textproduct: Los Angeles

SYNOPSIS

09/745 AM.

Temperatures will warm to the 80s and 90s through Monday. 100 degree readings may occur locally in the warmest valleys on Sunday and Monday. Coastal low clouds will develop each night through the weekend. Cooling will begin on Tuesday.

LONG TERM (TUE-FRI)

09/248 AM.

The upper high will pull further to the east on Tuesday and hgts will fall through the day. There will be a big increase in the onshore flow as well (~8 mb to the east and ~6 mb to the north). Look for plenty of morning low clouds pushing into the vlys with slow clearing. There may be some advisory level winds in the Antelope Vly as well. Max temps will plummet 5 to 10 locally 15 degrees. Look for 70s across the coasts and lower to mid 80s in the vlys.

Not the best mdl agreement for the Wed to Fri period as there is confusion on how to handle an upper low that will traverse the northern portion of the state sometime during the period. The forecast, however, will likely not vary too much with any of the solutions. There will likely be plenty of night through morning low clouds and fog. Cool both Wed and Thu and then a tad warmer Friday as onshore flow relaxes a little. Thursday will be the coolest day of the next 7 with max temps right near normal.

AVIATION

09/1735Z.

At 1625Z at KLAX, the marine layer was 1800 ft deep. The top of the inversion was at 3400 ft with a temperature of 21 C.

High confidence in VFR TAFs for desert airfields (KPMD & KWJF).

Moderate confidence in remaining TAFs. Timing of CIG/VSBY restrictions may be off +/- 3 hours and cig hgt by +/- 200 ft.

KLAX...Moderate confidence in TAF. MVFR CIGs around 015 should scatter 19-20Z Sat. 30% chance CIGs remain 20Z-02Z or at least periodic BKN conditions. Thereafter, CIGs expected lower to IFR 006 (+/- 200ft). Fair confidence in clearing time, but with 30% chance CIGs linger thru end of fcst pd. No significant east wind component expected.

KBUR...Moderate confidence in TAF. Arrival and clearing times of CIGs should be accurate within +/- 2 hours. Low clouds may be as low as OVC003.

MARINE

09/744 AM.

GALE Warnings go in effect this afternoon across the Outer Waters to the west and north of Point Conception. These conditions should last through the evening hours - may linger past midnight across PZZ670. Short period seas peaking 10 to 13 feet are expected through tonight. In addition, Strong Small Craft Advisory (SCA) winds are expected nearshore along the Central coast during this timeframe.

Winds and seas should diminish throughout the day on Sunday. By Monday, conditions should be much calmer and are expected to remain below advisory levels through Tuesday. From Wednesday through Friday, chances for SCA level winds will increase each day especially across the outer waters.

LOX WATCHES/WARNINGS/ADVISORIES

CA...NONE. PZ...Small Craft Advisory in effect from 2 PM this afternoon to 3 AM PDT Sunday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 2 PM PDT this afternoon for zones 670-673. (See LAXMWWLOX). Gale Warning in effect from 2 PM this afternoon to 9 PM PDT this evening for zones 670-673. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Sunday for zone 676. (See LAXMWWLOX).