When the rain falls, and the snow melts, ...

... all the water west of the Sierras has only one place to go:

From: BayAlerts
Subject: Storm Debris Affects Ferry Service

A message from HARBOR BAY/SAN FRANCISCO

Recent storms have washed an unprecedented amount of debris into the San Francisco Bay. On 4 occasions, debris has damaged vessel propellers, resulting in  delays and service cancelations. And, on numerous occasions, debris has been sucked into waterjet propulsion systems, requiring crews to clear the system before proceeding. We are doing our best to steer around major obstacles while adhering to published schedules. We thank you for your patience and understanding.