The National Weather Service issued and then extended a dense fog advisory on Thursday for parts of the Bay Area, including the San Francisco bayshore, the North Bay and the Salinas Valley, as developing high pressure in the area this week helped usher in the weather phenomenon.
The heavy fog is expected to last through at least Thursday morning and resulted in low visibility for much of the region at the start of the morning commute. The San Francisco bayshore fog advisory was expected to expire at 9 a.m., but low cloud cover could remain.
“Mid- to high level cloud cover streams over the Bay Area and Central Coast, below which low stratus and fog is developing in the wake of the widespread light rainfall from the last couple of days,” the National Weather Service said in its forecast discussion for Thursday…