Flash Flood Warning 84, NWS San Diego, CA

000 
WGUS76 KSGX 032210
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 PM PDT WED AUG 3 2005

CAC073-032315-
SAN DIEGO CA-
310 PM PDT WED AUG 3 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 415 PM PDT FOR EASTERN SAN
DIEGO COUNTY...

AT 305 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORMS PRODUCING FLASH FLOODING FROM NEAR JACUMBA 
TO MT. LAGUNA. ANOTHER STORM WITH HEAVY RAIN HAD DEVELOPED 6 MILES 
EAST OF JULIAN. THE STORM NEAR JULIAN WAS DRIFTING SLOWLY SOUTH AT 5 
MPH WHILE THE STORMS NEAR MT. LAGUNA WERE DRIFTING NORTH AT 10 MPH.

THE STORMS MOVEMENT SUGGESTS ADDITIONAL DEVELOPMENT WILL BE LIKELY 
JUST EAST OF CUYAMACA PEAK BY 330 THIS AFTERNOON. 

DOPPLER RADAR ESTIMATES LOCAL RAINFALL OF UP TO TWO AND ONE HALF 
INCHES IN SPOTS BETWEEN BOULEVARD AND CAMPO. INTERSTATE 8 IS LIKELY 
FLOODED IN THIS AREA.  

RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED AREAS SHOULD BE 
ALERT TO HEAVY MUD AND DEBRIS FLOWS WHICH MAY BLOCK ROADS AND 
CULVERTS. POTENTIALLY DANGEROUS FLOODING AND PROPERTY LOSS COULD 
RESULT IN AREAS WHERE RUNOFF IS RESTRICTED OR BLOCKED.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

LAT...LON 3334 11689 3303 11667 3260 11648 3264 11615
      3343 11646

$$

JAD

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
230 PM PDT WED AUG 3 2005

.SYNOPSIS...MOISTURE IN EASTERLY FLOW ALOFT WILL CONTINUE
THUNDERSTORMS IN THE MOUNTAINS AND DESERTS...MAINLY IN THE
AFTERNOONS AND EVENINGS. A FEW STORMS COULD DRIFT WEST OF THE
MOUNTAINS INTO THE VALLEYS THURSDAY THROUGH THE WEEKEND. A SHALLOW
MARINE LAYER WILL CAUSE AREAS OF LOW CLOUDS AND FOG NEAR THE COAST
IN THE NIGHTS AND MORNINGS...LINGERING NEAR SOME BEACHES INTO THE
AFTERNOONS.

&&

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

OUTFLOW FROM AZ CAUSED A FEW THUNDERSTORMS IN THE ERN PART OF OUR
CWFA THIS MORNING BUT THEY DISSIPATED BY LATE MORNING. THUNDERSTORMS
REDEVELOPED OVER THE MOUNTAINS THIS AFTERNOON. LOW CLOUDS AND LOCAL
FOG WERE INTO MOST COASTAL AREAS AND WRN INLAND SAN VALLEYS THIS
MORNING. STRATUS REMAINS EXTENSIVE OFFSHORE. THE 12Z NKX SOUNDING
HAD A MODERATELY STRONG INVERSION BASED NEAR 1200 FT AND SHOWED MID
LEVEL MOISTURE IN ELY FLOW. THE PW WAS 1.12 INCHES...A LITTLE LESS
THAN THE LAST COUPLE OF DAYS. HOWEVER...SATELLITE INDICATES HIGHER
PW E OF THE MOUNTAINS.

THE MID LEVEL MOISTURE WILL INCREASE THU THROUGH SAT FOR MORE
WIDESPREAD AFTERNOON THUNDERSTORMS IN THE MOUNTAINS AND DESERTS.
THERE WILL BE A SMALLER CHANCE OF THUNDERSTORMS CONTINUING THROUGH
THE NIGHTS. ELY FLOW WILL ALSO INCREASE THROUGH THE MID LEVELS AND
THIS COULD CAUSE A FEW STORMS TO DRIFT W OF THE MOUNTAINS INTO THE
INLAND VALLEYS EACH DAY. THE MARINE LAYER WILL SHRINK AS THE HI
BUILDS OVER THE SW AND DUE TO THE INCREASING MONSOONAL FLOW. EXPECT
WARMING IN THE COASTAL AREAS. RELATIVELY MINOR TEMP CHANGES
INLAND...ALTHOUGH THE EXACT DISTRIBUTION OF CLOUD COVER AND RH WILL
HAVE THE MOST IMPACT ON LOCAL TEMPS.

