A slow moving low pressure system brought several rounds of showers and thunderstorms across portions of south-central and southwestern Arizona throughout the day on the 15th. Strong southerly flow out ahead of the low pressure system brought in highly anomalous moisture content across the southern half of Arizona, with PWATs surging to 1.1-1.4, which are near record values for mid-October.  Along with the highly anomalous moisture values, moderate to high instability values were also present with MLCAPE rising to 1000-1500 J/KG. Bulk shear values between 25-35 kts were also present. The combination of the highly anomalous moisture content, instability, and shear along with the strong dynamic forcing to the east and north of the low pressure system was a recipe for these showers and thunderstorms to produce flash flooding as well as severe wind gusts and hail. The greatest flash flood impact occurred along portions of western Maricopa County in the area from Buckeye to Tonopah, The greatest damaging wind impact occurred in the Tonopah area, where two rounds of severe thunderstorms, one hour apart, impacted causing widespread power outages due to downed power poles, destroyed two mobile homes, damaged dairy farm structures, and resulted livestock losses. Severe hail was also reported with a storm that moved into the Mesa to Scottsdale area during the overnight period.
As the area of low pressure moved eastward on the 16th, lingering moisture resulted in the development of more showers and thunderstorms, mainly concentrated across the higher terrain areas east of Phoenix. One isolated storm in particular developed on a open field near Sun Lakes, resulting in the development of a short-lived landspout during the mid-afternoon hours with no damages reported.

Lightning in MARICOPA, ARIZONA
From 15-OCT-22 10:00:00 to 15-OCT-22 10:00:00 (MST-7)
Location: ENNIS
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A video showed a significant fire broke out on top of the roof of a home in the area of Happy Valley Road and 95th Avenue in Peoria due to lightning. Timing estimated from radar. No injuries were reported.

Flash Flood in PINAL, ARIZONA
From 15-OCT-22 12:45:00 to 15-OCT-22 14:45:00 (MST-7)
Location: BAPCHULE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media video taken from Queen Creek showed a significant water current several inches deep flowing in the area just south of the San Tan Mountains. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 14:09:00 to 15-OCT-22 15:09:00 (MST-7)
Location: PHOENIX TURF ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported on I-17 near Bell Road in Phoenix. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 18:00:00 to 15-OCT-22 22:00:00 (MST-7)
Location: BOSQUE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media report showed slow traffic on SR-238, between mile markers 23 to 40 due to flooding on roadway. Timing estimated from radar. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 17:39:00 to 15-OCT-22 17:39:00 (MST-7)
Location: CHANDLER HGTS
Magnitude: 61.00 EG
Property damage: 18.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power poles, 18 approximately, affected 52 customers in an area between S Higley Road and S Mandarin Drive and between E San Tan Blvd and W San Dance Drive. Winds were estimated at around 70 mph based on radar data. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 18:45:00 to 16-OCT-22 04:00:00 (MST-7)
Location: TONOPAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Winters Wash in Tonopah showed flow going above alarm stage (1.28 feet) between 18:06 and 18:08 MST, with the flow going above the bankfull stage (3.32 feet) at 18:38 MST and peaking at 4.27 feet (1400 cfs) at 19:18 MST. The flow went below bankfull at 22:49 MST and below alarm stage at 01:43 MST on the 16th. Roads intersecting the wash that were affected from the flow along Winters Wash included Indian School Road, located 1.1 miles downstream of the gauge, and along Salome Highway south of I-10 located 4.6 miles downstream of the gauge. Along Indian School Road, there were reports at around 19:37 MST from a trained spotter of many cars stranded and it is unknown whether or not any of the vehicles sustained damage. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 21:10:00 to 15-OCT-22 22:30:00 (MST-7)
Location: CRAG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Cruff Wash showed flow going above alarm stage (2.5 feet) between 20:29 and 20:31 MST, reaching a peak flow of 3.25 feet (448 cfs) at 21:13 MST. Flooding along the wash likely occurred at Agua Caliente Road, located about 2 miles downstream. Flow fell below alarm stage between 21:42 and 21:48 MST. No damages or injuries were reported.

Lightning in MARICOPA, ARIZONA
From 15-OCT-22 14:00:00 to 15-OCT-22 14:00:00 (MST-7)
Location: BEARDSLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A 12 year old girl, who lives in the Sun City West Retirement Community, was struck by lightning while playing outside, causing her heart to stop. Her father was able to successfully resuscitate her. The girl was taken to the hospital afterwards. Timing of the lightning strike was estimated by radar.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 19:07:00 to 15-OCT-22 23:00:00 (MST-7)
Location: VALENCIA
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Social Media

Social media videos showed water entering homes from backyards being flooded in the area of roadway MC 85 and East Baseline Road. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 18:00:00 to 15-OCT-22 19:00:00 (MST-7)
Location: GLADDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge located along Tiger Wash reported water levels along the wash going above alarm stage (5.9 feet) at 16:48 MST, with water levels peaking at 6.06 feet (587 cfs) at 16:57 MST. Flow went below alarm stage at 17:17 MST. Flooding from the wash would have occurred 3.5 miles downstream along Eagle Eye Road 65 minutes later, at around 18:00 MST. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 18:49:00 to 15-OCT-22 18:49:00 (MST-7)
Location: BUCKEYE MUNI ARPT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power poles in Wintersburg affecting 41 customers were reported Between Buchanan Street to Yuma Road and between Powers Butte Road to Johnson Road. Winds were estimated at around 70 mph. No injuries were reported.

