205
FXUS66 KSGX 030456
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
956 PM PDT Tue Jun 2 2026

.SYNOPSIS...
Warming conditions for inland locations through Thursday. Coastal
low clouds and fog will be present each night and morning, reaching
into portions of the valleys. Cooling conditions expected Friday
through Sunday with a few degrees of warming Monday and next
Tuesday.

&&

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

An upper level area of low pressure currently over the California
Bight will slowly move south and east Wednesday and Thursday. High
temperatures today are expected to be similar to Monday`s, with
warming conditions for Wednesday and Thursday as weak ridging
develops over Southern California. The mid-week warming will bring
highs to 5 to 10 degrees above average for the valleys, mountains,
and deserts and 3 to 6 degrees above average along the coast. Night
and morning low clouds and fog will spread from the coast into the
valleys tonight into Wednesday morning becoming shallower into
Thursday morning, only reaching the western valleys.

An area of low pressure will approach the Pacific Northwest Friday,
digging south into California by Sunday. This weather system will
bring a few degrees of cooling each day Friday through Sunday,
taking temperatures for inland locations to few degrees below
normal. Additionally, the marine layer will deepen again with low
clouds expected to reach into the valleys.

For Monday, weak troughing looks like it remains over California
keeping highs slightly below average. By next Tuesday the NBM shows
a few degrees of warming which will bring highs to just above
average.


&&

.AVIATION...
030430Z...Coast/Valleys...Low clouds based 1500-2000 ft MSL have
redeveloped over coastal San Diego County this evening. Clouds
expand northward and inland overnight, eventually reaching into
portions of the Inland Empire by 12z. 70% chance for cigs at KONT
and 50% at KSBD. Minor vis reductions (4-6SM) for elevated inland
valleys. Scattering to the coastline by 17-18z Wed. Low clouds
return to coastal areas Wed evening with lower bases around 1000-
1500 ft MSL. Less inland extent Wednesday night with clouds
remaining confined to coastal areas and western valleys.

Mountains/Deserts...Mostly clear skies and VFR conditions through
Wednesday evening.
.

&&

.MARINE...
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...CO
AVIATION/MARINE...KW

NWS San Diego (SGX) Office