One product issued by NWS for:
Small Craft Advisory
URGENT - Marine Weather Message National Weather Service San Francisco Bay Area 919 PM PDT Thu Aug 22 2019 PZZ540-231230- /O.CON.KMTR.SC.Y.0168.000000T0000Z-190823T1600Z/ Point Arena To Point Reyes To 10 nm- 919 PM PDT Thu Aug 22 2019 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT FRIDAY... * WINDS...Northwest 10 to 20 kt with gusts up to 30 kt. * SEAS...6 to 9 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 21 to 33 knots and/or steep waves are expected to produce hazardous wave conditions to small craft. Inexperienced mariners...especially those operating smaller vessels should avoid navigating in these conditions. && $$