838
FSUS46 KSGX 211055
QPSSGX
QUANTITATIVE PRECIPITATION FORECAST
NATIONAL WEATHER SERVICE SAN DIEGO CA
355 AM PDT WED OCT 21 2026
PRECIPITATION FORECAST IN INCHES IN 6-HOUR PERIODS...
[ BEGINNING TIMES FOR EACH PERIOD ARE IN LOCAL TIME... ]
[ FOR EXAMPLE...05THU ]
[ ...11THU IS A FORECAST FOR 5 AM TO 11 AM THURSDAY ]
[ FOR EXAMPLE...23THU ]
[ ...05FRI IS A FORECAST FOR 11 PM THURSDAY TO 5 AM FRIDAY]
..ORANGE COUNTY COASTAL AREAS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
HUNTINGTON BEACH
0.00 0.14 0.25 0.13 0.11 0.03 0.00 0.00 0.00 0.00 0.00 0.00
NEWPORT BEACH
0.00 0.14 0.24 0.14 0.11 0.03 0.02 0.00 0.00 0.00 0.00 0.00
LAGUNA BEACH
0.00 0.16 0.30 0.17 0.22 0.04 0.03 0.01 0.00 0.00 0.00 0.00
SAN CLEMENTE
0.00 0.08 0.33 0.21 0.36 0.05 0.01 0.04 0.00 0.00 0.00 0.00
..ORANGE COUNTY INLAND AREAS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
ANAHEIM
0.00 0.14 0.31 0.17 0.11 0.08 0.00 0.00 0.00 0.00 0.00 0.00
FULLERTON
0.00 0.12 0.25 0.13 0.27 0.08 0.00 0.00 0.00 0.00 0.00 0.00
BREA
0.00 0.12 0.32 0.17 0.15 0.08 0.00 0.00 0.00 0.00 0.00 0.00
VILLA PARK
0.00 0.09 0.31 0.25 0.12 0.09 0.00 0.00 0.00 0.00 0.00 0.00
..SANTA ANA MOUNTAINS AND FOOTHILLS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
FREMONT CANYON
0.00 0.08 0.39 0.27 0.14 0.08 0.01 0.00 0.00 0.00 0.00 0.00
SILVERADO CANYON, 3 MI EAST OF SILVERADO
0.00 0.09 0.22 0.32 0.13 0.12 0.03 0.00 0.00 0.00 0.00 0.00
MODJESKA PRESERVE
0.00 0.12 0.33 0.28 0.11 0.09 0.01 0.01 0.00 0.00 0.00 0.00
SANTIAGO PEAK
0.00 0.05 0.20 0.35 0.14 0.16 0.03 0.00 0.00 0.00 0.00 0.00
EL CARISO
0.00 0.01 0.14 0.38 0.14 0.09 0.00 0.00 0.00 0.00 0.00 0.00
SANTA ROSA PLATEAU
0.00 0.00 0.08 0.37 0.09 0.06 0.01 0.00 0.00 0.00 0.00 0.00
..SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
ONTARIO
0.00 0.01 0.20 0.29 0.09 0.12 0.00 0.00 0.00 0.00 0.00 0.00
SAN BERNARDINO
0.00 0.00 0.11 0.29 0.10 0.14 0.01 0.00 0.00 0.00 0.00 0.00
BEAUMONT
0.00 0.00 0.03 0.16 0.09 0.17 0.01 0.00 0.00 0.00 0.00 0.00
RIVERSIDE
0.00 0.00 0.14 0.22 0.08 0.11 0.00 0.00 0.00 0.00 0.00 0.00
PERRIS VALLEY CHANNEL
0.00 0.00 0.06 0.31 0.08 0.15 0.01 0.00 0.00 0.00 0.00 0.00
PRADO DAM
0.00 0.02 0.22 0.28 0.09 0.10 0.00 0.00 0.00 0.00 0.00 0.00
TEMECULA
0.00 0.00 0.06 0.25 0.12 0.10 0.00 0.00 0.00 0.00 0.00 0.00
HEMET
0.00 0.00 0.01 0.13 0.14 0.12 0.01 0.00 0.00 0.00 0.00 0.00
..RIVERSIDE COUNTY MOUNTAINS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
IDYLLWILD
0.00 0.01 0.01 0.04 0.14 0.13 0.05 0.00 0.00 0.00 0.00 0.00
..COACHELLA VALLEY
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
PALM SPRINGS
