Event planning
If you are in San Francisco on Sunday, plan routes that avoid the Bay to Breakers course and use BART/early special trains where available; expect crowded stations and modified Muni service.
SFist reports extensive street closures, rolling course shutdowns and significant Muni disruptions for Bay to Breakers (May 17), with extra BART/Caltrain service but likely crowding.
Weather precautions
Reconsider coastal plans for Friday–Saturday and avoid exposed shoreline spots during the gale watch; secure loose items and expect rough sea conditions.
Regional coverage indicates some of the windiest conditions of the year are expected over the weekend with a gale watch in effect for San Francisco Bay.