Thunderstorms developed across the deserts of south-central Arizona during the late afternoon and evening hours on October 21st. Typically, thunderstorms across the lower Arizona deserts bring strong gusty winds along with heavy rain, but in this instance the stronger storms produced episodes of large hail. The cooler atmospheric conditions, with lower freezing levels, allowed the large hail to reach the ground. Numerous reports of large hail were received from trained spotters, the public and local broadcast media. The largest hailstones ranged in diameter from 1 inch to nearly 2 inches. In some instances the large hailstones produced damage; according to the public, golf ball sized hail damaged the windows of a car and a home about 2 miles from the town of Coolidge. No injuries were reported due to the large hail.

Hail in PINAL, ARIZONA
From 21-OCT-18 16:52:00 to 21-OCT-18 16:52:00 (MST-7)
Location: MAGMA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with large hail developed to the southeast of Phoenix during the late afternoon hours on October 21st. Some of the stronger storms affected areas near the town of Florence. According to a public report, at 1652MST large hail fell about 9 miles northwest of Florence and southeast of San Tan Valley. The large stones fell near the intersection of Judd Road and Cooper Road. The hailstones ranged in size from nickel to quarter, with the largest stones having a diameter of about 1 inch. No damage was reported. The reports were received via Twitter.

Hail in PINAL, ARIZONA
From 21-OCT-18 16:40:00 to 21-OCT-18 16:40:00 (MST-7)
Location: FLORENCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with large hail developed to the southeast of Phoenix during the late afternoon hours on October 21st. Some of the stronger storms affected the community of Florence. According to a trained weather spotter 1 mile north of Florence, quarter sized hailstones fell at 1640MST, near the intersection of Highway 79 and East Diversion Dam Road. No damage was reported with the large hail.

Hail in PINAL, ARIZONA
From 21-OCT-18 17:20:00 to 21-OCT-18 17:20:00 (MST-7)
Location: GOLDFIELD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms developed to the east of Phoenix during the late afternoon hours on October 21st; some of the stronger storms affected the community of Gold Canyon which is only a few miles east of Apache Junction. Large hail was reported with some of the storms. According to a report from the public, at 1720MST ping pong ball sized hail was reported in Gold Canyon, about 8 miles east of Apache Junction and due east of the Gold Canyon Golf Resort. The larger stones had a diameter of 1.5 inches. The hail reports were received from Twitter. No injuries were reported due to the large hail.

Hail in MARICOPA, ARIZONA
From 21-OCT-18 04:20:00 to 21-OCT-18 04:30:00 (MST-7)
Location: BEARDSLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms developed to the north of Phoenix during the early morning hours on October 21st, and some of them affected areas between Surprise and New River. The stronger storms produced large hail with diameters up to one inch. At 0420MST, the public reported large hail with a diameter of 0.75 inches. The hail fell about 7 miles northeast of Surprise and near the intersection of Jomax Road and the Lake Pleasant Parkway. About 10 minutes later, the public reported large hail about 10 miles southwest of New River, just southeast of the intersection of Highway 74 and the Lake Pleasant Parkway. In this report the largest stones were 1 inch in diameter. No injuries or damage were reported due to the large hail.

Hail in MARICOPA, ARIZONA
From 21-OCT-18 19:44:00 to 21-OCT-18 19:44:00 (MST-7)
Location: HIGHTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with large hail developed to the southeast of Phoenix during the early evening hours on October 21st. According to a report from a trained weather spotter, at 1944MST large hail was reported about 3 miles to the northwest of Chandler, near the intersection of Warner Road and McClintock Drive. The diameter of the largest hailstones was 1 inch. No damage was reported due to the large hail.

Hail in MARICOPA, ARIZONA
From 21-OCT-18 19:22:00 to 21-OCT-18 19:22:00 (MST-7)
Location: OCOTILLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with large hail developed to the southeast of Phoenix during the early evening hours on October 21st. According to a trained weather spotter, at 1922MST large hail fell about 3 miles west of Sun Lakes, near the intersection of Riggs Road and Interstate 10. The larger hailstones were described as quarter sized, with diameters of about 1 inch. No damage was reported due to the large hail.

Thunderstorm Wind in MARICOPA, ARIZONA
From 21-OCT-18 19:00:00 to 21-OCT-18 19:00:00 (MST-7)
Location: OCOTILLO
Magnitude: 49.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms developed to the south of Phoenix during the evening hours on October 21st and some of the stronger storms affected areas around the town of Maricopa. According to a local emergency manager, thunderstorms produced large hail and strong winds at the Ak Chin Airport, about 9 miles southeast of Maricopa. At 1900MST, the  automated ASOS station at the airport measured gusts to 56 mph. The manager also reported multiple aircraft severely damaged, with the damage likely caused by large hail. No injuries were reported due to hail or strong wind. There was no size estimate given for the large hail referenced.

Hail in PINAL, ARIZONA
From 21-OCT-18 17:16:00 to 21-OCT-18 17:20:00 (MST-7)
Location: PALM SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Isolated thunderstorms developed to the east of Phoenix during the late afternoon hours on October 21st. The stronger storms, which affected the community of Gold Canyon, produced episodes of large hail. According to multiple reports both from the public and trained weather spotters, nickel sized hailstones fell in Gold Canyon, about 6 miles to the southeast of Apache Junction. The public reports of the large hail were reported via Twitter. The hail reports were all received within just a few minutes. No injuries or damages were reported.

Hail in PINAL, ARIZONA
From 21-OCT-18 16:28:00 to 21-OCT-18 16:28:00 (MST-7)
Location: COOLIDGE
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorms with very large hail developed to the southeast of the greater Phoenix area during the afternoon hours on October 21st. Some of the stronger storms produced hail with diameters well in excess of one inch and they affected the areas around the town of Coolidge. According to a report from the public, at 1628MST golf ball sized hailstones fell about 2 miles northeast of Coolidge and they resulted in property damage to a car and house window. At the nearby Lonestar Equestrian Center, the large hail caused minor injuries to some of the horses, and gashed the head of one of the cowboys during a roping contest. The center is located near the intersection of Attaway Road and Coolidge Avenue. The diameter of the largest hailstones was 1.75 inches. At the same time, local broadcast media reported additional large hail about 4 miles northeast of Coolidge. The media relayed a public report indicating that half-dollar sized hail had fallen in Valley Farms; the diameter of the largest hailstones was 1.25 inches.

Hail in PINAL, ARIZONA
From 21-OCT-18 16:52:00 to 21-OCT-18 16:52:00 (MST-7)
Location: FLORENCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorms with large hail developed to the southeast of Phoenix during the late afternoon and evening hours on October 21st. According to a trained weather spotter located 5 miles northwest of Florence, large hail was reported at 1652MST near Anthem Community Park and just northeast of the intersection of Attaway Road and the Hunt Highway. The diameter of the largest stones was about 1 inch. No damage was reported as a result of the large hail.