textproduct: Los Angeles

SYNOPSIS

08/231 AM.

A significant southerly swell will bring hazardous surf conditions to the beaches through at least Tuesday. Isolated showers will continue at times through Tuesday. The combination of increasing heat and humidity across the area will cause moderate to major impacts, focused over the coasts and valleys Tuesday through at least Thursday.

LONG TERM (FRI-MON)

08/231 AM.

Hgts should fall to about 592 dam on Friday while at the same time onshore flow increases both to the N and E. This should lead to 3 to 6 degrees of cooling for almost all of the area. PWATs fall as well but will still be above normal. If all of this comes to fruition there will be no need for any heat products. There is, however, a 20 percent chc that this cooling may be slower to develop and there will be a need for one more day of heat headlines.

The ridge flattens out over the weekend and onshore flow continues. Look for 3 to 6 degrees of cooling on Saturday which should bring most temps to a few degrees blo normal. Sunday's temps will be similar to Saturdays. PWATs should drop down to normal as well.

Onshore flow weakens some on Monday and this should lead to 1 or 2 degrees of warming.

AVIATION

08/1147Z.

At 0832Z at KLAX, there was no marine layer. A surface inversion had a top near 1800 feet, with a temperature of 27 degrees C.

Low to moderate confidence in the Central Coast sites. There is a 40 percent chc of no dense fog at KSMX and a 40 percent chc of LIFR conds at KSBP through 16Z.

Good confidence in no low clouds for the rest of the sites.

There is a slight chance of showers and thunderstorms for all areas from 15Z to 00Z.

KLAX...Good confidence in TAF. There is a slight chance of -SHRA and a non-zero chance of -TSRA 15Z-00Z. Any showers could produce locally gusty winds and brief moderate to heavy rain. No significant east wind component expected.

KBUR...Good confidence in TAF. There is a slight chance of -SHRA and a non-zero chance of -TSRA 15Z-00Z. Any showers could produce locally gusty winds and brief moderate to heavy rain.

MARINE

08/823 AM.

There will be a slight chance of thunderstorms over portions of the waters through today, with a cluster of storms currently moving to the northeast through the waters south of the Santa Barbara Channel. Smaller yet nonzero chances exist Wednesday.

Good confidence in winds and seas increasing to Small Craft Advisory (SCA) levels this afternoon focused south and west of Point Sal, with moderate confidence in winds increasing across all Outer Waters by Wednesday at the earliest. Winds and at times seas will likely exceed SCA levels into early next week.

Across the nearshore waters along the Central Coast, winds will locally reach SCA levels today and tomorrow, with more expansive gusty winds Thursday into early next week, with SCAs likely to be issued.

South of Point Conception, moderate confidence in SCA winds across the western half of the Santa Barbara Channel (locally eastern portions) each afternoon and evening into early next week. Thus, there is a 40-60% chance for SCAs to be issued each day, with highest chances today and again this weekend. Local SCA gusts will be possible each afternoon-evening across the Santa Monica Bay and San Pedro Channel into early next week with highest chances today.

The southerly swell that has impacted the coastal waters over the last few days will continue to gradually subside through tonight and tomorrow.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Heat Advisory in effect from 10 AM Wednesday to 8 PM PDT Thursday for zones 38-88-340>358-374-375. (See LAXNPWLOX). Coastal Flood Advisory in effect until 11 PM PDT this evening for zones 87-354-362-366. (See LAXCFWLOX). High Surf Advisory in effect until 11 PM PDT this evening for zones 87-354-362-366. (See LAXCFWLOX). Beach Hazards Statement in effect through this evening for zones 340-346-349-350. (See LAXCFWLOX). Heat Advisory in effect until 8 PM PDT Thursday for zones 362-366>373-548. (See LAXNPWLOX). PZ...Small Craft Advisory in effect from 3 PM this afternoon to 9 PM PDT this evening for zone 650. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM this afternoon to 9 AM PDT Wednesday for zones 673-676. (See LAXMWWLOX).