037  
FSUS46 KLOX 062217  
QPSLOX  
 
QUANTITATIVE PRECIPITATION FORECAST  
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA  
400 PM PDT SAT MAY 6 2017  
 
PRECIPITATION FORECASTS IN INCHES ARE PROVIDED IN 3-HOUR  
INCREMENTS UNTIL 0500 FOLLOWED BY 6-HOUR INCREMENTS UNTIL 1700.  
THUNDERSTORM CHANCES COVER UP TO 1700 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: SAT MAY 06 2017 THROUGH SAT MAY 13 2017.  
 

 
17-20 20-23 23-02 02-05 | 05-11 11-17  
 
SAN LUIS OBISPO COUNTY...  
 
LSRC1:CAMBRIA LGT LGT LGT LGT | LGT LGT  
SMRC1:SANTA MARGARITA LGT LGT LGT LGT | LGT LGT  
NIPC1:LOPEZ LAKE LGT LGT LGT LGT | LGT LGT  
 
SLO: PEAK 1-HR RATES: CST/VLY 0.26-0.49 FTHLS/MTNS 0.26-0.49  
EXPECTED TO OCCUR BETWEEN 2000-1100  
CHANCE THUNDERSTORMS: YES  
 

 
17-20 20-23 23-02 02-05 | 05-11 11-17  
 
SANTA BARBARA COUNTY...  
 
SIYC1:SANTA MARIA CITY LGT LGT LGT LGT | LGT LGT  
SBTC1:SANTA BARBARA POTRERO LGT LGT 0.1 0.1 | 0.2 0.2  
GBRC1:GIBRALTAR DAM LGT LGT LGT LGT | LGT 0.2  
SMCC1:SAN MARCOS PASS LGT LGT LGT LGT | LGT 0.2  
SBFC1:SANTA BARBARA COUNTY BUILDING LGT LGT LGT LGT | LGT LGT  
 
SBA: PEAK 1-HR RATES: CST/VLY 0.26-0.49 FTHLS/MTNS 0.26-0.49  
EXPECTED TO OCCUR BETWEEN 2000-1700  
CHANCE THUNDERSTORMS: YES  
 

 
17-20 20-23 23-02 02-05 | 05-11 11-17  
 
VENTURA COUNTY...  
 
FGWC1:FAGAN CANYON LGT LGT LGT LGT | LGT LGT  
HRCC1:HOPPER CANYON LGT LGT LGT LGT | LGT LGT  
MTDC1:MATILIJA DAM LGT LGT 0.1 0.1 | LGT 0.2  
VTUC1:VENTURA COUNTY GOVT CENTER LGT LGT LGT LGT | LGT LGT  
MORC1:MOORPARK COUNTY YARD LGT LGT LGT LGT | LGT LGT  
CRXC1:CIRCLE X RANCH LGT LGT LGT LGT | LGT LGT  
 
VTU: PEAK 1-HR RATES: CST/VLY 0.26-0.49 FTHLS/MTNS 0.26-0.49  
EXPECTED TO OCCUR BETWEEN 2000-1700  
CHANCE THUNDERSTORMS: YES  
 

 
17-20 20-23 23-02 02-05 | 05-11 11-17  
 
LOS ANGELES COUNTY...  
 
WFKC1:WEST FORK HELIPORT (MT WILSON) LGT LGT LGT LGT | LGT LGT  
BDDC1:BIG DALTON DAM LGT LGT LGT LGT | LGT LGT  
PCDC1:PACOIMA DAM LGT LGT LGT LGT | LGT LGT  
FLTC1:LA CANADA FLINTRIDGE LGT LGT LGT LGT | LGT LGT  
SAUC1:SAUGUS LGT LGT LGT LGT | LGT LGT  
CQT :LOS ANGELES DOWNTOWN (USC) LGT LGT LGT LGT | LGT LGT  
MLUC1:BIG ROCK MESA LGT LGT LGT LGT | LGT LGT  
 
LAC: PEAK 1-HR RATES: CST/VLY 0.26-0.49 FTHLS/MTNS 0.26-0.49  
EXPECTED TO OCCUR BETWEEN 2000-1700  
CHANCE THUNDERSTORMS: YES  
 

 
 
DISCUSSION: A LATE SEASON COLD UPPER LEVEL LOW PRESSURE SYSTEM WILL  
MOVE OVER SOUTHWESTERN CALIFORNIA TONIGHT AND MOVE JUST EAST OF THE  
REGION SUNDAY AND SUNDAY NIGHT. THIS SYSTEM WILL BRING LIKELY  
SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS TO THE REGION DURING  
THE PERIOD. PEAK RAINFALL RATES WITH ANY THUNDERSTORMS COULD BE UP  
TO NEAR 0.50 INCH PER HOUR. RAINFALL AMOUNTS THROUGH SUNDAY NIGHT  
WILL BE HIGHLY VARIABLE...BUT IN GENERAL SHOULD RANGE FROM ABOUT  
0.25 TO 0.50 INCH FOR THE COAST AND VALLEYS...AND 0.50 TO 0.75 INCH  
IN THE MOUNTAINS. SNOW LEVELS WILL DROP TO 4000 TO 4500 FEET TONIGHT  
THEN INCREASE TO 5500 FEET OR MORE BY LATE SUNDAY. ABOUT 3 TO 6  
INCHES OF SNOW IS EXPECTED IN THE MOUNTAINS ESPECIALLY ABOVE 5000 TO  
5500 FEET. LOCALLY HEAVY SNOW IN THE MOUNTAINS MAY OCCUR IN ANY  
THUNDERSTORMS.  
 
WRAPAROUND MOISTURE WILL PERSIST MONDAY INTO TUESDAY WITH A CHANCE  
OF SHOWERS OVER THE MOUNTAINS AND ANTELOPE VALLEY MONDAY...AND A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER THIS AREA ON  
TUESDAY.  
 
DRY WEATHER CAN THEN BE EXPECTED IN ALL AREAS WEDNESDAY THROUGH  
SATURDAY.  
 

 
 
SIRARD  
 
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