Flash Flood Warning 1, NWS Los Angeles, CA

140 
WGUS76 KLOX 222114
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
214 PM PDT MON JUL 22 2013

CAC037-222200-
/O.CON.KLOX.FF.W.0001.000000T0000Z-130722T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
214 PM PDT MON JUL 22 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM PDT FOR EAST
CENTRAL LOS ANGELES COUNTY...

AT 210 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE 
THUNDERSTORM THAT WAS NEAR BIG PINES HAS WEAKENED CONSIDERABLY. 
HOWEVER...FLASH FLOODING DUE TO RUNOFF FROM THE EARLIER HEAVY RAINS 
IS EXPECTED TO CONTINUE UNTIL 3 PM PDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3443 11783 3444 11772 3443 11766 3432 11765
      3430 11781

$$

SIRARD

676 
WGUS76 KLOX 222157
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
257 PM PDT MON JUL 22 2013

CAC037-222206-
/O.EXP.KLOX.FF.W.0001.000000T0000Z-130722T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
257 PM PDT MON JUL 22 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 PM PDT FOR EAST CENTRAL
LOS ANGELES COUNTY...

DOPPLER WEATHER RADAR INDICATED THE THUNDERSTORM WHICH CAUSED HEAVY 
RAIN AND FLASH FLOODING HAS DISSIPATED. THE THREAT OF FURTHER FLASH 
FLOODING HAS ENDED. HOWEVER...ADDITIONAL THUNDERSTORMS WITH HEAVY 
RAIN WILL BE POSSIBLE THROUGH THIS EVENING. A FLASH FLOOD WATCH 
REMAINS IN EFFECT THROUGH 11 PM PDT.

LAT...LON 3443 11783 3444 11772 3443 11766 3432 11765
      3430 11781

$$

SIRARD

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1100 AM PDT MON JUL 22 2013

..UPDATED AVIATION SECTION...

.SYNOPSIS...
A MOIST MONSOONAL FLOW WILL BRING ISOLATED SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS TO THE AREA TODAY AND TONIGHT. HEAVY RAIN
SHOWERS WILL BE POSSIBLE OVER THE MOUNTAINS AND DESERTS THIS
AFTERNOON AND EVENING. ON TUESDAY THE THREAT OF SHOWERS AND
THUNDERSTORMS WILL BE CONFINED TO THE LOS ANGELES AND VENTURA COUNTY
MOUNTAINS AND ANTELOPE VALLEY. FOR THE SECOND HALF OF THE WEEK...DRY
AND WARMER CONDITIONS ARE EXPECTED.

&&

.SHORT TERM (TODAY-WED)...GUIDANCE INITIALIZED MID/UPPER LEVEL PV
CENTERED OVER THE AREA THIS MORNING AND BROAD MID/UPPER LEVEL
MOISTURE FETCH EXTENDING NORTHWEST OVER THE AREA FROM MEXICO
REASONABLY WELL. WIDESPREAD PRECIPITATION WITH AMOUNTS LESS THAN
TENTH OF AN INCH WITH ISOLATED AMOUNTS AROUND ONE TENTH OVER SANTA
YNEZ RANGE HAD OCCURRED IN THE LAST 6 HOURS AS THE SYSTEM ADVANCED
NORTH AND WEST. THE WIDESPREAD RAIN HAD PUSHED NORTH OF THE AREA AT
THIS TIME AND ISOLATED SHOWERS WERE OVER NORTH HALF OF THE AREA WITH
CLEARING SKIES OVER THE SOUTH HALF. STABILITY DECREASES OVER THE
AREA WITH THE AFTERNOON HEATING AND ISOLATED THUNDERSTORMS ARE
POSSIBLE. THE STORMS WILL HAVE LITTLE MOVEMENT AND PWAT IS NEAR 2
INCHES AND FLASH FLOODING IS A THREAT OVER THE MOUNTAINS AND DESERT
THROUGH THE EVENING.

THE FOLLOWING IS AN EXCERPT FROM THE PREVIOUS DISCUSSION

THE GREATEST THREAT OF FLASH FLOODING IS OVER THE MTNS OF LA AND VTA
COUNTIES AS WELL AS THE AV WHERE THERE WILL BE THE GREATEST CHANCE
FOR TSTM FORMATION. THING ARE STILL NOT ALL THAT UNSTABLE BUT THE
AFOREMENTIONED MORNING SUNSHINE MIGHT ALLOW FOR ENOUGH SFC HEATING
TO CREATE LOCAL INSTABILITIES. THE THREAT OF TSTMS AND SHOWERS WILL
LINGER INTO THIS EVENING AND THEN NVA SHOULD CUT EVERYTHING OFF.
THERE WILL BE ENOUGH CLOUDS AND SHOWERS TO KEEP MAX TEMPS WELL BELOW
NORMAL (THERE IS ALSO ENOUGH CLOUDS AND HUMIDITIES TO KEEP THIS
MORNINGS LOWS ABOVE NORMAL.

TUESDAY WILL BE DRIER AS THE UPPER HIGH RETREATS EASTWARD. THERE
WILL BE A LITTLE MORE SUNSHINE AND A SLIGHT CHANCE OF AFTERNOON
TSTMS WILL CONTINUE OVER THE MTNS AND AV. THE FALLING HGTS CAUSED BY
THE RETREATING UPPER HIGH WILL MOSTLY COUNTERACT THE EFFECTS OF THE
INCREASED SUNSHINE AND MAX TEMPS WILL BE SIMILAR TO TODAYS. BUT THE
HUMIDITIES WILL BE DOWN SO IT WILL FEEL MORE COMFORTABLE.

THINGS BEGIN TO REVERT TO NORMAL WEDNESDAY. A BROAD UPPER RIDGE
COVERS MOST OF THE WESTERN PORTION OF THE CONUS AND A VERY WEAK
UPPER LOW WILL BE JUST TO THE WEST OF THE STATE. DRIER SSW FLOW
WILL CUT OFF THE TSTMS CHC BUT THERE WILL BE SOME BUILD UPS. THE
MARINE LAYER WILL STRUGGLE TO REFORM. MAX TEMPS INLAND WILL JUMP UP
BUT THE COASTAL MAX TEMPS WILL NOT CHANGE MUCH.

.LONG TERM (THU-SUN)...
ON THURSDAY AND FRIDAY THE UPPER HIGH WILL SIT OVER THE SRN NM AND A
WEAK UPPER LOW WILL CONTINUE TO SIT JUST OF THE COAST. THE UPPER
FLOW WILL MOSTLY BE SW AND DRY BUT A LITTLE MOISTURE MAY BE
ENTRAINED AND THE MTNS WILL SEE PARTLY CLOUDY SKIES IN THE
AFTERNOON. HGTS WILL RISE TO NEAR 590 DM AND MAX TEMPS WILL CLIMB TO
AND THEN EXCEED NORMALS. THE ATMOSPHERIC WARMING WILL ALLOW A BETTER
INVERSION TO FORM AND THERE WILL BE A NIGHT THROUGH MORNING LOW
CLOUD ACROSS THE COASTS.

LARGE SCALE TROFING MOVES INTO THE AREA OVER THE WEEKEND. THIS WILL
INCREASE THE MARINE LAYER AND KICK OFF A COOLING TREND.

&&

.AVIATION...22/1800Z...
SCT TO BKN MID AND UPPER LEVEL CLOUDS WILL PERSIST ACROSS THE REGION
INTO THIS EVENING. EXPECT ISOLATED TO SCATTERED SHOWERS AND TSTMS
THIS AFTERNOON AND EVENING...ESP IN THE MTNS OF L.A. AND VTA
COUNTIES AND THE ANTELOPE VALLEY. ANY THUNDERSTORM MAY HAVE LOWER
CIGS...BRIEF WIND GUSTS IN EXCESS OF 35 KT AND LOCALLY HEAVY RAIN.
ATMOSPHERE WILL BEGIN TO STABILIZE AFTER 06Z. MARINE LAYER WILL
BEGIN TO REFORM BY 12Z WITH PATCHY LOWER CIGS NEAR THE COAST.

KLAX...LOW TO MODERATE CONFIDENCE IN 18Z TAF. THERE IS A 10-20%
CHANCE OF A SHOWER OR TSTM IN THE VCNTY OF THE AIRPORT TODAY. THERE
IS A 20% CHANCE THAT CONDITIONS WILL REMAIN VFR TONIGHT INTO TUE
MORNING.

KBUR...MODERATE CONFIDENCE IN 18Z TAF. THERE IS A 20% CHANCE OF A
SHOWER OR TSTM IN THE VCNTY OF THE AIRPORT TODAY.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
FLOOD WATCH (SEE LAXFFALOX).
HIGH RIP CURRENT RISK (SEE LAXSRFLOX).
MARINE WEATHER STATEMENT (SEE LAXMWSLOX).

&&

PUBLIC...30/RORKE
AVIATION...SMITH
SYNOPSIS...SETO

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
801 AM PDT MON JUL 22 2013

CAZ034>041-044>046-051>054-059-087-088-547-548-231300-
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-
801 AM PDT MON JUL 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT

A CHANCE OF THUNDERSTORMS COULD BRING HEAVY RAIN CAPABLE OF
PRODUCING FLASH FLOODING TO THE MOUNTAINS AND ANTELOPE VALLEY
THROUGH THE EVENING. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS
ELSEWHERE INCLUDING THE COASTAL WATERS. BEACHGOERS WILL FACE A
THREAT OF RIP CURRENTS IN THE SURF ZONE.

* FLOOD WATCH................SEE WGUS66 KLOX - FFALOX FOR DETAILS *

* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *

* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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