Areas of dense fog with visibility 1 NM or less is persisting in
the waters off San Diego County. This fog may erode some along the
immediate coast over the next several hours. Conditions should
improve with fog lifting/clearing by late morning, but some areas
of fog could linger into the afternoon, especially for the
nearshore waters. Fog is possible again Thursday evening into
Friday morning, but should be patchier than this morning.
Mariners should be prepared for sudden drops in visibility.
Reduce speeds and be on the lookout for other vessels. Use radar
or GPS navigation if available, and consider remaining in harbor
if such equipment is unavailable.