704
FXUS66 KLOX 310303
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
803 PM PDT Thu Jul 30 2026

.SYNOPSIS...30/729 PM.

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 (THU-SUN)...30/802 PM.

***UPDATE***

It was a sunny day today with high temperatures in the 70s at the
beaches, 80s to high 90s away from the coast, and low 100s in the
warmest valleys/locations. Marine layer clouds have already
started pushing into the Ventura and L.A. County Coasts, and are
expected to expand into the remainder of the coasts through the
night. Temperatures will increase by a few degrees tomorrow thanks
to increasing 500 mb heights and decreasing onshore flow, bringing
temperatures up to 6 to 12 degrees above normal for this time of
year. Widespread Extreme Heat Warnings and Heat Advisories are in
effect starting tomorrow/Friday morning into Sunday evening.

As for winds, North to Northwest Sundowner winds with local gusts
to 45 mph are possible across Southwest Santa Barbara County this
evening, but will likely be a little bit stronger with a 40%
chance of an advisory needed tomorrow/Friday evening.

Besides some changes to the sky coverage for this evening, the
forecast looks to be in shape and no other updates were needed
this evening.

***From Previous Discussion***

Overall the forecast remains largely unchanged as high pressure
is expected to push in from the east over the next few days. The
influence of the marine layer will continue decreasing through the
remainder of this week, as high pressure builds over the next
couple days. There may, however, be some areas of dense morning
fog near the coast Friday morning. After that it will be all about
the heat as a nearly 600dam high moves over the area. Valleys and
interior areas will see highs well over 100 Friday and Saturday
while intermediate areas between the coast and the valleys
(including Downtown LA) will be in the upper 80s to mid 90s.
Current forecast highs are mostly within a degree or two of daily
records with Saturday having the the highest chance for that. In
addition to the traditional daytime heat threat, overnight lows
will remain well above normal in response to the very warm ocean
temperatures, so there won`t be as much relief at night as we are
accustomed to.

A slow cooling trend will begin on Sunday, however temperatures
will remain above normal and be hazardous. Also of note, gusty
Sundowner winds may bring local gusts to advisory levels across
southwest Santa Barbara County this weekend -- 40% chance.

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)...30/229 PM.

The slow cooling trend will continue into next week, though
temperatures will still be 5-10 degrees above normal and
increasing moisture aloft will limit overnight cooling and keep
humidities higher than normal. And in addition, high pressure
aloft will continue to dominate the weather pattern along the West
Coast all of next week, meaning highs will remain above normal
for the foreseeable future. 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 Friday 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 Friday 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 Friday 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 until 3 AM PDT Friday for zone
      645. (See LAXMWWLOX).
     Small Craft Advisory in effect until 5 AM PDT Monday for
      zones 670-673-676. (See LAXMWWLOX).

&&

$$

PUBLIC...MW/JLD/Cohen/KL
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