Severe Thunderstorm Warning 11, NWS San Diego, CA

AREA FORECAST DISCUSSION...CORRECTED TIME
NATIONAL WEATHER SERVICE SAN DIEGO CA
830 AM PDT FRI AUG 30 2013

.SYNOPSIS...
VERY WARM AND HUMID AGAIN TODAY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. HEAVIEST STORMS ARE EXPECTED INLAND...CLOSER TO THE
MOUNTAINS AND FOOTHILLS. LOCALLY HEAVY RAIN AND FLASH FLOODING IS
POSSIBLE. A FEW THUNDERSTORMS MAY DRIFT WEST OF THE MOUNTAINS AS
WELL. FOR THE BALANCE OF THE HOLIDAY WEEKEND...HUMIDITY WILL REMAIN
A FACTOR...BUT BETTER ONSHORE FLOW SHOULD ALLOW FOR AREAS OF
LOWER...NOCTURNAL CLOUDS AND FOG TO REDEVELOP WEST OF THE MOUNTAINS.
THUNDERSTORM ACTIVITY WILL BECOME INCREASINGLY ISOLATED AND CONFINED
TO THE MOUNTAINS AS WELL. CONTINUED SEASONALLY WARM IN A MODIFIED
MONSOONAL FLOW THROUGH NEXT WEEK WITH A CHANCE FOR ISOLATED MOUNTAIN
AND DESERT THUNDERSTORMS.

&&

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

VERY HEAVY RAINFALL AND LOCAL FLASH FLOODING STILL A CONCERN FOR
LATER TODAY...

SATELLITE IMAGERY EARLY THIS MORNING SHOWS CONSIDERABLE CLOUDINESS
ACROSS SOCAL AND NW MEXICO...BUT ABSENT THE TSTMS/SHWRS OF YESTERDAY
MORNING. THERE IS NO ABSENCE OF PW THOUGH. THE 12Z MIRAMAR
SOUNDING HAD A REMARKABLE 2.23 INCHES. WINDS IN THE MID-LEVELS
CONTINUED FROM THE EAST AT AROUND 15 KTS AND WERE SE AT 10-15 KTS
BELOW 5K FT. TEMPERATURES WERE OFF AND RUNNING. ASIDE FROM THE
HIGHER ELEVATIONS...80S WERE COMMON BY 8 AM. SFC PRESSURE GRADIENTS
WERE WEAK OFFSHORE...AND MARINE CLOUDS WERE WELL OUT TO SEA BEYOND
OUR COASTAL WATERS.

WENT AHEAD AND INCREASED TEMPERATURES WEST OF THE MOUNTAINS WELL
INTO THE 80S NEAR THE COAST AND CLOSE TO THE CENTURY MARK OVER THE
INLAND EMPIRE. SFC DEWPOINTS ARE ELEVATED...SO IT WILL FEEL QUITE
WARM THIS MORNING BEFORE THE WINDS BEGIN TO STIR. ALSO...EXPANDED
THE FLASH FLOOD WATCH BACK INTO THE VALLEYS...TO INCLUDE THE INLAND
EMPIRE. DUE TO THE EASTERLY TRANSPORT WINDS AND HIGH DEWPOINTS...A
FEW THUNDERSTORMS MAY DEVELOP OR DRIFT INTO THESE AREAS. FOR THE
BALANCE OF THE HOLIDAY WEEKEND WE ARE EXPECTING TO SEE PWS GRADUALLY
DECREASE BUT HUMIDITY WILL REMAIN A FACTOR EVERYWHERE. THE
THUNDERSTORM THREAT SHOULD SHRINK BACK TO THE MTNS/DESERTS AS UPPER
FLOW BECOMES MORE SOUTHERLY.

BROAD HIGH PRESSURE OVER THE CENTER OF THE COUNTRY WILL REMAIN IN
CONTROL OF OUR WEATHER INTO NEXT WEEK. A WEAK EASTERLY WAVE/TROUGH
WILL MOVE ACROSS THE AREA LATER TODAY HELPING TO SHIFT MID/UPPER
LEVEL FLOW MORE FROM THE SOUTH. THIS SHOULD ALLOW SOME DRYING
ALOFT...HOWEVER THERE WILL STILL BE PLENTY OF LOW-LEVEL MOISTURE
AROUND FOR AREAS OF CLOUDS/FOG TO DEVELOP WEST OF THE MTNS. THE FLOW
REMAINS ESSENTIALLY FROM THE SOUTH WELL INTO NEXT WEEK...SO
OCCASIONAL INCURSIONS OF MONSOONAL MOISTURE ARE POSSIBLE ALONG WITH
ISOLATED MTN/DESERT TSTMS.

