Thunderstorms developed across much of the greater Phoenix area during the afternoon and evening hours on October 23rd. Many of the stronger storms formed over the northern half of the metropolitan area, including communities from north Scottsdale and Carefree to Glendale, Peoria and areas north of Sun City West. Many of the strong storms produced large hail, with diameters typically running from one half to one inch. There were also instances of flash flooding, including water swiftly flowing across Bell Road in north Scottsdale and multiple swift water rescues performed west of Peoria. Flash Flood Warnings as well as Severe Thunderstorm Warnings were issued in response to the significant weather events. No accidents or injuries were reported.

Hail in MARICOPA, ARIZONA
From 23-OCT-18 16:30:00 to 23-OCT-18 16:30:00 (MST-7)
Location: GLENDALE MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with large hail developed across the northwest portion of the greater Phoenix metropolitan area during the afternoon hours on October 23rd, and some of the stronger storms affected areas around the community of Peoria. According to a trained spotter located 2 miles southeast of Peoria, quarter sized hail fell near the intersection of 75th Avenue and Olive Avenue. The diameter of the larger stones was measured at 1 inch. No damage was reported due to the large hail.

Flash Flood in MARICOPA, ARIZONA
From 23-OCT-18 16:05:00 to 23-OCT-18 19:00:00 (MST-7)
Location: SCOTTSDALE MUNI
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorms with locally heavy rain developed across the northeast portion of the greater Phoenix metropolitan area during the afternoon hours on October 23rd. Some of the stronger storms affected the area around north Scottsdale. Peak rain rates were in excess of one inch per hour, which was sufficient to cause an episode of flash flooding. According to a report from local broadcast media, at 1645MST swift moving water could be seen flowing across Bell Road just east of 94th street, about 2 miles northeast of north Scottsdale and just east of the Loop 101 freeway. The swiftly flowing water was clearly captured in a video. There were no reports of accidents or injury due to the dangerous water running across the road. A Flash Flood Warning was in effect at the time of the flash flooding; it was issued at 1607MST and remained in effect through 1900MST.

Hail in MARICOPA, ARIZONA
From 23-OCT-18 15:30:00 to 23-OCT-18 15:30:00 (MST-7)
Location: SCOTTSDALE MUNI
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with large hail developed during the afternoon hours over the northeast portions of the greater Phoenix metropolitan area on October 23rd, and they affected areas around the community of Scottsdale. According to photos and videos obtained by the general public, at 1530MST large hail fell about 7 miles north of north Scottsdale and near the intersection of North Pima Road and East Happy Valley Road. The photos and video were taken from Twitter. The largest hailstones ranged from quarter to half-dollar in size with maximum diameters of about 1.25 inches. Despite the large hail there were no reports of damage or injuries.

Hail in MARICOPA, ARIZONA
From 23-OCT-18 16:50:00 to 23-OCT-18 16:50:00 (MST-7)
Location: BEARDSLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with large hail developed across the northern portions of the greater Phoenix metropolitan area during the afternoon hours on October 23rd. Some of the stronger storms affected areas north of Sun City West and east of Wittmann. According to reports from the public, at 1650MST large hail fell about 7 miles northeast of Beardsley, near the Blackstone Country Club. The largest stones had a diameter of 1 inch. No damage was reported due to the large hail.

Hail in MARICOPA, ARIZONA
From 23-OCT-18 16:24:00 to 23-OCT-18 16:24:00 (MST-7)
Location: GLENDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with large hail developed across the western portion of the greater Phoenix metropolitan area during the afternoon hours on October 23rd, and some of the stronger storms affected the community of Glendale. According to a report from the public, at 1624MST nickel to quarter sized hailstones fell in Glendale, on Glenn Drive just east of Glendale High School and just west of Grande Avenue. The large hailstones, with a diameter of 1 inch, were viewed on Twitter. No damage was reported due to the large hail.

Flash Flood in MARICOPA, ARIZONA
From 23-OCT-18 17:30:00 to 23-OCT-18 20:30:00 (MST-7)
Location: YOUNGTOWN
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorms with locally heavy rain developed across the western portion of the greater Phoenix metropolitan area during the afternoon hours on October 23rd. Some of the stronger storms affected areas from Luke Air Force Base east into Glendale and Peoria. Peak rain rates with the stronger storms were in excess of one inch per hour and this led to some flash flooding. According to reports from local broadcast media, at roughly 1800MST multiple water rescues were already underway near 103rd Avenue and Mountain View Road. This was just north of Northern Avenue and between New River and the Agua Fria River. There was significant water over the roads and this could be viewed in media chopper footage. A Flash Flood Warning was in effect at the time of the rescues; it was issued at 1729MST and remained in effect through 2030MST. No injuries were reported despite the flash flooding and water rescues.