Flash Flood Warning 1, NWS Los Angeles, CA

810 
WGUS76 KLOX 302343
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
443 PM PDT THU AUG 30 2012

CAC037-310200-
/O.CON.KLOX.FF.W.0001.000000T0000Z-120831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
443 PM PDT THU AUG 30 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM PDT FOR
CENTRAL LOS ANGELES COUNTY...

AT 435 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A STRONG THUNDERSTORM PRODUCING FLASH FLOODING ALONG ALISO 
CANYON ROAD IN THE SAN GABRIEL MOUNTAINS A FEW MILES SOUTHEAST OF 
ACTON. VERY HEAVY RAINFALL HAS BEEN CONFIRMED IN THIS AREA BY A RAIN 
GAUGE REPORTING OVER TWO INCHES IN ONE HOUR...WITH A STORM TOTAL 
EXCEEDING 2.5 INCHES. THIS STORM CONTINUES TO HAVE LITTLE MOVEMENT 
AND IS BACKBUILDING TOWARD THE SOUTHWEST ACROSS THE MOUNTAINS. 

EXPECT FLASH FLOODING IN THIS REGION WITH WATER RUNOFF AND POSSIBLE 
DEBRIS AND MUD FLOWS ACROSS ROADWAYS THROUGH 7 PM PDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. 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. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3437 11813 3453 11813 3457 11795 3451 11787
      3434 11807

$$

BOLDT

136 
WGUS76 KLOX 310102
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
602 PM PDT THU AUG 30 2012

CAC037-310106-
/O.CAN.KLOX.FF.W.0001.000000T0000Z-120831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
602 PM PDT THU AUG 30 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL LOS ANGELES
COUNTY...

SHOWERS AND THUNDERSTORMS HAD DISSIPATED OVER THE MOUNTAINS 
SOUTHEAST OF ACTON AND ALONG ALISO CANYON ROAD WHERE VERY HEAVY RAIN 
OCCURRED EARLIER IN THE AFTERNOON...THEREFORE THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. RAINFALL TOTALS WERE UP TO 3 INCHES IN 
THE WARNED AREA FROM THIS THUNDERSTORM ACTIVITY.

SOME CONTINUED WATER RUNOFF AND DEBRIS WILL BE POSSIBLE ALONG 
ROADWAYS IN THE MOUNTAINS THROUGH 7PM PDT. 

LAT...LON 3437 11813 3453 11813 3457 11795 3451 11787
      3434 11807

$$

BOLDT

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
210 PM PDT THU AUG 30 2012

.SYNOPSIS...
TODAY WILL REMAIN A FEW DEGREES ABOVE NORMAL THEN A TROUGH OF LOW
PRESSURE WILL RESULT IN A SLIGHT COOLING TREND THROUGH SATURDAY.
HIGH PRESSURE WILL START TO BUILD WESTWARD AGAIN ON SUNDAY RESULTING
IN NEAR NORMAL TEMPERATURES THROUGH THE MIDDLE OF NEXT WEEK.
MONSOONAL MOISTURE WILL BRING A SLIGHT CHANCE OF AFTERNOON
THUNDERSTORMS FOR THE MOUNTAINS AND DESERT THROUGH FRIDAY.

&&

.SHORT TERM (TODAY-MONDAY)...
TEMPERATURES GENERALLY COOLER TODAY...THOUGH WITH THE EXCEPTION OF
THE CENTRAL COAST AND THE MOUNTAINS...NOT AS STRIKING AS ORIGINALLY
THOUGHT. SCATTERED THUNDERSTORMS ARE FIRING OFF AGAIN IN THE
ANTELOPE VALLEY AND ADJACENT SAN GABRIEL FOOTHILLS...VERY SIMILAR TO
YESTERDAY. STRATUS HUGGING THE CENTRAL COAST TIGHTLY THIS AFTERNOON
AND LOOKS POISED FOR A SIMILAR INLAND PUSH LIKE LAST NIGHT...WITH
POSSIBLE DENSE FOG. AREAS TO THE SOUTH ARE A LITTLE LESS CONVINCING
WITH GOOD AFTERNOON CLEARING AND NEARBY CONVECTION. KEEPING PATCHY
COVERAGE WORDING FOR LATER TONIGHT...BUT COULD BE EVEN LESS THAN
THAT.

