Arrowhead Highlands, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

020
FXUS66 KSGX 231041
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
341 AM PDT Fri May 23 2025

.SYNOPSIS...
Cooler with a deepening marine layer into the weekend with night
and morning coastal low clouds spreading farther into the valleys
with slow or limited afternoon clearing near the coast. There
will periods of stronger and gusty southwest to west winds for the
mountains and deserts during the afternoons and evenings through
Sunday. Areas of night and morning marine layer clouds continue
into the middle of next week with highs near seasonal averages.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.SHORT TERM (Today through Sunday)...
Cooling will spread inland today as a weak pressure system moves
inland through southern California tonight with the greater
cooling expected on Saturday. Saturday high temperatures will be
mostly around 5 degrees below average, ranging from the mid 60s
near the coast to the 70s to around 80 for the Inland Empire with
the 90s for the lower deserts. Sunday will warm slightly with weak
high pressure aloft.

The marine layer continues to slowly deepen, to around 1500 to
2000 feet this morning with continued deepening to around 2500
feet expected for tonight into Saturday morning. Coastal low
clouds will spread inland into the western valleys this morning,
then into portions of the inland valleys for tonight into Saturday
morning with not much change for Saturday night and Sunday.
Afternoon clearing near the coast may be limited or slow through
the weekend.

Gusty southwest to west winds for the mountains and deserts during
the late afternoon through late evening will be stronger today
with gusts to 35 to 45 mph and isolated gusts to 60 mph in the
northern Coachella Valley below the San Gorgonio Pass.

&&

.LONG TERM (Monday through Thursday)...
Weak low pressure will remain across the area with slight warming
for Monday and Tuesday, not much change for Wednesday, then
greater warming for Thursday and Friday. The greatest spread in
the high temperature guidance for next week is for the valleys and
inland Orange County, reflecting greater spread in the depth of
the marine layer. In general through the middle of next week,
night and morning low clouds will spread inland into portions of
the valleys with slow or limited afternoon clearing near the
coast. Later next week, the marine layer will become shallower
with less spread of coastal low clouds into the valleys.

&&

.AVIATION...
230800Z...Coasts/Valleys...Low clouds based 800-1400ft MSL have
moved inland up to 15 miles, and may continue to push further
through 14z. Local VIS reductions 1-3SM for higher coastal slopes
and inland valleys with the highest confidence between 11-14z. 40%
chance CIGs reach KONT and 20% at KSBD. Clearing around 17-18z. Low
clouds return again this evening after 01-02z, with slightly higher
bases 1500-2000ft MSL and better chances for CIGs and reduced VIS
through the Inland Empire after 06z.

Elsewhere...Clear with unrestricted VIS through this morning. Strong
west winds over mountains, passes and desert slopes with gusts
locally to 35-50kts this afternoon. Mod up/downdrafts with patchy
BLDU possible reducing VIS down to 3SM at times, primarily after
18z. Winds slowly weaken through Saturday morning.

&&

.MARINE...
Winds gusting to 20kts near San Clemente Island this afternoon with
waves of 5-7 feet, subsiding Saturday morning. Otherwise, no
hazardous marine conditions are expected through Wednesday.

&&

.BEACHES...
Long period (17-18 seconds) south-southwest swell increases today
into Sunday, with surf of 4-6 feet and sets up to 7 feet possible
Saturday through Monday with a high rip current risk. Surf begins to
subside on Tuesday.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory from 5 PM this afternoon to 3 AM PDT Saturday for
     San Gorgonio Pass near Banning.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE/BEACHES...Zuber