San Diego Weather at Mission Trails, CA

586
FXUS66 KSGX 182042
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
142 PM PDT Tue Mar 18 2025

.SYNOPSIS...
Dry weather will prevail through the rest of week with periods of
onshore and offshore flow. High temperatures will be near to
slightly above average through Saturday with a neutral weather
pattern above. High pressure will begin to make its mark by early
next week, prompting further warming.

&&

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

West winds have come down through the day today with local gusts
in the passes nearing only 15-25 MPH. Scattered clouds across the
inland valleys and foothills continue to dissipate. As the trough
that brought the wind earlier this morning pushes off to the east,
high pressure will move in its place. This will not only bring a
warming trend but also some elevated Santa Ana winds across the
mountains and coastal facing foothills. The winds will mainly be
out of the east, giving San Diego County the greatest chance
(40-65%) of seeing winds over 30 MPH by Wednesday morning,
lessening into the afternoon. All areas except the lower deserts
will warm up around 5 to 10 degrees as well. Chances are moderate
to high that we see temps over 75 degrees across the western
valleys. These highs lower slightly by Thursday as a weak trough
passes over Northern California and light onshore winds return.

Zonal flow aloft takes over by Friday into Saturday with a slight
rebound in temperatures for most areas. The most significant warm
up will be across the lower deserts as a thermal ridge begins to
build in from Mexico. Highs will have a 50-80% chance of reaching
85 degrees or more by this time period. High pressure off the
coast moves over the region by Sunday into early next week,
leading to a warm up for all areas of Southern California. 80s are
likely to make an appearance across the Inland Empire on Sunday
with a low to moderate chance of highs reaching 90 degrees across
the Coachella Valley. The high pressure system will amplify
further by Monday and Tuesday bringing the greatest warming. NBM
brings portions of the Inland Empire around a 40-60% chance of
seeing highs above 90 degrees. Highs for now reflect upper 80s for
the area, but keep an eye on the forecast as this will change in
the coming days.


&&

.AVIATION...
182030Z...Mostly clear skies and unrestricted VIS will prevail
through Wed. Local E-NE winds with gusts 25-35 kt will occur 12Z-21Z
Wed over the mountains and western foothills with MOD UDDFS.

&&

.MARINE...
Northwest winds were decreasing at early afternoon with most gusts
20 knots or less. The Small Craft Advisory was reissued through 3 PM
today due to rough seas 6 to 10 feet and periods of 7 to 9 seconds,
but these seas will lower this afternoon. No additional hazardous
marine conditions are expected late this afternoon through Sunday.

&&

.BEACHES...
Elevated surf of 3-6 feet, with sets to 7 feet will continue this
afternoon, highest in southern San Diego County. The surf will
generate a high rip current risk and hazardous swimming conditions.
The surf will lower by 1-2 feet in most areas Wednesday.

&&

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


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 PM PDT this afternoon for Coastal
     Waters from San Mateo Point to the Mexican Border and out
     to 30 nm-Waters from San Mateo Point to the Mexican Border
     Extending 30 to 60 nm out including San Clemente Island.


&&

$$

PUBLIC...APR
AVIATION/MARINE...Maxwell