Rubidoux, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

690
FXUS66 KSGX 052027
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
127 PM PDT Thu Jun 5 2025

.SYNOPSIS...
There is a slight chance of showers and thunderstorms for this
afternoon for the San Bernardino Mountains and the High Desert. The
marine layer will stay a similar depth into Friday with patchy
drizzle overnight and Friday morning, before becoming shallower over
the weekend. A gradual warming trend is expected through the
weekend, with the potential for continued warming into early next
week.

&&

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

Visible satellite at 1 PM was showing areas of low clouds lingering
along portions of the coast and in the valleys, mainly in San Diego
County. It was also showing some cumulus cloud development over the
mountains and in the High Desert. The marine layer is expected to be
a similar depth as last night tonight into Friday morning, with
patchy drizzle likely west of the mountains. The marine layer is
expected to get shallower over the weekend as higher pressure tries
to build from the south.

Slight chances (15-20 percent) of showers and thunderstorms has been
maintained in the forecast for this afternoon for the San Bernardino
mountains and High Desert. HREF is indicating rainfall rates will
remain less than 0.30 inches per hour. The atmosphere continues to
dry out Friday through the weekend, with no additional chances of
showers/thunderstorms for at least the next week.

Conditions will warm into the weekend with increasing potential for
warming to continue into early next week. Latest guidance has
trended warmer from the valleys to the deserts for early next week.
Ensemble guidance is in better agreement that the weak low pressure
system off the California coast will weaken and move to the west
with high pressure to the south expanding into Southern California.
NBM chances for high temperatures to exceed 110 degrees in the low
deserts are the highest on Monday at 15 to 35 percent. Chances for
high temperatures to exceed 105 degrees are highest Sunday and
Monday at 80 to 95 percent. West of the mountains, chances of
exceeding 100 degrees for Monday and Tuesday are localized to the
eastern Inland Empire near 15 percent. Chances of exceeding 95
degrees are 10 to 25 percent for the valleys, with local areas in
the eastern portion of the Inland Empire closer to 65 percent on
Monday and Tuesday.

Temperatures will decrease a few degrees on Tuesday, with ensemble
guidance indicating a continued decrease in temperatures for
Wednesday and Thursday. By next Thursday, June 12, 80 percent of
ensemble solutions show an incoming trough of low pressure will push
the ridging east. Within that 80 percent, most of the uncertainty is
surrounding the amplitude of the incoming trough.

&&

.AVIATION...
052000Z....Coast/Valleys...Clearing has mostly occurred across the
Inland Empire and Orange County, with slower clearing for San Diego
County. VIS is slowly improving and is above 4SM with bases 2100-
2700ft MSL. Some areas, especially southwestern SD County may not
see full clearing today (50% confidence in not clearing). Low clouds
push inland again after 00Z with very similar coverage, bases, vis,
and patchy -DZ overnight into Friday morning, with similar slow
clearing late Friday morning.

Mountains/Deserts...Mostly clear through tonight. Cumulus and ISO
SHRA/TSRA based at 10,000ft MSL 20-01Z over mountains and high
desert.

&&

.MARINE...
No hazardous marine conditions are expected today through Monday.

&&

.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...Zuber