Flash Flood Warning 51, NWS San Diego, CA

000 
WGUS76 KSGX 112159
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
259 PM PDT THU SEP 11 2008

CAC073-112315-
/O.CON.KSGX.FF.W.0051.000000T0000Z-080911T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
259 PM PDT THU SEP 11 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM PDT FOR
SOUTHEASTERN SAN DIEGO COUNTY...

AT 251 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM CAPABLE OF PRODUCING FLASH FLOODING OVER 
EXTREME SOUTHEASTERN SAN DIEGO COUNTY. THE RADAR ESTIMATED 2 INCHES 
OF RAIN PER HOUR BETWEEN 5 AND 10 MILES NORTH OF JACUMBA. RUNOFF 
FROM THIS STORM WILL LIKELY FLOOD WASHES DRAINING INTO THE DESERT IN 
THE FAR SOUTH PART OF ANZA-BORREGO DESERT STATE PARK...INCLUDING 
ALONG CARRIZO CREEK NEAR HIGHWAY S-2.

THUNDERSTORMS WERE MOVING WEST AT 10 TO 15 MPH AND WILL LIKELY 
AFFECT TIERRA DEL SOL AND LIVE OAK SPRINGS BETWEEN 300 PM AND 400 
PM...INCLUDING ALONG PARTS OF INTERSTATE 8.

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE 
FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE 
ROAD. 

LAT...LON 3259 11640 3287 11639 3288 11609 3286 11608
      3262 11609 3261 11611

$$

MAXWELL

000 
WGUS76 KSGX 112255
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
355 PM PDT THU SEP 11 2008

CAC073-112305-
/O.CAN.KSGX.FF.W.0051.000000T0000Z-080911T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
355 PM PDT THU SEP 11 2008

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN SAN
DIEGO COUNTY...

THE THUNDERSTORMS OVER SOUTHEASTERN SAN DIEGO COUNTY HAVE 
DISSIPATED. NO HEAVY RAIN HAD OCCURRED SINCE AROUND 330 PM.

LAT...LON 3259 11640 3287 11639 3288 11609 3286 11608
      3262 11609 3261 11611

$$

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