Monrovia, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

030
FXUS66 KLOX 071923
AFDLOX

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
1223 PM PDT Sat Jun 7 2025

.SYNOPSIS...07/916 AM.

Night through morning low clouds and fog will continue for the
next several days over the coast and valleys with slow, if any,
clearing at the coast. A warming trend will develop for the
weekend and through next week, mainly for inland areas.

&&

.SHORT TERM (TDY-TUE)...07/1213 PM.

No significant changes to the forecast through Tuesday. An upper
low off Central California continues to maintain a deep marine
layer, keeping temperatures on the cooler side. Latest models show
the deep marine layer will continue at least one more day along
with a moderate to strong onshore flow which is typical for this
time of year. By Monday and Tuesday most of the ensemble solutions
show the upper low moving east of the area with a quick pop up
ridge that will boost temperatures early in the week with warmer
valley highs at least reaching the lower 90s and around 100
across the Antelope Valley. Coastal areas will continue to be
influenced by a shallower but still present marine layer and still
moderate to strong onshore flow, keeping coastal highs in the 60s
to lower 70s. Gusty southwest winds will be a daily occurrence
across the AV in additional to gusty northwest winds across
southwest Santa Barbara County in the late afternoon and evening.

.LONG TERM (WED-SAT)...07/1223 PM.

A cooling trend will begin Wednesday as a series of weak troughs
move through the Pac NW and northern California. Moderate to
strong onshore flow will persist and with the shift to a trough
pattern temperatures will drop 3-5 degrees each day through
Friday, bringing highs back down below normal as early as Thursday
and lasting into next weekend. Low clouds and fog will push back
into the valleys with slow afternoon clearing.The daily gusty
wind pattern will continue across the AV and southwest Santa
Barbara County. Overall a very typical June weather pattern.

&&

.AVIATION...07/1851Z.

At 1659Z at KLAX, the marine inversion was 2200 feet deep. The
top of the inversion was 4200 feet with a temperature of 22
degrees Celsius.

High confidence in VFR TAFs at KPRB, KPMD, and KWJF. There is a
10% chance for LIFR to IFR cigs at KPRB after 12Z.

Moderate confidence in TAFs for KBUR and KVNY. Arrival of cigs
tonight may be as late as 10Z. There is a 20% chance for LIFR
conds.

Moderate to low confidence in remaining TAFs. There is a chance
for no clearing at KOXR (30%), KCMA (20%), KSMO (20%), KLGB (20%)
and KLAX (30%). Otherwise, arrival times of cigs may be off +/- 3
hours. Minimum flight cats may be one cat higher than minimum
fcst cat overnight.

KLAX...Moderate confidence in TAF. There is a 30% chance for no
clearing today. Otherwise, return of cigs may be off +/- 2 hours.
There is a 20% chance cigs remain 010 or higher through the
period. No significant east wind component is expected.

KBUR...Moderate confidence in TAF. Arrival of cigs tonight may be
as late as 10Z. There is a 20% chance for LIFR conds.

&&

.MARINE...07/844 AM.

Moderate confidence in conditions remaining below Small Craft
Advisory (SCA) levels through Sunday morning. NW winds will then
increase to SCA levels in the Outer Waters south of Point
Conception and the western portion of the Santa Barbara Channel
Sunday afternoon. SCA level NW winds will become more widespread
across the Outer Waters and potentially the Inner Waters along
the Central Coast Monday afternoon through much of the work week,
and chances for SCA level winds for the western portion of the SBA
Channel will also increase. Moderate to high confidence in winds
remaining below SCA levels across the remainder of the Inner
Waters south of Point Conception.

&&

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

&&

$$

PUBLIC...MW
AVIATION...Lewis
MARINE...Lewis
SYNOPSIS...MW

weather.gov/losangeles

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