Santa Ysabel, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

284
FXUS66 KSGX 100401
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
901 PM PDT Mon Jun 9 2025

.SYNOPSIS...
Shallower marine layer each morning through mid-week with high
temperatures 5-10 degrees above normal inland areas, peaking
Tuesday and Wednesday. A slight cool down is expected for the end
of the week before temperatures increase again for the weekend.

&&

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

Evening update...
Low clouds along the coast are slowly starting to move back
inland, and elsewhere skies are clear. The 00Z KNKX sounding shows
the marine inversion based near 2000 ft MSL, down about 200 ft
from this morning. Low clouds will spread into the western valleys
again overnight, clearing back to the coast by late morning,
though beaches may once again remain cloudy through much of the
day. An upper level ridge of high pressure will amplify off the
coast on Tuesday and Wednesday, bringing warmer weather for the
inland valleys into the deserts while the persistent, though
shallower, marine layer helps moderate temperatures near the
coast. The only caveat is the potential for a gulf surge into the
low deserts, which may limit warming if dew points are high enough
and moisture doesn`t mix out until later in the afternoon. Even
then, it would be the difference between high temps of 106-108 and
humid or 110+ and dry. The same holds true for Wednesday. In
general, high temperatures will be around 5-10 degrees above
normal both days for inland areas.

Previous discussion...
Late Wednesday an upper level low along the coast of Canada looks to
move southward towards Graham Island, flattening the high a bit and
zonal flow aloft looks to prevail over the region Thursday and
Friday. Around the same time, the weaker high will slowly move
eastward into Baja before reaching the Four Corners early Saturday,
with ridging quickly rebuilding. A slight cool down is expected for
the latter half of the week, but a return to ridging this weekend
looks to push highs back to well above normal, potentially even
warmer than earlier in the week. This pattern looks to holdover into
early next week with no meaningful cooldown or precipitation in
sight, a significant shift from just a few days ago where it seemed
troughing would prevail for the weekend.


&&

.AVIATION...
100300Z....Coast/Valleys...Low clouds currently over the beaches and
nearshore waters will begin to push inland shortly filling into most
of San Diego/Orange County valleys by 10z. Clouds will struggle to
move into the IE with only a 60% chance of reaching KONT. Bases
lowering to 500-1000 ft MSL will allow for IFR vis reductions for
elevated inland areas. FG where the cloud layer intersects terrain.
Scattering to the coast expected by 18-19z, but clouds may linger at
the beaches and nearshore waters through the afternoon. Low clouds
slowly move inland again after 00z Wednesday.

Mountains/Deserts...Mostly clear skies and unrestricted VIS through
Tuesday.

&&

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

&&

.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...SS/Zuber
AVIATION/MARINE...KW