FXUS66 KSGX 150916
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
216 AM PDT Wed Apr 15 2026

.SYNOPSIS...
High temperatures will warm to around average today. Stronger
onshore flow will spread cooling inland on Thursday with
southwest to west winds for the mountains and deserts gusting to
35 to 45 mph. The flow will turn offshore on Friday with warming
for the coast and valleys and continued cooling for the deserts.
There will be northeast winds along and below the coastal slopes
of the mountains gusting to 35 to 45 mph. Warmer with weaker winds
for next weekend with high temperatures warming to around 5 to 10
degrees above average on Sunday. Then cooler and breezy early
next week as a low pressure system moves toward the California
coast.

&&

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

.SHORT TERM (Today through Friday)...
High temperatures will continue to warm today, warming a degree
or two near the coast to around 5 degrees inland. High
temperatures for today will be around average, ranging from the
upper 60s near the coast to the mid to upper 70s for the Inland
Empire with the upper 80s for the lower deserts.

A low pressure system moving through the Great Basin and northern
Rockies on Thursday will strengthen the onshore flow across
southern California. There will be stronger southwest to west
winds for the mountains and deserts during the afternoon and
evening with gusts to 35 to 45 mph. High temperatures will be a
few degrees cooler with high temperatures ranging from the mid to
upper 60s near the coast to the lower to mid 70s for the Inland
Empire with the mid to upper 60s for the lower deserts. Clouds
will increase late tonight into Thursday, then decrease Thursday
night.

For late Thursday night and Friday, the lower-level flow will
become offshore with north to northeast winds along and below the
coastal slopes of the mountains gusting to 35 to 45 mph with
isolated gusts to 55 mph. High temperatures for the deserts will
be several degrees cooler on Friday while the coast and valleys
warm 5 to 10 degrees. High temperatures on Friday will be mostly
in the 70s for the coast and valleys to around 80 for the western
valleys and inland coastal areas with the lower deserts around
80.

&&

.LONG TERM (Saturday through Tuesday)...
There will be inland warming during the weekend with weaker winds.
High temperatures on Saturday will warm 5 to 10 degrees for inland
areas. High temperatures on Sunday will warm another 5 degrees or
so for the deserts into the mountains while coastal areas into the
western valleys are a few degrees cooler. High temperatures on
Sunday will be 5 to 10 degrees above average, ranging from the
lower 70s near the coast to the lower to mid 80s for the Inland
Empire with the lower deserts in the lower 90s. Cooler and breezy
for early next week as a Pacific low pressure system moves toward
the California coast.

&&

.AVIATION...
150930Z...Coasts...Patchy low clouds based around 1200-1800 feet MSL
are most likely (40% chance at coastal airports) between 13-17Z this
morning. Patchy low clouds to redevelop after 06Z overnight into
Thursday. Any cigs that form would be 1500-2000 feet MSL.

Otherwise...mostly clear and VFR conditions today through tonight.

&&

.MARINE...
Wind gusts to reach around 20 kts near San Clemente Island Thursday
afternoon and evening. Otherwise, no hazardous marine conditions are
expected through Sunday.

&&

.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