519  
FSUS46 KLOX 041119  
QPSLOX  
 
QUANTITATIVE PRECIPITATION FORECAST  
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA  
412 AM PDT THU MAY 04 2023  
 
PRECIPITATION FORECASTS IN INCHES ARE PROVIDED IN 3-HOUR  
INCREMENTS UNTIL 1700 FOLLOWED BY 6-HOUR INCREMENTS UNTIL 0500.  
THUNDERSTORM CHANCES COVER UP TO 0500 ON DAY 1 ONLY.  
 
LIGHT RAINFALL AMOUNTS GREATER THAN ZERO BUT LESS THAN A TENTH OF AN  
INCH ARE SHOWN AS LGT.  
 
THE DISCUSSION COVERS THE PERIOD FROM: THU MAY 04 2023 THROUGH WED MAY 10 2023.  
 

 
 
05-08 08-11 11-14 14-17 | 17-23 23-05  
 
SAN LUIS OBISPO COUNTY...  
 
LSRC1:CAMBRIA LGT 0.0 LGT 0.0 | 0.0 0.0  
SMRC1:SANTA MARGARITA LGT 0.0 LGT 0.0 | 0.0 0.0  
NIPC1:LOPEZ LAKE LGT 0.0 LGT 0.0 | 0.0 0.0  
 
SLO: PEAK 1-HR RATES: CST/VLY 0.01-0.03 FTHLS/MTNS 0.01-0.03  
EXPECTED TO OCCUR BETWEEN 0000-0200  
CHANCE OF THUNDERSTORMS: YES  
 

05-08 08-11 11-14 14-17 | 17-23 23-05  
 
SANTA BARBARA COUNTY...  
 
SIYC1:SANTA MARIA LGT 0.0 LGT 0.0 | 0.0 0.0  
SBTC1:SANTA BARBARA POTRERO LGT 0.0 LGT 0.0 | LGT 0.0  
GBRC1:GIBRALTAR DAM LGT 0.0 LGT 0.0 | 0.0 0.0  
SMCC1:SAN MARCOS PASS LGT 0.0 LGT 0.0 | 0.0 0.0  
SBFC1:SANTA BARBARA CITY LGT LGT LGT 0.0 | 0.0 0.0  
 
SBA: PEAK 1-HR RATES: CST/VLY 0.01-0.03 FTHLS/MTNS 0.01-0.05  
EXPECTED TO OCCUR BETWEEN 0000-0200  
CHANCE OF THUNDERSTORMS: YES  
 

05-08 08-11 11-14 14-17 | 17-23 23-05  
 
VENTURA COUNTY...  
 
FGWC1:FAGAN CANYON LGT LGT LGT 0.0 | LGT LGT  
HRCC1:HOPPER CANYON LGT LGT LGT LGT | LGT LGT  
MTDC1:MATILIJA DAM LGT LGT LGT 0.0 | LGT LGT  
VTUC1:VENTURA CITY LGT LGT LGT 0.0 | LGT LGT  
MORC1:MOORPARK LGT LGT LGT 0.0 | LGT LGT  
CRXC1:CIRCLE X RANCH LGT LGT LGT 0.0 | 0.0 LGT  
 
VTU: PEAK 1-HR RATES: CST/VLY 0.05-0.10 FTHLS/MTNS 0.05-0.10  
EXPECTED TO OCCUR BETWEEN 0000-0300  
CHANCE OF THUNDERSTORMS: YES  
 

05-08 08-11 11-14 14-17 | 17-23 23-05  
 
LOS ANGELES COUNTY...  
 
WFKC1:WEST FORK HELIPORT 0.6 0.2 LGT LGT | LGT LGT  
BDDC1:BIG DALTON DAM 0.5 0.2 LGT LGT | LGT LGT  
PCDC1:PACOIMA DAM 0.3 0.1 LGT 0.0 | LGT LGT  
FLTC1:LA CANADA FLINTRIDGE 0.4 0.1 LGT LGT | LGT LGT  
SAUC1:SAUGUS 0.2 0.1 LGT 0.0 | LGT LGT  
CQT:DOWNTOWN LA 0.4 0.1 LGT 0.0 | LGT LGT  
MLUC1:MALIBU BIG ROCK MESA 0.1 0.1 LGT 0.0 | LGT LGT  
 
LAC: PEAK 1-HR RATES: CST/VLY 0.05-0.25 FTHLS/MTNS 0.20-0.40  
EXPECTED TO OCCUR BETWEEN 0000-0500  
CHANCE OF THUNDERSTORMS: YES  
 

 
 
DISCUSSION:  
 
A COLD UPPER LOW WILL BRING RAIN AND A SLIGHT CHANCE OF TSTMS TO THE  
REGION TODAY, ESPECIALLY IN THE MORNING. A SLIGHT CHANCE OF SHOWERS  
WILL LINGER OVERNIGHT AND INTO FRIDAY. IN GENERAL, RAINFALL TOTALS  
WILL RANGE BETWEEN 0.50 AND 1.00 INCH ACROSS THE COASTAL AND VALLEY  
AREAS WITH AMOUNTS UP TO 1.00 TO 1.50 INCHES IN THE FOOTHILLS AND  
MOUNTAINS. RAIN RATES EXPECTED TO TOP OUT AROUND A HALF INCH PER  
HOUR, EXCEPT LOCALLY HIGHER IN THUNDERSTORMS.  
 
SNOW LEVELS WILL RANGE BETWEEN 4000 AND 4500 FEET. SNOWFALL TOTALS  
WILL LIKELY RANGE BETWEEN A DUSTING TO 3 INCHES BETWEEN 4500 AND  
6000 FEET. ABOVE 6000 FEET, SNOWFALL TOTAL WILL LIKELY RANGE BETWEEN  
4 AND 8 INCHES WITH LOCAL AMOUNTS UP 14 INCHES ON FAVORED PEAKS.  
 
A RETURN TO A MORE TRADITIONAL DRY MAY WEATHER PATTERN WILL START  
SUNDAY.  
 

 
 
RORKE  
 
THE LAST ROUTINE ISSUANCE OF THIS PRODUCT FOR THIS RAINY SEASON WILL BE  
AT 4PM APRIL 30. ROUTINE ISSUANCES WILL RESUME ON NOVEMBER 1.  
NON-ROUTINE ISSUANCES OF THIS PRODUCT WILL OCCUR SHOULD WIDESPREAD  
PRECIPITATION BE EXPECTED.  
 
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