A slow moving low pressure system brought several rounds of showers and thunderstorms across portions of southeast CA, mainly from the late morning through the late afternoon hours. Strong southerly flow out ahead of the low pressure system brought in highly anomalous moisture content across the southern half of Arizona, with PWATs surging to 1.1-1.4, which are near record values for mid-October. Along with the highly anomalous moisture values, moderate to high instability values were also present with MLCAPE rising to 1000-1500 J/KG. Bulk shear values between 25-35 kts were also present. The combination of the highly anomalous moisture content, instability, and shear along with the strong dynamic forcing to the east and north of the low pressure system was a recipe for these showers and thunderstorms to produce flash flooding as well as severe wind gusts and small hail. The area of the greatest impacts occurred across the Imperial Valley, where several reports of flooding along with damaging winds and small hail were received.

Flash Flood in RIVERSIDE, CALIFORNIA
From 15-OCT-22 15:01:00 to 15-OCT-22 17:01:00 (PST-8)
Location: (BLH)BLYTHE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Water running along the eastbound lanes of I-10 resulted in closure of the highway near Ford Dry Lake Road. No damages or injuries were reported.

Flash Flood in IMPERIAL, CALIFORNIA
From 15-OCT-22 16:21:00 to 15-OCT-22 17:21:00 (PST-8)
Location: BARD
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Car Stranded along Senator Wash Road about 5 miles south-southwest of Martinez Lake due to flooding. No injuries were reported.

Flash Flood in IMPERIAL, CALIFORNIA
From 15-OCT-22 12:10:00 to 15-OCT-22 15:10:00 (PST-8)
Location: EL CENTRO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Significant flooding was reported in the El Centro Regional Medical Center. There was 18 inches of flowing water in the parking lot, with the water entering the facility and affecting the emergency room as well as the radiology department. No injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 10:50:00 to 15-OCT-22 10:50:00 (PST-8)
Location: EL CENTRO
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Image of a large uprooted tree that fell onto a home, resulting in roof damage, in the area of Lenrey Avenue and South 5th Street in El Centro. Winds were estimated between 55-60 mph. Timing estimated from radar. No injuries were reported.

Flood in IMPERIAL, CALIFORNIA
From 15-OCT-22 11:30:00 to 15-OCT-22 13:30:00 (PST-8)
Location: (IPL)IMPERIAL CO ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several videos showed nuisance flooding across the El Centro area, with vehicles able to traverse through the standing water without any major issues. Water depth was estimated to be 3-5 at most. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 13:27:00 to 15-OCT-22 13:27:00 (PST-8)
Location: BARD
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet station at Senator Wash measured a 71 mph wind gust.

Flash Flood in RIVERSIDE, CALIFORNIA
From 15-OCT-22 16:00:00 to 15-OCT-22 19:00:00 (PST-8)
Location: DESERT CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All washes along SR-177 just north of Desert Center were flooded with Big Wash estimated to have received the most rainfall. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 10:50:00 to 15-OCT-22 10:50:00 (PST-8)
Location: (IPL)IMPERIAL CO ARP
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed powerlines, 10-15 approximately, reported in the area of Austin Road and West Aten Road in El Centro due to thunderstorm winds. Winds were estimated between 55-60 mph. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 10:50:00 to 15-OCT-22 10:50:00 (PST-8)
Location: EL CENTRO
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Several downed trees were reported across El Centro, with some of the trees falling onto roofs of home. Winds were estimated between 55-60 mph. Timing estimated from radar. No injuries were reported.

Flash Flood in RIVERSIDE, CALIFORNIA
From 15-OCT-22 13:40:00 to 15-OCT-22 15:40:00 (PST-8)
Location: FERRUM
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Plows from the California Highway Patrol removed flood debris from SR-111 near Milepost 65. Timing estimated from radar. No injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 10:50:00 to 15-OCT-22 10:50:00 (PST-8)
Location: HEBER
Magnitude: 52.00 EG
Property damage: 19.00K
Crop damage: 0.00K
Reported by: Public

Power poles, approximately 19, were snapped and spread around the area between El Centro and Calexico. Winds were estimated between 55-60 mph. Timing estimated from radar. No injuries were reported.

Flash Flood in IMPERIAL, CALIFORNIA
From 15-OCT-22 11:49:00 to 15-OCT-22 13:49:00 (PST-8)
Location: EL CENTRO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy flooding reported on the on and off ramp of South 4th street and I-8 in El Centro. No damages or injuries were reported.

Thunderstorm Wind in IMPERIAL, CALIFORNIA
From 15-OCT-22 12:41:00 to 15-OCT-22 12:41:00 (PST-8)
Location: WIEST
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Department of Highways

A powerline and possibly a power pole were blown down by thunderstorm winds in the area of SR-115 & Titsworth Road in Calipatria. Winds were estimated between 55-60 mph. No injuries were reported.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 15-OCT-22 14:57:00 to 15-OCT-22 15:57:00 (PST-8)
Location: TWENTY NINE PALMS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported moderate flow of water down Utah Trail located in the northwestern portion of Joshua Tree National Park. No damages or injuries were reported.