Scattered to numerous showers and thunderstorms developed across much of south-central Arizona, including the greater Phoenix metropolitan area, during the morning hours on July 24th. Many of the storms produced locally heavy rainfall with peak rain rates in excess of two inches per hour, and this led to episodes of flooding and flash flooding across the lower deserts. At 0938MST a mesonet weather station 5 miles west of the Ahwatukee Foothills measured 2.09 inches of rain within one hour. Flash flooding occurred in Apache Junction; the Weekes wash experienced flash flooding due to very high flow, and a live swift water rescue occurred at 0917MST about 1 mile southwest of Apache Junction. Flash flooding in Sacaton partially submerged a truck and washed away several palm trees. Flooding persisted into the early afternoon hours across the east and southeast portions of the Phoenix area; at about 1400MST many roads near Santan were flooded and closed and shortly afterwards, multiple lanes of an intersection were closed due to flooding 5 miles east of East Mesa. Flash Flooding also occurred over far west Phoenix in the towns of Tonopah and Wintersburg; washes  such as the Delaney Wash were impassable due to high water shortly after noon.

Flash Flood in PINAL, ARIZONA
From 24-JUL-17 08:15:00 to 24-JUL-17 12:55:00 (MST-7)
Location: APACHE JCT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorms with locally heavy rainfall developed across the eastern portion of the greater Phoenix area during the morning hours and the intense rainfall eventually led to episodes of flash flooding which affected the community of Apache Junction. A trained spotter just southeast of Apache Junction reported heavy rain at 0612MST which had already caused minor street flooding. Intense rain continued in the area with peak rain rates approaching 2 inches per hour at times. A Flash Flood Warning was issued for areas including Apache Junction at 0719MST and at 0917, local broadcast media reported that a live swift water rescue was underway at 16th Avenue at Saguaro, approximately 1 mile southwest of Apache Junction. No injuries were reported due to this flash flooding.

Flash Flood in PINAL, ARIZONA
From 24-JUL-17 07:30:00 to 24-JUL-17 10:15:00 (MST-7)
Location: SACATON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with locally heavy rainfall developed across much of the greater Phoenix area during the morning hours on July 24th, and with peak rain rates reaching 2 inches per hour at times, episodes of flash flooding developed as a result. One of the communities affected by flash flooding was the town of Sacaton, to the southeast of Phoenix. According to a report from the public, at 0900MST flash flooding occurred about 3 miles southeast of Sacaton; flood waters partially submerged a truck and they also washed away a number of palm trees located roughly at Sacaton and highway 87. A Flash Flood Warning was in effect at the time, but it was slightly north of the location of the flash flooding, over portions of Apache Junction and Queen Creek.

Flash Flood in MARICOPA, ARIZONA
From 24-JUL-17 09:00:00 to 24-JUL-17 12:00:00 (MST-7)
Location: PERRYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms with locally heavy rainfall developed across much of the greater Phoenix area, including the western communities such as Goodyear, during the morning hours on July 24th. Peak rain rates reached to at least 2 inches per hour with some of heavier showers and this intense rainfall resulted in episodes of flooding and flash flooding during the morning hours. According to local law enforcement, at 1030MST flash flooding occurred about 2 miles northwest of Goodyear. Cotton Lane near McDowell Road was closed due to the flash flooding. No injuries were reported however. A Flash Flood Warning was in effect at the time of the flash flooding.

Flood in PINAL, ARIZONA
From 24-JUL-17 13:00:00 to 24-JUL-17 16:00:00 (MST-7)
Location: CASA BLANCA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms with locally heavy rainfall developed over much of the east and southeast portions of the greater Phoenix area during the morning hours on July 24th; peak rain rates as high as 2 inches per hour were observed and this led to episodes of flash flooding which continued into the early afternoon. One of the areas affected by the heavy rain was the community of Santan, to the southeast of Phoenix. After the initial, flash flood producing rains had subsided, considerable water was left behind, inundating roads and leading to episodes of areal flooding. At 1358MST an Emergency Manager reported that many roads in the area around Santan were flooded and closed. Additionally, a Maricopa County stream gage around 3 miles northwest of Santan indicated that flood stage had been exceeded. Flooding continued into the afternoon hours before the water subsided.

Flood in MARICOPA, ARIZONA
From 24-JUL-17 13:00:00 to 24-JUL-17 16:00:00 (MST-7)
Location: DESERT SANDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms with heavy rain developed across the eastern portion of the greater Phoenix area during the morning hours on July 24th, affecting communities such as Mesa and Apache Junction. Peak rain rates with the stronger storms reached 2 inches per hour and this resulted in episodes of morning flash flooding. After the initial flash flood producing rains subsided, there was significant water remaining which resulted in lingering flooding over portions of Mesa. According to local law enforcement, at 1430MST multiple lanes of an intersection were closed due to high water, approximately 5 miles southeast of East Mesa. Areal flood warnings were not in effect at the time.

Flash Flood in MARICOPA, ARIZONA
From 24-JUL-17 11:50:00 to 24-JUL-17 17:45:00 (MST-7)
Location: TONOPAH
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mesonet

Scattered to numerous showers and thunderstorms developed across much of the greater Phoenix area during the morning hours on July 24th, and some of the heavier rainfall affected the far western portions including the towns of Tonopah and Wintersburg. During the late morning hours, rain gauges in the area reported amounts of up to around two inches and this resulted in episodes of flash flooding as area washes ran heavily and flowed across area roads making them impassible. As of 1150MST, stream gages reported significant flow in both the Waterman Wash and the Delaney Wash. At 1228MST flash flooding was observed 3 miles south of Tonopah; according to a  Maricopa County Flood Control stream gage the Delaney Wash at 411th Avenue was impassible due to flood waters. At about 1300MST another stream gage reported that the Delaney Wash 3 miles northwest of Wintersburg was flooding and impassible at the Salome Highway. A Flash Flood Warning was in effect for the area at the time of the flooding; it was issued at 1152MST and remained in effect through 1445MST. Due to continued flow in the area washes, the Flash Flood Warning was re-issued for the same area and remained in effect through 1745MST.