Arrowhead Highlands, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

935
FXUS66 KSGX 121009
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
309 AM PDT Thu Jun 12 2025

.SYNOPSIS...
Generally seasonal weather will prevail into next week. Not much
change in high temperatures is expected through Friday, then
warming for the weekend to around 5 to 10 degrees above average
for inland areas on Sunday. Cooling for early next week to around
average on Tuesday, then warming to around 5 degrees above
average for inland areas on Wednesday. Night and morning coastal
low clouds will continue to spread into portions of the valleys.

&&

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

.SHORT TERM (Today through Saturday)...
The marine layer remains around 2000 feet deep. However cloud
bases are lower with the depth of the saturated cloud layer a
little deeper than 24 hours ago. There could be some patchy
drizzle this morning as well as some lower visibilities in fog for
the mesas and other higher coastal terrain.

Not much change in high temperatures is expected through Friday
with high temperatures around average for the coast and valleys
and around 5 degrees above average for the deserts. High
temperatures through Friday will range from around 70 near the
coast to the 80s and lower 90s for the Inland Empire with 104 to
108 for the lower deserts. High pressure to the south will bring
warming of a few to around 5 degrees for Saturday.

&&

.LONG TERM (Sunday through Wednesday)...
High pressure to the south will continue the warming through
Sunday with Sunday high temperatures 5 to 10 degrees above
average. High temperatures on Sunday will range from the lower
70s near the coast to the upper 80s to upper 90s for the Inland
Empire with 110 to 114 for the lower deserts.

Stronger onshore flow and slight weakening of high pressure aloft
will spread cooling inland on Monday and Tuesday with Tuesday
high temperatures around average to a few degrees below average.
High temperatures on Tuesday will range from around 70 near the
coast to the 80s to around 90 for the Inland Empire with 104 to
108 for the lower deserts. Then warming on Wednesday to around 5
degrees above average for the mountains, deserts, and inland
valleys.

A marine layer near 1500 to 2000 feet deep on Sunday may deepen to
around 2000 to 2500 feet on Tuesday with night and morning coastal
low clouds spreading farther into the valleys.

&&

.AVIATION...
120930Z....Coast/Valleys...Low clouds based around 600-1000 feet MSL
with tops to around 2000 feet will continue to fill most of the
inland valleys through 14Z. Vis reduced over higher coastal terrain
between these levels. Inland areas scatter out 16-17Z, and 18-20Z
for coastal areas, with partial if any clearing at the immediate
coast. Low clouds will begin to move inland after 01Z and into
valleys early Friday, but not as extensively as this morning.
Bases/vis will be similar or slightly lower.

Otherwise...mostly clear skies and unrestricted vis today and
tonight.

&&

.MARINE...
No hazardous marine conditions are expected today through Monday.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE...MM