The mountains and deserts will continue to cool today while the valleys begin to warm. Slight warming for Thursday and Friday followed by greater inland cooling for the weekend. Then warmer early next week with high temperatures for Tuesday of next week 5 to 10 degrees above average for inland areas. Low clouds will cover much of the coastal waters and the coast and valleys this morning, then not spread as far into the valleys for Thursday and Friday.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
(Wednesday through Friday), The marine layer has deepened to around 3000 feet with widespread low clouds over the coastal water extending inland across most of the coast and valleys. Cloud bases near the coast have increased enough that the more likely location for any patchy drizzle this morning should be in portions of the valleys. The marine layer is expected to become gradually shallower for Thursday and Friday with low clouds spreading into portions of the inland valleys for early Thursday and into the western valleys for early Friday.
High temperatures for the mountains and deserts will cool today while the valleys may begin to warm. This will be followed by inland warming for Thursday and Friday. High temperatures on Friday will range from around average near the coast to 5 to 10 degrees average for the deserts. High temperatures on Friday will range from the mid to upper 60s near the coast to the upper 70s to upper 80s for Inland Empire with the upper 90s to 104 for the lower deserts.
(Saturday through Tuesday), Stronger onshore flow for the weekend will spread cooling inland. The greater cooling is expected on Sunday with high temperatures around 5 degrees cooler for the deserts, mountains, and inland valleys. There will be warming for early next week with high temperatures for inland areas around 5 to 10 degrees above average on Tuesday, around 100 for the lower deserts.
130930z, Coast/Valleys, Low clouds with bases 1600-3000 feet and tops to 4000 feet MSL will continue to fill the coastal basin this morning. Vis reduced in hills and in coastal -DZ through 17Z. Scatter out 16-19Z, but incomplete or intermittent clearing along the coast. Low clouds to push ashore and inland after 01Z vcnty KSAN and after 07Z vcnty KSNA. They should fill the coastal basin again by early Thursday with bases 1000-1800 feet MSL.
Mountains/Deserts, Clearing skies this morning, but SCT clouds around 10000 feet MSL over mountains 18-00Z. Westerly wind gusts 25- 40 kt after 20Z, strongest through mountain gaps. These could lead to MOD up/downdrafts and local LLWS in lee of mountains.
No hazardous marine conditions are expected through Saturday morning. Increasing winds and seas could become hazardous for small craft Saturday afternoon through Sunday.
Ca, None. PZ, None.
