Guatay, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

487
FXUS66 KSGX 152055
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
155 PM PDT Tue Apr 15 2025

.SYNOPSIS...

A troughing pattern will continue through Friday, with cooler,
windier and wetter weather. The deep marine layer today will
maintain its presence as well, leading to cloudier skies from the
foothills to the coast. More substantial chances for light rain
showers and high elevation snow will move into the picture
Thursday and Friday. With the exception of the lower deserts, most
areas will see isolated light showers with a storm or two possible
by Friday across northern areas. The weekend into early next week
will feature warmer and brighter conditions.

&&

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

An area of low pressure off the coast will continue the cooler
weather pattern through Thursday. The deep marine layer has
maintained a bold presence into the afternoon today, though
partial clearing is seen near the foothills and the LA County
line. Clouds will continue to slowly clear into the evening,
before moving back into the coastal basin overnight. Just like
this morning, patchy drizzle can be expected on Wednesday morning
for areas west of the mountains. The marine layer will be quite
unchanged in terms of depth, so expect another day of slower
clearing. Temperatures were also lowered slightly west of the
mountains to account for this as well.

The area of low pressure off the coast will move closer to our
region by Wednesday night into Thursday. Hi-res model guidance
shows isolated light showers along and west of the mountains with
rates mainly below one tenth of an inch. This system has decent
lower level moisture but is drier above 700 mb, indicating that a
light showers may fall with around a 10-20% chance of measurable
precipitation. As the low moves over the region on Thursday,
chances increase slightly, with highest chances along the coastal
mountain slopes near 40%. Expect cool weather to take hold by
these two days as well with 60s west of the mountains and highs
lowering into the 70s for the lower deserts. Mountain communities
will be colder as well, with highs struggling to reach 50 degrees.
This system will bring windy conditions to the mountains and
deserts as well. Most of these areas will see wind gusts 30-40 MPH
with local gusts in passes near 50 MPH, locally near 60 MPH in
the Banning Pass.

A deep closed low will plunge southward across the Intermountain
West on Thursday, moving into the Desert Southwest by Friday. A
vorticity maxima eclipses the region during this time, increasing
chances for convection across northern areas. NBM chances for
thunderstorms is around 10-15%. Other areas have a low to moderate
chance in seeing light showers off and on throughout the day with
continued cooler weather and a deep marine layer. Models continue
to agree on the active weather pushing out for the weekend as
zonal flow takes over. This will bring less wind, clouds, and
warmer weather to the area by this weekend and early next week.

&&

.AVIATION...
152000Z....Coasts/Valleys...Low clouds based around 3000ft MSL with
tops near 4000ft continue to hang 20 miles inland, encompassing most
coastal mountains, coastal regions, and inland valleys. VIS
reductions have mostly improved above 6SM, but a few locations in
the Inland Empire remain between 2-4SM. Clouds may linger through
the afternoon and early evening, with some retreating to the
beaches/more direct coastline. Full clearing likely won`t occur
today before they begin to push inland again tonight after 03z
Wednesday with similar inland extent as seen this morning by 08-10z
Wednesday. -DZ once again possible Wednesday morning with similar
VIS restrictions.

.Mountains/Deserts...Periods of FEW-BKN clouds based 20,000ft MSL
through 12z Wednesday. Otherwise, light winds with typical westerly
flow through the mountain passes this evening and overnight.
Stronger west winds develop in the vicinity of the mountains
Wednesday afternoon and evening.

&&

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


&&

.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...APR
AVIATION/MARINE...Zuber