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
THERMAL
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
..SAN BERNARDINO COUNTY MOUNTAINS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
SAN ANTONIO DAM
0.00 0.08 0.48 0.38 0.22 0.36 0.03 0.00 0.00 0.00 0.00 0.00
LYTLE CREEK
0.00 0.01 0.26 0.41 0.17 0.10 0.01 0.00 0.00 0.00 0.00 0.00
WRIGHTWOOD
0.00 0.07 0.26 0.34 0.10 0.15 0.01 0.00 0.00 0.00 0.00 0.00
LAKE ARROWHEAD
0.00 0.01 0.28 0.60 0.20 0.22 0.10 0.00 0.00 0.00 0.00 0.00
BIG BEAR LAKE
0.00 0.00 0.01 0.14 0.08 0.16 0.01 0.00 0.00 0.00 0.00 0.00
BIG MORONGO CANYON
0.00 0.00 0.00 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00
..APPLE AND LUCERNE VALLEYS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
HESPERIA
0.00 0.00 0.03 0.20 0.04 0.04 0.00 0.00 0.00 0.00 0.00 0.00
VICTORVILLE
0.00 0.00 0.01 0.15 0.03 0.02 0.00 0.00 0.00 0.00 0.00 0.00
APPLE VALLEY
0.00 0.00 0.00 0.14 0.03 0.01 0.00 0.00 0.00 0.00 0.00 0.00
..SAN DIEGO COUNTY COASTAL AREAS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
OCEANSIDE
0.00 0.04 0.14 0.38 0.25 0.04 0.01 0.04 0.00 0.00 0.00 0.00
MIRAMAR
0.00 0.00 0.07 0.24 0.15 0.08 0.01 0.00 0.00 0.00 0.00 0.00
SAN DIEGO INTERNATIONAL AIRPORT
0.00 0.00 0.07 0.27 0.12 0.06 0.00 0.01 0.00 0.00 0.00 0.00
CHULA VISTA
0.00 0.00 0.05 0.31 0.10 0.04 0.00 0.00 0.00 0.00 0.00 0.00
SAN YSIDRO
0.00 0.00 0.04 0.27 0.21 0.05 0.00 0.00 0.00 0.00 0.00 0.00
..SAN DIEGO COUNTY VALLEYS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
FALLBROOK
0.00 0.01 0.08 0.45 0.21 0.05 0.00 0.00 0.00 0.00 0.00 0.00
RANCHO BERNARDO
0.00 0.00 0.05 0.22 0.11 0.08 0.02 0.01 0.00 0.00 0.00 0.00
LA MESA
0.00 0.00 0.05 0.30 0.19 0.06 0.01 0.01 0.00 0.00 0.00 0.00
EL CAJON
0.00 0.00 0.04 0.22 0.20 0.06 0.01 0.00 0.00 0.00 0.00 0.00
..SAN DIEGO COUNTY MOUNTAINS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
PALOMAR MOUNTAIN
0.00 0.00 0.03 0.10 0.10 0.12 0.01 0.00 0.00 0.00 0.00 0.00
JULIAN
0.00 0.00 0.04 0.03 0.21 0.14 0.05 0.01 0.00 0.00 0.00 0.00
MOUNT LAGUNA
0.00 0.00 0.00 0.03 0.11 0.06 0.02 0.00 0.00 0.00 0.00 0.00
CAMPO
0.00 0.00 0.01 0.03 0.11 0.05 0.00 0.00 0.00 0.00 0.00 0.00
..SAN DIEGO COUNTY DESERTS
05WED 11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI
11WED 17WED 23WED 05THU 11THU 17THU 23THU 05FRI 11FRI 17FRI 23FRI 05SAT
BORREGO SPRINGS
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
THE CENTER OF A CLOSED LOW PRESSURE SYSTEM WILL MOVE SLOWLY
EASTWARD TO A POSITION NEAR POINT CONCEPTION BY THURSDAY MORNING,
THEN MOVE MORE RAPIDLY NORTHEASTWARD INTO NEVADA BY LATE THURSDAY
EVENING.
