FXUS66 KLOX 180935
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA 
235 AM PDT Mon May 18 2026

.SYNOPSIS...18/205 AM.

Warmer temperatures are expected this week with some locally 
breezy Santa Ana winds this morning. The warmest day will be 
Wednesday with slow cooling the rest of the week along with a 
return of night and morning low clouds and fog.

&&

.SHORT TERM (TDY-WED)...18/205 AM.

The marine layer is about 5000 ft deep and marine layer stratus
covers much of the csts and vlys of LA and VTA counties. The low
clouds should dissipate earlier than normal as the pressure grads
shift offshore. There will be a 10 mb offshore trend in the E/W
direction and this will help develop a Santa Ana wind event
despite not much in the way of actual offshore flow or upper
support. Most of the passes and canyons will have gusty NE winds
but the advisory level gusts will be confined to the mtns. Almost
all of the csts and vlys will see 4 to 8 degrees of warming today
with max temps across the csts and vlys in the 70s and lower 80s.

There will be weaker offshore flow on Tuesday but it will hinder
any attempt of the marine layer to reform with only the Long Beach
area vulnerable to morning low clouds. Any canyon winds that do
develop in the morning will be well under advisory criteria. The
warming trend will continue with 1 to 3 degrees of warming
expected across the csts; 3 to 6 degrees in he vlys and 5 to 8
further inland. The inland areas greater warming trend is due to
the lack of cool air advection that will occur today. The max
temps across the csts/vlys will be 4 to 8 degrees above normal.

Wednesday should be a sunny day with little or no marine layer
stratus in the morning. It will be the warmest day for the csts
and vlys as max temps there will warm another 1 to 3 degrees. Look
for mid 70s to lower 80s across the csts and 80s in the vlys.

.LONG TERM (THU-SUN)...18/205 AM.

Weak upper level flow will be atop of Srn CA for the xtnd period.
There will be few if any weather concerns during the period. At
the sfc there will be increasing onshore flow each day. By the
weekend there will be moderate to strong onshore flow. The marine
layer clouds will also increase in coverage and duration every
day. By the weekend there will be a strong enough onshore push to
the W that will generate gusty near advisory level gusts in the
western Antelope Vly and foothills. The increase in onshore flow
and marine layer coupled with slowly falling hgts will bring about
a 4 day cooling trend. Friday will have the most noticeable 
cooling of 4 to 6 degrees. By Sunday max temps will be in the mid 
60s to mid 70s across the csts and upper 70s and lower 80s in the 
vlys. These max temps are 1 to 3 degrees blo normal.

&&

.AVIATION...18/0903Z.

At 0835Z at KLAX, the marine layer was 5000 ft deep. The top of 
the inversion was at 6300 ft with a temperature of 11 C. 

Good confidence in TAFs for KPRB, KSBP, KSBA, KCMA, KPMD and 
KWJF.

Moderate confidence in the remainder of the TAFs as VFR conds
could come as early as 12Z depending on the strength of the Santa
Ana winds.

KLAX...Moderate confidence in TAF. Cigs will vary between 025 and
040. SCT conds could arrive as early as 14Z. There is a 30 percent
chc of an 8 kt east wind component 11Z to 15Z.

KBUR...Moderate confidence in TAF. Cigs will vary between 025 and
040. SCT conds could arrive as early as 14Z.

&&

.MARINE...18/204 AM.

For the Outer Waters, high confidence in current forecast. 
Tonight through tonight, high confidence in combination of Small 
Craft Advisory (SCA) level winds and seas. For Tuesday through 
Friday, winds and seas are expected to remain below SCA levels.

For the Inner Waters north of Point Sal, high confidence in
current forecast. For this morning, high confidencein a 
combinations of SCA level winds and seas. From this afternoon 
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. Through Friday, winds and seas are expected to 
remain below SCA levels.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory remains in effect from 7 AM this morning to 3
      PM PDT this afternoon for zone 88. (See LAXNPWLOX).
     High Surf Advisory in effect until 9 AM PDT this morning for
      zones 340-346-354. (See LAXCFWLOX).
     Beach Hazards Statement in effect until 9 AM PDT this morning
      for zones 349-350-362-366. (See LAXCFWLOX).
     Wind Advisory remains in effect until 3 PM PDT this afternoon
      for zones 375>380. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 9 AM PDT this morning
      for zone 645. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PDT early this
      morning for zone 650. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PDT Tuesday for
      zone 670. (See LAXMWWLOX).
     Small Craft Advisory in effect until 9 PM PDT this evening
      for zones 673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...Rorke
AVIATION...Rorke
MARINE...RAT
SYNOPSIS...LP/MW

weather.gov/losangeles

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