textproduct: Los Angeles

SYNOPSIS

08/227 AM.

It will be a little warmer today. Cooler conditions arrive Thursday followed by a chance of rain and thunderstorms Friday and over the weekend.

LONG TERM (SAT-TUE)

08/227 AM.

The weekend will be cloudy, cool and showery. Friday night's trof will exit the area Saturday morning. Hot on its heels, however, will be an even colder (534 dam) upper low that will sweep into the area and transverse the state by late Sunday. This cold, dynamic and unstable system will bring showers and a chc of TSTMs to the area. On average this system will produce about a half inch of rain over the 2 day period. Rainfall amounts, however, will likely not be too homogeneous due to the convective nature of the system. Some area may only see a quarter inch of rain, while others could see an inch or more. Most rainfall rates will be between 0.25 to 0.75 in/hr but higher rates will be possible under any TSTM that develops. Snow levels will fall to about 6000 ft and several inches of snow is possible above that elevation. Max temps both days will only be in the 60s or 4 to 8 locally 10 degrees blo normal.

There is some chc of lingering showers Sunday night, but by Monday dry NW flow will set up over the area. Both Monday and Tuesday will have mostly clear skies with rebounding temperatures (2 to 4 degrees Mon and 3 to 6 degrees Tuesday).

AVIATION

08/0928Z.

At 0822Z at KLAX, the marine layer was 900 ft deep. The top of the inversion was at 2300 ft with a temperature of 20 C.

High confidence in VFR TAFs, except for KOXR (30 percent chc of IFR cigs 13Z-17Z) and KSMO, KLAX, & KLGB (20 percent chc of no low clouds, timing could be off +/- 1 hour cig hgt by +/- 200 ft)

KLAX...Moderate confidence in TAF. There is a 20 percent chc that there will be no cigs. If cigs do arrive they could arrive as late as 13Z and as low as BKN003. No significant east wind component expected.

KBUR...High confidence in VFR TAF.

MARINE

07/1130 PM.

Current Small Craft Advisories (SCA) look on track. SCA winds will continue across all Outer Waters through the evening and overnight hours. Local Gale force gusts (35 kts) are likely this evening through the overnight hours south of Point Conception.

Gale force winds are possible south of Point Conception, especially near the Channel Islands this afternoon and evening. GALE Watches are in effect from this afternoon to early morning Thursday for the waters near the Channel Islands down south to San Nicolas Island (PZZ676) and for the Santa Barbara Channel (PZZ650). Gusty SCA level winds are also possible for the inner waters south of Point Mugu today, focused on western and northern portions.

A storm system with showers and thunderstorms is expected to move over the coastal waters Thursday night and will last into the weekend.

LOX WATCHES/WARNINGS/ADVISORIES

CA...NONE. PZ...Small Craft Advisory in effect until 3 AM PDT early this morning for zones 645-650. (See LAXMWWLOX). Gale Watch in effect from this afternoon through late tonight for zones 650-676. (See LAXMWWLOX). Small Craft Advisory in effect from 6 PM this evening to 3 AM PDT Thursday for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect until 11 PM PDT this evening for zone 670. (See LAXMWWLOX). Small Craft Advisory in effect until 11 AM PDT Thursday for zone 673. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT this afternoon for zone 676. (See LAXMWWLOX).