Marine Weather and Tide Forecast for San Diego, CA

DISCUSSION
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

.SHORT TERM (Today through Sunday)...
High temperatures increase slightly today for inland and desert areas while mountain and coastal temperatures remain similar to yesterday. The marine layer will make its move back in over the coast and into the coastal basin late this afternoon to settle in for the evening through tomorrow morning. The marine layer is expected to deepen for Saturday morning bringing chances for patchy drizzle for the coastal mountain slopes all the way to the coast.

Winds will increase Saturday afternoon as onshore flow strengthens over the area. Expect periods of gusty southwest to westerly winds through late Sunday. Highest wind speeds will be in the deserts, desert mountain slopes and mountain passes with gusts up to 40-50 mph, locally up to 65 mph. Daily high temperatures begin to cool area wide over the weekend with temperatures Sunday near to a few degrees below average.

.LONG TERM (Monday through Thursday)...
Temperatures begin to warm along the coast and in the Valleys Monday, then area wide Tuesday. Daily highs will continue to increase through the week, peaking Thursday afternoon. Temperatures Thursday will be up to 5 degrees warmer than average over most of the area. The high deserts will see temperatures 5-10 degrees above average.

AVIATION
151800Z
Coast/Valleys
Low confidence in complete clearing at the immediate coast this afternoon, any lingering clouds will have bases 2000-3000 ft. Low clouds will push back inland after 01Z Sat and fill in the coastal basin. Bases will be 1500-2500 ft MSL, with the most likely places for the bases to fall below 2000 ft are at KCRQ and near mtn foothills (70 percent). Chances of visibility falling below 3SM is around 70 percent near mountain foothills. Patchy -DZ possible from 09-18Z. Slow clearing expected Sat AM with SCT conditions most likely after 18Z for most locations.

Mountains/Deserts...Elevated westerly wind gusts 25-40 kt after 21z today with MOD up/downdrafts and local LLWS in lee of mountains.
Localized areas of BLDU and reduced VIS. Winds will remain gusty through much of Saturday. Otherwise, SKC and VFR expected through the period.

MARINE
Gusty westerly winds with gusts 20-30 kt will develop in the outer coastal waters late Saturday afternoon. The strongest gusts will occur near San Clemente Island. Seas of 8-11 feet with a 9-12 second period will generate choppy seas. Winds and seas will diminish through the day Sunday.

BEACHES
A westerly swell from 290 degrees with a 9 to 10 second period will bring elevated surf of 4 to 6 feet, sets to 7 feet for Saturday afternoon through Monday morning. Highest surf at west to northwest facing beaches. The combination of elevated surf and high tides of 6.5 to 7 feet will result in minor tidal overflow, especially for beach parking lots and boardwalks. Surf will start to decrease Monday afternoon.

SKYWARN
Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.



SGX WATCHES/WARNINGS/ADVISORIES
CA...Beach Hazards Statement from Saturday evening through Monday morning for Orange County Coastal Areas-San Diego County Coastal Areas.

Wind Advisory from 11 AM Saturday to 11 PM PDT Sunday for Apple and Lucerne Valleys-San Bernardino County Mountains.

Wind Advisory from 2 PM Saturday to 11 PM PDT Sunday for Riverside County Mountains-San Diego County Deserts-San Diego County Mountains-San Gorgonio Pass near Banning.

PZ...Small Craft Advisory from 3 PM Saturday to 7 AM PDT Sunday for Waters from San Mateo Point to the Mexican Border Extending 10 to 60 nm out including San Clemente Island.