Mentone, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

224
FXUS66 KSGX 190407
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
907 PM PDT Fri Apr 18 2025

.SYNOPSIS...
Showers tapering off this evening, moving off to the east by
midnight. After a cloudy, cool, and breezy day today, dry and
warmer conditions are on tap for the weekend into early next week,
with high temperatures near to around 5 degrees above average by
Monday. Gradual cooling follows Tuesday through Friday.

&&

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

This evening...a few showers are lingering, mostly over the mtns
and desert slopes but they are quickly moving east and
dissipating. Showers should end by midnight. Sfc pressure
gradients are still onshore to the east and the low pressure
system moving southeast into AZ continues to bring locally strong
winds to the mtn passes and adjacent desert areas. In the last
hour, the wind- prone locations have reported wind gusts as strong
as 45-55 mph.

From previous discussion...
A large low pressure system over the Inter-Mountain West will
continue the cool, cloudy and breezy conditions into early
Saturday. Skies will at least partially clear tonight as a weak
ridge starts to build in. Mostly clear skies with warmer high
temperatures near normal for the coastal areas and up to 5 degrees
below for inland areas follow Saturday. Seasonally average
afternoon breezes are expected, with a stronger sea breeze than
previous days. Some patchy low clouds will develop near the coast
overnight Saturday into Sunday, but mostly clear skies will
predominate for most areas.

Temperatures will continue to rise Sunday and Monday, and high
temperatures will be near normal for coastal regions and about 5
degrees above average for inland areas by Monday. Coastal areas
cool off slightly Tuesday, and the cooling trend spreads inland
Wednesday through Friday, with overnight and morning low clouds
and patchy fog that will gradually get slightly deeper and further
inland towards mid-week. Afternoon high temperatures will be back
to 5-10 degrees below average for this time of year by the late
week.

Ensemble weather models are in good agreement through next
Saturday, with differences in the placement of an upper low
pressure after that. A minority of model outputs indicate
precipitation around Sunday-Monday, while the majority keep us dry
if cooler than average.

&&

.AVIATION...
180340Z....Coasts/Valleys/Foothills...BKN-OVC cigs near 3000-4000
feet will continue this evening, beginning to scatter after 10Z
tonight, especially at coastal TAF sites. Higher terrain continuing
to be obscured in FG up to 8000 feet until 13-15Z Fri. Mostly clear
conditions expected by later Friday morning into the afternoon. FEW-
SCT clouds near 3,000 ft MSL possible near the coast Friday night.

Higher Mountains/Deserts...SCT-BKN clouds near 100K ft MSL through
08Z across the lower deserts, with clearing for all thereafter.
Westerly winds will continue to diminish through the evening,
becoming lighter overnight. Winds shifting NE by 12Z Fri with gusts
near 30kts at times along coastal slopes of Orange / SBD Counties
until 21Z Fri.

&&

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

&&

.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...PG
AVIATION/MARINE...APR