Costa Mesa, CA Severe Weather Alertstar_ratehome

...DENSE FOG TO AFFECT THE NEARSHORE WATERS SOUTH OF POINT
CONCEPTION THROUGH FRIDAY MORNING...

A shallow marine layer will bring areas of dense fog to much of
the nearshore coastal waters south of Point Conception later
tonight through Friday morning.

Mariners should be prepared for abrupt visibility changes down to
one nautical mile or less. Reduce speeds and be on the lookout for
exposed rocks and other vessels, including large ships in the
shipping lanes. Use radar or GPS navigation if available, and
consider remaining in harbor if such equipment is unavailable.