Not as hot this weekend with breezy conditions across the mountains and deserts. Temperatures will hold near average for the first half of the week as a troughing pattern lingers with a deeper marine layer. High pressure moves in by Wednesday into the latter half of next week, bringing a warming trend.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
An area of low pressure is moving into western Washington State today, bringing an open wave troughing pattern along the West Coast. This continues to bring greater onshore flow and subtle cooling to the region today with high temperatures a few degrees cooler than yesterday. The marine inversion is still strong, where low clouds will see intermittent clearing. Breezy west and south winds will occur over the desert slopes/passes into the deserts through this evening. Models show gusts primarily near 25-40 MPH, locally near 55 MPH in the San Gorgonio Pass.
As the low pressure system in the Pacific NW moves inland, we will see a few more degrees of cooling for inland areas for Sunday and Monday as reinforcing shortwave moves through to the north. Most areas will be near average with some inland valley locations near 5 degrees below normal as low clouds move into the coastal and western valley areas each night and morning. Highs in the 70s and 80s will occur across most areas with highs 95-100 degrees across the lower deserts.
By Wednesday, the troughing pattern to the north will shift further inland as a ridge of high pressure amplifies off the coast. This will bring warmer weather on Wednesday, with similar temperatures expected for the rest of the week as the system remains off the coast. We will continue to monitor how warm we become, but so far, NBM predictions has high temperatures around 5 to locally 10 degrees above normal for this time period.
070000z, Coast/Valleys, Low clouds 1800-2300 ft MSL are developing along the San Diego coastline, pushing into Orange County after 02z this evening, covering the valleys by 05z, and developing in the Inland Empire 06-10z. VIS 0-5SM in highest inland valleys and along mountain foothills. Scatter out inland to the coast 15-18z with some lingering BKN cigs at the immediate coast through 20z. Morning HZ and VIS 4-6SM in the morning hours after sunrise in the Inland Empire. Otherwise, VFR conditions prevail through Sunday mid-afternoon.
Mountains/Deserts, VFR with clouds AOA 20000ft MSL through this evening. Southwest-west winds 20-35 knots this evening slowly decrease after 03z. MOD up/downdrafts and pockets of LLWS in lee (north and east) of mountains.
No hazardous marine conditions are expected through Wednesday night.
A series of long period (17-19 second) swells from the south (200 degrees) will result in elevated surf this weekend. Surf 4-6 feet at south facing beaches remains through this evening, before swell and surf diminishes slightly on Sunday. Surf builds again Monday as a fresh 3-4 foot swell at 18-19 seconds moves into the region. Surf peaks Tues-Wed with sets to 5-8 feet likely at south-facing beaches, then gradually diminishes late next week.
Ca, None. PZ, None.
