Poway, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

822
FXUS66 KSGX 062013
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
113 PM PDT Sun Apr 6 2025

.SYNOPSIS...
Warm and fair weather will prevail through the week. Areas of low
clouds and fog may return to the coastal areas by Monday morning.
Inland highs will be 10 to locally 20 degrees above normal
Wednesday through Friday. Cooler next weekend, though it is
uncertain how much cooling will occur.

&&

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

This afternoon...Under sunny skies, temperatures are generally
higher than at this time yesterday, with some mountain locations
10-15 degrees higher. Weak offshore pressure gradients continue to
trend onshore. With the flow turning onshore, high-resolution
ensemble models show a 40-60 percent chance of low clouds and fog
in the coastal areas between 5 am and 10 am Monday.

From previous discussion...
For Monday and Tuesday...Inland temperatures continue the upward
trend while the upper level ridge weakens in response a low
pressure trough moving inland to the north. The resulting onshore
flow and the return of the marine layer will moderate temperatures
in the coastal areas and western portions of the inland valleys.
Daytime temperatures will range from the upper 60s at the beaches to
the low 80s in the inland valleys. The upper deserts will be in
the upper 70s to lower 80s and the lower deserts will be in the
low to mid 90s.

For Wednesday through Friday...A large-amplitude ridge of high
pressure builds over the western states. This will bring
significantly warmer conditions and a reduction in the marine
layer presence, limiting the nocturnal low clouds and fog to the
immediate coastal areas. Thursday will likely be the warmest day,
with daytime high temperatures in the low 90s for portions of the
inland valleys and upper deserts. High temperatures in the lower
deserts will be near 100 degrees at some locations. The national
Blend of Models shows a 55-90 percent chance of 100 degrees or
more on Thursday in the lower deserts. It also shows a 70-90
percent chance of 90 degrees or higher in the IE and upper
deserts. Except for the lower deserts where temperatures could be
a little higher, Friday will not be quite as warm as the upper
level ridge begins to shift eastward and heights/thicknesses begin
to lower as a trough of low pressure approaches from the
northwest.

The trough will take control of SoCal weather for next weekend,
bringing stronger onshore flow with more clouds and lower
temperatures. By next Sunday, temperatures west of the mountains
will be back down to the 60s and 70s. In the high deserts,
temperatures will be back down to the 70s and in the lower deserts
the upper 80s to near 90. There is still significant uncertainty
in the forecast details for the weekend due to the spread in the
ensemble member solutions.

&&

.AVIATION...
061930Z...VFR and clear skies prevail today with typical afternoon
seabreeze. Patchy low clouds and FG develop tonight after 08-10z
with slightly more coverage than has been seen the past several
days. Bases around 400-900ft MSL with tops to 900-1300ft MSL. There
is a 40-60% chance for a CIG or VIS restriction for at least an hour
at KSAN between 12z-16z, with a 30-40% chance for KCRQ and a 40-55%
chance at KSNA for the same time period. Localized areas of FG with
VIS down to 2-3SM possible for the coasts and western valleys,
especially coastal terrain. Any low clouds/FG that do develop will
generally clear to the beaches by 16z Monday, with full clearing by
18-20z.

&&

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

&&

.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...Zuber