

Does anyone who was on the water that day or who remembers unusual conditions near La Conner on September 16, 1997, have information that could help?