Patchy low clouds and fog near the coast will clear during the morning with strengthening east winds along and below the coastal slopes of the mountains for late tonight until around noon on Thursday with gusts to 45 mph and isolated gusts to 55 mph. Mid and high cloud will spread into the area from the southeast for Thursday into Friday with a slight chance of showers for the mountains late Thursday night and early Friday. There will be drying and warming for the weekend, then cooler for next Monday.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
(today through Thursday), Patchy low clouds and fog over the coastal waters have spread locally inland along portions of the San Diego inland to around the mesas and inland into portions of the Orange County coastal plain. Visibilities have been lowest near the mesas and other higher coastal terrain.
For Wednesday, high pressure aloft will be over northern and central California and Nevada with upper level low pressure centered off the coast of central Baja with stronger easterly flow aloft over southern California. On Thursday, the upper high will move to the east and the upper low to the northwest with the flow aloft over southern California becoming stronger southeasterly.
Offshore lower-level flow across southern California will strengthen. East to northeast winds will strengthen along and below the coastal slopes of the mountain for late tonight into Wednesday. The winds will become more easterly on Wednesday night and diminish around noon on Thursday. Winds will gust to around 45 mph with isolated stronger gusts to around 55 mph, mainly for the eastern Inland Empire below the Banning Pass and in the San Diego County mountains.
High temperatures today will warm 5 to 10 degrees for the coast and valleys with another 4 to 8 degrees of warming for coastal areas on Wednesday. High temperatures for most areas will cool around 5 degrees on Thursday as mid and high level clouds spread over the area from the southeast.
(Thursday night through Monday), Low pressure off the northern Baja coast will draw mid and high level moisture into the area from the southeast with a slight chance of showers for the mountains late Thursday night into early Friday.
High temperatures will cool 4 to 8 degrees for the coast and valleys on Friday with not much change for most areas on Saturday. High temperatures for most areas will warm a few to around 5 degrees on Sunday, then cool by around the same amount on Monday. With the warming, high temperatures on Sunday will be around 5 degrees above average for coastal areas and 5 to 10 degrees above average for the valleys, mountains, and deserts. High temperatures on Sunday will range from around 70 near the coast to the 70s for the valleys with the lower deserts in the lower 80s.
031030z, Coast, Areas of low clouds and fog will increase in coverage through 14Z, before scattering out by 16Z. Cloud bases will be 400-700 feet MSL, with vis 3-6SM, but locally 0-2SM on coastal mesas. Otherwise, mostly clear and VFR conditions today and tonight.
No hazardous marine conditions are expected through Saturday.
Surf of 3 to 6 feet with sets to 7 feet in San Diego County will combine with a higher than average tide this morning to potentially generate minor tidal overflow and coastal flooding. Check the Coastal Hazard Message for details.
Ca, Coastal Flood Advisory until 10 AM PST this morning for San Diego County Coastal Areas.
Wind Advisory from 4 AM Wednesday to noon PST Thursday for Orange County Inland Areas-Riverside County Mountains-San Bernardino County Mountains-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Mountains- San Diego County Valleys-San Gorgonio Pass near Banning- Santa Ana Mountains and Foothills.
PZ, Coastal Flood Advisory until 10 AM PST this morning for Coastal Waters from San Mateo Point to the Mexican Border and out to 10 nm.