AN INITIAL BAND OF SHOWERS AND ISOLATED THUNDERSTORMS WILL MOVE
INTO COASTAL AREAS INLAND TO THE MOUNTAINS DURING THE LATE
AFTERNOON AND EARLY EVENING WITH A SECOND ROUND DURING THE LATE
EVENING AND OVERNIGHT. INSTABILITY WILL INCREASE OVERNIGHT AS
COLDER AIR ALOFT MOVES ACROSS RECORD WARM COASTAL WATERS FOR THIS
TIME IN OCTOBER, AROUND 7 DEGREES WARMER THAN THE LONG-TERM
AVERAGE. WHILE COVERAGE OF PRECIPITATION MAY BE LESS OVERNIGHT,
THERE IS GREATER POTENTIAL FOR BRIEF HIGHER-INTENSITY RAINFALL
FROM ISOLATED THUNDERSTORMS AND STRONGER SHOWERS.
ADDITIONAL SHOWERS WILL CONTINUE ON THURSDAY ALONG WITH A SLIGHT
CHANCE OF THUNDERSTORMS DURING THE AFTERNOON. THE GREATER
COVERAGE IS EXPECTED FOR ORANGE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES FROM THE COAST TO THE MOUNTAINS. SHOWERS WILL CONTINUE
INTO THURSDAY EVENING, THEN DECREASE AND END FROM THE NORTHWEST
LATE THURSDAY NIGHT AND EARLY FRIDAY.
THROUGH THURSDAY NIGHT FOR ORANGE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES, RAINFALL IS EXPECTED TO RANGE FROM AROUND 0.75 INCH NEAR
THE COAST TO 1 TO 1.5 INCHES FOR THE SAN BERNARDINO COUNTY
MOUNTAINS. FOR SAN DIEGO COUNTY, RAINFALL WILL DECREASE FROM
NORTH TO SOUTH WITH 0.75 TO LOCALLY 1 INCH OVER NORTHWESTERN SAN
DIEGO COUNTY TO 0.25 TO 0.50 INCH ACROSS FAR SOUTHERN SAN DIEGO
COUNTY.
NBM PROBABILITIES FOR 0.10 INCH OR MORE OF RAINFALL THROUGH
THURSDAY NIGHT EXCEED 90 PERCENT FOR THE COAST, VALLEYS, AND
MOUNTAINS. PROBABILITIES FOR 0.50 INCH OR MORE EXCEED 80 PERCENT
FROM THE COAST TO THE MOUNTAINS. PROBABILITIES FOR 1 INCH OR MORE
EXCEED 50 PERCENT FROM THE COAST TO THE MOUNTAINS FOR ORANGE AND
SOUTHWESTERN SAN BERNARDINO COUNTIES INTO NORTHWESTERN SAN DIEGO
COUNTY. PROBABILITIES FOR 2 INCHES OR MORE EXCEED 10 PERCENT FROM
INLAND ORANGE COUNTY TO THE MOUNTAINS OF SOUTHWESTERN SAN
BERNARDINO COUNTY AND ARE AS HIGH AS 20 TO 30 PERCENT ON THE
COASTAL SLOPES OF THE SAN BERNARDINO COUNTY MOUNTAINS.
17
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page