Lake Forest, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

208
FXUS66 KSGX 080032
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
532 PM PDT Sun Jun 7 2026

.SYNOPSIS...
Near to slightly below average temperatures expected through Monday.
Gradual warming is forecast through the week, with temperatures
reaching above average by Tuesday. Hottest conditions are expected
Thursday through Saturday with areas of moderate HeatRisk expected
for inland locations. The marine layer will remain deep into Monday
morning, reaching into the Inland Empire. With building high
pressure aloft, the marine layer will become shallower for the
middle to end of the week.

&&

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

Weak troughing will linger over the US West Coast into tomorrow,
maintaining onshore flow, near to slightly below average
temperatures, and elevated winds through passes and locally into
the deserts. Peak wind gusts this afternoon will be 35 to 40 mph,
locally up to 50 mph through the San Gorgonio pass. Winds will
weaken as the trough moves north and east Tuesday, allowing for
heights to rise and conditions to begin to warm. Highs on Tuesday
are forecast to be a few degrees above average for inland
locations and 4 to 8 degrees above average for the coast.

Ridging aloft will take the place of the aforementioned troughing
for the middle to end of the week. The main axis of the ridge will
remain over the Pacific Ocean but the periphery of it will be over
the US West Coast. This will result in a warming trend for the
middle to end of the week. Warmest conditions will likely be
Thursday through Saturday, with highs 6 to 12 degrees above average.
Areas of moderate HeatRisk are expected for the Inland Empire and
the deserts.

With the predominately onshore flow, the marine layer will stay on
the deeper side into tomorrow morning, which will push low clouds
into the valleys. Starting Tuesday, the marine layer is expected
to become shallower as heights start to rise. By the end of the
week, low clouds and fog are only expected along the coast.


&&

.AVIATION...
080000Z...Coast/Valleys...Low clouds are beginning to develop off
the coast. Clouds reach the coast and surge inland 02-05z this
evening, filling into the Inland Empire gradually after 08z. Bases
are anticipated to be around 1500-2200 ft MSL with VIS reduced 0-5SM
in far inland valleys and in the foothills. Clouds scatter out 15-
17z, yielding to VFR conditions through the mid-afternoon.


Mountains/Deserts...VFR with SKC. Gusts 20-35 knots along desert
slopes and locally into deserts. Gusts are exceeding 40 kts through
the Banning Pass. Winds diminish gradually this evening into
tonight. MOD up/downdrafts and pockets of LLWS in lee (north and
east) of mountains. Similar winds Monday afternoon after 22z.

&&

.MARINE...
No hazardous marine conditions are expected through Thursday
afternoon.

&&

.BEACHES...
Surf and rip current activity to remain elevated (3-6 feet) through
Monday afternoon. Surf increases Monday evening as a fresh 3-4 foot
swell at 18-19 seconds moves into the region. Surf peaks Tues-Wed
with sets to 5-8 feet likely at south-facing beaches, then gradually
diminishes late this week.

&&

.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 late Monday night through Thursday
     afternoon for Orange County Coastal Areas-San Diego County
     Coastal Areas.

PZ...None.

&&

$$

PUBLIC...CO
AVIATION/MARINE/BEACHES...Westerink