611
FXUS66 KSGX 160902
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
202 AM PDT Thu Apr 16 2026

.SYNOPSIS...
Mid and high clouds will increase today with slightly cooler high
temperatures and southwest to west winds for the mountains and
deserts gusting to 35 to 45 mph during the afternoon and evening.
The flow will turn offshore on Friday with warming for the coast
and valleys and continued cooling for the deserts. There will be
north winds along and below the coastal slopes of the mountains,
peaking Friday morning with gusts to 35 to 45 mph. For the
weekend, weaker winds and warmer inland with Sunday high
temperatures 5 to 10 degrees above average. Some time during the
early to middle part of next week, a low pressure system will move
into California bringing cooler and breezy weather with a less
than 20 percent chance of precipitation.

&&

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

.SHORT TERM (Today through Saturday)...
A low pressure system moving inland to the north will strengthen
the onshore flow across southern California today into this
evening while a low pressure system passing by to the south brings
an increase in mid and high clouds today into this evening. High
temperatures for today will be a few degrees cooler. Southwest to
west winds for the mountains and deserts will strengthen today
with gusts to 35 to 45 mph during the afternoon and evening.

For late tonight and Friday, the lower-level flow across southern
California will turn offshore. Gusty north winds will strengthen
for late tonight into Friday morning with gusts to 35 to 45 mph
near and below the Cajon Pass, along and below the coastal slopes
of the Santa Ana Mountains, and in northern and eastern portions
of the Coachella Valley. High temperatures on Friday will warm
around 5 degrees for the coast and valleys and cool around 5
degrees for the deserts. High temperatures on Friday will be
mostly in the 70s for the coast and valleys to around 80 for the
western valleys and inland coastal areas with high temperatures
for the lower deserts in the lower to mid 80s.

Winds will weaken on Saturday and high temperatures for inland
areas will warm 5 to locally 10 degrees with high temperatures
ranging for the lower 70s near the coast to the lower to mid 80s
for the Inland Empire with the lower deserts around 90.

&&

.LONG TERM (Sunday through Wednesday)...
The warming will continue for inland areas on Sunday with high
temperatures on Sunday 5 to 10 degrees above average for most
areas. Sunday high temperatures will range from the lower 70s
near the coast to the lower to mid 80s for the Inland Empire with
the lower to mid 90s for the lower deserts.

For Monday through Wednesday, a low pressure system will move
toward the California coast and inland into California with
continued model differences with the timing as well as with the
weakening that may occur as it moves inland. For southwestern
California, it will be cooler and breezier. NBM chances for
measurable precipitation remain less than 20 percent and are
greatest for late Monday night into Tuesday morning.

&&

.AVIATION...
160930Z...Coast...Patchy low clouds will gradually increase through
16Z with bases around 1000-1600 feet MSL, but cigs still random and
intermittent. Any cigs will scatter out 16-17Z.

Valleys/Mountains/Deserts...Strong southwest to west winds are
expected 18-06Z with gusts up to 30 to 40 knots. MOD up/downdrafts
in lee of mountains, along with local BLDU in deserts. Winds to
shift to offshore (northeast) after 06Z tonight in the coastal
foothills and into the northern Inland Empire, increasing Friday
morning.

Otherwise...BKN high clouds AOA 20000 feet MSL decreasing after 00Z.
VFR conditions expected today through tonight.

&&

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

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory from 11 AM this morning to 2 AM PDT Friday for
     Apple and Lucerne Valleys.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE...MM

NWS San Diego (SGX) Office