Lake Nacimiento, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

605
FXUS66 KLOX 121025
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
325 AM PDT Sat Jul 12 2025

.SYNOPSIS...11/1135 PM.

Night through morning low clouds and patchy fog will affect the
coasts and lower valleys into next week. Max temperatures will
cool today and will end up several degrees below normal. There
will be continued cooling through the middle of next week with
valley highs on Tuesday only in the 80s.

&&

.SHORT TERM (TDY-MON)...11/1149 PM.

A small high hgt (~594 dam) upper high will sit atop Srn CA for
the three day short term. warming effects of the warm upper high
will be more than countered by very strong onshore flow to the
east (~9mb in the afternoon) and to the north (~6mb in the
afternoon)

The strong onshore push will bring a night through morning low
cloud pattern to the area for all three days. The high hgts will
keep the marine layer smooshed enough to keep it out of some of
the vlys. The strong capping inversion and coupled with the strong
onshore flow will make for slow clearing and likely no clearing at
many west facing beaches. Low clouds will come roaring back
inland during the early evening hours.

After Friday`s big cool down there will not be much day to day
change in temperatures. Max temps will mostly be in the 70s across
the csts (mid to upper 60s beaches) with 80s and lower 90s in the
vlys. These max temps are mostly 3 to 6 degrees blo normal for the
csts/vlys. The Antelope Vly, free from marine influence, will
continue about 5 degrees above normal.

Lastly the strong north push will bring gusty winds to the
interior, esp the western Antelope Vly and foothills. Wind speeds
will be close to advisory levels but likely just under with a few
of the typical gusty locations seeing gusts to 45 mph.

.LONG TERM (TUE-FRI)...12/1201 AM.

The upper high breaks down on Tuesday and hights fall to to about
591 dam. The strong onshore flow will remain and this will bring
2 to 4 degrees of cooling to almost all of the area. Max temps
will end up 4 to 8 degrees below normal.

The strong onshore flow will continue and may even become a mb
stronger. Conditions on Wed and Thu will be very Temps will not
change much from those readings on Wednesday and Thursday. The
night through morning low clouds and fog will continue unabated
and the beaches will continue to struggle with clearing.

The strong onshore flow will bring gusty (likely advisory level)
winds to some of the mountains as well as the western portions of
the Antelope Valley and foothills. Additionally, the gusty winds
across the mountains and interior along with fairly warm
temperatures and fairly low humidities through Tuesday, will
bring an uptick in fire weather danger.

On Friday both the GFS and EC show a significant increase in
moisture at 700 mb and above advecting in from the SSE. Skies may
turn partly cloudy. Right now there is a 5 to 10 percent chance
for high based thunderstorms.

&&

.AVIATION...12/1025Z.

At 07Z at KLAX, the marine layer was 1700 ft deep. The top of the
inversion was near 3500 feet with a max temperature of 25 C.

High confidence in VFR TAFs for KPMD, KWJF, and KPRB.

Moderate confidence in remaining TAFs. Timing of CIG/VSBY
restrictions may be off by 2 hours and one flight category.

KLAX...Moderate confidence in TAF. No significant east wind
component expected.

KBUR...Moderate confidence in 00Z TAF, except low confidence after
06Z with a 40% chance VFR conds prevail after that time.

&&

.MARINE...12/1225 AM.

There is a 30-50 percent chance of Small Craft Advisory (SCA)
conditions focused across the southern Inner Waters Sunday
afternoon and evening. Otherwise, SCA conditions are unlikely
through at least early next week.

Night to morning patchy dense fog is possible
through at least this weekend.

&&

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

&&

$$

PUBLIC...Rorke
AVIATION...Munroe
MARINE...Munroe
SYNOPSIS...30

weather.gov/losangeles

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