702
FXUS66 KLOX 291414
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
714 AM PDT Thu Oct 29 2026

.SYNOPSIS...29/235 AM.

Gradual cooling will continue through the week as will coastal
flooding issues due to very high tides. The next storm system is
expected to bring rain to the area from as early as Friday
through Sunday, likely peaking Saturday evening into Sunday
morning.

&&

.SHORT TERM (TDY-SAT)...29/714 AM.

***UPDATE***

Latest satellite and surface observations indicate mostly cloudy
skies across the area with a mix of stratus and cirrus clouds.
Current sounding data indicates marine inversion in the 4000 to
4500 foot range. No significant winds are observed.

Forecast-wise for the immediate short term, no significant issues
are expected. Current cloudy conditions will likely improve to
partly cloudy levels this afternoon as stratus dissipates and high
clouds thin out. However, it will likely "cloud up" again this
evening. Given the cloud cover, temperatures will be a couple
degrees cooler than Wednesday.

Overall, current forecast has good handle on the immediate short
term. So, no significant updates are expected. For the afternoon
forecast suite, attention remains focused on our weekend storm. As
mentioned by the night shift below, it does seem to be trending on
the "drier" side of things. Will have to see what the 12Z model
runs think. Stay tuned.

***From Previous Discussion***

One, probably two, days of cloudy but benign weather on tap for
the area as the stage gets set for rain event. Today and Friday
the flow aloft will get stronger and stronger and will shift from
the WSW to the SW. Plenty of mid and high clouds will stream
overhead and skies will be mostly cloudy to overcast through the
period. On Friday a stray shower or two may develop just about
anywhere west and south of the mtns. Rainfall amounts, if any,
will be less than .05 inches. Max temps across the csts/vlys will
be in the 70s today falling to mostly the upper 60s to mid 70s on
Friday. These max temps are 5 to 10 degrees blo normal.

The upper low responsible for the SW flow will elongate down the
coast during the day Saturday and then sweep a trof or a weak cut
off low into and over Srn CA Saturday and overnight into Sunday.
Current blended mdl solutions are now showing a little more
northward progression of the moisture plume moving in the SW and
are showing likely pops (~70%) for most of the area including
points north of Pt Conception. Rain (unfortunately for Trick or
Treaters) will peak Saturday evening and continue overnight. Rain
will quickly taper off from the west to east Sunday morning and by
Sunday afternoon only eastern LA county will have a chc of rain.

There is still a wide range or rainfall solutions for this system.
this is not surprising as forecast mdls struggle with systems
coming in from the SW. The current official forecast indicates
that this system will not be a super soaker with the current high
chc of rain forecast only slated to produce a quarter to half inch
of rain over most areas (less than a quarter north of Pt
Conception and up to three quarters of an inch across SE LA
county. There is still a 30 percent chc of this being a 1 to 2
inch storm (south of Pt Conception) and a 10-15 percent chc of it
only producing a couple tenths.

All this said, these forecasts are based on longer range mdls
using spectral physics. This system is now coming into the
forecast window of the shorter range higher resolution sigma
physics based mdls and there is a noticeable forecast difference.
Both the NAM and the RRFS show a much later arrival time of the
rain and in the NAM`s case a much more southerly focused one. So
perhaps Saturday and Saturday evening will be drier than the
official forecast indicates.

Max temps for the csts and vlys will only be in the 60s on
Saturday, but will rise into the lower 70s Sunday due to clearing
skies in the afternoon.

.LONG TERM (SUN-WED)...29/235 AM.

Ridging and weak offshore flow move into the area on Monday and
continue into Tuesday. The offshore flow will not be too strong
and there will only be local sub advisory winds below the passes
and canyons. Max temps will rise 3 to 6 degrees Monday and an
additional 1 to 2 degrees Tuesday. Despite the warming max temps
will end up 2 to 3 degrees blo normal.

Tuesday night and Wednesday the ridge will be pushed to the east
by a trof and a 15 to 30 percent chc of rain will develop across
the Central Coast. Wednesday, otherwise, will be partly cloudy and
a couple of degrees cooler.

&&

.AVIATION...29/0952Z.

At 0832Z at KLAX, the marine layer was 3600 ft deep. The top of
the inversion was at 5800 ft with a temperature of 12 C.

High confidence in VFR TAFs for KPMD and KWJF.

Moderate confidence in remaining TAFs with VFR mid and high level
clouds likely through the period. Periods of SCT-OVC 020-030 are
possible through the TAF period, mostly thru 18Z for coastal and
coastal valley sites.

KLAX...Moderate to high confidence in TAF. BKN to OVC020-030 cigs
possible through the period, mostly thru 18Z. Any east wind
component is expected to remain under 8 kt.

KBUR...Moderate to high confidence in TAF. BKN to OVC020-030 cigs
possible through the period, mostly thru 18Z.

&&

.MARINE...29/701 AM.

Conditions are expected to remain below Small Craft Advisory
(SCA) levels through Saturday. Southwest flow aloft will produce
chances for drizzle and isolated light rain showers Today & Friday.

A storm system is likely to impact the coastal waters this weekend.
However, guidance continues to shift to the south with some solutions
with showers only as far north as the Channel islands. Regardless,
there will be some gusty SCA NW winds behind the system on Sunday.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Coastal Flood Advisory in effect until 2 PM PDT Friday for
      zones 87-340-346-349-350-354-362-366. (See LAXCFWLOX).
PZ...NONE.

&&

$$

PUBLIC...Rorke/Thompson
AVIATION...Rorke
MARINE...Black
SYNOPSIS...Lewis

weather.gov/losangeles

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

NWS Los Angeles (LOX) Office