Scattered monsoon thunderstorms developed across much of the greater Phoenix area during the evening hours on July 16th and they generated a number of the typical seasonal weather hazards. Strong gusty outflow winds in excess of 50 mph were produced by some of the storms which led to tree and street sign damage in north Scottsdale as well as tree damage in Guadalupe. Uprooted trees in Guadalupe fell and damaged cars at Arizona Mills Mall. At 2210MST a wind gust to 61 mph was measured at Phoenix Sky Harbor airport, one of several gusts measured at over 60 mph in the area. Heavy rain was common with many of the storms, with rain rates in excess of one inch per hour leading to urban street flooding in central Phoenix, Deer Valley and Gilbert. Isolated episodes of flash flooding were also observed including downtown Phoenix where excessive rain flooded the 7th street exit at Interstate 10.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 22:00:00 to 16-JUL-17 22:00:00 (MST-7)
Location: LITCHFIELD PARK
Magnitude: 60.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorms developed over the central and western portion of  the greater Phoenix area during the evening hours on July 16th; some of the stronger storms produced strong damaging outflow winds which impacted the community of Litchfield Park. According to a broadcast media report, at 2200MST gusty winds estimated at 60 mph downed several trees. One of the fallen trees knocked down part of a block wall. The damage occurred near the intersection of West Indian School Road and North Dysart Road, approximately 2 miles southeast of Litchfield Park.  No injuries were reported due to the downed trees.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 22:10:00 to 16-JUL-17 22:10:00 (MST-7)
Location: (PHX)SKY HARBOR ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Strong thunderstorms developed over central portions of the greater Phoenix area during the late evening hours and some of them produced strong and gusty outflow winds. A wind gust of 61 mph was measured at the Phoenix Sky Harbor ASOS at 2210MST. This is the official weather station for Phoenix.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 22:25:00 to 16-JUL-17 22:25:00 (MST-7)
Location: (LUF)LUKE AFB
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Strong thunderstorms developed over the central and western portion of the greater Phoenix area during the late evening hours on July 16th and some of them produced strong gusty outflow winds. At 2225MST the AWOS weather station at Luke Air Force Base measured a wind gust of 59 mph. This was one of several gusts to at least 60 mph measured in the greater Phoenix area during the evening hours.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 22:20:00 to 16-JUL-17 22:30:00 (MST-7)
Location: WEST CHANDLER
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorms developed across the southeast portion of the greater Phoenix area during the late evening hours on July 16th; some of them affected the community of Guadalupe. The storms produced strong, gusty and damaging outflow winds estimated to be in excess of 60 mph. According to local broadcast media, at 2220MST gusty winds uprooted a tree which fell and damaged a parked vehicle at the Arizona Mills Mall, about 1 mile north of Guadalupe. Shortly thereafter, at 2230MST, a very large tree was uprooted and it fell on several cars as well as a parking structure located about 3 miles southwest of Guadalupe. This was also reported by local media.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 21:05:00 to 16-JUL-17 21:05:00 (MST-7)
Location: CAREFREE
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong thunderstorms developed across the higher terrain to the northeast of Phoenix during the evening hours on July 16th, and some of them produced strong gusty outflow winds in excess of 60 mph. According to a mesonet weather station at the Horseshoe Reservoir, at 2105MST a wind gust was measured at 69 mph. This was one of the highest gusts recorded across south-central Arizona during the evening hours.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 16:55:00 to 16-JUL-17 16:55:00 (MST-7)
Location: FOUNTAIN HILLS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Strong thunderstorms developed near Fountain Hills during the afternoon hours and some of them produced strong outflow winds. According to a report from a local CO-OP observer, at 1655MST a wind gust of 60 mph was measured at the station which was located 2 miles east of Fountain Hills. Damage was not reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 22:15:00 to 16-JUL-17 22:15:00 (MST-7)
Location: GOMEZ ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong thunderstorms developed over the central and southern portion of the greater Phoenix area during the late evening hours on July 16th. Some of the storms produced strong outflow winds. According to a mesonet weather station report, a wind gust to 61 mph was measured 5 miles southwest of central Phoenix.

