Slow warming will continue for the inland areas through mid week with high temperatures around 4 to 8 degrees above average for Wednesday and Thursday. The coast and valleys will cool a few degrees on Tuesday, then warm a few degrees for Wednesday and Thursday with night and morning coastal low clouds spreading into portions of the valleys late each night. A low pressure system moving into the western states will bring a cooling trend for Friday through next weekend with high temperatures for next Sunday falling to a few degrees below average to around 5 degrees below average for the valleys.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
New Aviation and Marine Discussion,
(today through Wednesday), Not much change in high temperatures is expected for today with high temperatures a few degrees above average. High temperatures for today will range from the mid to upper 60s near the coast to the 80s for the Inland Empire with 100 to 104 for the lower deserts.
Deepening of the marine layer will bring a few degrees of cooling for the coast and valleys on Tuesday with most areas a few to around 5 degrees warmer on Wednesday. Wednesday high temperatures will be a few degrees above average for the coast and valleys with the deserts and lower elevations of the mountains 5 to locally 10 degrees above average. High temperatures on Wednesday will range from the lower 70s near the coast to the mid 80s to lower 90s for the Inland Empire with 102 to 106 for the lower deserts.
A marine layer near 2000 feet deep early this morning will deepen to around 2500 feet for late tonight into Tuesday morning, then begin to decrease for Tuesday night into Wednesday morning. Night and morning coastal low clouds will spread into the western valleys for early this morning, into portions of the inland valleys for late tonight into Tuesday morning, then into the western valleys for late Tuesday night into Wednesday morning.
(Thursday through Sunday), For Friday through Sunday, a low pressure system will move toward and slowly inland into the western states bring stronger onshore flow, deepening of the marine layer, and cooling for southern California.
Not much change is expected on Thursday, followed by a gradual cooling trend for Friday through Sunday. High temperatures on Thursday of a few degrees above average for coastal areas to 4 to 8 degrees above average for inland areas will cool on Sunday to a few degrees below average to around 5 degrees below average for the valleys. High temperatures for next Sunday will range from the around 70 near the coast to the upper 70s to mid 80s for the Inland Empire with the upper 90s for the lower deserts.
Night and morning coastal low clouds will spread into the western valleys for early Thursday, into portions of the inland valleys for early Friday, and across much of the valleys for early Saturday and early Sunday.
011730z, Coast/Valleys, Low clouds have cleared the Inland Empire and are making a quick retreat out of the valleys and clearing to the coast. Low clouds based 1500-2000 ft MSL will hang out over the coastal waters with a few low clouds wafting in over coastal areas at times. Low clouds with bases 1000-2000 ft MSL will begin to push back in after 23Z along the coast and further inland into OC and SD after 03-04Z Tuesday and into the Inland Empire after 6-10Z.
Mountains/Deserts, Mostly clear skies and VFR conditions expected through the period.
No hazardous marine conditions are expected through Saturday.
Ca, None. PZ, None.
