25/211 AM.
Dry and occasionally breezy conditions are expected through the coming week. A cooling trend will start today with temperatures closer to normal by Thursday. Night through morning low clouds and fog will grow more extensive through Friday. A chance of rain will develop late next weekend.
(tdy-Thu), 25/309 AM.
Good onshore trends to the north and falling hgts have brought marine layer clouds to most of the beaches south of Pt Conception. The push to the N is also bring low clouds around the Pt and into western SBA county. Current Satellite trends show the low clouds pulling away from the LA county beaches south of Malibu so those areas may see only patchy low clouds. Skies otherwise will be mostly sunny. Onshore flow will increase through the day both to the north and east. This could well delay clearing until late morning (or even early afternoon for the VTA county beaches). The combination of marine layer and onshore flow will bring 3 to 6 locally 8 degrees of cooling to the csts and vlys. There will be much less cooling across the interior. Despite the cooling max temps in the vlys will still be 10 to 15 degrees above normal and the interior 15 to 18 degrees over normal. Sites in the Antelope Vly may see record heat again today.
Troffing and stronger onshore flow develops on Wednesday. There will be an extensive morning marine layer with slow clearing possibly lasting into the afternoon. Some drizzle is also possible right around dawn each morning. Hgts will fall to 574 dam. Max temps will fall 4 to 8 degrees across the coasts and 8 to 12 degrees over the vlys. The interior will not cool much and will remain 8 to 12 degrees above normal while the csts/vlys will be 2 to 4 degrees under normals.
Not much change on Thursday. An upper low will approach the Nrn CA coast and it will fling enough mid level clouds over Srn Ca to call the skies partly cloudy. Moderate onshore flow and a deep marine layer with plenty of morning stratus will bring more cooling to the area with the greatest cooling over the deserts.
(Fri-Mon), 25/308 AM.
Friday will look much like Thursday with just a little more cooling. Max temps will end up 3 to 6 degrees below normal everywhere.
A little pop up ridge moves over the area on Saturday. The onshore flow to the east weakens and offshore flow from the north will develop. This will lead to less morning low clouds esp across Srn SBA county and a quicker burnoff. Max temps will not change much and will remain blo normal.
A system will move into Nrn CA Sun through Mon morning. It will push a weak front through the area. Rain is likely for SLO county but the chc of rain quickly diminishes south of SLO county with only a 15 to 20 percent chc of rain across LA county. Both days will be cloudy with max temps mostly in the 60s across the csts and vlys.
25/1130z.
At 0712Z at KLAX, the marine layer depth was around 900 feet and the inversion top was at 2400 feet with a temperature of 24 C.
High confidence in deserts and valley sites. Low to moderate confidence in coastal sites, where timing of flight category changes may be off by +/-3 hours. Skies will struggle to clear today, and there is a 20% chance of little-to-no clearing through the period for KLAX, KSMO, and KOXR. Vv001-Vv002 cigs and/or VSBY as low as 1/4-1/2SM are possible at any sites where cigs do form, and conditions may frequently bounce between categories. There is a 15% chance that no cigs for at KSMX and KSBP.
KLAX, Moderate confidence in TAF. Timing of flight category changes may be off by +/-3 hours, especially clearing today. There is a 20% chance of little-to-no clearing today. Vv001-Vv002 cigs and/or VSBY as low as 1/4-1/2SM are possible through around 18Z Tue. No significant east wind component expected.
KBUR, High confidence in TAF.
25/305 AM.
For the Outer waters, conditions are expected to remain below Small Craft Advisory (SCA) criteria through Wednesday. Wednesday night there is a 30% chance of SCA winds around the Channel Islands (PZZ673/676). Large seas are expected Thursday through Saturday, peaking at 15-18 feet. There is a 50% chance of widespread SCA level NW winds during this time as well.
For the Inner Waters along the Central Coast, high confidence in conditions remaining below SCA criteria through Wednesday. Then Thursday through Saturday, SCA seas are likely (60-70% chance).
For the Inner Waters south of Point Conception, high confidence in relatively benign conditions through Wednesday. There is a 40-50% chance of SCA level winds Wednesday afternoon/evening for the Santa Barbara Channel. Higher confidence in SCA level seas late Thursday through Saturday.
Patchy dense fog with low visibilities will impact portions of the coastal waters through this morning.
Ca, NONE. PZ, NONE.