LONGER RANGE PROGS INDICATE THE ELY FLOW ALOFT WEAKENING SUN AND
TURNING MORE SLY THROUGH THE MIDDLE OF NEXT WEEK. THIS SHOULD KEEP
MOST THUNDERSTORMS CONFINED TO THE MOUNTAINS AND DESERTS.
OTHERWISE...NOT MUCH CHANGE.

&&

.AVIATION...THUNDERSTORMS WILL END BY SUNSET IN THE MTNS AND
DESERTS. LESS STRATUS ALONG THE COAST TO START WITH AND CIGS WILL
MOVE ASHORE A LITTLE LATER THIS EVE. THE MARINE LAYER IS EXPECTED TO
GO MORE SHALLOW TONIGHT AS WELL AND THAT WILL MEAN COASTAL CLOUD
COVERAGE MORE CONFINED TO THE COAST WITH LOWER BASES...TOPS AND
VISBYS...AND EARLIER CLEARING THU MORNING. TSTORMS EXPECTED THU
AFTERNOON IN THE MTNS AND DESERTS WITH EVEN A SMALL POSSIBILITY WEST
OF THE MTNS.

.SGX WATCHES/WARNINGS/ADVISORIES...HAZARDOUS WEATHER OUTLOOK FOR
THUNDERSTORMS IN THE MOUNTAINS AND DESERTS...SEE LAXHWOSGX.

&&

PUBLIC...ATKIN
AVIATION...MM

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
400 AM PDT WED AUG 3 2005

CAZ055-056-058-032300-
SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-
SAN DIEGO COUNTY MOUNTAINS-
400 AM PDT WED AUG 3 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOUNTAIN AREAS IN EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY THROUGH TONIGHT.

MODERATE FLASH FLOOD POTENTIAL RATING. THUNDERSTORMS WITH ISOLATED
FLASH FLOODING ARE POSSIBLE. ISOLATED SEVERE THUNDERSTORMS WITH
LARGE HAIL AND STRONG WINDS IN EXCESS OF 60 MPH ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY.
FOR THURSDAY...HIGH FLASH FLOOD POTENTIAL RATING. THUNDERSTORMS WITH
AREAS OF HEAVY RAIN ARE POSSIBLE...AND THE THREAT OF FLASH FLOODING
COULD BE SIGNIFICANT.

FOR FRIDAY THROUGH TUESDAY...THUNDERSTORMS WITH DANGEROUS
LIGHTNING...SMALL HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND
LOCAL FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS REQUESTED FOR THIS AREA STARTING AT NOON TODAY.

CAZ060-061-062-032300-
APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-
SAN DIEGO COUNTY DESERTS-
400 AM PDT WED AUG 3 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DESERTS IN EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY THROUGH TONIGHT.

MODERATE FLASH FLOOD POTENTIAL RATING. THUNDERSTORMS WITH ISOLATED
FLASH FLOODING ARE POSSIBLE. ISOLATED SEVERE THUNDERSTORMS WITH
LARGE HAIL AND STRONG WINDS IN EXCESS OF 60 MPH ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY.
FOR THURSDAY...MODERATE FLASH FLOOD POTENTIAL RATING. THUNDERSTORMS
WITH ISOLATED FLASH FLOODING ARE POSSIBLE.

FOR FRIDAY THROUGH TUESDAY...THUNDERSTORMS WITH DANGEROUS
LIGHTNING...SMALL HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND
LOCAL FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS REQUESTED FOR THIS AREA STARTING AT NOON TODAY.

NOTE...THE HAZARDOUS WEATHER OUTLOOK NOW INCORPORATES THE FLASH
FLOOD POTENTIAL INDEX THAT WAS ISSUED SEPARATELY IN PREVIOUS YEARS.
THE FLASH FLOOD POTENTIAL INDEX WILL BE INCLUDED IN THE HAZARDOUS
WEATHER OUTLOOK IF IT EXCEEDS THE LOW CATEGORY IN THE FIRST TWO
DAYS. THIS PRODUCT WILL BE UPDATED DAILY AT 4 AM AND 4 PM OR AS
NEEDED THROUGH SEPTEMBER 30.

MARTIN

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