By late Friday morning, the coastal cities of Half Moon Bay and Pacifica had large waves hitting shore.
A county office warned residents that the possibility of flooding is higher than usual for the first storm of the season and to take appropriate precautions as the storms continue through the weekend.
San Mateo County residents can sign up for emergency city alerts here.
Whether you already had a fieldtrip to the pumpkin patches planned or were a surfer just trying to catch a good wave, here are some of the views from the day.
Pacifica State Beach (October 14, 2016) - Spherical Image - RICOH THETA
