512
FXUS66 KSGX 160939
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
239 AM PDT Tue Jun 16 2026

.SYNOPSIS...
Above average high temperatures will cool to below average for
Thursday through the weekend, then warm to above average by the
middle of next week. Night and morning coastal low clouds will
spread farther into the valleys by the weekend. There is a slight
chance of showers and thunderstorms for this afternoon along the
desert slopes of the mountains.

&&

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

...Updated aviation discussion...

.SHORT TERM (Today through Thursday)...
The late Monday afternoon sounding at NKX showed mid level
moisture centered around 600 mb with an isolated thunderstorm over
the desert slopes of the San Diego County mountains during the
late afternoon on Monday. Higher-resolution models show
convective development on the desert slopes of the mountains once
again for this afternoon along with a slight chance of showers
and thunderstorms. This will be followed by drying for Wednesday
and Thursday.

High temperatures for today will be a few degrees warmer than
Monday with high temperatures for today ranging from a few degrees
above average near the coast to 5 to 10 degrees above average for
the deserts. High temperatures for today will range from the lower
to mid 70s near the coast to the mid 80s to mid 90s for the Inland
Empire with 108 to 112 for the lower deserts.

There will be inland cooling on Wednesday with the greatest
cooling of high temperatures, of around 5 degrees, for the
mountains. There will be additional cooling on Thursday with high
temperatures a few degrees cooler near the coast and around 5
degrees cooler for inland areas. High temperatures on Thursday
will be as much as 5 degrees below average for the inland valleys
onto the coastal slopes of the mountains. High temperatures on
Thursday will range from the lower 70s near the coast to the 80s
for the Inland Empire with 104 to 108 for the lower deserts.

A marine layer around 1500 to 2000 feet deep will deepen to around
2000 to 2500 feet on Thursday with night and morning coastal low
clouds spreading farther into the western valleys for early
Thursday.

&&

.LONG TERM (Friday through Monday)...
There will be additional slight cooling on Friday and Saturday,
followed by slight warming on Sunday and greater warmer for Monday
and Tuesday of next week. High temperatures on Saturday will be
around average at sea level to 4 to 8 degrees below average for
the mountains and inland valleys. High temperatures on Saturday
will range from around 70 near the coast to the upper 70s to mid
80s for the Inland Empire with 100 to 104 for the lower deserts.
Night and morning coastal low clouds will spread farther into the
valleys into the weekend, then spread inland only into the
western valleys for early next week.


&&

.AVIATION...
160930Z...Coast/Western Valleys...Somewhat patchy low clouds based
1100-1500 ft MSL will persist along the coast and up to 10-15 miles
inland until mid-morning, with local areas of vis 3-6 SM for higher
terrain in coastal/western valley areas. Low clouds will begin their
retreat west after 15Z, clearing offshore 17-18Z. Similarly based
low clouds move back ashore in San Diego Co after 03Z Wed and Orange
Co after 09Z Wed, with similar inland extent.

Mountains/Deserts...VFR conditions are expected through the TAF
period, with the occasional SCT-BKN clouds 12-15k feet MSL. Breezy
westerly winds gusting 25-30 kts through mountain passes and into
deserts again Tuesday after 19Z through about 06Z Wed.

&&

.MARINE...
No hazardous marine conditions are expected through Saturday.

&&

.BEACHES...
Elevated surf and strong rip currents continue through Friday. Surf
of 3-6 feet with sets to 7 feet are expected at south-facing
beaches. Surf for southern San Diego County will be slightly lower,
but hazardous swimming conditions with high rip current and
longshore current risk will still exist. See the Beach Hazards
Statement for more details.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Friday evening for Orange County
     Coastal Areas-San Diego County Coastal Areas.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE/BEACHES...CSP

NWS San Diego (SGX) Office