textproduct: Los Angeles

SYNOPSIS

25/117 AM.

May Gray low clouds and fog will be widespread across the coasts and valleys each night through morning period through at least Tuesday. Some cooling is expected over the next couple days, with well below normal temperatures Tuesday through Thursday. Additionally, areas of gusty afternoon and evening winds are expected, strongest on Tuesday or Wednesday.

LONG TERM (THU-SUN)

25/115 AM.

The low pressure system may remain parked in the region into Thursday with additional rotating spokes of moisture and energy around the weakening system retaining at least a small chance of showers across the region, perhaps focused across San Luis Obispo and Santa Barbara Counties.

Friday through Sunday temperatures will trend upwards as the low travels to the east, becoming within a few degrees of normal over the weekend (highs in the low 70s to low 80s for coast and valleys). Moderate strength onshore surface pressure gradients will continue, thus some coverage of marine layer stratus is likely each night and morning, and breezy onshore afternoon to evening winds will continue for the Antelope Valley and likely return in the form of Sundowner winds for southwest Santa Barbara County.

AVIATION

25/1156Z.

At 0800Z at KLAX, a weak marine layer was 1500 feet deep. The top of the inversion was at 5000 feet with a temperature of 16 degrees Celsius.

High confidence in KWJF and KPMD. For all other sites, low confidence in forecast with a 20-40 percent chance of MVFR cigs/vsbys occuring where not forecast and 20-40 percent chance of not occuring where forecast.

KLAX...Low confidence in TAF. There is a 30 percent chance of MVFR/IFR cigs 13Z to 18Z. No significant easterly wind component is expected.

KBUR...Low confidence in TAF. There is a 10 percent chance of at least brief MVFR/IFR cigs/vsbys 13Z-17Z.

MARINE

25/808 AM.

For the Outer Waters, moderate to high confidence in current forecast. Through Monday morning, high confidence in winds and seas remaining below Small Craft Advisory (SCA) levels. Winds will increase to SCA levels Monday afternoon for the waters south of Point Sal to San Nicholas Island. By Tuesday afternoon, high confidence in winds and seas increasing to SCA levels across all outer waters through at least Wednesday night. There is a GALE WATCH for Tuesday afternoon through Tuesday night. Followed by SCA conditions through early Thursday. Thereafter, conditions are likely to fall below SCA levels for a short-time, before returning later Friday into the weekend.

For the Inner Waters north of Point Sal, moderate confidence in current forecast. Through Monday afternoon, high confidence in winds and seas remaining below SCA levels. There is a 30% chance of SCA level winds Monday afternoon and evening. For Tuesday through early Wednesday, high confidence in a combination of SCA level winds (strongest in the afternoon and evening hours) and seas. There is a 40% chance of SCA winds and seas Wednesday afternoon through evening. There is a GALE WATCH for Tuesday afternoon through Tuesday night. From late Wednesday night through Thursday night, conds should drop below SCA levels.

For the Inner Waters south of Point Conception, moderate confidence in current forecast. From this afternoon through tonight, SCA level W to NW winds are expected across the Santa Barbara Channel, around the Channel Islands, and into Santa Monica Channel during the evening hours. On Tuesday and Tuesday night, there is a 90% chance of SCA level winds across the Santa Barbara Channel with a 40-50% chance of Gale force winds. Local Gale Force winds could occur nearshore Anacapa island during this timeframe. SCA level winds could linger into Wednesday especially across the channel. Otherwise, expecting conditions to fall below SCA levels thereafter.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory remains in effect from 2 PM to 10 PM PDT Tuesday for zones 340-341. (See LAXNPWLOX). High Surf Advisory in effect from 5 PM Tuesday to 11 PM PDT Wednesday for zones 340-346. (See LAXCFWLOX). Wind Advisory remains in effect from 6 PM Tuesday to 6 AM PDT Wednesday for zones 349-351. (See LAXNPWLOX). Wind Advisory remains in effect from 11 AM Tuesday to midnight PDT Tuesday night for zones 381-383. (See LAXNPWLOX). PZ...Small Craft Advisory in effect from 8 AM to 4 PM PDT Tuesday for zones 645-670. (See LAXMWWLOX). Gale Watch in effect from Tuesday afternoon through late Tuesday night for zones 645-650-670-673-676. (See LAXMWWLOX). Small Craft Advisory in effect from 2 PM this afternoon to 1 AM PDT Tuesday for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 9 PM PDT this evening for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect from 2 PM this afternoon to 4 PM PDT Tuesday for zones 673-676. (See LAXMWWLOX).