textproduct: Los Angeles

SYNOPSIS

20/858 AM.

Temperatures will remain well above normal through next week, though some cooling is expected today and through this weekend. Areas of dense coastal fog will be possible through the weekend as well. Temperatures will trend upward again next week but are not expected to be as hot as this week.

LONG TERM (MON-THU)

20/300 AM.

The east PAC upper high reasserts itself Monday and persisted into Wednesday before braking down on Thursday. Hgts will mostly be around 588 dam through Wed. The good news is that there will continuous onshore flow from the west through the period. There will be some offshore flow from the north in the mornings but the east push will help limit the warming, esp near the coast. Mdls do keep the marine layer clouds away through the period but would not be surprised if there were ocnl bouts of morning stratus and dense fog. Look for 2 to 3 degrees of warming Monday and 1 to 2 additional degrees on Tuesday. Max temps will then change little on Wednesday. Max temps will be 15 to 22 degrees above normal and there may be a need for heat advisories for some of the csts and vlys. During this time max temps will mostly be in the 80s across the csts and in the 90s in the vlys.

There will be some, but not much cooling on Thursday.

Both AI mdls do not show any chc of rain through the end of the month. Both mdls do, however, show rain at the beginning of the month - esp the GFS-AI.

AVIATION

20/1510Z.

At 1500Z at KLAX, there was a surface-based inversion. The top of the inversion was 2400 feet with a temperature of 28 degrees Celsius.

For 18Z TAF package, high confidence in KPRB, KBUR. KVNY, KPMD and KWJF. For coastal sites, high confidence in forecasts through this evening, but low confidence tonight in development/timing of CIG/VSBY restrictions.

KLAX...Overall, moderate confidence in 18Z TAF. Through this evening, high confidence in CAVU conditions. For tonight and Saturday morning, moderate confidence in development of LIFR/VLIFR conditions, but low confidence in timing (could be +/- 3 hours of current forecasts). No significant easterly wind component is expected.

KBUR...High confidence in 18Z TAF as CAVU conditions are expected through the period.

MARINE

20/810 AM.

For the Outer Waters, moderate to high confidence in current forecast. Through Saturday morning, high confidence in winds and seas remaining below Small Craft Advisory (SCA) levels. From Saturday afternoon through Tuesday, high confidence in a combination of SCA level winds and seas. Additionally, there is a 20-30% chance of GALE FORCE winds Saturday and Saturday night.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecast. Through tonight, high confidence in winds and seas remaining below SCA levels. From Saturday through Sunday, high confidence in SCA level winds in the afternoon and evening hours. For Monday through Tuesday, there is a 40-50% chance of SCA level winds in the afternoon and evening hours.

For the Inner Waters south of Point Conception, high confidence in current forecast. Winds and seas are expected to remain below SCA levels through Tuesday.

For tonight and into Saturday morning, areas of dense fog are likely across all of the coastal waters.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Heat Advisory remains in effect until 8 PM PDT this evening for zones 38-87-340-341-343-344-346>350-354-355-362-366-367-549-550. (See LAXNPWLOX). Heat Advisory in effect until 8 PM PDT this evening for zones 38-87-343-344. (See LAXNPWLOX). Extreme Heat Warning in effect until 8 PM PDT this evening for zones 88-342-345-351>353-356>358-368>376-378>380-548. (See LAXNPWLOX). PZ...Small Craft Advisory in effect from 2 PM Saturday to 3 AM PDT Sunday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 2 PM Saturday to 3 AM PDT Monday for zones 670-673. (See LAXMWWLOX). Small Craft Advisory in effect from 5 PM Saturday to 3 AM PDT Monday for zone 676. (See LAXMWWLOX).