17/740 PM.
Slight warming and a shrinking marine layer are expected Friday into the weekend. Temperatures will cool by a few degrees Sunday and Monday, then another gradual warming trend is likely through at least the middle of next week.
(tdy-Sun), 18/142 AM.
Fairly benign conditions expected through the weekend. No hazard products expected. Warmest on Saturday, pushing close to 90s for some valley locations especially Salinas and Antelope Valleys. Marine layer stratus may return to portions of the LA Basin on Sat, and more likely on Sunday. There is potential of AM clouds reaching into San Gabriel/San Fernando Valleys on Sunday.
(Mon-Thu), 18/214 AM.
A small trough moves into the area late Sunday into Monday. Interestingly enough, this feature is mostly expected to move eastward following the upper level flow, but a weaker portion is expected to split and become stationary, centering itself over the inner coastal waters by mid-week. This puts LA/VTA counties in a relatively favorable position for the influx of moisture and instability. However, confidence is low if these parameters along with lift will be sufficient enough for even a slight mention of showers and thunderstorms across the area. Details at this time are blurry, but the weak signal is strongest across typically favored mountain areas this time of year. Temperatures will warm some across the area, and humidity will increase some over the LA Basin.
18/1745z.
At 1700Z at KLAX, the marine layer was 3700 ft deep. The top of the inversion was at 5100 ft with a temperature of 16 C.
High confidence in VFR TAFs for KPRB, KBUR, KVNY, KPMD & KWJF.
For the remainder of the airfields, timing of CIG and any VSBY restrictions may be off +/- 2 hrs and flight minimums by one category.
KLAX, Moderate confidence in TAF. Return and dissipation of MVFR CIGs 015 (+/- 300 ft) tonight and Sat morning should be accurate within +/- 2 hrs of fcst. No significant east wind component expected.
KBUR, Generally hi confidence in TAF. No wind issues expected.
18/847 AM.
Generally high confidence in widespread Small Craft Advisory (SCA) northwest winds across the outer waters and nearshore waters along the Central Coast at least through Sunday and possibly into Monday. Choppy, short period seas will develop.
Across the Santa Barbara Channel, there is a 30-40% chance of SCA winds this afternoon and evening, then a 40-60% chance Saturday and Sunday in the afternoon/evening hours. A 30%-40% chance of these winds will linger afternoon/evening hours Monday as well. Local gusts near 20 knot will be common each afternoon and evening through the San Pedro Channel and Santa Monica Bay.
Ca, NONE. PZ, Small Craft Advisory in effect from 3 PM this afternoon to 9 PM PDT this evening for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Sunday for zones 670-673-676. (See LAXMWWLOX).