12Z MODELS CONTINUED TO SHOW AMPLE MOISTURE AT 700MB EXPANDING OVER
THE AREA TONIGHT INTO FRIDAY. WHILE THIS HAS NOT RESULTED IN MUCH IN
THE WAY OF WIDESPREAD CLOUDS THIS AFTERNOON...IT COULD TONIGHT AS
THINGS COOL DOWN AND CONVECTION CALMS DOWN. SO...WILL KEEP THE
PARTLY CLOUDY WORDING GOING. IF THESE CLOUDS DO FORM...A LIGHT
SPRINKLE IS NOT OUT OF THE QUESTION JUST ABOUT ANYWHERE.

THE WEAK TROUGH CURRENTLY PUSHING INTO NORTHERN CALIFORNIA WILL
CONTINUE TO DIG ITS FRINGES INTO OUR AREA TOMORROW. WHILE THIS WILL
BRING ADDITIONAL COOLING ON FRIDAY ESPECIALLY TO SLO AND SBA
COUNTIES...ONLY EXPECTING A COUPLE OF DEGREES OF COOLING TO AREAS TO
THE SOUTH AS ONSHORE GRADIENTS REMAIN WEEK AND THICKS ONLY FALL 2
DECAMETERS. SATURDAY LOOKS ABOUT THE SAME AS FRIDAY
TEMPERATURE-WISE. WITH THE UPPER LEVEL FLOW TURNING MORE SOUTH TO
SOUTHWESTERLY FRIDAY AND SATURDAY...CONVECTION CHANCES WILL BE
LOWERING...BUT THERE IS JUST ENOUGH MOISTURE AND INSTABILITY ALOFT
TO WARRANT A SLIGHT CHANCE FOR THE MTNS AND DESERTS OF LA/VTU COUNTY
ON FRIDAY.

THE TOUGHEST CALL OF THE DAY IS WHERE THE REMNANTS OF HURRICANE
ILEANA WILL TRACK OVER THE HOLIDAY WEEKEND. THE GFS CONTINUES TO
ROTATE IT AROUND THE RIDGE TO THE EAST...AND INTO SOUTH-CENTRAL
CALIFORNIA. THE ECMWF/NAM/GEM ALIGN AGAINST THIS SOLUTION...AND PUSH
IT WESTWARD INTO THE NETHER REGIONS AS THE RIDGE EXPANDS. WHILE THE
FORMER SOLUTION SEEMS TO BE THE MOST POPULAR AT THIS POINT WITH
FORECASTERS...THE GFS SOLUTION IS STILL POSSIBLE. IF THE GFS IS
CORRECT...JUST ABOUT ALL OUR AREA WOULD BE IN LINE FOR SOME SHOWERS
AND/OR THUNDERSTORMS LATE SUNDAY AND MONDAY. IF THE OTHERS ARE
RIGHT...WE WILL BE DRY...CLEAR...AND WARMER. FORECAST STILL LEANS ON
THE POPULAR SOLUTION...BUT KEPT CLOUDS OVER THE AREA AS A
HEDGE...AND DAMPENED THE WARMING TO ALMOST RESEMBLE LITTLE CHANGE
OVER THE PERIOD.

.LONG TERM (TUESDAY-THURSDAY)...
REGARDLESS OF HOW ILEANA BEHAVES...TUESDAY AND WEDNESDAY LOOK DRY
AND AROUND NORMAL AS THE RIDGE TO THE EAST SLOWLY PUSHES WESTWARD.
BY THE MIDDLE TO END OF NEXT WEEK...IT LOOKS LIKE THE CORE OF THE
RIDGE WILL BUILD INTO ARIZONA AND BRING ANOTHER ROUND OF WARMING.
WENT CONSERVATIVE ON THE TEMPERATURES AT THIS POINT...BUT WOULD BE
SURPRISED TO SEE TEMPERATURES SIMILAR TO YESTERDAY OR TODAY BY THE
END OF NEXT WEEK.

