A LARGE WEST-NORTHWEST SWELL WITH A LONG PERIOD WILL CONTINUE TOBUILD AND PERSIST THROUGH FRIDAY IN ORANGE COUNTY AND THROUGH SATURDAY IN SAN DIEGO COUNTY. THIS SWELL WILL PRODUCE HIGH SURF AND STRONG RIP CURRENTS, LEADING TO HAZARDOUS SWIMMING CONDITIONS. SWELL AND SURF WILL GRADUALLY SUBSIDE OVER THE WEEKEND. * SURF...6-10 FEET, WITH SETS TO 12 FEET IN SOUTHERN SAN DIEGO COUNTY.

* TIMING...SURF WILL BUILD THROUGH THURSDAY, PEAK THURSDAY NIGHT AND FRIDAY, THEN SUBSIDE ON SATURDAY.

* IMPACTS...INCREASED RISK OF DROWNING DUE TO ELEVATED SURF AND STRONG RIP CURRENTS. SNEAKER WAVES AND OTHER HAZARDS CAN CREATE LIFE-THREATENING CONDITIONS IN THE SURF ZONE. MINOR COASTAL FLOODING DURING MORNING HIGH TIDES AND MINOR BEACH EROSION ARE POSSIBLE.