Severe Thunderstorm Warning 10, NWS San Diego, CA

144 
WWUS56 KSGX 152234
SVSSGX

Severe Weather Statement
National Weather Service San Diego CA
334 PM PDT WED AUG 15 2018

CAC065-152300-
/O.CON.KSGX.SV.W.0010.000000T0000Z-180815T2300Z/
Riverside CA-
334 PM PDT WED AUG 15 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT
FOR RIVERSIDE COUNTY...

At 331 PM PDT, thunderstorms were along a line from just east of 
Idyllwild southeast to Pinyon Pines, along Highway 74. Thunderstorms 
had weakened somewhat since 315 PM but could still restrengthen 
before 400 PM.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Idyllwild-Pine Cove, Anza, Highway 243 Between Banning And 
Idyllwild, Mt San Jacinto State Park, Highway 74 Between Anza And 
Palm Desert, Highway 74 Between Mountain Center And Anza, Mountain 
Center, Lake Hemet, Cahuilla Indian Reservation and Santa Rosa 
Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3355 11682 3386 11681 3381 11656 3355 11645
TIME...MOT...LOC 2231Z 316DEG 8KT 3359 11657 

HAIL...1.00IN
WIND...60MPH
 
$$

Maxwell

738 
WWUS56 KSGX 152254
SVSSGX

Severe Weather Statement
National Weather Service San Diego CA
354 PM PDT WED AUG 15 2018

CAC065-152303-
/O.EXP.KSGX.SV.W.0010.000000T0000Z-180815T2300Z/
Riverside CA-
354 PM PDT WED AUG 15 2018

...THE SEVERE THUNDERSTORM WARNING FOR RIVERSIDE COUNTY WILL EXPIRE
AT 400 PM PDT...
    
The severe thunderstorm which prompted the warning has weakened.
While scattered thunderstorms were continuing as of 350 PM, they 
will likely remain below severe limits between 400 PM and 430 PM. 
Therefore, the warning will be allowed to expire.

LAT...LON 3355 11682 3386 11681 3381 11656 3355 11645
TIME...MOT...LOC 2253Z 316DEG 8KT 3356 11654 

$$

Maxwell

Area Forecast Discussion
National Weather Service San Diego CA
127 PM PDT Wed Aug 15 2018

.SYNOPSIS...
Monsoonal moisture will increase through Thursday with increasing
chances for afternoon and early evening thunderstorms in the
mountains and deserts. High pressure aloft will move westward and
over Southern California for Friday through Sunday bringing drying
and a warming trend. Minor intrusions of monsoonal moisture may
return next week as high pressure moves back to the east. Areas
of night and morning low clouds and fog will continue for coastal
areas.

&&

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

Coastal low clouds cleared later today and not completely from San
Diego. Thunderstorms are getting going, starting over the
mountain crests. A few of these could get nasty before the day is
done, but will stay mostly confined to the mountains. A little
more moisture Thursday in easterly flow will combine with the
high instability already present to bring more thunderstorms to
the mountains and deserts, and even could help a couple
thunderstorms drift west of the mountains into inland valleys.
The tenacious nature of the coastal clouds and model guidance
suggest the marine layer to be largely unfazed by this latest
monsoon push, and maintains night and morning coastal clouds
getting into westernmost valleys each night. The monsoon flow
backs off on Friday for fewer thunderstorms in the mountains and
deserts. High pressure aloft strengthens a bit this weekend while
the monsoon flow backs off. That will mean higher temperatures
and a shallower marine layer, but no thunderstorms. Next week
models show some increase in monsoonal moisture, but not very
convincing to forecast much chance of thunderstorms until Tuesday
and Wednesday. The high breaks down slightly as well, so it
doesn't appear as hot but probably more humid. Overall, minor ebbs
and flows in monsoon flow, slight variations in marine layer and
coastal cloud extent, and minor fluctuations in temperatures. In
other words, seasonal summer weather.

&&

.AVIATION...
151900Z...Coasts/Valleys...SCT-BKN15-020 near the coast this
afternoon becoming OVC015-020 through 04Z and moving 20 miles inland
through 16Z Thursday. From 16-21Z...gradual clearing back to the
coast.

Mountains/Deserts...Scattered TSRA over the mountains between 20-03Z
with some storms moving into the upper deserts near Victorville and
Barstow. Reduced vis in heavy rain, and gusty sfc winds 30-40 kt
near storms.

&&

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

&&

.BEACHES...
Beach Hazard Statement through Friday for above average surf and
strong rip currents. A southern hemisphere 180 degree, 4 ft swell at
17 seconds will arrive this evening and bring elevated surf and
strong rip currents tonight through Friday. The surf will peak
Friday at 3-6 ft with sets to 8 ft on southwest facing beaches, then
slowly subside Saturday and Sunday.

The surf and swell will peak Friday, then slowly decrease Saturday
and Sunday.

&&

.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 9 PM PDT this evening through
     Friday evening for Orange County Coastal Areas-San Diego
     County Coastal Areas.

PZ...NONE.

&&

PUBLIC...MM
AVIATION/MARINE/BEACHES...Moede