textproduct: Los Angeles

SYNOPSIS

15/1138 PM.

Night through morning low clouds and fog will persist through the week. Afternoon temperatures will be near normal today and Wednesday but sharp cooling is forecast for Thursday and Friday with a more persistent marine layer. Warmer conditions are likely next week.

LONG TERM (FRI-MON)

16/250 AM.

Friday and Saturday are set to be peak June Gloom days. Broad troffing moves into and over the state and will provide the gentle lift needed for a deep marine layer. At the sfc there will be stg onshore flow esp to the east. Low clouds and fog should cover the csts and all vlys and will likely xtnd into the mtn passes. The stg onshore push to the east will likely generate advisory level gusts across the western Antelope Vly. The low clouds will be slow to clear and early to return. Some, perhaps many, coastal locations will see little if any clearing. Max temps will only be in the mid and upper 60s across nearshore locations with only 70s across the rest of the csts/vlys. Most max temps will end up 5 to 10 degrees blo normal.

The trof will then start to diminish Sunday into Monday and the onshore flow will subside somewhat. This will lead to a lessening of the amount of morning low clouds, esp in areas like the Santa Clarita Vly, and an earlier and more complete afternoon burn off. Look for 1 to 2 degrees of warming on Sun and 2 to 3 degrees on Monday.

Looking further ahead into the middle of next week there are good indications of a strong upper high building into the area which would lead to well above normal temps for the vlys and inland areas (continued onshore flow will moderate the heat for the csts)

AVIATION

16/0953Z.

At 0832Z at KLAX, the marine layer was 1400 ft deep. The top of the inversion was near 2300 ft with a temperature of 23 C.

High confidence in KPMD & KWJF.

Fair confidence in TAF for KPRB with a 20 percent chc of no low clouds.

Moderate confidence in TAFs for KBUR and KVNY with 30 percent chc of IFR cig/vis 13Z-16Z.

Moderate confidence in remaining TAFs. Cigs may be off by +/- 300 ft and VFR transition could be 1 hour early or up to 2 hours late.

KLAX...Moderate confidence in TAF. There is a 30 percent chc that cigs will remain AOA 010. VFR conds could arrive as early as 17Z or as late a 20Z. No significant east wind component expected.

KBUR...Moderate confidence in TAF. There is a 30% chance for 2SM OVC006 conds 13Z-16Z.

MARINE

16/251 AM.

Moderate to high confidence in current forecast. Conditions are generally expected to remain below Small Craft Advisory (SCA) levels across the coastal waters through the forecast period. However, winds may approach SCA levels with gusts 20 to 25 knots over portions of the waters at times this afternoon near and south of Point Conception and into the western Santa Barbara Channel.

BEACHES

15/811 PM.

A couple of long period southerly swells (14 seconds and 18 seconds) will continue to affect the coastal waters through at least Wednesday. A Beach Hazard Statement is in effect through Wednesday evening due to elevated surf of 3 to 6 feet on south- facing beaches of Ventura County Beaches, Malibu Coast, Los Angeles County Beaches, and portions of the Southern Santa Barbara County Beaches.

Evening tides of 7.2 to 7.7 ft are predicted through Tuesday night. The combination of the unusually high tides with elevated surf could result in minor to locally moderate coastal flooding along south exposed coasts, especially near Malibu and Long Beach. In addition, there is along potential for sneaker waves. Stay tuned for updates and refer to CFWLOX for additional details.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Beach Hazards Statement in effect through late Wednesday night for zones 349-350-354-362-366. (See LAXCFWLOX). Coastal Flood Advisory in effect until 2 AM PDT Wednesday for zones 362-366. (See LAXCFWLOX). PZ...NONE.