Corona del Mar, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

168
FXUS66 KSGX 272023
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
123 PM PDT Sun Apr 27 2025

.SYNOPSIS...
Cool and cloudy weather with isolated showers bringing light rain
and mountain snow will continue through today. Breezy southwest to
west winds over the desert slopes into the deserts will peak this
afternoon and early evening, before calming overnight. Dry, warmer
weather with the usual marine layer low clouds each night and
morning will follow through most of next week. Temperatures cool
off again as we approach next weekend, with a deeper marine layer.

&&

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

.SHORT TERM...
The upper low pressure system that brought yesterday`s wet and
windy weather is currently moving east out of northeast Nevada.
Showers have mostly tapered off at this point, though there are
few isolated ones lingering, mostly offshore. Precipitation
totals since rain started are from a few hundredths of an inch to
about a third of an inch for coastal and valley locations (with a
few spots in Orange County receiving up to 0.40"), a few
hundredths of an inch in the western high desert, and about a
quarter inch to an inch of rain (or liquid equivalent above the
snow line) for the mountains. Meanwhile, west to southwest winds
have become breezy over the mountains (mostly the desert slopes)
into the deserts, though not nearly to the extent of
yesterday`s winds, with intermittent gusts up to 50 mph through
the particularly wind-prone passes (like the Banning Pass). Winds
taper off this evening and then calm overnight.

Late this afternoon through the evening, isolated showers could
develop over the mountains. Snow levels will be rising through the
day from about 5000 feet this morning to 6000 to 7000 feet late
this afternoon, so any snow showers will generally be restricted
to the peaks. A few showers popping up again over San Diego
County coastal areas/valleys are also not out of the question
late in the evening through early morning Monday, with about a 10%
chance for this to occur. Any showers will continue be light,
resulting in a few hundredths of precipitation for areas they
cross. Any last shower(s) will taper off by mid-morning Monday as
the upper low continues to move eastward and the atmosphere aloft
dries out behind it.

Weaker troughing/low pressure aloft will continue to linger over
the region Monday and part of Tuesday, keeping temperatures 5 to
10 degrees below average Monday. Despite that, afternoon high
temperatures Monday will be noticeably warmer than today away from
the immediate coast, where warming will be less significant, and
skies will be much clearer in the afternoon. This trend will
continue Tuesday, and afternoon high temperatures will warm to
near normal region-wide, plus/minus a few degrees. Not much
difference Wednesday compared to Tuesday as weak ridging aloft
hangs in there for most of the day. Winds will be fairly sedate
early next week, with average springtime afternoon and evening
breezes. Marine layer low clouds will develop at least in areas
each night and morning, though they`ll be shallower and closer to
the coast in extent both Monday night through Tuesday morning and
Tuesday night through Wednesday morning.

&&

.LONG TERM...Thursday May 1 through Sunday May 04...
A weak low aloft moves into southern California early Thursday
morning, which will deepen the marine layer and could result in
some patchy drizzle out of it Thursday morning, but otherwise
won`t have much affect on temperatures or winds Thursday.
Temperatures will then gradually cool each day Friday through the
end of the week as the weak low gets pushed out by a stronger
system approaching from the northwest. Nightly and morning low
clouds will continue to deepen and get further inland overnight
through the end of the week.

Ensembles are in pretty good agreement with regards to a stronger
trough moving down the west coast into California Saturday into
Sunday, but clustered 500 mb heights have differences in specific
positioning and strength of the trough, which will affect degree
of cooling, strength of winds, and precipiation. Temperatures
nonetheless are expected to be slightly below average Friday,
then increasingly below average Saturday and Sunday.
Afternoon/evening breezes will likely strengthen slightly from
Thursday to Friday, with stronger winds over the mountains and
deserts Saturday and Sunday. Model ensembles continue to show
pretty good agreement in precipitation around Sunday into early
next week, but amounts look quite light.

&&

.AVIATION...
272012Z....Coasts/Valleys/Coastal Mountain Slopes...SCT-BKN clouds
with bases 3000-6000 ft MSL through this evening with higher terrain
locally obscured. Local VIS 3-5 miles and local BKN-OVC bases 2000-
3000 ft MSL in -SHRA but most VIS will remain unrestricted below the
clouds. After 06Z Mon, BKN-OVC with bases around 1500-2500 ft MSL
will fill in again.

Mountains/Deserts. through 20Z Sun...Occasional west winds with
gusts 20-35 kt will continue through this evening, mainly from the
mountain crests east through the desert mountain slopes and locally
into the deserts, including below mountain passes. SCT -SHRA/-SHSN
will occur in the mountains with occasional mountain obscurations in
clouds. Some clearing will occur this evening and SHRA/SHSN will
continue to taper off overnight into early Monday morning.

&&

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

&&

.BEACHES...
Elevated surf of 3 to 6 feet with sets to 7 feet will occur through
Wednesday. Highest surf will occur on south facing beaches. Strong
rip currents are expected.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Wednesday evening for Orange
     County Coastal Areas.

PZ...None.

&&

$$

PUBLIC...CSP
AVIATION/MARINE...Small