Scattered to numerous thunderstorms developed and moved north across the southwest and west portion of the greater Phoenix area during the evening hours on August 2nd. In addition to gusty and damaging winds, many of the storms produced locally heavy rainfall; trained spotters measured peak rain rates in excess of 2 inches at times. The heavy rains led to episodes of flash flooding to the southwest of central Phoenix and in the Little Rainbow Valley located northeast of the Maricopa Mountains. Heavy rains and flash flooding forced the closure of Highway 238 near milepost 30, between Gila Bend and the town of Maricopa. Additionally, Rainbow Valley Road, 14 miles southeast of Buckeye, was closed due to swiftly flowing water across the road. A Flash Flood warning was issued during the evening due to the flooding along Highway 238. No injuries were reported due to the flash flooding.

Flash Flood in MARICOPA, ARIZONA
From 02-AUG-18 19:45:00 to 02-AUG-18 22:45:00 (MST-7)
Location: MOBILE
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Department of Highways

Scattered to numerous thunderstorms developed and moved north across the southwest and west portions of the Phoenix area during the evening hours on August 2nd; some of the stronger storms produced locally heavy rain fall with peak rain rates measured in excess of 2 inches per hour. The heavy rains led to some flash flooding of area roads to the southwest of central Phoenix during mid evening. According to Department of Highways personnel, at 2030MST Highway 238 was closed at Milepost 30 due to water across the road. Highway 238 is very prone to flash flooding; water often flows over the road during periods of heavy rain. At 1947MST a Flash Flood Warning was issued for the area due to the closed road and the warning continued until 2245MT. No injuries were reported due to the flash flooding.

Heavy Rain in PINAL, ARIZONA
From 02-AUG-18 17:30:00 to 02-AUG-18 21:00:00 (MST-7)
Location: STANFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scattered thunderstorms moved northward and across the south and southwest portions of the greater Phoenix area during the late afternoon and early evening hours on August 2nd. Some of the stronger storms generated heavy rains with peak rain rates measured to be in excess over 2 inches per hour. At 1751MST a trained spotter located about 7 miles southwest of Ak Chin Village measured 0.8 inches of rain within a 20 minute period. He also reported gusts to 45 mph which were sufficient to blow some items around the area. No significant damages were reported. Shortly thereafter another spotter about 1 mile further west measured 1.1 inches of rain within 30 minutes. The heavy rain led to the issuance of a Flood Advisory at 1800MST for the area southwest of the town of Maricopa down to the Interstate 8 corridor. No flash flooding was reported.

Flash Flood in MARICOPA, ARIZONA
From 02-AUG-18 21:30:00 to 03-AUG-18 01:00:00 (MST-7)
Location: LIBERTY
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms moved across the southwest portion of the greater Phoenix area during the evening hours on August 2nd and some of the stronger storms produced locally heavy rainfall; peak rainfall rates were measured in excess of 2 inches per hour at times. The heavy rain led to some flooding and flash flooding southwest of central Phoenix and in the Little Rainbow Valley northeast of the Maricopa Mountains. According to a report by the City of Goodyear Police, at 2200MST Rainbow Valley Road was closed about 2 miles south of Willis Road. The road was not passable due to significant amounts of water rushing across the road. The flooded road was located about 14 miles southeast of Buckeye. A Flash Flood Warning was not in effect at the time but a Flood Advisory had been issued earlier in the evening which expired at 2200MST.