30/230 AM.
Night through morning low clouds will continue across the coasts and valleys. Some very light drizzle is possible each morning. Temperatures will remain well below normal through the middle of the week. Temperatures will then begin to warm by Thursday, with many valley locations warming into the 90s again by early next week.
(tdy-Thu), 30/231 AM.
Cyclonic flow will continue over the state as a series of upper lows/trofs moves through the PACNW. At the same time moderate to strong onshore flow both to the N and E will continue through the 3 day period. Hgts will slowly rise through the period from 578 dam to 582 dam.
The marine layer is about 2500 ft deep as it has been lifted by the onshore flow and and cyclonic flow aloft. This deep marine layer has brought low clouds to most of the csts and vlys. There is some northerly flow across SBA county and this will keep portions of the SBA south coast clear. Some local drizzle is possible each morning esp near the foothills which will add a little extra lift. The marine layer is deep enough that there will be some reverse clearing as the stratus in the vlys bubbles up into a stratacu deck.
Coastal temps will not change much through the period but the interior temps will rise due to the increasing hgts. Max temps will remain blo normal everywhere through the period with cstl sites 3 to 6 degrees blo normal and the rest of the area around 5 to 10 degrees.
The strong onshore flow will produce near advisory level westerly wind gusts each afternoon across the western Antelope Vly and its foothills.
(Fri-Mon), 30/230 AM.
Friday will again start out gloomy with low clouds covering most of the csts and vlys. This due to the continued strong onshore flow and weak troffing aloft. The gradients relax just a skosh which should bring slightly better/faster clearing. At the upper levels hgts will rise about 4 dam as the upper trof weakens. Less onshore flow, earlier clearing and rising hgts will all mix together to bring 2 to 3 degrees of warming to most areas. The interior of SLO county will be the exception as warmer interior air will bring as much as 7 degrees of warming to that area.
Continued warming is on tap for Saturday as the troffing disappearsand an ill-defined weak flow pattern sets up with hgts up to 590 dam. Still quite a bit of onshore flow so there will be plenty of morning low clouds. Look for 1 to 3 degrees of warming across the csts and vlys, while the interior will warm 3 to 5 degrees.
Sunday will be very similar to Saturday both with respect to the synoptic pattern and the sensible weather.
On Monday Srn CA will be in between a weak ridge to the east and weak troffing to the NW. Hgts will remain near 590 dam. While there will still be mdt-stg onshore flow to the east the onshore push to north in the morning will be much weaker and possibly weakly offshore. This should reduce the amount of morning low clouds. Max temps may warm a degree or two as a result.
The onshore push to the east will generate gusty just under advisory level winds each afternoon.
30/0957z.
At 0835Z at KLAX, the marine layer was 2500 ft deep. The top of the inversion was 6000 ft with a temperature of 13 C.
High confidence in VFR TAFs for KPMD and KWJF.
There is a 20% chance for brief IFR cigs at KPRB. Moderate confidence for all other TAFs. VFR conds may arrive up to 90 minutes later than fcst. Cig hgts could be off by +/- 300 ft.
KLAX, Moderate confidence in TAF. VFR conds could arrive as late at 2130Z with a 30 percent chc of SCT conds. There is a 30 percent chc of BKN015 cigs 10Z-16Z. High confidence in any easterly wind staying under 6 knots.
KBUR, Moderate confidence in TAF. VFR conds could arrive as late as 20Z.
30/257 AM.
Small Craft Advisory (SCA) level winds/seas over the outer waters have ended. High confidence in conditions diminishing on Tuesday. SCA wind chances also decrease through the coming week, with a 30% chance of SCA gusts over the far western PZZ670.
Other than a 30% chance of SCA winds over the western Santa Barbara Channel each afternoon and evening through Tuesday, high confidence in conditions staying under SCA for the rest of the waters.
All waters will see short-period choppy seas through the period.
Ca, NONE. PZ, Small Craft Advisory in effect until 3 AM PDT early this morning for zones 670-673-676. (See LAXMWWLOX).
