409
FXUS66 KSGX 081557
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
900 AM PDT Wed May 8 2024

.SYNOPSIS...
A Catalina Eddy spinning over the coastal waters this week will
bring May Gray clouds each night and morning that will clear back to
the coast each afternoon. Weak offshore flow will bring gusty north
winds to the Inland Empire below the Cajon Pass today. Slow warming
in the mountains and deserts this week, but not much temperature
change in the coastal and valley zones.

&&

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

The 8 AM visible satellite image showed the circulation center of
the Catalina Eddy five miles south of San Clemente Island. This eddy
will persist through Friday morning and the marine layer clouds will
spread into the inland valleys each night before retreating back to
the coast each afternoon. Clearing will be limited at the coast
where the beaches may only see filtered afternoon sun.

A brief period of offshore flow will clear the skies in the Inland
Empire today and also bring blustery north winds in and below the
Cajon Pass. Gusty north winds will also funnel through the Morongo
Valley in the the northern Coachella Valley.

Highs this week will be close to the seasonal norms for mid-May.
Over the weekend the mountains and deserts will see a few degrees of
warming but the coastal and valley highs will remain relatively
unchanged.

The weather outlook for early next week is for little change in the
May Gray pattern as a weak Pacific trough moves inland across SoCal
Monday through Wednesday.

&&

.AVIATION...
081530Z...Coast/Valleys...Low clouds with bases 1600-2200 feet MSL
and tops to 2400 feet will continue to cover most coastal areas and
portions of inland valleys. Local vis 4-6 SM in BR/HZ where clouds
near terrain in the valleys. Clouds are expected to clear around 16-
18Z, but with occasional BKN clouds near coast thereafter. Low
clouds pushing back inland across San Diego County after 02Z and
into Orange County after 06Z and spreading locally into inland
valleys by Thursday morning. Otherwise mostly clear with
unrestricted vis through Wednesday evening.

Northerly winds to spread through Morongo and Cajon Passes southward
into valleys through 18Z. Local gusts 30-40 kt, weakening after 18Z.
MOD up/downdrafts and pockets of LLWS possible over and downwind of
the mountains.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.

&&

$$

PUBLIC...Moede
AVIATION/MARINE...Suk