Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 210314
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
814 PM PDT Thu Jul 20 2017

.SYNOPSIS...
A high pressure ridge will bring seasonally hot inland weather
through the weekend. A weak surge of monsoonal moisture early next
week could produce a few afternoon thunderstorms over the
mountains Monday and Tuesday.

&&

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

A few brief showers developed in southeast San Diego County this
afternoon, but for most of us skies were clear and dry this
afternoon and evening. As we watch those clouds fade in the east,
we can watch the coastal clouds gather in the west. Tonight will
feature clear skies except for a more uniform and extensive
coverage of coastal clouds, although the clouds won`t reach the
inland valleys. No more showers for a while as our atmosphere
continues to dry out through Friday. High pressure aloft will
build westward into Nevada this weekend to bring above average
temperatures. Saturday looks like the warmest day with max temps
in the 90s in the Inland Empire, low 100s in the high desert and
close to 110 in the low desert. Monsoon moisture begins to
increase again over the weekend, streaming underneath that Nevada
high. By Monday the moisture and instability appear just enough to
produce a few thunderstorms mainly in the mountains Monday and
Tuesday. A trough in the Northwest nudges the ridge aside next
week and sends the monsoon moisture with it. That would bring us
back to seasonal weather and dry everywhere.

&&

.AVIATION...
210300Z...Coast/Valleys...Areas of stratus will continue to develop
near the immediate coast through 04Z, then reach most coastal
airports 04Z-08Z, spreading up to 20 miles inland overnight. Bases
will be 900-1300 ft MSL with tops to 1500 ft MSL. Local vis 3-5
miles will occur 08Z-16Z. Most areas will clear 15Z-17Z Fri, with
stratus developing again Fri evening.

Mountains/Deserts...Local surface gusts over 25-35 knots from the
west will occur this evening and again Fri late afternoon/evening on
desert mountain slopes and through San Gorgonio Pass. Otherwise,
mostly clear skies with unrestricted vis will prevail through Friday
night.

&&

.MARINE...
No hazardous marine weather is expected through Tuesday.

&&

.BEACHES...
High tides will reach near or above 7 feet during the mid-to-late
evenings each day Friday through Sunday. This could result in
minor tidal overflow at low-lying beach areas during times of high
tide. A Beach Hazards Statement has been issued.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement from Friday afternoon through Sunday
     evening for Orange County Coastal Areas-San Diego County
     Coastal Areas.

PZ...NONE.

&&

$$

PUBLIC...MM
AVIATION/MARINE/BEACHES...Maxwell



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