An upper level storm system coming from the Eastern Pacific interacted with monsoonal moisture on September 1, 2023. The interaction of these features led to the development of heavy rain and thunderstorms, which caused several instances of flooding in the Coachella Valley. Some instances of blowing dust were also observed.

Dust Storm in COACHELLA VALLEY, CALIFORNIA
From 01-SEP-23 15:30:00 to 01-SEP-23 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility estimated as low as 100 feet locally along Interstate 10 north of Palm Springs.
Three people died in a car crash on Sunday afternoon in Palm Springs on North Gene Autry Trail. Police said the crash was caused by high winds that kicked up sand, severely reducing visibility. Winds at Palm Springs Airport ASOS at the time were NW 15-20 mph with gusts to 25-30 mph.

Flash Flood in RIVERSIDE, CALIFORNIA
From 01-SEP-23 15:30:00 to 02-SEP-23 12:00:00 (PST-8)
Location: MECCA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding occurred at 67959 Lincoln Avenue after about 1.80 inches of rain fell nearby. Flooding continued through at least 10:30 AM on September 2nd, per CalTrans.

Flash Flood in RIVERSIDE, CALIFORNIA
From 01-SEP-23 14:00:00 to 01-SEP-23 16:00:00 (PST-8)
Location: COACHELLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

CalFire Riverside shared a video of several vehicles stranded in water 1 to 2 feet deep at 52nd Avenue and Education Way. One occupant was rescued.

Flash Flood in RIVERSIDE, CALIFORNIA
From 01-SEP-23 15:00:00 to 01-SEP-23 17:00:00 (PST-8)
Location: BERMUDA DUNES ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding occurred at 79650 Varner Road after 1.18 inches of rain fell nearby.

Flash Flood in RIVERSIDE, CALIFORNIA
From 01-SEP-23 16:00:00 to 01-SEP-23 18:00:00 (PST-8)
Location: COACHELLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWSS

Crews at Empire Polo Field reported that 50th Avenue was flooded after 1.89 inches of rain fell in 4 hours.

Flood in SAN BERNARDINO, CALIFORNIA
From 02-SEP-23 08:00:00 to 02-SEP-23 10:00:00 (PST-8)
Location: PHELAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Report of water flowing down Duncan Road and Sheep Creek Road, covering the westbound lanes in these areas.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 01-SEP-23 12:00:00 to 02-SEP-23 00:00:00 (PST-8)
Location: MORTMAR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain fell across the Coachella Valley on September 1st, with totals of 0.50-1.50 common across the region. Some localized higher totals include 2.83 at Kent Sea FMS (KSFC1), 1.97 at an observation site 2 miles southeast of Thermal (WRPC1), and 1.22 at Morongo Valley (MSKC1).

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 01-SEP-23 12:00:00 to 02-SEP-23 12:00:00 (PST-8)
Location: SUGARLOAF
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rain fell across the San Bernardino County Mountains on September 1st, runoff from which contributed to some flooding near the Phelan area. Totals were largely in the 0.25-1.00 range, but some localized higher totals fell at Middle Fork Lytle Creek (MFLC1) where 1.56 of rain fell, with roughly 1.50 of rain falling in Wrightwood.

Dust Storm in SAN DIEGO COUNTY DESERTS, CALIFORNIA
From 01-SEP-23 15:00:00 to 01-SEP-23 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Dust storm captured on video near Anza Borrego Desert Park.