textproduct: Los Angeles

SYNOPSIS

29/235 AM.

Gradual cooling will continue through the week as will coastal flooding issues due to very high tides. The next storm system is expected to bring rain to the area from as early as Friday through Sunday, likely peaking Saturday evening into Sunday morning.

LONG TERM (MON-THU)

29/1255 PM.

For the extended, latest models are exhibiting good synoptic agreement through the period. At upper levels, ridge will develop over the area Monday/Tuesday then will shift eastward as a upper low sweeps northeastward across northern California on Wednesday and Thursday. At the surface, weak offshore flow will prevail on Monday/Tuesday with a return of weak onshore flow by Wednesday and Thursday.

Forecast-wise, the above synoptic pattern will result in benign weather for the area. With the ridge overhead and weak offshore pressure gradients, Monday and Tuesday will be dry and warmer with high temperatures topping out in the upper 60s and 70s. There will be some northeasterly winds, due to the offshore pressure gradients, but any winds are expected to remain below advisory levels.

For Wednesday and Thursday, a slight cooling trend can be expected with some increase in high clouds. With the upper low moving northeast into northern California, there will be a low chance (less than 20%) of some light showers across the Central Coast.

AVIATION

29/1723Z.

At 1530Z at KLAX, the marine layer was 5000 ft deep. The top of the inversion was at 6200 ft with a temperature of 10 C.

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

Moderate confidence in remaining TAFs. VFR CIGs mainly near 050 expected. 10-30% chc of -DZ and -SHRA. Highest for coastal sites and late tonight into tomorrow morning. CIGs may fall to 025-035 at times.

KLAX...Moderate confidence in TAF. VFR CIGs near 050 expected. 20-30% chc of -DZ or -SHRA late tonight thru end of fcst pd. CIGs may fall to near 030 during aforementioned timeframe. Any east wind component is expected to remain under 8 kt.

KBUR...Moderate confidence in TAF. VFR CIGs near 050 expected. 10-20% chc of -DZ or -SHRA late tonight thru end of fcst pd. CIGs may fall to near 030 during aforementioned timeframe. No wind issues expected.

MARINE

29/1219 PM.

Conditions are expected to remain below Small Craft Advisory (SCA) levels through Saturday. Southwest flow aloft will produce chances for drizzle and isolated light rain showers Today & Friday.

A storm system is expected to impact the coastal waters this weekend. However, guidance continues to shift to the south with some solutions showing the bulk of showers only as far north as the Channel islands. Regardless, there will be some gusty SCA NW winds behind the system on Sunday.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Coastal Flood Advisory in effect until 2 PM PDT Friday for zones 87-340-346-349-350-354-362-366. (See LAXCFWLOX). PZ...NONE.