504
FXUS66 KSGX 081739
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
939 AM PST Fri Nov 8 2024

.SYNOPSIS...
Winds will be much weaker through the weekend, with a warming
trend for inland areas. For late Monday into early Tuesday,
onshore flow will strengthen as a low pressure system moves
quickly inland through California. This will bring cooling,
stronger and gusty west winds to the mountains and deserts, a
return of night and morning coastal low clouds, and a slight
chance for light showers Monday night from the coast to the
mountains. Then dry and warmer for the middle of next week.

&&

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

Clear, cool and dry this morning with light offshore winds.
Temperatures are lower than at this time yesterday in the coastal
areas and the San Diego County valleys but mostly higher
elsewhere. The offshore winds have weakened but a few of the
wind-prone locations are still gusting to around 20 mph at this
hour.

High temperatures for inland areas will warm through the weekend
under a weak transient ridge of high pressure, with Sunday high
temperatures for the mountains, inland valleys, and high desert a
few degrees above average and for coastal areas a few degrees
below average. High temperatures for the coast mostly in the mid
to upper 60s and for the valleys mostly in the 70s. Some patchy
low clouds and fog could return near the coast as early as late
Saturday night into early Sunday morning as the sea breeze returns.

Numerical models still show some relatively minor timing and
amplitude differences with a low pressure trough moving quickly
inland through California Monday into Monday night. This will
strengthen the onshore flow across California for late Monday into
early Tuesday. Cooling will begin to spread inland on Monday,
with high temperatures a few degrees cooler than Sunday for the
coast and valleys. Cooling will continue to spread inland on
Tuesday with the mountains and high desert 4 to 8 degrees cooler
than Monday. There will also be stronger and gusty west winds for
the mountains and deserts late Monday into Tuesday along with a
slight chance of light showers from the coastal waters to the
mountains Monday night. Then dry and warmer with weak offshore
winds at times for the middle of next week.

As we approach the end of next week, another trough of low
pressure moves in off the Pacific. The spread in the timing and
trajectory among model solutions is significant and makes the
forecast details very uncertain beyond next Wednesday.

&&

.AVIATION...
081600Z...Generally light winds today and tonight, with weak
offshore winds overnight and in the morning followed by typical
afternoon breezes. Patchy low clouds possible offshore early
Saturday morning but no impacts to any sites expected.

&&

.MARINE...
Slightly stronger northwest winds are expected Monday ahead of a
Pacific weather system, otherwise no hazardous marine conditions
expected through Tuesday.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Red Flag Warning until 11 AM PST this morning for Riverside
     County Mountains-Including The San Jacinto Ranger District
     Of The San Bernardino National Forest-San Bernardino County
     Mountains-Including The Mountain Top And Front Country
     Ranger Districts Of The San Bernardino National Forest-San
     Bernardino and Riverside County Valleys  -The Inland Empire-
     San Diego County Mountains-Including The Palomar And
     Descanso Ranger Districts of the Cleveland National Forest.

PZ...None.

&&

$$

PUBLIC...PG
AVIATION/MARINE...Small