Tornado in PINAL, ARIZONA
From 16-OCT-22 15:00:00 to 16-OCT-22 15:05:00 (MST-7)
Location: OCOTILLO
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several pictures and videos from the public and trained spotters showed a brief landspout, lasted about 5 minutes, touching down over the open field just south of Sun Lakes. Unknown how strong it was given that it was over an open field, however, based on climatology, it was rated an EF-0. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 13:08:00 to 15-OCT-22 13:08:00 (MST-7)
Location: HELENA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter recorded a 64mph wind gust with a handheld anemometer in the area of East Baseline Road and South Rural Road in Tempe. No damages or injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 15-OCT-22 15:00:00 to 15-OCT-22 18:00:00 (MST-7)
Location: EHRENBURG
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Video from a storm chaser showed flash flooding washing away Mohave Road. The location of the flooding was about 6-7 miles north of I-10, just northeast of Blythe, CA. Timing estimated from radar. No injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 18:46:00 to 15-OCT-22 22:46:00 (MST-7)
Location: BUCKEYE PIERCE ARPT
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pictures were sent in from a trained spotter of water entering the Adelante Healthcare facility and some of the downtown stores in Buckeye. Water was estimated to be 6 to 8 inches deep. No injuries were reported.

Flash Flood in LA PAZ, ARIZONA
From 15-OCT-22 14:55:00 to 15-OCT-22 16:55:00 (MST-7)
Location: QUARTZSITE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported on US-95 near Milepost 104 in Quartzsite. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 23:30:00 to 16-OCT-22 15:00:00 (MST-7)
Location: ARLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Centennial Wash at the Union Pacific Railroad showed flow going above alarm stage (8.5 feet) between 21:53 and 21:56 MST and continuing to rise for several hours more to reach a peak flow of 13 feet (4315 cfs) at 02:06 MST on the 16th. Flooding along the wash likely occurred along the Old US Highway 80, located 6 miles downstream. Flow fell below alarm stage at 13:34 MST on the 16th. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 21:00:00 to 16-OCT-22 09:00:00 (MST-7)
Location: LIBERTY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Waterman Wash at Rainbow Valley Road showed flow going above alarm stage (3.3 feet) between 19:28 and 20:07 MST and continuing to rise for several hours more to reach a peak flow of 7.25 feet (1700 cfs) at 23:38 MST. Flooding along the wash likely occurred along Tuthill Road, located 3.2 miles downstream and Narramore Road, located 6.4 miles downstream. Flow fell below alarm stage at 07:03 MST on the 16th. A truck was swept off Narramore Road due to the strong current from the wash. There was no information received about the occupants that were inside the truck.

Thunderstorm Wind in YUMA, ARIZONA
From 15-OCT-22 13:45:00 to 15-OCT-22 13:45:00 (MST-7)
Location: FISHERS LNDG
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A Yuma Proving Ground Station measured a 68 mph wind gust.

Hail in MARICOPA, ARIZONA
From 16-OCT-22 01:25:00 to 16-OCT-22 01:25:00 (MST-7)
Location: PARADISE VLY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hailstones up to 2 inches in diameter reported near 64th St. and Shea Blvd in Paradise Valley. No damages or injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 19:07:00 to 15-OCT-22 19:07:00 (MST-7)
Location: TONOPAH
Magnitude: 59.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Tonopah measured a 68 mph gust using a handheld anemometer. Spotter also reported pea-sized hail. There was wind damage to roof of nearby shed. 20-30 feet of roof beams and tin sheets were laying in the driveway as well as awning damage on a bus. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 17:40:00 to 15-OCT-22 17:40:00 (MST-7)
Location: WINTERSBURG
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed powerlines affecting 252 customers were reported in an area between the Hassayampa River to Elliot Road to 355th Avenue to Wintersburg Road in Wintersburg. Winds were estimated at around 70 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 18:05:00 to 15-OCT-22 18:05:00 (MST-7)
Location: TONOPAH
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Utility Company

Downed power poles in Tonapah affecting 96 customers were reported in an area between 425th Drive to 411th Ave and between Glendale Avenue and I-10. Winds were estimated at around 70 mph. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 19:03:00 to 15-OCT-22 19:03:00 (MST-7)
Location: TONOPAH
Magnitude: 70.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Severe wind damage occurred from a thunderstorm microburst in the Tonopah area from the second of two storms that passed through the area. Some of the damages included: two mobile homes destroyed; damage to some of the structures at the Belmont Dairy Farm (specifically a milking barn), which had some damage to some of the cow enclosures as well; 3 destroyed AC unit condensers; creosote bushes being fully defoliated in a field; and several large downed trees. Downed power poles affecting 121 customers were reported by the utility company in an area between 379th Avenue and 355th Avenue and between Missouri Avenue and I-10. There was also loss of livestock (unknown how many or type). Winds were estimated at around 80 mph. Timing estimated from radar.

