Brief warming trend expected through Friday, with cooler conditions over the weekend, and additional warming next week. Gusty westerly winds over the mountains and into the deserts this weekend. Night and morning low clouds and fog will be present each day through the forecast period along the coast and into portions of the valleys at times.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
Brief warming trend for inland locations today and Friday. High resolution guidance is indicating a coastal eddy will be present Friday through Sunday which should push marine layer low clouds into the coastal basin each night morning this weekend. The eddy may also prevent low clouds from completely clearing the coast or push clearing to later in the afternoon. Patchy drizzle may develop, most likely on Saturday as a trough of low pressure passes to our north.
As the aforementioned trough digs south into the Pacific Northwest and Great Basin, winds will increase over the mountains and deserts. Gusty winds will develop late Saturday morning and continue into Sunday, weakening by late Sunday night. Winds will be strongest on the east facing mountain slopes, through passes, and into the deserts. Peak gusts will be mostly 40-60 mph, with local gusts to 65 mph possible in wind prone locations. Additionally temperatures will fall a few degrees, becoming slightly below normal for most locations.
Temperatures are expected to warm for early to mid-next week. Most ensemble clusters indicate a ridge of high pressure in the vicinity of the US West Coast by Monday with variations in placement. A more easterly position (putting the ridge over California) would lead to a warmer solution with a more westerly position (keeping the ridge over the Eastern Pacific) would keep temperatures more moderate.
141700z, Coast/Valleys, Low clouds are currently clearing toward the coastline with SKC expected for all land areas after 19z. Low clouds based 1500-2000 ft MSL return to San Diego County coastal areas 00-03z Fri and slowly spread north filling most of the coastal basin overnight. 60-70% chance for cigs to reach KONT and 50-60% at KSBD. Low clouds clear to the coast again 16-19z Fri.
Mountains/Deserts, Westerly wind gusts 25-40 kt increasing again after 21Z. MOD up/downdrafts and local LLWS in lee of mountains. Winds slowly weaken tonight into Friday morning. Otherwise, SKC expected through the period.
No hazardous marine conditions are expected through Saturday morning. Winds are expected to reach 20-30 kts over outer coastal waters from late Saturday into early Sunday. Strongest gusts near San Clemente Island. This will generate hazardous conditions for small craft with choppy seas reaching 8-11 feet through Sunday morning.
Ca, 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, None.
