National City, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

056
FXUS66 KSGX 280922
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
222 AM PDT Wed May 28 2025

.SYNOPSIS...
Seasonal temperatures will continue today with coastal low clouds
covering much of the valleys early this morning. High pressure
aloft over California will bring warming for Thursday and Friday
with Friday high temperatures as much as 10 to 15 degrees above
average for the Inland Empire. An upper level low pressure system
off the Baja coast could draw some tropical moisture northward and
into the area for the weekend with a chance of showers. There
will be a cooling trend for Saturday through Tuesday with Tuesday
high temperatures as much as 10 to 15 degrees below average for
the mountains.

&&

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

.SHORT TERM (Today through Friday)...
Today should be similar to Tuesday with near seasonal temperatures
and the marine layer remaining near 2500 to 3000 feet deep.
Early morning low clouds will once again coverage most of the
valleys before clearing toward the coast during the morning. High
pressure aloft across California will bring warming for Thursday
and Friday with Friday high temperatures as much as 10 to 15
degrees above average for the Inland Empire. High temperatures on
Friday will range from the lower 70s near the coast to the 90s to
around 100 for the Inland Empire with 102 to 108 for the lower
deserts.

&&

.LONG TERM (Saturday through Tuesday)...
A closed upper level low pressure system off the coast of northern
and central could draw some tropical moisture into the area from
the south during the weekend with a chance of showers. There will
also be a cooling trend for Saturday through Tuesday with Tuesday
high temperatures as much as 10 to 15 degrees below average for
the mountains. High temperatures on Tuesday will range from the
lower to mid 60s near the coast to the upper 60s to mid 70s for
the Inland Empire to the upper 80s and lower 90s for the lower
deserts.

&&

.AVIATION...
280930Z...Coasts/Valleys...Low clouds based 1500-2000 feet MSL will
continue to fill the entire coastal basin by 14Z. Tops to 3000 feet
MSL and vis reduced over higher terrain between those elevations.
Scatter out expected 17-20Z, but with only partial or intermittent
clearing along the immediate coast. Low clouds to push ashore after
00Z and once again fill the coastal basin overnight into Thursday,
with very similar bases, vis, cloud coverage and timing.

Otherwise...mostly clear skies and VFR conditions today and tonight.

&&

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

&&

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