166
FXUS66 KSGX 030955
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
255 AM PDT Thu Jul 3 2025

.SYNOPSIS...
Today will be slightly cooler than Wednesday, then warmer for
Friday and Saturday, little or no warming for Sunday and Monday,
then additional warming for Tuesday and Wednesday with high
temperatures on Wednesday of next week 5 to 10 degrees above
average for inland areas. The marine layer will become shallower
for the weekend into next week with night and morning coastal low
clouds spreading into portions of the western valleys late each
night.

&&

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

.SHORT TERM (Today through Saturday)...
A low pressure system over southern California early this morning
will weaken as it moves into Arizona today with a faster-moving
low pressure system to the north moving inland through northern
and central California tonight with weakening low pressure across
California on Saturday.

High temperatures today will be slightly cooler followed by
warming on Friday and Saturday with Saturday high temperatures
around average at lower elevations and around 5 degrees below
average for mountain elevations above 6000 feet.

A marine layer near 2000 to 2500 feet this morning with coastal
low clouds spreading into portions of the Inland Empire will
become gradually shallower for Friday and Saturday with night and
morning coastal low clouds not spreading as far into the valleys.

&&

.LONG TERM (Sunday through Wednesday)...
Not much change in high temperatures or slight warming for inland
areas on Sunday and Monday with high pressure over the interior
southwest states, low pressure off the northern California coast,
with generally dry south to southwest flow aloft over southern
California. Some shallow lower level monsoonal moisture could
begin to spread into the lower deserts next week with warmer
nights for the lower deserts and with some afternoon clouds along
the desert slopes of the mountains for the middle of next week.

High pressure aloft to the east will strengthen and expand for the
middle of next week, though with some model differences with the
placement. This will bring additional warming on Tuesday and
Wednesday with high temperatures on Wednesday 5 to 10 degrees
above average for inland areas. High temperatures on Wednesday
will range from the lower to mid 70s near the coast to the mid 90s
to 105 for the Inland Empire with 112 to 116 for the lower
deserts.

&&

.AVIATION...
030945Z....Coast/Valleys...Low clouds based 1200-1700 ft MSL have
pushed up to 20 miles inland across SD/Orange Counties. Clouds will
push slightly further with BKN CIGs reaching KONT, but not KSBD.
Minor vis restrictions (2-5SM) for elevated inland valleys including
the IE (KONT, KRNM). Clearing to the coast 16-18Z Thursday. 30-40%
chance SD County beaches and neashore waters remain BKN through the
afternoon. Low clouds at 900-1400 ft MSL to push inland again after
02Z Fri. Similar inland extent with clouds reaching into the western
and southern IE.

Mountains/Deserts...Mostly clear with unrestricted VIS through
Thursday night.

&&

.MARINE...
No hazardous marine weather conditions are expected through Sunday.

&&

.BEACHES...
Building southerly swell (190 degrees) of 3 feet at 14-17 seconds
will generate elevated surf of 3-5 ft with sets to 6 ft along
southerly facing beaches Thu-Sat. In addition, strong rip and
longshore currents expected at all beaches Friday and Saturday. A
Beach Hazards Statement is in effect and contains more information.
Swell and surf will begin to lower on Sunday.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement from 11 AM PDT this morning through
     Saturday evening for Orange County Coastal Areas-San Diego
     County Coastal Areas.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE/BEACHES...KW