textproduct: San Diego

SYNOPSIS

Cool and windy this weekend with chances of light precipitation, mainly over and west of the mountains. Warmer early next week, then minor cooling and a slight chance of precipitation towards the middle of the week. Warmer and drier for the end of the week.

DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE

SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

Evening update... Scattered showers continue to move across the area this evening as an upper level short wave begins to move inland over So Cal. Rainfall rates will generally be 0.10" per hour or less tonight, locally up to 0.25" per hour in heavier showers. So far totals have beeen less than 0.10" for the coastal areas to the mountains, except on the coastal slopes of the San Bernardino Mountains where around 0.25-0.50" have been reported. Otherwise gusty southwest to west winds continue tonight in the mountains and deserts with gusts of 45-55 mph. A Wind Advisory remains in effect for the deserts through 11 AM Sunday.

A brief lull in the precipitation occurs Sunday afternoon before a second short waves moves in Sunday night, bringing another round of isolated to scattered showers into Monday morning. The greatest coverage will be across San Diego County with this wave. Snow levels near 6500-7000 ft this evening will fall to 5500-6000 ft by Sunday morning. 1-3" of snow accumulation is possible above 6500 ft. Sunday will remain cool wih high temperatures anywhere from 10 to 20 degrees below normal inland.

Previous discussion... Cool and breezy conditions will continue for Monday and Tuesday with little if any chance for precipitation after Monday morning. Temperatures on Monday will remain well below average but Tuesday will be warmer, with temperatures near average.

Another low pressure system could bring chances for precip again for late Wed into Thu as another low pressure system moves in from the west. The timing and trajectory of this system is still uncertain due to spread among model solutions but most likely, we will see more cool and cloudy weather.

Dry and warmer weather returns for the end of next week as the low moves inland and weak high pressure ridging develops over the west coast.

AVIATION

260000Z...Multiple cloud decks, SCT-BKN 2500-5000ft for coastal and inland areas and SCT-OVC 20,000-25,000ft MSL across the entire region. VCSH is beginning to spread into the coastal areas this evening with more widespread -SHRA expected to fill over the next few hours. Light rain is also now reaching the mountains with intermittent SHSN above 6500-7000 ft MSL. Mtns shrouded in FG; vis 0- 5SM in FG/SHSN. Periodic wind gusts above 20kts to continue at most sites this evening, stronger winds possible overnight and into Sunday morning, especially for desert sites and those near mtn ranges where surface gusts may reach 30-35kts. Through mtn passes, up to 50kts. Mod to strong up/downdrafts near peaks and on desert slopes today and Sunday. Periodic reduced VIS due to BLDU. -SHRA will come to an end north to south on Sunday, around 09-12z Sun for Orange, Riverside, San Bernardino counties and 16-19z Sun for San Diego County.

MARINE

Gusty west winds close to 18-20 kts expected intermittently through late Sunday morning which may be hazardous to small craft. Otherwise, no hazardous marine conditions are expected through Wednesday.

SKYWARN

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

SGX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory until 11 AM PDT Sunday for Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning.

PZ...None.