textproduct: San Diego

SYNOPSIS

Slight inland warming for today, then cooler for the weekend for inland areas with stronger onshore flow. The marine layer will deepen during the weekend with night and morning coastal low clouds extending well inland and onto the coastal slopes of the mountains. For Saturday afternoon into Sunday evening, southwest to west winds for the mountains and deserts will gust to 40 to 50 mph with isolated gusts to 65 mph. The coast and valleys will warm on Monday with the greater warming for inland areas for Tuesday through Thursday.

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

160400Z...Coast/Valleys...Low clouds based 2000-2500 ft MSL have quickly rushed into San Diego and Orange Counties this evening. Clouds will continue to march inland, covering the entire coastal basin by 09-12z Sat. Bases may lower some overnight, with minor vis reductions (3-5SM) expected for some elevated inland valleys near mountain foothills (60% chance). Patchy -DZ possible from 09-18Z. Slow clearing expected Sat AM with scattering occurring 17-20z for inland areas. Areas near the coastline may stay BKN through the afternoon (20-40% chance). Low clouds based 2000-3000 ft MSL will quickly move inland again Saturday evening, starting in San Diego County and moving northward overnight.

Mountains/Deserts...Elevated westerly wind gusts will continue through Saturday morning with 25-35 kt gusts widespread. Gusts locally to 45 kts along wind prone desert slopes and through mountain passes. MOD up/downdrafts and local LLWS in lee of mountains. Localized areas of BLDU and reduced vis. Winds strengthen further Saturday afternoon with gusts 35-45 kts widespread, locally to 60 kts in wind prone locations. Strong up/downdrafts in lee of mtns with BLDU and areas of BLDU and reduced vis expected. 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 7-10 feet with a 9-12 second period will generate choppy seas. Winds and seas will slowly diminish through the day Sunday.

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.