155
FXUS66 KSGX 241126
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
426 AM PDT Mon Jun 24 2024

.SYNOPSIS...
Gradually cooler for the coast and valleys into the middle of the
week with slight cooling for the deserts for late in the week.
There is a slight chance of showers and thunderstorms for the
mountains into the high desert for this afternoon and early
evening with lesser chances for Tuesday afternoon. Drier and
warmer for next weekend.

&&

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

.SHORT TERM (Today through Wednesday)...
High temperatures for the coast and valleys will cool a few to
around 5 degrees each day for today and Tuesday with only slight
additional cooling for Wednesday through Friday. Cooling for the
deserts will be much less, only a few degrees with the relatively
cooler days some time around Thursday and Friday and possibly
Saturday.

The convection on Sunday afternoon and early evening was mostly
along convergence boundaries in the mountains and into the high
desert. The same basic pattern will hold for today and Tuesday,
but with decrease coverage and chances as moisture decreases.

While there will continue to be few, if any, high temperature
records tied or broken, there could once again be several records
tied or broken for warmest daily minimum temperatures for today
and again Tuesday. On Sunday, there were records broken for
warmest minimum temperature for 11 locations with a tie at one
more location.

Some patchy night and morning low clouds may return some time
around the middle of the week.

&&

.LONG TERM (Thursday through Sunday)...
Toward the end of the week, NBM has the greatest warming for the
coast and valleys on Saturday and for the deserts on Sunday with
the greatest spread in the high temperature guidance for the
weekend into early next week for the valleys with narrower spread
for the deserts. The Excessive Heat Warning for the deserts
continues through Thursday. The slight decrease in Heat Risk for
the lower deserts on Friday and Saturday is mostly due to drying
of lower level moisture and resulting nights that aren`t quite as
warm.

&&

.AVIATION...
240845Z...Coast/Valleys...FEW-SCT clouds at/above 10,000 ft MSL and
unrestricted vis through this evening. There is a 20-40 percent
chance of low clouds with bases 1000 ft MSL or less developing along
the San Diego County coast after 09Z Tue.

Mountains/Deserts...There is a 15-20 percent chance of TSRA over the
San Bernardino Mountains and portions of the high desert this
afternoon, with CB bases near 10,000 ft MSL and tops to 25,000 ft
MSL. Gusty outflow winds and reduced vis in RA VCTY TSRA. Otherwise
FEW-SCT clouds at/above 10,000 ft MSL and unrestricted vis through
Tue night.

&&

.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...Excessive Heat Warning until 8 PM PDT Thursday for Apple and
     Lucerne Valleys-Coachella Valley-San Diego County Deserts-
     San Gorgonio Pass Near Banning.

PZ...None.

&&

$$

PUBLIC...17
AVIATION/MARINE...SS