562
FSUS46 KLOX 061147
QPSLOX

Quantitative Precipitation Forecast
National Weather Service Los Angeles/Oxnard CA
409 AM PDT Sun Sep 06 2026

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: Sun Sep 06 2026 through Sat Sep 12 2026.

&&

                                    05-08  08-11  11-14  14-17  |  17-23  23-05

San Luis Obispo County...

LSRC1:Cambria                          0.0    0.0    0.0    0.0   |   0.0   0.0
SMRC1:Santa Margarita                  0.0    0.0    0.0    0.0   |   0.0   0.0
NIPC1:Lopez Lake                       0.0    0.0    0.0    0.0   |   0.0   0.0

1-Hr Rates:              Coasts/Valleys   Foothills/Mountains
Expected Peak (in/hr):   0.00             0.01-0.03
Probability 0.50+ in/hr: 0%               <5%
Probability 1.00+ in/hr: 0%               <5%

Peak rates expected to occur between: 1300-1600

Chance of Thunderstorms: 0%

&&                                    05-08  08-11  11-14  14-17  |  17-23  23-05

Santa Barbara County...

SIYC1:Santa Maria                      0.0    0.0    0.0    0.0   |   0.0   0.0
SBTC1:Santa Barbara Potrero            0.0    0.0    lgt    0.0   |   0.0   0.0
GBRC1:Gibraltar Dam                    0.0    lgt    lgt    0.0   |   0.0   0.0
SMCC1:San Marcos Pass                  0.0    0.0    lgt    0.0   |   0.0   0.0
SBFC1:Santa Barbara City               0.0    lgt    lgt    0.0   |   0.0   0.0

1-Hr Rates:              Coasts/Valleys   Foothills/Mountains
Expected Peak (in/hr):   0.01-0.03        0.01-0.03
Probability 0.50+ in/hr: <5%              <5%
Probability 1.00+ in/hr: <5%              <5%

Peak rates expected to occur between: 0900-1400

Chance of Thunderstorms: 0%

&&                                    05-08  08-11  11-14  14-17  |  17-23  23-05

Ventura County...

FGWC1:Fagan Canyon                     0.0    lgt    lgt    0.0   |   0.0   0.0
HRCC1:Hopper Canyon                    0.0    lgt    lgt    0.0   |   0.0   0.0
MTDC1:Matilija Dam                     0.0    lgt    lgt    0.0   |   0.0   0.0
VTUC1:Ventura City                     0.0    lgt    lgt    0.0   |   0.0   0.0
MORC1:Moorpark                         lgt    lgt    lgt    0.0   |   0.0   0.0
CRXC1:Circle X Ranch                   lgt    lgt    lgt    0.0   |   0.0   0.0

1-Hr Rates:              Coasts/Valleys   Foothills/Mountains
Expected Peak (in/hr):   0.01-0.03        0.01-0.03
Probability 0.50+ in/hr: <5%              <5%
Probability 1.00+ in/hr: <5%              <5%

Peak rates expected to occur between: 0900-1200

Chance of Thunderstorms: 20%
Isolated rates around 0.0 in/hr possible near thunderstorms.

&&                                    05-08  08-11  11-14  14-17  |  17-23  23-05

Los Angeles County...

WFKC1:West Fork Heliport               lgt    0.2    0.2    lgt   |   lgt   0.0
BDDC1:Big Dalton Dam                   lgt    0.2    0.3    lgt   |   lgt   0.0
PCDC1:Pacoima Dam                      lgt    lgt    lgt    0.0   |   0.0   0.0
FLTC1:La Canada Flintridge             lgt    0.1    0.1    lgt   |   lgt   0.0
SAUC1:Saugus                           lgt    lgt    lgt    0.0   |   0.0   0.0
CQT:Downtown LA                        lgt    0.1    0.1    lgt   |   0.0   0.0
MLUC1:Malibu Big Rock Mesa             lgt    lgt    lgt    lgt   |   0.0   0.0

1-Hr Rates:              Coasts/Valleys   Foothills/Mountains
Expected Peak (in/hr):   0.05-0.10        0.10-0.20
Probability 0.50+ in/hr: <5%              <5%
Probability 1.00+ in/hr: <5%              <5%

Peak rates expected to occur between: 0800-1300

Chance of Thunderstorms: 20%
Isolated rates around 0.5 in/hr possible near thunderstorms.

&&

DISCUSSION: Rain will start early this morning and last into the
evening or early overnight. Rain totals of a tenth to third of an
inch will be common where most consistent banding of showers and
isolated thunderstorms occur, which is still looking likely in Los
Angeles into eastern Ventura County. Isolated totals in excess of
0.5-1 inch is possible especially coastal foothills or where
training of heavier showers occurs. There is a 5-10 percent chance
of rainfall rates of 0.25-0.5 inches per hour (much of which could
fall in about 30 minutes), which would cause some flooding issues,
especially sensitive areas. In addition to minor roadway flooding
concerns, roads could become slick and dangerous due to the buildup
of oil after many dry months.

A boundary lifting back north later Monday and especially into
Tuesday may support another round of light to moderate showers just
about anywhere. Cannot rule out an isolated thunderstorm focused
across interior mountains.

Lingering moisture in the region could support isolated afternoon to
evening showers or thunderstorms focused across the mountains
beginning Thursday.

$$