Heavy Rain in MARICOPA, ARIZONA
From 16-JUL-17 22:00:00 to 16-JUL-17 23:30:00 (MST-7)
Location: PHOENIX TURF ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scattered thunderstorms developed across the northern portions of the greater Phoenix area during the evening hours and some of them affected the community of Deer Valley. Locally heavy rainfall occurred in the area with rain rates measured in excess of one inch per hour. At 2248MST a trained spotter 6 miles southeast of Deer Valley measured 0.53 inches of rain within a 30 minute period and it resulted in curb-to-curb flooding. at 2315MST another trained spotter nearby measured 0.86 inches of rain. The urban street flooding resulted in hazardous driving conditions for area motorists.

Flash Flood in MARICOPA, ARIZONA
From 16-JUL-17 22:00:00 to 17-JUL-17 01:00:00 (MST-7)
Location: PHOENIX
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Scattered thunderstorms developed across much of the greater Phoenix area during the evening hours on July 16th, and some of the stronger storms produced locally heavy rain which fell across central portions of Phoenix including the downtown area. Rain rates between one and two inches per hour occurred and this led to flash flooding in downtown Phoenix. Heavy rain had already fallen by 2200MST and at 2229MST a Flash Flood Warning was issued for much central Phoenix. At 2246MST a trained spotter 2 miles north of central Phoenix measured 0.71 inches within 21 minutes. According to the Department of Highways, at 2237MST flash flooding occurred 1 mile northeast of Phoenix in the central downtown area; the 7th Street exit off of Interstate 10 was flooded by the torrential rains. The Flash Flood Warning remained in effect until the early morning hours on the next day.

Flash Flood in MARICOPA, ARIZONA
From 16-JUL-17 22:00:00 to 17-JUL-17 01:00:00 (MST-7)
Location: FENNEMORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scattered thunderstorms developed across much of the greater Phoenix area during the evening hours on July 16th and some of the stronger storms produced locally heavy rainfall with peak rain rates between one and two inches per hour. Heavy rain fell across the western portion of the Phoenix area and resulted in minor flash flooding near Luke Air Force Base during the late evening hours. The heavy rains led to the issuance of a Flash Flood Warning as early as 2230MST and this warning persisted into the early morning hours the next day. At midnight, trained weather spotters 1 mile northeast of Luke Air Force Base reported flash flooding; Olive and Litchfield Roads near Luke AFB were inundated with water resulting in curb to curb flooding. Additionally, the Litchfield/Northern underpass was flooded.

Heavy Rain in MARICOPA, ARIZONA
From 16-JUL-17 22:00:00 to 17-JUL-17 01:00:00 (MST-7)
Location: FALFA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scattered thunderstorms developed across much of the greater Phoenix area during the evening hours on July 16th; the stronger storms produced locally heavy rain with peak rain rates between one and two inches per hour. The heavy rain led to episodes of urban as well as flash flooding, primarily over central and western portions of the greater Phoenix area such as downtown Phoenix. Still, heavy rain fell over portions of the southeast valley as well including the community of Gilbert; this produced urban flooding but no flash flash flooding. According to a trained spotter 3 miles west of Gilbert, heavy rains resulted in curb to curb flooding near the intersection of Arizona Avenue and Elliot Road.

Thunderstorm Wind in MARICOPA, ARIZONA
From 16-JUL-17 21:36:00 to 16-JUL-17 21:36:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorms developed over portions of Scottsdale during the late evening hours on July 16th and they generated strong gusty outflow winds estimated to be in excess of 60 mph. According to a trained weather spotter, at 2136MST wind gusts estimated at 65 mph blew down 8 to 10 trees which were 5 to 8 inches in diameter. The trees were located just north of the Scottsdale airport near Frank Lloyd Wright Boulevard. In addition, the winds downed street signs in northeast Scottsdale. A Severe Thunderstorm Warning was issued for the area at 2135MST and it remained in effect through 2200MST.