Scattered to numerous thunderstorms developed across the greater Phoenix area during the morning hours on August 13th and they produced locally heavy rainfall which led to a number of flash flooding episodes that affected communities such as Surprise, Glendale and Tempe. Intense rainfall with peak rain rates over one inch per hour was more than sufficient to produce flash flooding in Phoenix, especially given the urban nature of the surface which is largely ground covered by impermeable concrete and asphalt. The flash flooding led to a number of road closures and resulted in a number of water rescues including one at Interstate 10 and Ray Road and another at Interstate 10 and 75th Avenue in downtown Phoenix. Multiple Flash Flood Warnings were issued and fortunately there were no injuries reported due to the flooding.

Flash Flood in MARICOPA, ARIZONA
From 13-AUG-17 02:00:00 to 13-AUG-17 05:00:00 (MST-7)
Location: GLENDALE
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Scattered thunderstorms developed across the greater Phoenix area during the early morning hours on August 13th and some of the stronger storms affected the western portion including the community of Glendale. Locally heavy rainfall occurred with peak rain rates in excess of one inch per hour and that was more than sufficient to cause flash flooding in the highly urbanized communities. According to a report from local broadcast media, at 0300MST flash flooding had flooded several neighborhood streets about 1 mile west of Glendale and around the intersection of West Glendale Avenue and North 71st Avenue. The water level had climbed roughly halfway up the car tires on the streets. About 15 minutes later, at 0318MST, local law enforcement reported that flash flooding had required a water rescue near the intersection of North 67th Avenue and West Bethany Home Road, approximately one mile southwest of Glendale. No injuries were reported due to the flash flooding. A Flash Flood Warning was in effect at the time of the flooding; it was issued at 0200MST and remained in effect through 0500MST.

Flash Flood in MARICOPA, ARIZONA
From 13-AUG-17 02:00:00 to 13-AUG-17 05:00:00 (MST-7)
Location: TOLLESON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms developed across the greater Phoenix area during the early morning hours on August 13th and some of the stronger storms affected central Phoenix including the downtown area. The primary weather hazard was heavy rain with flash flooding; peak rain rates in excess of one inch per hour were more than sufficient to cause flash flooding in the highly urbanized downtown area. According to local law enforcement, at 0226MST flash flooding resulted in a water rescue at the intersection of Interstate 10 and North 75th Avenue approximately 2 miles east of the town of Tolleson. No injuries were reported. A Flash Flood Warning was in effect at the time of the rescue; it was issued at 0200MST and was in effect through 0500MST.

Flash Flood in MARICOPA, ARIZONA
From 13-AUG-17 06:00:00 to 13-AUG-17 08:45:00 (MST-7)
Location: BEARDSLEY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Scattered thunderstorms developed across the northwestern portion of the greater Phoenix area during the morning hours on August 13th and the stronger storms produced locally heavy rains with peak rain rates between one and two inches per hour. The intense rains led to episodes of flash flooding to the northwest of the town of Sun City West. According to a report from the Department of Highways and the city of Surprise, heavy rains from early morning storms forced the closure of Jomax Road west of 163rd Avenue due to flash flooding. The flooding was east of Highway 60 and northwest of the Loop 303 freeway, about 2 miles northwest of Beardsley.

Flash Flood in MARICOPA, ARIZONA
From 13-AUG-17 06:00:00 to 13-AUG-17 08:45:00 (MST-7)
Location: BEARDSLEY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Scattered thunderstorms developed across the greater Phoenix area during the morning hours on August 13th and some of the stronger storms affected the west and northwestern communities such as Surprise and Waddell. The storms generated locally heavy rains with peak rain rates between one and two inches per hour, which was more than sufficient to cause episodes of flash flooding over the highly urbanized surfaces. According to a report from the Department of Highways and the city of Surprise, flash flooding from the earlier morning storms led to the closure of Sarival Road south of Bell Road, approximately 2 miles northwest of Waddell and just west of Surprise. The road was closed as of 0700MST. At the same time, another public report indicated that flash flooding also closed Cotton Lane between Cactus Road and Peoria Avenue, about 2 miles southwest of Waddell and just west of the Loop 303 freeway. A Flash Flood Warning was in effect at the time; it was issued at 0541MST and was in effect through 0845MST.

Flash Flood in MARICOPA, ARIZONA
From 12-AUG-17 23:30:00 to 13-AUG-17 01:45:00 (MST-7)
Location: WEST CHANDLER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Scattered thunderstorms developed over portions of the greater Phoenix area, including the southeastern communities, during the late evening hours on August 12th and they persisted into the early morning hours on August 13th. Some of the stronger storms produced locally heavy rainfall which led to an episode of flash flooding in far south Tempe shortly after midnight. Despite rainfall rates typically less than one inch per hour, they were sufficient to cause flooding problems along Interstate 10 near Ray Road. According to local law enforcement, at 0111MST a water rescue was performed near Interstate 10 and Ray Road. No accidents or injuries were reported. A Flash Flood Warning was not in effect, instead a Flood Advisory had been issued at 2238MST the previous day and it was valid through 0145MST on the 13th.

Flood in MARICOPA, ARIZONA
From 13-AUG-17 08:00:00 to 13-AUG-17 12:00:00 (MST-7)
Location: MOBILE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorms developed over the southern portion of the greater Phoenix area during the early morning hours on August 13th and some of them produced locally heavy rains along highway 238 running from the town of Maricopa westwards towards Gila Bend. There are many washes that cross the highway and even modest amounts of heavy rain cause them to flow swiftly and across the highway, forcing temporary closure of the road. The heavier rains ended by around 0300MST but flooding issues lingering through the mid morning hours. According to the department of highways, at 0915MST highway 238 was closed in the vicinity of the town of Mobile. The portions closed included from milepost 1 to 7 and from 32 to 40. A Flood Advisory for the area had ended many hours earlier in the morning.