381
FXUS66 KLOX 311026
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
326 AM PDT Fri Jul 31 2026

.SYNOPSIS...31/249 AM.

Temperatures will become dangerously hot in many areas Friday
through this weekend, as the next heat wave arrives. Some cooling
is expected next week, though temperatures will remain above
normal. Dangerous surf conditions are expected at area beaches
this week into this weekend, as a result of swells from a distant
tropical cyclone located west of Mexico.

&&

.SHORT TERM (TDY-SUN)...31/325 AM.

Today and tomorrow are expected to be the hottest days in this
heat wave as 500mb heights approach a rarely seen 600dam. If there
is any good news in this scenario is that onshore gradients are
expected to remain at least lightly onshore, allowing at least a
light seabreeze to bring in some cooling ocean air inland by
afternoon. Also a positive is that monsoon moisture is not
expected to be a factor so it won`t feel quite as sticky as last
weekend. But even with those factors, temperatures will still be
dangerously hot, especially away from the immediate coast, with
highs 5-10 degrees above normal. It`s highly recommended that any
outdoor activities be completed before 9 and or after 7pm. And
always have a source of hydration. And keep in mind, since sea
surface temperatures are in the 70s south of Pt Conception,
overnight lows will continue to much warmer than normal, mostly
in the mid 60s to mid 70s. Saturday will be peak heat day in most
areas with highs around 107 in the western San Fernando Valley,
mid 90s downtown, and mid 80s to low 90s in the intermediate areas
between the coast and the valleys.

Winds will mostly be under 15 mph, except some evening Sundowner
winds across southwest Santa Barbara County up to 35 mph and up to
30 mph in the desert.

A large south swell from Tropical Cyclone Genevieve will further
enhance large wave and potentially deadly rip currents for some
area beaches.

.LONG TERM (MON-THU)...31/324 AM.

The slow cooling trend will continue into next week, though
temperatures will still be 3-6 degrees above normal. In addition,
monsoon moisture is expected to return next week which will limit
overnight cooling and keep humidities higher than normal.
Therefore, heat hazards may continue into next week.

&&

.AVIATION...31/0239Z.

At 0036Z at KLAX, the marine layer was 900 feet deep. The top of
the inversion was 2900 feet with a temp of 28 degrees Celsius.

High confidence in VFR TAFs for KPRB, KBUR, KVNY, KPMD, KWJF. 10%
chance for VLIFR-LIFR conds at KBUR/KVNY 10Z-16Z.

Low confidence in TAFs for KSBP and KSMX. 30% chance for VFR conds
to prevail, but if cigs arrive, 40% chance for VLIFR conds also due
to dense fog.

Moderate confidence in remaining TAFs, higher for LA County
sites. Timing of flight cat changes may be off +/- 2 hours and
flight cats may be off by 1 cat, but good confidence in low clouds
overnight.

KLAX...Moderate confidence in TAF. Timing of flight cat changes
may be off +/- 2 hours from TAF, and lowest cigs may be off +/-
200 feet. No significant east wind component expected.

KBUR...High confidence in VFR TAF. There is a 10% chance for
VLIFR to LIFR conds 10Z-16Z.

&&

.MARINE...30/727 PM.

For the Outer Waters, Small Craft Advisory (SCA) winds and seas
will occur through the remainder of this week into this weekend,
before subsiding early next week. Winds will generally peak at
around 30 knots but occasional gusts to 35 knots will be possible,
mainly during the evening hours.

For the Inner Waters north of Point Sal, there is an 80% chance
for SCA winds each afternoon and evening through Saturday. For
the Inner Waters south of Point Conception, there is a 40% chance
of SCA winds each afternoon and evening through this weekend over
the western one-third of the Santa Barbara Channel.

Seas of 8-12 feet will impact the outer waters into this weekend,
due to a long-period southerly swell from a distant tropical
cyclone, combining with shorter-period northwesterly swell/wind-
waves caused by the moderate to locally strong NW winds. As a
result, steep, hazardous seas will be common, especially over the
outer waters, extending to nearshore waters off the Central
Coast.

&&

.BEACHES...30/728 PM.

Distant Tropical Cyclone Genevieve is generating long period S-SE
swells that will affect the beaches for the remainder of this
week into this weekend. A High Surf Advisory is in effect for the
south facing beaches of LA and Ventura Counties through Saturday
afternoon. Very strong, severe rip currents have been reported
from some area beaches, with a risk of strong long-shore currents
and sneaker waves. Use extra caution if you are at the beach, and
be sure to ask lifeguards if and where it is safe to swim.

Please reference the Coastal Hazard Message for details
on High Surf and Coastal Flood Advisories, as well as Beach
Hazards Statements. Dangerous rip currents will be of particular
concern this weekend.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Extreme Heat Warning in effect from 10 AM this morning to 8
      PM PDT Sunday for zones
      38-88-343>345-351>353-355>358-368>376-378-379-548. (See LAXNPWLOX).
     Coastal Flood Advisory in effect until 3 AM PDT Saturday for
      zones 87-354-362-366. (See LAXCFWLOX).
     High Surf Advisory in effect until 5 PM PDT Saturday for
      zones 87-354-362-366. (See LAXCFWLOX).
     Beach Hazards Statement in effect through Saturday afternoon
      for zones 340-346-349-350-356. (See LAXCFWLOX).
     Heat Advisory in effect from 10 AM this morning to 8 PM PDT
      Sunday for zones 341-342-347>350-354-362-366-367-377. (See LAXNPWLOX).
     Heat Advisory in effect until 10 AM PDT this morning for
      zones 378-379. (See LAXNPWLOX).
     Heat Advisory in effect until 8 PM PDT Sunday for zone 380. (See LAXNPWLOX).
     Extreme Heat Warning in effect until 8 PM PDT Sunday for
      zones 381>383. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect from 3 PM this afternoon to 3
      AM PDT Saturday for zone 645. (See LAXMWWLOX).
     Small Craft Advisory in effect until 5 AM PDT Monday for
      zones 670-673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...MW
AVIATION...Lund
MARINE...Ciliberti
BEACHES...Cohen/Lewis/Ciliberti
SYNOPSIS...Cohen/MW/CC

weather.gov/losangeles

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