FXUS66 KLOX 191613
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA 
913 AM PDT Tue May 19 2026

.SYNOPSIS...19/858 AM.

There will some warming today and Wednesday with lighter Santa
Ana winds. Beginning Thursday there will be a return to cooling
May Grey conditions which will last through the weekend.

&&

.SHORT TERM (TDY-THU)...19/913 AM.

***UPDATE***

Light offshore flow continues this morning with still some breezy
northeast winds, mainly in the LA mountains and the Santa 
Susanas. Gusts into the 30s are possible in those areas, but
outside of that winds are expected to be 25mph or less. Winds
shift around to west-southwest by afternoon in most areas except
the higher mountains where light northeast flow will continue into
Wednesday.

The warming trend will continue today with most areas warming up
by a few degrees over yesterday. Warmer valleys may touch 90 today
while intermediate areas away from the coast will be in the upper
70s to lower 80s.

***From Previous Discussion***

A return to onshore flow and a weak eddy will bring some low 
clouds to the coasts on Wednesday morning. Skies, otherwise, will 
be sunny. The gradients will be on the light side and there will 
be no wind issues. The coastal temps will not change much, but the
rest of the area will see a couple more degrees of warming. A few
90 degrees readings are possible in the warmest vly locations.

Continued onshore trends will bring moderate onshore flow to the
area on Thursday. The marine layer clouds will respond in kind and
most of the coasts and some of the lower vlys will wake up to low
clouds. The onshore flow will also delay clearing to the late
morning. There will be a little stronger seabreeze as well as a
return to gusty afternoon winds in the Antelope Vly. A multi day
cooling trend will kick off with max temps falling 1 to 3 degrees
across the csts/vlys (max temps may rise another degree or two
across the far interior)

.LONG TERM (FRI-MON)...19/1226 AM.

May Grey will return during the xtnd period. At the upper levels
there will be fairly weak flow. At the sfc there will be steadily
increasing onshore flow. By the weekend there will be moderate to
strong onshore flow. 

A more robust marine layer will likely develop each night through
morning. The clouds will push a little deeper into the vly each
day as well. By the weekend some beaches will struggle to clear. 
The increased onshore flow to the east will produce moderate 
southwest winds across the Antelope Valley and foothills during
the weekend.

Fridays will see the biggest drop in temps with most areas falling
by 4 to 6 degrees. A few more degrees of cooling are slated for
Saturday and then little change is forecast for Sunday and
Monday's temps. Highs over the weekend will range from the upper
60s to mid 70s across the csts with upper 70s to mid 80s for the
vlys. As is typical with strong onshore flow, the csts/vly temps
will be below normal while the interior temps will be a few
degrees over normal.

&&

.AVIATION...19/0903Z.

At 0840Z at KLAX, the marine layer was 1900 ft deep, with an 
inversion up to 3400 ft and a maximum temperature of 17 C. 

Very good confidence in CAVU TAFs.

KLAX...Good confidence in CAVU TAF. Any east wind component will 
be AOB 4 kt.

KBUR...Good confidence in TAF. Wind speeds may be off by up to 5 
kts and 30 degrees during peak winds.

&&

.MARINE...19/201 AM.

For the Outer Waters, high confidence in current forecast. Today 
through Friday, winds and seas are expected to remain below SCA 
levels, except for localized pockets of near SCA NW winds during 
the afternoons and evenings. 

For the Inner Waters north of Point Sal, high confidence in
current forecast. There is a 40 percent chance of SCA winds on 
Wednesay afternoon/evening. Otherwise through Friday, winds and 
seas are expected to remain below SCA levels. 

For the Inner Waters south of Point Conception, high confidence in
current forecast. Local SCA winds may occur again later today and
Wednesay evening off the coast of Point Dume, across the San 
Pedro Channel, and in the Santa Barbara Channel. Otherwise through
Friday, winds and seas are expected to remain below SCA levels.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.

&&

$$

PUBLIC...MW/Rorke
AVIATION...Rorke
MARINE...Black/Schoenfeld
SYNOPSIS...30

weather.gov/losangeles

Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox