Flash Flood Warning 6, NWS Los Angeles, CA

670 
WGUS76 KLOX 310113
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
613 PM PDT FRI AUG 30 2013

CAC037-310330-
/O.CON.KLOX.FF.W.0006.000000T0000Z-130831T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
613 PM PDT FRI AUG 30 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM PDT FOR
CENTRAL LOS ANGELES COUNTY...

AT 604 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORM NEAR PEARBLOSSOM AND LITTLE ROCK WAS 
WEAKENING...HOWEVER A FLASH FLOOD WARNING REMAINS IN EFFECT AS WATER 
WILL CONTINUE TO RUNOFF THE HIGHER TERRAIN. A TRAINED WEATHER SPOTTER 
REPORTED HEAVY RAIN AND LOCALIZED FLOODING AROUND HIGHWAY 138 
BETWEEN PEARBLOSSOM AND LITTLE ROCK. A RAIN GAUGE REPORTED A HALF AN 
INCH OF RAINFALL IN ABOUT 25 MINUTES NEAR AVENUE K NEAR LITTLE ROCK.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PEARBLOSSOM 
AND LITTLE ROCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

&&

LAT...LON 3465 11814 3463 11788 3442 11781 3439 11795
      3443 11810

$$

SUKUP/KAPLAN

118 
WGUS76 KLOX 310158
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
658 PM PDT FRI AUG 30 2013

CAC037-310205-
/O.CAN.KLOX.FF.W.0006.000000T0000Z-130831T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
658 PM PDT FRI AUG 30 2013

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

AT 658 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A WEAKENING AREA OF SHOWERS BETWEEN LITTLEROCK AND 
PALMDALE. THE THREAT OF FLASH FLOODING HAS ENDED AT THIS TIME.

LAT...LON 3465 11814 3463 11788 3442 11781 3439 11795
      3443 11810

$$

SUKUP/CK

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
215 PM PDT FRI AUG 30 2013

.SYNOPSIS...
A MOIST AND SLIGHTLY UNSTABLE AIRMASS WILL BRING POSSIBLE AFTERNOON
AND EVENING SHOWERS AND THUNDERSTORMS TO INTERIOR SECTIONS EACH DAY
THROUGH EARLY NEXT WEEK. A COOLING TREND WILL AFFECT THE AREA
SATURDAY THROUGH TUESDAY AS HIGH PRESSURE SHIFTS EAST OF THE AREA.
TEMPERATURES WILL RISE TO NEAR NORMAL VALUES BY MIDWEEK AS THE HIGH
BUILDS WESTWARD AGAIN.

&&

.SHORT TERM (TODAY-MON)...ANOTHER VERY WARM AND MUGGY DAY ACROSS THE
AREA TODAY. ODDLY THE COASTAL AREAS TRENDED MUCH WARMER WHILE
VALLEYS WERE ACTUALLY A FEW DEGREES COOLER. CONVECTION CONTINUES TO
STRUGGLE TO REALLY GET GOING IN OUR AREA THOUGH THE LA/SBD COUNTY
BORDER AGAIN LOOKS LIKE OUR BEST CHANCE FOR ANYTHING SIGNIFICANT.
WILL LEAVE THE FLASH FLOOD WATCH UP FOR LA/VENTURA MTNS AND AV,
THOUGH CERTAINLY THE EASTERN PORTION OF THAT AREA IS MORE LIKELY TO
SEE FLOODING.

HIGHS EXPECTED TO TREND A FEW DEGREES COOLER SATURDAY, ESPECIALLY AT
THE BEACHES WITH WHAT SHOULD BE AN EARLIER AND STRONGER SEA BREEZE
ARRIVAL. PWATS REMAIN QUITE HIGH (1.5-2") AND EXPAND NORTHWARD
THROUGH THE DAY. MODELS ALSO SHOWING BETTER INSTABILITY ACROSS THE
MOUNTAINS AND DESERTS THAN WE'VE SEEN RECENTLY SO CONVECTIVE
POTENTIAL APPEARS BETTER SATURDAY THAN WE'VE SEEN LATELY. COMBINED
THAT WITH THE HIGH PWATS AND 850 DEWPOINTS IN THE MID TEENS IT LOOKS
LIKE ANOTHER FLASH FLOOD WATCH WILL BE NEEDED FOR THE MOUNTAINS AND
ANTELOPE VALLEY, POSSIBLY EVEN INCLUDING THE SBA MTNS. STEERING FLOW
VEERS FROM THE EAST TO THE SOUTH TOMORROW AND IS SLIGHTLY STRONGER,
BUT STILL EXPECT STORMS TO BE FAIRLY SLOW MOVING. MINIMAL RISK OF
THOSE STORMS MOVING INTO THE LA/VENTURA VALLEYS DUE TO THE SOUTHERLY
WINDS ALOFT, THOUGH A SOMEWHAT BETTER CHANCE OF THE SOUTHERN PORTION
OF THE SLO INTERIOR GETTING SOME CONVECTION SO I'VE ADDED SOME LOW
POPS TO THAT AREA.

CONVECTIVE PARAMETERS REMAIN ABOUT THE SAME SUNDAY AND MONDAY,
THOUGH WITH INCREASING STEERING WINDS OUT OF THE SOUTH. PWATS ALSO
EXPECTED TO LOWER SLIGHTLY THROUGH THE PERIOD SO FLASH FLOODING RISK
WILL BE LOWER, THOUGH CERTAINLY NOT ZERO. TEMPERATURES EXPECTED TO
TREND A TOUCH COOLER SUN/MON, BACK TO NEAR NORMAL LEVELS. STILL
PRETTY MUGGY THROUGH SUNDAY BUT SHOULD SEE HUMIDITIES DROPPING SOME
ON MONDAY.

.LONG TERM (TUE-FRI)...TEMPS EXPECTED TO START TRENDING UPWARD BY
MID WEEK AS HIGH PRESSURE EXPANDS BACK WEST. HAVE LEFT TSTORMS OUT
OF THE FORECAST FOR NOW BUT GIVEN THE MID AND UPPER LEVEL FLOW FROM
THE SOUTH THE DOOR IS OPEN FOR SOME MONSOON MOISTURE, ESPECIALLY
EASTERN LA COUNTY. THURSDAY EXPECTED TO BE THE WARMEST DAY WITH THE
GFS SHOWING A LIGHT OFFSHORE FLOW AND REALLY WARM 950 TEMPS. IF THIS
SCENARIO HOLDS TRUE WE COULD BE LOOKING AT VALLEY HIGHS 103-108 AND
COASTAL AREAS WELL INTO THE 90S.

&&

.AVIATION...30/1800Z.

MID/UPPER LEVEL RIDGE OF HIGH PRESSURE OVER THE AREA WILL PERSIST.
UPPER LEVEL LIGHT SOUTH WINDS WILL PREVAIL WHILE MID LEVEL LIGHT
EAST WINDS BECOME LIGHT SOUTH BY 31/16Z. INCREASING MID/UPPER LEVEL
MOISTURE AFTER 30/23Z. ISOLATED TSTMS ARE EXPECTED OVER THE DESERT
AND HIGHER TERRAIN BETWEEN 30/18-31/06Z. TSTMS WILL MOVE EAST 10 KT
OR LESS AND WITH TOPS 45KFT. MARINE CLOUD FIELD WAS WEST AND NORTH
OF THE CHANNEL ISLANDS THIS MORNING. THE MARINE LAYER WAS CLOUD FREE
WITHIN THE BIGHT AND APPROXIMATELY .6KFT AND WILL DIFFER LITTLE
SATURDAY MORNING. WEAK TO MODERATE ONSHORE PRESSURE GRADIENT BETWEEN
30/20-31/03Z AND AFTER 31/20Z OTHERWISE A WEAK GRADIENT WILL EXIST.

KLAX...CHANCE CIGS 120 AT TIMES BETWEEN 30/20-31/01Z OTHERWISE
SCT-BKN180 BETWEEN 31/01-31/20Z.

KBUR...CHANCE CIGS 120 AT TIMES BETWEEN 30/20-31/01Z OTHERWISE
SCT-BKN180 AFTER 31/01Z.

VIRTUALLY CERTAIN - 95-100%
VERY LIKELY       - 80-95%
LIKELY            - 60-80%
CHANCE            - 30-60%
VERY UNLIKELY     - 20% OR LESS

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH (SEE LAXFFALOX).
SMALL CRAFT ADVISORY (SEE LAXMWWLOX).
SPECIAL WEATHER STATEMENT (SEE LAXSPSLOX).

&&

PUBLIC...MW
AVIATION...30
SYNOPSIS...SMITH

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
918 AM PDT FRI AUG 30 2013

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-
918 AM PDT FRI AUG 30 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT

FLASH FLOODING IS POSSIBLE WITH THUNDERSTORMS ACROSS THE LOS ANGELES
AND VENTURA COUNTY MOUNTAINS AND ANTELOPE VALLEY THIS AFTERNOON AND
EVENING. IT WILL BE HOT AND MUGGY AGAIN TODAY WITH LOCAL HEAT INDEX
READINGS CLOSE TO 105 IN THE LOS ANGELES AND VENTURA COUNTY VALLEYS
AND NEAR 100 IN THE MOUNTAINS.

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

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY

THERE WILL BE A SLIGHT CHANCE OF THUNDERSTORMS OVER THE VENTURA AND
LOS ANGELES COUNTY MOUNTAINS AND ANTELOPE VALLEY THROUGH EARLY NEXT
WEEK.

.SPOTTER INFORMATION STATEMENT...

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

MW