Hail in MARICOPA, ARIZONA
From 16-OCT-22 00:45:00 to 16-OCT-22 00:45:00 (MST-7)
Location: MESA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hailstones up to 1.5 inches in diameter reported near Brown Road and Gilbert Road in Mesa. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 16-OCT-22 01:30:00 to 16-OCT-22 01:30:00 (MST-7)
Location: SCOTTSDALE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hailstones up to 1.5 inches in diameter were reported in the area of East McDonald Drive and North 86th street in Paradise Valley. No damages or injuries were reported.

Flash Flood in PINAL, ARIZONA
From 15-OCT-22 12:38:00 to 15-OCT-22 13:38:00 (MST-7)
Location: SACATON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported in the area of SR-387 and SR-187 in Sacaton. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 19:00:00 to 16-OCT-22 03:00:00 (MST-7)
Location: COTTON CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Rainbow Wash reported flow rising to above alarm stage (1.4 feet) between 17:21 and 17:25 MST, exceeding the bankfull stage (4.1 feet) between 18:17 and 18:27 MST and peaking at 4.42 feet (2368 cfs) at around 18:55 MST. Any flooding impacts from the wash included Old US-80 and Patterson Road, located about 5.6 miles downstream. The wash went below bankfull stage at around 19:31 MST, before another rise above the bankfull stage occurred at around 23:02 MST. The flow did not go below action stage until around 00:47 MST on the 16th.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 13:45:00 to 15-OCT-22 13:45:00 (MST-7)
Location: TOLLESON
Magnitude: 64.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Trained Spotter sent pictures of a couple of trees, with branches snapped, along with a large uprooted tree that fell onto an SUV causing some damage to the vehicle near the Love Truck Stop Station located just south of I-10 in Tolleson. TPHX terminal doppler radar measured over 70 mph in the area. No injuries were reported.

Thunderstorm Wind in MARICOPA, ARIZONA
From 15-OCT-22 18:55:00 to 15-OCT-22 18:55:00 (MST-7)
Location: WINTERSBURG
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power pole blown over due to thunderstorm winds in the area of Wintersburg Road and Latham Street near Tonopah. Winds were estimated at around 70 mph. Timing estimated from radar. No injuries were reported.

Hail in MARICOPA, ARIZONA
From 16-OCT-22 01:35:00 to 16-OCT-22 01:35:00 (MST-7)
Location: PARADISE VLY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Report of quarter sized hail near Scottsdale Road and Doubletree Ranch Rd in Paradise valley. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-OCT-22 23:30:00 to 16-OCT-22 06:30:00 (MST-7)
Location: WINTERSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along Delaney Wash showed flow going above alarm stage (1.87 feet) between 22:51 and 22:53 MST, with a peak flow of 2.3 feet (255 cfs) at 23:07 MST. Flooding along the wash likely occurred along 411th Avenue, located 2.1 miles downstream and Salome Highway, located 3.7 miles downstream. Flow fell below alarm stage between 5:05 and 5:51 MST on the 16th. No damages or injuries were reported.

Thunderstorm Wind in PINAL, ARIZONA
From 15-OCT-22 17:15:00 to 15-OCT-22 17:15:00 (MST-7)
Location: MAGMA
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet station located at San Tan Valley measured a 69 mph wind gust.

Flash Flood in MARICOPA, ARIZONA
From 16-OCT-22 02:40:00 to 16-OCT-22 04:40:00 (MST-7)
Location: PHOENIX TURF ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Streamflow Gauge along East Fork Cave Creek near 7th Avenue showed the flow going above alarm stage (2 feet) at around 2:36 MST, peaking at 3.33 feet (1239 cfs) at 3:05 MST, and dropped below alarm stage between 4:01 and 4:36 MST. Flooding likely occurred at the low water crossing along 7th Avenue. No damages or injuries were reported.

Hail in MARICOPA, ARIZONA
From 15-OCT-22 23:45:00 to 15-OCT-22 23:45:00 (MST-7)
Location: QUEEN CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hailstones up to 1 inch in diameter reported near Ellsworth Rd. and Riggs Rd in Queen Creek. No damages or injuries were reported.

Flash Flood in GILA, ARIZONA
From 16-OCT-22 12:30:00 to 16-OCT-22 15:30:00 (MST-7)
Location: MIAMI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A video showed flooding occurring from Bloody Tanks. Water was reaching the bottom of a bridge as well as going around it, briefly trapping the person recording the incident. The location of the incident was in the area of Schulze Ranch Road and U.S. 60. Timing estimated from radar. No damages or injuries were reported.