High temperatures will warm to above average for today and Saturday, cool to below average for Sunday through Tuesday, then warm to above average again for Wednesday and Thursday of next week. Night and morning coastal low clouds will spread into portions of the valleys early today and early Sunday, then farther into the valleys for Sunday through early next week. Southwest to west winds for the mountains and deserts will be strongest on Sunday afternoon and evening with gusts to 35 to 45 mph with isolated gusts to 60 mph. There is also a slight chance for mostly light showers at times for late Sunday night through Tuesday afternoon from the coast to the mountains.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
(today through Sunday), Weak high pressure aloft will bring several degrees of warming today with high temperatures as much as 5 to 10 degrees warmer for the valleys and lower coastal slopes of the mountains. High temperatures for Saturday will remain 5 to 10 degrees above average with high temperatures ranging from around 70 near the coast to the 80s for the Inland Empire with the lower deserts in the mid to upper 90s. Night and morning coastal low clouds and fog will spread into portions of the inland valleys early this morning, then only into portions of the western valleys for tonight into Saturday morning as the marine layer decreases in depth.
A low pressure system moving southward off the California coast on Sunday will spread cooling inland with high temperatures as much as 8 to 12 degrees cooler for the inland valleys and lower elevations of the mountains with high temperatures on Sunday ranging from the mid to upper 60s near the coast to the 70s for the Inland Empire with the lower deserts in the upper 80s to mid 90s. Southwest to west winds for the mountains and deserts for Sunday afternoon and evening will gust to 35 to 45 mph with isolated gusts to 60 mph.
(Sunday night through Thursday), A low pressure system will move slowly inland through central and southern California on Monday and Tuesday. High temperatures will continue to cool on Monday, as much as another 8 to 12 degrees cooler for the mountains and deserts, with not much change on Tuesday. High temperatures for Monday and Tuesday will be around 10 degrees below average for inland areas to as much as 12 to 18 degrees below average for the mountains. High temperatures on Monday and Tuesday will be mostly in the mid 60s to around 70 for the coast and valleys with the lower deserts in the mid 70s to lower 80s. There is also a slight chance of mostly light showers at times for Sunday night through Tuesday afternoon.
High pressure over California will bring much warmer weather for Wednesday and Thursday with Thursday high temperatures 5 to 10 degrees above average for inland areas, similar to those of today and Saturday. High temperatures for Thursday of next week will range from around 70 near the coast to the 80s for the Inland Empire with the mid to upper 90s for the lower deserts.
010915z. Coast/Valleys, Areas of low clouds with bases 1500-2500 ft MSL have reached inland areas up to mountain foothills, continuing to expand through the coastal basin (including much of the Inland Empire). Maximum cloud coverage 12-15z before scattering out to coastal areas by 18z and mostly scattering out at the coast by 20z (areas of SCT-BKN clouds could linger in parts through the afternoon). Low clouds with lower bases, 1000-2000 ft MSL, redevelop after 02z, slowly filling into SD County and Orange County inland valleys through 09z Sat before starting to reach into western parts of the Inland Empire, lowering vis 2-6SM. Vis also reduced where clouds meet terrain.
.Mountains/Deserts, Areas of elevated westerly winds 20-30 kts, with gusts to 35 kts through mountain passes and into adjacent deserts Friday evening, weakening after 07z Sat. Areas of up/downdrafts and isolated LLWS in lee of mountains. Otherwise, VFR conditions will prevail through Fri.
Moderate onshore flow this afternoon and evening with gusts approaching 20 kts near San Clemente Island. No hazardous marine conditions are expected through Tuesday.
Ca, None. PZ, None.
