Scattered thunderstorms developed across the lower deserts of Imperial County - from the Imperial Valley eastward to the lower Colorado River valley - during the afternoon and evening hours on September 25th. Instability was elevated due to the close proximity of an upper level low pressure system and cool air aloft, and the increased instability aided the thunderstorm development. As was the case over the past couple of days, the stronger thunderstorms primarily generated very heavy rain with peak rain rates well in excess of one inch per hour. Multiple reports from the California Highway Patrol indicated that flash flooding was occurring along State Route 78, from near the Cibola National Wildlife Refuge south to near Interstate 8. Local law enforcement also reported 30 vehicles stuck due to flowing water in a wash near Ogilby Road about 10 miles northeast of Glamis. Later in the evening, around 1945PST, there was a public report of flash flooding in Brawley where water at least one foot deep was overflowing an embankment. Multiple Flash Flood Warnings were issued; fortunately there were no reports of injuries due to the flash flooding.

Flash Flood in IMPERIAL, CALIFORNIA
From 25-SEP-19 14:30:00 to 25-SEP-19 18:30:00 (PST-8)
Location: OGILBY
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms developed across the eastern portion of Imperial County during the afternoon hours on September 25th. Some of the stronger storms generated heavy rain, with peak rain rates in excess of one inch per hour. The heavy rain led to some flash flooding along Ogilby Road between State Route 78 and Interstate 8. According to the California Highway Patrol, at 1449PST flash flooding along Ogilby Road resulted in the road becoming closed from Interstate 8 through State Route 78 due to a flooded wash covering the road in between those points. Due to the road closure, no vehicles were able to drive through the flooded wash and no accidents were reported. A Flash Flood Warning was issued, but for areas to the north of the flooded wash.

Flash Flood in IMPERIAL, CALIFORNIA
From 25-SEP-19 19:30:00 to 25-SEP-19 22:00:00 (PST-8)
Location: BRAWLEY MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Scattered thunderstorms continued to develop across the central portions of Imperial County during the evening hours on September 25th. Some of the stronger storms generated very heavy rain with peak rain rates in excess of one inch per hour. The heavy rain resulted in some flash flooding that impacted portions of the Imperial Valley including the town of Brawley. According to a report from the public, at 1945PST flash flooding was occurring on 1st Street in Brawley. Water at least one foot deep was observed flowing over an embankment. There were no reports of accidents or injury due to the flooding. A Flash Flood Warning was in effect at the time of the report, and was initially issued at 1804PST.

Flash Flood in IMPERIAL, CALIFORNIA
From 25-SEP-19 15:30:00 to 25-SEP-19 18:30:00 (PST-8)
Location: CACTUS
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms developed across the eastern portion of Imperial County during the afternoon hours on September 25th. The stronger storms generated heavy rainfall with peak rain rates in excess of one inch per hour. The heavy rain resulted in some flash flooding that affected motorists on Ogilby Road to the south of State Route 78. According to the California Highway Patrol, at 1632PST flash flooding resulted in a vehicle being washed out along Ogilby Road just south of State Route 78, and about 10 miles east-northeast of the town of Glamis. The driver was not injured and was helped out of the vehicle. Additionally, 30 more vehicles were also stopped and stuck before a flowing wash in the vicinity. A Flash Flood Warning had been issued at 1436PST and was in effect at the time of the flooding.

Flash Flood in IMPERIAL, CALIFORNIA
From 25-SEP-19 15:00:00 to 25-SEP-19 19:30:00 (PST-8)
Location: PALO VERDE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms developed across the eastern portion of Imperial County during the afternoon hours on September 25th. Some of the stronger storms produced heavy rain, with peak rain rates in excess of one inch per hour. The heavy rain resulted in flash flooding along State Route 78 to the south-southwest of the town of Palo Verde. According to a report from the California Highway Patrol, at 1509PST flash flooding 10 miles southwest of Palo Verde forced the closure of State Route 78. The road was closed so that Caltrans would be able to clear debris off of the road. Flash flooding allowed water to rise 2.5 feet above the road at the Milpitas Wash Road.  Additionally, a bit earlier at 1427PST the California Highway Patrol indicated that State Route 78 was closed near Mile Marker 71 due to moderate flash flooding. There were no reports of accidents or injuries due to the flash flooding. A Flash Flood Warning was issued at 1500PST for areas just east of the flooding, and a second warning was put out at 1604PST that covered areas affected by the flooding.

Flash Flood in IMPERIAL, CALIFORNIA
From 25-SEP-19 15:30:00 to 25-SEP-19 18:30:00 (PST-8)
Location: GLAMIS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered showers and thunderstorms developed across eastern portions of Imperial County during the afternoon hours on September 25th. Some of the stronger storms generated very heavy rain with peak rain rates in excess of one inch per hour. The heavy rain led to some flash flooding around the town of Glamis. According to the California Highway Patrol, at about 1544MST flash flooding forced the closure of State Route 78 at Ted Kipf Road, about one mile east of town. No accidents were reported due to the flooding. A Flash Flood Warning had been issued prior to the report of the flash flooding.