Scattered to numerous showers and thunderstorms overspread much of south central Arizona during the afternoon and evening hours on August 2nd. Due to very moist and unstable conditions, the stronger thunderstorms that formed produced a variety of significant and severe weather, including damaging winds, large hail, very heavy rain, flooding and flash flooding. Public reports along with mesonet station readings indicated rainfall totals between three and four inches; the heavy rain led to road closures, flooding of underpasses and necessitated swift water rescues near the community of Cave Creek. Multiple Urban and Small Stream Advisories as well as Flood and Flash Flood Warnings were issued during the afternoon and evening hours. During the late afternoon, gusty thunderstorm outflow winds downed several power poles near Fountain Hills, and large hail was reported in central Phoenix.

Flash Flood in MARICOPA, ARIZONA
From 02-AUG-16 16:45:00 to 02-AUG-16 20:15:00 (MST-7)
Location: GLENDALE MUNI ARPT
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Numerous thunderstorms developed across the greater Phoenix metropolitan area during the afternoon hours and they persisted into the evening; the stronger storms produced intense rain with peak rain rates in excess of 4 inches per hour. The heavy rain led to episodes of flash flooding which impacted the central portion of the Phoenix area including the Interstate 17 corridor north of Grand Avenue. According to a report from the public, at 1753MST flash flooding along Interstate 17 at the Indian School underpass resulted in a water rescue. No injuries were reported. Additionally, a mesonet weather station 3 miles northeast of central Phoenix, near the Phoenix County Club, measured 2.1 inches of rain within 30 minutes ending at 1739MST. The mesonet station was part of the Maricopa County Flood Control gauge network.

Flood in PINAL, ARIZONA
From 02-AUG-16 18:30:00 to 02-AUG-16 23:00:00 (MST-7)
Location: LIRIM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorms with very heavy rain moved across portions of the south central deserts including communities to the south of the greater Phoenix area including Maricopa. The storms produced locally heavy rain and areal flooding during the evening hours on August 2nd. According to the Arizona Department of Highways, flooding caused State Route 238 to become closed between the town of Maricopa and Gila Bend at mile marker 40 at 2103MST. An Urban and Small Stream Flood Advisory had been issued for the area starting at 1826MST and it was in effect through 2130MST. No additional flood warnings or advisories were issued for the area.

Hail in MARICOPA, ARIZONA
From 02-AUG-16 17:25:00 to 02-AUG-16 17:25:00 (MST-7)
Location: PHOENIX
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorms moved across the greater Phoenix area during the afternoon hours on July 2nd and in addition to very heavy rain, some of the storms produced large hail. At 1725MST a trained weather spotter located 2 miles northeast of central Phoenix measured a hailstone with a diameter of 3/4 inches. The hailstone was observed just to the northeast of the intersection of East McDowell Road and Highway 51.

Flash Flood in MARICOPA, ARIZONA
From 02-AUG-16 16:00:00 to 02-AUG-16 19:15:00 (MST-7)
Location: CAVE CREEK
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorms developed across the northeastern portion of the greater Phoenix metropolitan area during the afternoon hours on August 2nd and they affected communities such as Carefree, Cave Creek and Paradise Valley. The storms produced intense rainfall with peak rain rates in excess of one inch per hour; this resulted in flash flooding near Cave Creek. According to a report from local broadcast media, at 1729MST flash flooding 6 miles southwest of Cave Creek necessitated a swift water rescue for a vehicle stuck in water. The rescue was trapped in the vicinity of East Carefree Highway and North 3rd Street.

Flood in MARICOPA, ARIZONA
From 02-AUG-16 20:15:00 to 02-AUG-16 23:15:00 (MST-7)
Location: PHOENIX FARM AERO AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms with very heavy rainfall moved across the greater Phoenix metropolitan area during the evening hours on August 2nd and they especially impacted the Interstate 17 corridor north of central Phoenix. Intense rain was observed with peak rain rates in excess of 4 inches per hour at times; this initially led to flash flooding which was followed by areal flooding. A mesonet rain gage 5 miles north of central Phoenix, near the intersection of Interstate 17 and West Camelback road, measured 2.91 inches of rain ending at about 1900MST. This led to flash flooding and water rescues at the Indian School underpass and Interstate 17. The heavy rains then resulted in continued areal flooding along the Interstate 17 corridor and an Areal Flood Warning was issued at 2015MST which remained in effect through 2315MST. Local law enforcement reported the continued flooding along Interstate 17 at Indian School Road and this was the basis for the Areal Flood Warning.

Thunderstorm Wind in MARICOPA, ARIZONA
From 02-AUG-16 18:00:00 to 02-AUG-16 18:00:00 (MST-7)
Location: FOUNTAIN HILLS
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms moved across the greater Phoenix area, including the community of Fountain Hills, during the afternoon hours on July 2nd. Some of the stronger storms generated gusty and damaging outflow winds estimated to be as high as 70 mph. At 1800MST a trained spotter located about 5 miles southwest of the town of Fountain Hills reported that four power poles were blown down. The downed poles were located at the intersection of 136th Street and Shea Boulevard.