Weather Service Report


069 
FXUS66 KSGX 242102
AFDSGX

AREA FORECAST DISCUSSION
National Weather Service San Diego CA
202 PM PDT FRI JUN 24 2016

.SYNOPSIS... 
High pressure aloft will continue to bring above normal temperatures
through the middle of next week. Night and morning marine layer
clouds this weekend will retreat back to the coast each afternoon.
Hot weather will return early next week as the high pressure zone
strengthens over the Four Corners region. A monsoonal flow pattern
may trigger scattered afternoon thunderstorms over the mountains.

&&

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

A strong marine inversion and a coastal eddy will help to generate
a lot of coastal stratus tonight through Saturday morning. Clouds
will be quick to clear the inland valleys Saturday morning but
likely to persist into early afternoon near the beaches, similar
to this morning. Upper level high pressure will strengthen near
the 4 Corners on Sunday and bring warmer temps to Socal. High
pressure ridge will elongate across South-central California
Sunday through mid next week. This will likely bring the most
anomalously hot temperatures to our deserts and northern
mountains. Meanwhile monsoonal flow will develop by Sunday due to
circulation around the high and subtropical moisture over Northern
Mexico.

Temperatures will reach up to 10 to 15 degrees above normal during
this "mini heatwave" event. The hottest days look to be Monday and
Tuesday with temperatures 110-115 in the lower deserts and 105-110
in the high deserts. Scattered afternoon and evening thunderstorms
will be possible each day over the mountains and possibly along
the desert slopes. There will also be a slight risk for dry
thunderstorms due to very dry low levels. 

High pressure is progged to weaken after Wednesday next week, with
temperatures remaining slightly above normal through the end of
next week. Monsoonal flow should also diminish after Wednesday. A
heat advisory has been issued for all inland areas and the
mountains below 6000 feet, for Sunday through Wednesday.

&&

.AVIATION...
241959Z...Coast/Valleys...through 25/0000 UTC, BKN-SCT clouds AOA
1100-2000 ft msl likely lingering near the coast, with primarily
unrestricted vis and SKC elsewhere. 25/0000-1500 UTC, stratus re-
developing 15-20 SM inland with a strengthening coastal eddy.
Expecting bases 800-1500 ft msl, tops around 1500-2000 ft msl, areas
of vis 3-5 SM and local vis AOB 1 SM along higher coastal
terrain/mesas. Forecast confidence is moderate. Stratus clearing
back to the coast 25/1500-1800 UTC.

Mountains/Deserts...Clear skies with unrestricted vis will continue
through Saturday morning.

&&

.MARINE...
1259 PM...No hazardous marine weather is expected through Wednesday.

&&

.BEACHES...
1259 PM...Latest nearshore buoy reports show a 5 foot/17-18 second
south swell bringing high surf of 5-8 ft to Orange county beaches
and elevated surf of 3-6 ft with sets to 8 ft to San Diego county
beaches. South swells will continue to move in through Saturday,
continuing the high surf in Orange county, along with strong rip and
longshore currents Friday through the weekend. A High Surf Advisory
remains in effect through Sunday for Orange county. Due to the angle
of the swells, most of the beaches in San Diego county are not
expected to receive the best energy from this swell, so mainly
elevated surf of around 4-7 ft with locally higher sets in Northern
San Diego county is expected starting Friday. The Beach Hazards
Statement for San Diego county continues through Sunday. Swells and
surf will start to lower on Sunday.

&&

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


&&

.SGX Watches/Warnings/Advisories...
CA...Heat Advisory from 2 PM Sunday to 8 PM PDT Wednesday for Apple 
     and Lucerne Valleys-Coachella Valley-Riverside County 
     Mountains-San Bernardino County Mountains-San Bernardino 
     and Riverside County Valleys-The Inland Empire-San Diego 
     County Deserts-San Diego County Mountains-San Gorgonio Pass 
     Near Banning.

     Beach Hazards Statement through Sunday evening for San Diego 
     County Coastal Areas.

     High Surf Advisory until 8 PM PDT Sunday for Orange County 
     Coastal Areas.

PZ...None.
&&

$$

PUBLIC...Brotherton
AVIATION/MARINE...Harrison

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Western Regional Climate Center, wrcc@dri.edu