textproduct: Los Angeles

SYNOPSIS

09/1226 AM.

A warming trend will continue into early next week. Temperatures will warm to the 80s and 90s over the weekend through Tuesday. 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

09/0957Z.

At 0835Z at KLAX, the marine layer was 1400 ft deep. The top of the inversion was at 3500 ft with a temperature of 20 C.

High confidence in VFR TAFs for KPMD & KWJF.

Moderate confidence in remaining TAFs. Timing of CIG/VSBY restrictions may be off +/- 2 hours and cig hgt by +/- 200 ft.

KLAX...Moderate confidence in TAF. Cigs may vary between OVC008-011. SCT conds may be as late as 20Z. Good confidence that any east wind component will be AOB 6kt.

KBUR...Moderate confidence in TAF. Low clouds may be as low as OVC003. Arrival time may be as early as 10Z. VFR transitions may be as late as 17Z.

MARINE

09/258 AM.

SCA level NW winds are expected to strengthen through this afternoon/evening for the outer waters. Winds will likely reach GALE Force locally across the far northern waters this evening. There is a 40-60% chance of GALES this afternoon and evening over the northern two zones, near and NW of Point Conception. For the southern outer zone PZZ676, SCA winds are likely through early Sunday morning.

For the nearshore waters, SCA level winds are likely during the afternoon and evening hours through Sunday, especially along the Central Coast and to a lesser extent near the Channel islands.

Short period seas will build during this timeframe especially across the outer waters - peaking 10 to 13 ft through tonight.

Winds and seas should diminish throughout the day on Sunday. By Monday, conditions should be much calmer and likely below SCA levels.

LOX WATCHES/WARNINGS/ADVISORIES

CA...NONE. PZ...Small Craft Advisory in effect until 3 AM PDT early this morning for zone 645. (See LAXMWWLOX). 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).