textproduct: Los Angeles

SYNOPSIS

27/821 AM.

Marine layer stratus with patchy fog will reoccur each night through late next week. Temperatures will very gradually cool over the next few days before stabilizing. Expect below normal temperatures through late next week, trending toward normal by next weekend. Winds will remain elevated throughout the period across the Antelope Valley and Foothills, but winds will remain fairly mild elsewhere.

LONG TERM (TUE-FRI)

27/338 AM.

Broad upper level troughing and seasonably healthy onshore flow will keep temperatures well below normal through at least Thursday. Expecting an expansive marine layer in depth and areal extent. This is especially the case starting Tuesday as the Sundowner winds weaken, which should allow the low clouds to expand over all coastal areas. Most computer projections and ensemble solutions favor upper level ridging to form starting Friday or Saturday of next week, which should bring some warming and decrease in the marine layer. There is a rather large envelope in the ensemble suites however as to the magnitude of that change. So look for a warming trend as we head into the 250th July 4th weekend, but stay tuned as to how much warming to plan for.

AVIATION

27/1026Z.

At 10Z at KLAX, the marine layer was 2500 ft deep. The top of the inversion was at 5000 feet with a temperature of 18 Celsius.

High confidence in VFR TAFs for KPMD KWJF with abnormally strong and persistent onshore winds. Possible UDDF near mountains.

High confidence in ceilings at all other airports. Moderate confidence in timing (+/- 3 hours) and flight categories (+/- 1 category.

KLAX...High confidence in ceilings and flight categories. Moderate confidence in timing (+/- 3 hours). High confidence in any east wind component staying under 8 knots.

KBUR...High confidence in ceilings and flight categories. Moderate confidence in timing (+/- 3 hours).

MARINE

27/812 AM.

High confidence in Small Craft Advisory (SCA) level winds for the outer waters from the Central Coast through San Nicolas Island through Sunday or Monday, with some improvement after. Local Gale force wind gusts will be possible during the late afternoon/early evening hours through Sunday. The nearshore waters will likely see SCA winds each afternoon and evening.

High confidence in SCA winds over the western Santa Barbara Channel late this afternoon and evening, with lowering chances to follow. The rest of the waters will likely stay under SCA, except for localized winds approaching 25 knots in the afternoon and evening hours today.

All waters will see short-period choppy seas into early next week, with today likely being the worst. Seas across the outer waters will near SCA levels Sunday into Monday evening.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory remains in effect from 5 PM this afternoon to 6 AM PDT Sunday for zones 349-351. (See LAXNPWLOX). Wind Advisory remains in effect until 5 AM PDT Sunday for zones 381-383. (See LAXNPWLOX). PZ...Small Craft Advisory in effect until 3 AM PDT Sunday for zones 645-650. (See LAXMWWLOX). Small Craft Advisory in effect until 9 AM PDT Monday for zones 670-673-676. (See LAXMWWLOX).