Arroyo Grande, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

128
FXUS66 KLOX 061228
AFDLOX

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
528 AM PDT Fri Jun 6 2025

.SYNOPSIS...06/1233 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. Cooler than normal temperatures are
expected today, then a warming trend will develop for the weekend
and through next week, especially away from the beaches.

&&

.SHORT TERM (TDY-SUN)...06/250 AM.

The marine layer is 2000 ft deep. Marine layer stratus covers all
the csts and vlys and is also working its way to Paso Robles by
way of the Salinas River Vly. Expect a similar slow to no clearing
pattern today as the onshore push to the east will again top out
near 7 mb in the afternoon. The atmosphere has dried out and there
is no threat of convection. Hgts will rise slightly today as a
high hgt upper low pulls off to the west and a ridge pushes slowly
up from the north. The marine layer will keep max temps similar to
ydy along the coast but the higher hgts will bring a few degrees
of warming to areas further inland. Max temps across the csts/vlys
will remain 3 to 6 degrees blo normal while the Antelope Vly and
other far interior vlys will end up 4 to 6 degrees above normal.

Look for a very similar marine layer stratus pattern tonight and
Saturday. The ridge asserts itself a little more and hgts climb to
586 dam. These hgt rises will warm the whole area by 1 to 2
degrees.

The increased hgts will smoosh the marine layer down and this
should keep many vly areas cloud free Sunday morning. Offshore
trends from the north will allow for earlier clearing for many
areas. The less robust marine layer will trigger a spike in temps
for the vlys where max temps will climb 3 to 6 degrees the coasts
will only see 1 or 2 degrees of warming save for the SBA south
coast where better offshore flow will warm that area 5 to 7
degrees. Most areas except for the beaches and the Central Coast
will warm to above normal.

The strong onshore flow will bring typical breezy afternoon
conditions to the western Antelope Vly and foothills as well as an
enhanced sea breeze to the coastal areas.

.LONG TERM (MON-THU)...06/249 AM.

Hgts slowly climb both Mon and Tue and are forecast to reach 591
dam by Tuesday. While the onshore flow in the afternoon will
remain fairly strong it will be weaker in the morning. Hgts this
high should keep most of the low clouds out of the vlys. Max temps
warm another 1 to 2 degrees on Monday and then remain about the
same on Tuesday. Max temps across the csts will be in the 70s with
80s throughout the vlys. The Antelope Vly will see max temps a
few degrees either side of 100.

The ridge weakens Wed and Thu and the onshore flow increases.
Looks for a return of the low clouds to the vlys. Max temps will 1
to 3 degrees on Wed and an additional 2 to 4 degrees on Thu. This
cooling will bring most of the csts and vlys back down to below
normal temperatures.

&&

.AVIATION...06/1226Z.

At 1130Z at KLAX, the marine layer was 2300 feet deep. The top of
the inversion was at 3900 feet with a temperature of 20 C.

High confidence in VFR TAFs for KPMD and KWJF.

Moderate confidence in all remaining TAFs. Timing of flight cat
changes may be off by +/- 2 hours. Afternoon VFR transitions may
not occur for coastal sites with the transition, and may occur for
coastal sites without. There is a 20% chance of LIFR cigs at
KPRB, and equal chances VFR conds prevail through fcst pd. There
is a 20-30% chance of LIFR conds at KSBP, KSBP, and KSMX.

KLAX...Moderate confidence in TAF. cigs may scatter and reform
through 08Z before settling in for the night. Intermittent IFR
cigs (007-009) are possible through 18Z Fri. There is a 30%
chance of a VFR transition 18Z Fri-03Z Sat. No significant east
wind component expected.

KBUR...Moderate confidence in TAF. Flight cat transitions may be
off by +/- 2 hours.

&&

.MARINE...06/134 AM.

Typical northwest to west winds are expected this weekend,
especially across the waters south of Point Conception. There is a
30% chance of Small Craft Advisory (SCA) winds across western
portions of the Santa Barbara Channel this afternoon and evening.

There is increasing chances for SCA winds across the waters
around Pt. Conception, Northern Channel islands, and down to San
Nicolas Saturday (40%) into Sunday (60%). Short period choppy seas
are likely nearshore.

Next week will be characterized by increasing chances and coverage
for SCA winds across the outer waters, and seas building towards
SCA levels mid-week and beyond. Confidence is low (seas) to
moderate (winds).

&&

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

&&

$$

PUBLIC...Rorke
AVIATION...Lund
MARINE...Black/Lund
SYNOPSIS...MW/Smith

weather.gov/losangeles

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