Oasis, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

256
FXUS66 KSGX 122039
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
139 PM PDT Sat Apr 12 2025

.SYNOPSIS...
Subtle cooling this weekend followed by more significant cooling
for the second half of next week. Low clouds and fog will
continue across the coastal areas and western valleys each morning
through the middle of next week. There is a 10-15% chance of
light precipitation over the mountains Monday night, and then a
15-30% chance for the mountains westward at times Thursday night
through Saturday.

&&

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

One final hot day before a significant shift in the pattern. Highs
today range from the 60s/70s along the coast and in the mountains,
80s for inland/valleys, and 80s/90s for the deserts, region-wide
around 5-15 degrees above normal. The ridge responsible for our heat
the past several days is quickly shifting eastward with the thermal
axis set up over New Mexico and West Texas. As heights fall today
and tonight, a quick bout of gustier west winds will develop across
the deserts and mountains, with the strongest gusts up to 40-45 mph
expected in the mountain passes and desert slopes, peaking late
afternoon. Winds fall through Sunday morning as an upper level
trough pushes down from Oregon, reaching Central California and
pinching off to become a cutoff low by late Sunday with cooler
temperatures. This low settles along the Central Coast while weak
ridging builds over Southern California Monday, and high
temperatures may actually tick up a degree or two over Sunday`s
highs.

A separate low off the coast of San Diego will interact with
this newly developed low, allowing the coastal San Diego one to
sweep across Baja and into the region, becoming an open trough
Monday into Tuesday. Sufficient moisture will be lacking as this
trough moves across, severely limiting the potential for any
associated precipitation early next week. Models have continued to
pull back on even mentionable rain in the mountains, so have trended
down with POP chances in this time frame. Instead, higher confidence
in cooler temperatures after Monday, with highs generally at or below
normal nearly everywhere west of the deserts by Tuesday.

In the continuation of the series of low pressure systems, the
Central CA low will become absorbed into a new low that will be
pinched off from the broader trough across the PacNW, and this low
will also move into California Wednesday into Thursday. This is the
point that long-range guidance begins to disagree, both with the
movement of this low and the arrival of another, significantly
deeper low, coming from eastern Oregon. There needs to be better
alignment with the models on this late week pattern before
confidence can increase on what may be the next impactful system,
but at this point chances are increasing for some meaningful
precipitation sometime late Thursday into Saturday, and potentially
some snowfall for the mountains. Regardless of how the precipitation
sets up, temperatures look to fall substantially by Thursday/Friday,
down to the 60s for everywhere but the deserts, possibly 10-20
degrees below normal. Stay tuned.

&&

.AVIATION...
122030Z...Low clouds at the beaches will push inland coastal
areas around 01Z...reaching the western valleys after about 13/05Z
Sun. Higher bases...around 1200 ft MSL most areas. FG where
clouds intersect terrain. 60% chance of low clouds/FG pushing into
the western inland empire locations such as KONT. Low clouds
retreating to beaches around 16z-18z Sun, but again will linger
along the immediate coast through the day.

Elsewhere...Mostly clear skies with VFR conditions. Local west wind
gusts 25-35 kt over the mountains into the passes and deserts
afternoons and early evenings through Sunday.

&&

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

&&

.BEACHES...
Surf 3-6 feet, with local sets to 7 feet on southwest facing
beaches, are expected through Sunday morning, bringing a high risk
for rip currents.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement until 11 PM PDT this evening for Orange
     County Coastal Areas.

PZ...None.

&&

$$

PUBLIC...Zuber
AVIATION/MARINE/BEACHES...Small