Severe Thunderstorm Warning 10, NWS San Diego, CA

000 
WWUS56 KSGX 112151
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
251 PM PDT THU SEP 11 2008

CAC073-112200-
/O.EXP.KSGX.SV.W.0010.000000T0000Z-080911T2200Z/
SAN DIEGO CA-
250 PM PDT THU SEP 11 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SAN DIEGO COUNTY
WILL EXPIRE AT 300 PM PDT...

THE THUNDERSTORM OVER EXTREME SOUTHEASTERN SAN DIEGO COUNTY HAD 
WEAKENED SOMEWHAT SINCE 215 PM. WHILE HEAVY RAIN...SMALL HAIL AND 
GUSTY WINDS TO 35 MPH ARE POSSIBLE AS THIS STORM MOVES WEST AT 15 
MPH...THE THREAT OF LARGE HAIL AND DAMAGING WINDS HAD DIMINISHED.

LAT...LON 3285 11638 3279 11609 3262 11609 3261 11611
      3261 11617 3260 11618 3260 11627 3259 11629
      3260 11639
TIME...MOT...LOC 2150Z 095DEG 4KT 3269 11617

$$

MAXWELL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
930 AM PDT THU SEP 11 2008

.SYNOPSIS...THE MARINE LAYER AND ONSHORE FLOW WILL CONTINUE COASTAL
LOW CLOUDS AND FOG DURING THE NIGHTS AND MORNINGS...EXTENDING
LOCALLY INLAND. MID LEVEL MOISTURE IN EAST FLOW WILL BRING A CHANCE
OF THUNDERSTORMS TO THE MOUNTAINS THIS AFTERNOON AND EVENING. WARMER
THIS WEEKEND AND EARLY NEXT WEEK UNDER HIGH PRESSURE.

&&

.DISCUSSION...FOR SOUTHWEST CALIFORNIA INCLUDING SAN DIEGO...
ORANGE...SOUTHWEST SAN BERNARDINO AND WEST RIVERSIDE COUNTIES.

.SHORT TERM (TODAY-SUN)...LOW CLOUDS AND PATCHY FOG WERE INTO THE
COASTAL AREAS AND MOST INLAND VALLEYS THIS MORNING. MOSTLY CLEAR
ELSEWHERE EXCEPT FOR DEBRIS CLOUDS FROM EARLIER CONVECTION MOVING IN
FROM THE E. THE 12Z NKX SOUNDING HAD AN INVERSION BASED NEAR
3100 FT. IT WAS A LITTLE MORE MOIST AND UNSTABLE WITH MID LEVEL
MOISTURE IN WEAK ELY WINDS. WEAK OFFSHORE GRADIENTS FROM THE N AND
ONSHORE TO THE E WITH ABOUT 4 MB SAN-IPL.

THERE WILL BE ENOUGH INSTABILITY...COMBINED WITH THE MID LEVEL
MOISTURE DRIFTING IN FROM THE E...TO PRODUCE A SLIGHT CHANCE OF
THUNDERSTORMS IN THE HIGH MOUNTAINS AND ADJACENT DESERT SLOPES THIS
AFTERNOON AND EVENING. THE UPPER TROUGH WILL PUSH E AND A RIDGE OVER
THE E PAC WILL SLOWLY MOVE OVER THE WRN US. GRADIENTS WILL REMAIN
WEAKLY OFFSHORE FROM THE N BUT ONSHORE TO THE E WITH THE SEA BREEZE
PREVAILING DURING THE AFTERNOONS. WARMING TREND WITH MAX TEMPS
GETTING BACK INTO THE MID 90S IN THE WARMER INLAND VALLEYS. THE
MARINE LAYER WILL BECOME SHALLOWER WITH LOW CLOUDS AND FOG MOSTLY
CONFINED TO THE COASTAL AREAS AND WRN INLAND VALLEYS DURING THE
NIGHTS AND MORNINGS.

&&

.LONG TERM (MON-THU)...MINOR CHANGES THROUGH EARLY NEXT WEEK. A WEAK
UPPER LEVEL TROUGH SHOULD BRING A LITTLE COOLING AND MORE MARINE
LAYER CLOUDINESS TOWARD MID WEEK. THERE ARE INDICATIONS OF A
POSSIBLE INCREASE IN MID LEVEL MOISTURE IN SLY FLOW...BUT MODELS
REMAIN INCONSISTENT. THERE COULD BE MORE MID TO HIGH CLOUDS AT TIMES
AND CU OVER THE MOUNTAINS.

&&

.AVIATION...
111430Z...MARINE LAYER DEPTH THIS MORNING WAS AROUND 3000 FEET.
LITTLE CHANGE IS THE DEPTH IS EXPECTED THROUGH FRIDAY. STRATUS WITH
BASES AROUND 2000 FEET MSL SHOULD BREAK UP OVER INLAND AREAS BETWEEN
15Z AND 17Z AND ALONG THE COAST BETWEEN 17Z AND 19Z. STRATUS SHOULD
RETURN TO THE COAST BY SUNSET AND SPREAD INLAND INTO INLAND VALLEY
AREAS BY MIDNIGHT. STRATUS SHOULD REACH KONT BETWEEN 07Z AND 10Z.
SIMILAR BREAKUP EXPECTED ON FRIDAY.

ABOVE THE MARINE LAYER...SOME AFTERNOON CU OVER THE MOUNTAINS
TODAY.  A FEW OF THESE COULD DEVELOP INTO TSTMS OVER THE MOUNTAINS.
BASES SHOULD BE AROUND FL080 WITH TOPS TO FL350 AT TIMES. OTHERWISE
A MOSTLY CLEAR SKY WITH UNRESTRICTED VISIBILITIES WILL CONTINUE
THROUGH FRIDAY.  HORTON

.SGX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

PUBLIC...ATKIN
AVIATION/MARINE...HORTON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
604 AM PDT THU SEP 11 2008

CAZ042-043-048-050-055>058-060>062-120000-
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-
604 AM PDT THU SEP 11 2008

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

.DAY ONE...TODAY AND TONIGHT

SOUTH SWELL WILL CAUSE ABOVE NORMAL SURF WITH AN ELEVATED AND
DANGEROUS RIP CURRENT RISK ON ORANGE COUNTY BEACHES.

MID LEVEL MOISTURE WILL BRING A SLIGHT CHANCE OF SHOWERS OR
THUNDERSTORMS TO THE MOUNTAINS AND ADJACENT DESERTS THIS AFTERNOON
AND EVENING. THE FLASH FLOOD POTENTIAL INDEX IS LOW...THE RISK OF
FLASH FLOODING IN MINIMAL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SOUTH SWELL WILL CAUSE ABOVE NORMAL SURF WITH AN ELEVATED AND
DANGEROUS RIP CURRENT RISK FRIDAY ON ORANGE COUNTY BEACHES.

OTHERWISE...NO WIDESPREAD HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

ATKIN