IT WILL REMAIN QUITE WARM INLAND AS HEIGHTS/THICKNESS REMAIN
ELEVATED...BUT THE SEA BREEZE SHOULD BECOME STRONGER THROUGH THE
WEEK...HOLDING COASTAL AREAS CLOSER TO AVERAGE...WITH OCCASIONAL
NIGHT/MORNING CLOUDS/FOG.

&&

.AVIATION...
291515Z...SCT-BKN CLOUD LYRS BETWEEN 10000-25000 FT MSL. AFTER 1800
UTC UNTIL 31/0600 UTC...SCT SHOWERS AND ISOLD TSTMS WITH BASES 8000
FT MSL AND TOPS TO FL450 FORMING AND MOVING WEST-NORTHWESTWARD FROM
DESERTS TO COASTAL AREAS AND OFFSHORE. VSBY AOB 2SM IN +SHRA. .

&&

.MARINE...
PLAN TO ISSUE MARINE WEATHER STATEMENT SHORTLY...VALID 1100-2300 PDT
TODAY/TONIGHT...FOR THREAT OF ISOLATED THUNDERSTORMS MOVING WESTWARD
FROM COAST TO 30-40NM OFFSHORE.
&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE 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 DIEGO
     COUNTY VALLEYS.

PZ...NONE.

&&

PUBLIC...JAD
AVIATION/MARINE...BALFOUR

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
545 AM PDT FRI AUG 30 2013

CAZ042-043-057-311200-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SANTA ANA MOUNTAINS AND FOOTHILLS-
545 AM PDT FRI AUG 30 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED SHOWERS AND THUNDERSTORMS...WITH LOCALLY HEAVY RAIN
POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...
HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT
WEATHER CONDITIONS.

CAZ048-050-311200-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-
545 AM PDT FRI AUG 30 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING TODAY WITH LOCALLY
HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS LIKELY TODAY.

CAZ055-056-058-060>062-311200-
SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
545 AM PDT FRI AUG 30 2013

...FLASH FLOOD WATCH IN EFFECT FROM 11 AM UNTIL 11 PM PDT TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAIN AND FLASH FLOODING
POSSIBLE. A FLASH FLOOD WATCH IS IN EFFECT THIS AFTERNOON AND
EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SCATTERED SHOWERS AND THUNDERSTORMS...WITH LOCALLY HEAVY RAIN ON
SATURDAY. SMALLER CHANCE OF AFTERNOON AND EARLY EVENING
THUNDERSTORMS SUNDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS LIKELY TODAY.

MOEDE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1135 AM PDT FRI AUG 30 2013

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     FLASH FLOOD      7 N BIG BEAR CITY       34.37N 116.86W
08/29/2013                   SAN BERNARDINO     CA   TRAINED SPOTTER

            REPORTED MAJOR FLOODING IN DRY WASHES AND
            DEBRIS REMOVAL REQUIRED ON HIGHWAY 18
            TOWARDS BIG BEAR AT INTERSECTION OF CAMPO
            ROAD. WATER AS DEEP AS 2 FEET IN PLACES.
            FLASH FLOOD DURATION 3 HOURS

&&

IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1141 AM PDT FRI AUG 30 2013

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     FLASH FLOOD      15 E APPLE VALLEY       34.51N 116.95W
08/29/2013                   SAN BERNARDINO     CA   TRAINED SPOTTER

            2 1/2 MILES OF ROUTE 247 REQUIRED MUD AND
            DEBRIS REMOVAL BY HEAVY EQUIPMENT. RESIDUAL
            MUD AS DEEP AS 4 INCHES. WATER REPORTED
            FLOWING OVER THE ROADWAY. TIME ESTIMATED.
            FLASH FLOOD DURATION 2 HOURS

&&

IRIS SYSTEM