A cold, upper-level closed low developed along the Central Coast and drifted south before stalling over southern California on the 23rd. Heavy showers began in the northern areas, spreading slowly south into San Diego County. The focus of the precipitation was over and west of the mountains on the 21st, as the low center just west of Oceanside drove southwesterly flow into the area. For the 22nd into the 23rd, the low shifted directly over San Diego, changing the flow to east/southeast and bringing the precipitation focus to the desert slopes and mountain ridges. Three-day storm total rainfall saw one quarter of an inch to one inch of rain for the coast and valley locations of Orange and San Diego Counties, while the Inland Empire saw up to 2.75 inches of rain on the slopes of the San Bernardino Mountains. Several roads were closed due to flooding in the Inland Empire, stalling a few vehicles and requiring swift water rescues. Heavy rain draining into a canyon near Moreno valley on the 21st resulted in flash flooding across a roadway, trapping vehicles and at least one person. The combination of one inch of rainfall in one hour and a storm pump failure resulted in flooding and a major rescue in the San Diego ���Midway��� area on the 21st as well. Very heavy rain near the Mexican Border on the 22nd caused several instances of flooding in the Tijuana River basin. A thunderstorm coming onshore near Solana Beach produced periods of dime to nickel-sized hail according to the lifeguards. The lower deserts were more varied in amounts ranging from one tenth of an inch to near three-quarters of an inch. The snow level started around 7000 feet on the 21st and dropped to 4000-5000 feet by the morning of the 22nd. Most locations above 4000 feet reported 1 to 3 inches of snow. However there were a few standout locations with heavy snow. Wrightwood, in the San Bernardino Mountains measured 11 to 13 inches at 6040 feet (spotter report). Pine Cove, in the Riverside County Mountains, measured 9 inches of snow at 6200 feet.

Flash Flood in RIVERSIDE, CALIFORNIA
From 21-NOV-13 13:00:00 to 21-NOV-13 16:00:00 (PST-8)
Location: MORENO VALLEY
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Two vehicles stuck in approximately 3 feet of moving water and mud at the intersection of San Timoteo canyon road and Live Oak Canyon Road. One trapped person was extricated around 1500 PST. One of the motorists stated that there is a natural waterway that runs down the canyon, but the water broke through, flooding the streets. Parts of San Timoteo Canyon Road from Live Oak Canyon Road to Barton Road were closed as a result.

Flood in SAN BERNARDINO, CALIFORNIA
From 21-NOV-13 14:00:00 to 21-NOV-13 20:30:00 (PST-8)
Location: BLUE JAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

An Emergency Manager reported that Fourth Avenue and Mountain Drive at Kendall Avenue were closed due to flooding. These are two low roads that cross a flood control channel. CHP reported standing water on Interstate 10, with lane 4 flooded, south of San Bernardino, near Colton. CHP also reported mud and large boulders on Lake Gregory Drive and Bernard Drive near Crestline. One to three inches of rain was reported over this large area over a period of about 6 hours from training heavy showers.

Hail in SAN DIEGO, CALIFORNIA
From 22-NOV-13 12:00:00 to 22-NOV-13 12:30:00 (PST-8)
Location: SOLANA BEACH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Solana Beach lifeguards observed dime to nickel sized hail, along with periods of smaller hail, from a thunderstorm that moved onshore.

Flash Flood in SAN DIEGO, CALIFORNIA
From 22-NOV-13 18:30:00 to 22-NOV-13 21:00:00 (PST-8)
Location: SAN YSIDRO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Tijuana River gage reported a rapid rise in flow between 1830 and 2100 PST...increasing by 2.6 feet during that time.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 22-NOV-13 08:00:00 to 23-NOV-13 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two spotters reported heavy 36-hour snow totals in the Wrightwood area, one of 9 inches and the other of 12 inches. Chains were required throughout the mountain areas.

Heavy Snow in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 22-NOV-13 12:00:00 to 22-NOV-13 21:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Total snowfall in the Idyllwild-Pine Cove area of 9 inches over a 9-hour period.

Flash Flood in RIVERSIDE, CALIFORNIA
From 21-NOV-13 17:00:00 to 21-NOV-13 20:00:00 (PST-8)
Location: HIGH GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The San Bernardino Sun reported that firefighters from Colton, San Bernardino and Riverside were called to the Santa Ana River bed, near the intersection of Riverside Avenue and Key Street around 1900 PST, to rescue five homeless people trapped in the normally dry channel by rapidly rising flood waters. One man was trapped in a tree and had to be rescued by helicopter. The other four were rescued from a small island just down-river of the other man, once flood waters had receded. The man in the tree was treated at a hospital for minor hypothermia, but the others were uninjured.

Flood in RIVERSIDE, CALIFORNIA
From 21-NOV-13 18:00:00 to 21-NOV-13 20:00:00 (PST-8)
Location: HIGH GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported roadway flooding along east La Candena Drive, a frontage road of Interstate 215. A 500-600 foot swath of 1 foot-deep, standing water covered the roadway, stalling at least one vehicle.

Flash Flood in SAN DIEGO, CALIFORNIA
From 21-NOV-13 20:30:00 to 21-NOV-13 22:30:00 (PST-8)
Location: (SAN)SAN DIEGO INTL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Local media reported flooding in the Witherby Street underpass at the Pacific Coast Highway in San Diego. A taxi and a minivan were nearly submerged in the water. The driver of the minivan was rescued by San Diego police. The nearby Lindbergh field ASOS reported 0.75 inches of rain between 2051 and 2151 PDT. A daily record for rainfall was set on this day at Lindbergh Field for a single day total of 1.46 inches of rain.