Irvine, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

786
FXUS66 KSGX 132017
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
117 PM PDT Fri Jun 13 2025

.SYNOPSIS...
Temperatures expected to fluctuate between periods of warming and
cooling into next week. Overall, temperatures will stay 5 to 10
degrees above average at their warmest and around 5 degrees above
average at their coolest. Night and morning low clouds and fog can
be expected each day and will reach into portions of the valleys.
Slight increase in westerly winds expected over the mountains and
into the deserts early in the upcoming week.

&&

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

At 1 PM, low clouds had cleared from inland areas but are continuing
to linger along area beaches. Low confidence in complete clearing at
the beaches this afternoon, with partial and intermittent clearing
most likely. Low clouds and fog are expected to remain persistent
each night and morning for the coast and into portions of the
valleys into next week.

High pressure will build from the south this weekend bringing an
increase in high temperatures, peaking on Sunday. Highs Saturday
will be 3 to 5 degrees warmer than today. By Sunday, high
temperatures will be around 5 degrees above average near the coast
and 10 degrees above average further inland. NBM chances for the low
desert to exceed 115 degrees on Sunday is around 15 percent, with an
over 90 percent chance of high exceeding 110 degrees. West of the
mountains, there is a 50 to 80 percent chance of portions of the
Inland Empire exceeding 100 degrees and a 30 to 50 percent chance
portions of eastern San Diego County valleys exceeding 100 degrees
Sunday. Portions of inland Orange County (east of Interstate 5) have
a 30 to 50 percent chance of temperatures exceeding 90 degrees.

A low pressure system moving inland through California on Monday
will strengthen onshore flow for Monday and Tuesday. This will
result in a slight increase in westerly winds over the mountains and
into the deserts. In addition, slight cooling will spread inland on
Monday and Tuesday. By Tuesday high temperatures will be around 5
degrees above average. Wednesday will see a few degrees of warming
as the ridge rebounds in the wake of the passing trough with cooler
conditions expected Thursday and Friday as a stronger, deeper trough
digs into the Pacific Northwest.

&&

.AVIATION...
132000Z....Coast/Valleys...Low clouds based around 1200-1700 feet
MSL will continue to linger along the immediate coast through the
day. Low clouds will begin their move inland after 23Z, lowering to
600-1000 ft MSL this evening, then locally into inland valleys by
early Saturday, with vis reduced 0-5 SM between these levels.
Clearing Saturday morning 15-16Z inland and 17-19Z for the coast,
with some patchy low clouds lingering along the immediate coast but
better overall clearing than today.

Otherwise...SCT high clouds and unrestricted vis today and tonight.

&&

.MARINE...
No hazardous marine conditions are expected today through Wednesday.

&&

.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...CO
AVIATION/MARINE...CSP