&&

.AVIATION...30/1800Z.
CONVECTIVE PARAMETERS COMING TOGETHER THIS AFTERNOON TO SUPPORT
ISOLATED TO SCATTERED CONVECTION ACROSS THE MOUNTAINS AND ANTELOPE
VALLEY. THE TWO TAFS IN THE ANTELOPE VALLEY NOW HAVE VCTS MENTIONED
FOR POSSIBLE IMPACTS FROM NEARBY CONVECTION. ELSEWHERE...COASTAL
SECTIONS NORTH OF POINT CONCEPTION WILL EXPERIENCE AREAS OF FOG AND
LOW CLOUDS WHILE COASTAL AREAS SOUTH OF POINT CONCEPTION WILL HAVE
ONLY PATCHY LOW CLOUDS AND FOG WITH A LATE ARRIVAL AND SHORT
DURATION. GOOD CONFIDENCE IN THE FORECAST.

KLAX...GOOD CONFIDENCE IN LATE ARRIVAL OF FOG AND LOW CLOUDS AND FOG
WITH SHORT DURATION. OTHERWISE...EXPECT VFR CONDITIONS.

KBUR...HIGH CONFIDENCE IN VFR CONDITIONS THROUGH FRIDAY.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY (SEE LAXMWWLOX).
HIGH SURF ADVISORY (SEE LAXCFWLOX).
COASTAL FLOOD STATEMENT (LAXCFWLOX).

&&

PUBLIC...KITTELL
AVIATION...SWEET
SYNOPSIS...SUKUP

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PDT THU AUG 30 2012

CAZ034>041-044>046-051>054-059-087-088-547-548-311300-
SAN LUIS OBISPO COUNTY CENTRAL COAST-
SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY-
SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY-
SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-
VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-
SANTA MONICA MOUNTAINS RECREATIONAL AREA-
SAN LUIS OBISPO COUNTY MOUNTAINS-
SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS-
LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-
ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY-
LOS ANGELES COUNTY SAN FERNANDO VALLEY-
LOS ANGELES COUNTY SAN GABRIEL VALLEY-
600 AM PDT THU AUG 30 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING
OVER THE MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS
THE ANTELOPE VALLEY.

.DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY

HIGH SURF WILL PRODUCE DANGEROUS RIP CURRENTS FRIDAY THROUGH SUNDAY.
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS DURING THE AFTERNOONS AND
EVENINGS OVER THE MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES AS
WELL AS THE ANTELOPE VALLEY.

* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

RORKE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
258 PM PDT THU AUG 30 2012

CAZ054-059-302245-
ANTELOPE VALLEY CA-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA
MONICA RANGE CA-
258 PM PDT THU AUG 30 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LOS ANGELES
COUNTY...MAINLY THE ANTELOPE VALLEY...UNTIL 345 PM PDT...

AT 248 PM PDT...DOPPLER RADARS INDICATED SEVERAL THUNDERSTORMS
DEVELOPING ACROSS THE EASTERN ANTELOPE VALLEY AND ADJACENT FOOTHILLS
OF THE EASTERN SAN GABRIEL MOUNTAINS. SPOTTERS HAVE REPORTED VERY
HEAVY RAIN...FREQUENT LIGHTNING...GUSTY WINDS AND SMALL HAIL WITH
THESE STORMS. THE THUNDERSTORMS HAVE BEGUN TO INCREASE IN COVERAGE
AND INTENSITY DURING THE PAST HOUR. HAIL UP TO ONE HALF INCH IN
DIAMETER...WIND GUSTS TO 50 MPH...FREQUENT LIGHTNING AND TORRENTIAL
DOWNPOURS CAN BE EXPECTED WITH THESE STORMS. ON THE PERIPHERY OF THE
STORMS...WHERE RAIN IS NOT AS HEAVY...THE LIGHTNING MAY CAUSE FIRE
IGNITION.

* LOCATIONS IMPACTED INCLUDE BUT ARE NOT BE LIMITED TO LITTLEROCK...
  PEARBLOSSOM AND LAKE LOS ANGELES.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3423 11766 3423 11767 3437 11815 3483 11826
      3482 11766 3433 11764
TIME...MOT...LOC 2152Z 086DEG 4KT 3457 11790

BRUNO/DG