Severe Thunderstorm Warning 14, NWS San Diego, CA

238 
WWUS56 KSGX 282243
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
343 PM PDT SUN AUG 28 2011

CAC073-282252-
/O.EXP.KSGX.SV.W.0014.000000T0000Z-110828T2245Z/
SAN DIEGO CA-
343 PM PDT SUN AUG 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SAN DIEGO COUNTY
WILL EXPIRE AT 345 PM PDT...

THE THUNDERSTORM HAS DISSIPATED. STRONG THUNDERSTORMS MAY CONTINUE 
TO DEVELOP IN THE AREA WITH SMALL HAIL AND HEAVY RAIN. 

LAT...LON 3259 11659 3267 11657 3273 11650 3270 11640
      3261 11636 3258 11644 3257 11653
TIME...MOT...LOC 2242Z 046DEG 6KT 3257 11655

$$

SGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
150 PM PDT SUN AUG 28 2011

.SYNOPSIS...
ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE
THROUGH THE EVENING HOURS OVER THE MOUNTAINS AND DESERTS AS WELL AS
POTENTIALLY TO PORTIONS OF THE INLAND EMPIRE.  HOWEVER...A TROUGH OF
LOW PRESSURE WILL DIG OVER THE WEST COAST THIS WEEK...BRINGING
COOLER AND DRIER CONDITIONS TO SOUTHERN CALIFORNIA.  A PATCHY MARINE
LAYER WILL RETURN OVERNIGHT TONIGHT...DEEPENING THROUGHOUT THE WEEK.

&&

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

WATER VAPOR IMAGERY CONTINUES TO SHOW A TROUGH OF LOW PRESSURE
MOVING ACROSS OREGON THIS AFTERNOON...WHICH IS HELPING TO SLOWLY
SHIFT THE RIDGE OF HIGH PRESSURE EASTWARD.  HOWEVER...SOUTHERN
CALIFORNIA REMAINS PREDOMINATELY UNDER THE RIDGE THIS
AFTERNOON...WITH TEMPERATURES RUNNING WITHIN FOUR DEGREES OF WHERE
THEY WERE YESTERDAY.  SOME LOCATIONS ARE A LITTLE WARMER...AND SOME
LOCATIONS ARE A LITTLE COOLER.  THEREFORE...THE HOT AND MUGGY
WEATHER WILL CONTINUE THROUGH THE EVENING.

RADAR IMAGERY SHOWS ISOLATED SHOWERS AND THUNDERSTORMS DEVELOPING
ALONG THE CREST OF THE MOUNTAINS AGAIN THIS AFTERNOON.  THE ACTIVITY
THUS FAR HAS NOT BEEN QUITE AS WIDESPREAD TODAY.  THIS MAY BE IN
PART DUE TO A CAP AROUND 500 MBS...BUT THE STORMS HAVE SOME NICE
STRUCTURE.  UPPER LEVEL WINDS REMAIN RELATIVELY LIGHT...WHICH IS WHY
WE DECIDED TO ISSUE A FLASH FLOOD WATCH FOR THE MOUNTAINS AND
DESERTS TODAY.  ALSO INCLUDED PORTIONS OF THE INLAND EMPIRE...NEAR
THE ELSINORE CONVERGENCE AREA...AS THOUGHT THAT A SEA BREEZE AND
LAND BREEZE INTERACTION MAY DEVELOP LATER THIS AFTERNOON.  GIVEN THE
CURRENT RADAR TRENDS...THIS STILL LOOKS POSSIBLE...SO WILL KEEP THIS
WATCH IN PLACE THROUGH THE EVENING HOURS.

OTHERWISE...OVERALL PATTERN STARTS TO TRANSITION ON MONDAY AND
TUESDAY...AS A TROUGH OF LOW PRESSURE DIGS ALONG THE WEST COAST.
TEMPERATURES WILL STILL BE ON THE HOT SIDE TOMORROW...JUST NOT QUITE
AS HOT.  A GREATER COOLING TREND WILL OCCUR FOR TUESDAY THROUGH
THURSDAY.  AT THIS POINT IN TIME...A WEAK EDDY IS EVIDENT ALONG THE
COAST...WITH KSAN OBS CURRENTLY SOUTHERLY.  THE MARINE LAYER IS ALSO
PUSHING NORTHWARD ALONG THE COAST WITH THIS EDDY...AND WILL LIKELY
SEE SOME PATCHY LOW CLOUDS AND FOG TOMORROW MORNING ALONG THE
COAST.  THE MARINE LAYER WILL DEEPEN AND BECOME MORE WIDESPREAD AT
THE WEEK GOES ON.  FOR FRIDAY AND THE WEEKEND...HIGH PRESSURE STARTS
TO BUILD BACK OVER THE REGION...WITH A GRADUAL WARMING TREND
POSSIBLE.

&&

.AVIATION...
282030Z...COAST/VALLEYS...VFR EXPECTED THROUGH THIS EVENING WITH
SCATTERED TO BROKEN CLOUDS AOA 15000 FEET. LOW CLOUDS OF 700-1000
FEET ASL AND VIS 3-5SM ALONG THE COAST BETWEEN 11-15Z MONDAY.

MOUNTAINS/DESERTS...SCATTERED THUNDERSTORMS ALONG MOUNTAIN RIDGES
AND ADJACENT DESERTS OR INLAND VALLEYS UNTIL ABOUT 01Z. IN VICINITY
OF THUNDERSTORMS EXPECT STRONG UPDRAFTS AND DOWNDRAFTS AND BASES
AROUND 8000 FEET AND ISOLATED TOPS TO 40000 FEET.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...FLASH FLOOD WATCH UNTIL 7 PM PDT THIS EVENING FOR THE APPLE AND
     LUCERNE VALLEYS...RIVERSIDE COUNTY MOUNTAINS...SAN
     BERNARDINO COUNTY MOUNTAINS...SAN BERNARDINO AND RIVERSIDE
     COUNTY VALLEYS-THE INLAND EMPIRE...SAN DIEGO COUNTY
     DESERTS...SAN DIEGO COUNTY MOUNTAINS.

PZ...NONE.

&&

PUBLIC...PALMER
AVIATION/MARINE...MM

NWS ON THE WEB AT WEATHER.GOV/SANDIEGO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
245 AM PDT SUN AUG 28 2011

CAZ042-043-048-050-055>058-060>062-290100-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
245 AM PDT SUN AUG 28 2011

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

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON THROUGH EARLY
EVENING FOR THE MOUNTAINS...DESERTS...AND INLAND VALLEYS. THE FLASH
FLOOD POTENTIAL INDEX IS MODERATE...THUNDERSTORMS ARE EXPECTED TO
DEVELOP AND ISOLATED FLASH FLOODING IS POSSIBLE.

FOR INLAND AREAS...IT WILL BE HOT AND HUMID THIS AFTERNOON. AVOID
STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE
OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON-CAFFEINATED FLUIDS.
WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD
YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE
SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE.
NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY.
THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EARLY
EVENING.

MARTIN