Storm near Peoria
Thursday, July 22, 2021
- Largest hail
- —none reported
- Strongest wind
- —no reading
- Tornadoes
- 0none reported
- Reports
- 2within 10 mi
2 reports
- 55 mph gust (estimated)10.0 mi NE of central Peoria3.4 mi WNW of Phoenix Deer Vly Arp · Maricopa County · Public
Social media photos and videos show several downed palo verde trees of varying sizes along Pinnacle Peak Road near 35th Avenue. Some of the palo verdes fell into the road. Timing estimated from radar. No injuries reported.
- 55 mph gust (estimated)9.7 mi NE of central Peoria2.4 mi W of Phoenix Deer Vly Arp · Maricopa County · Public
Photo of a large shallow-rooted tree that fell between two homes near 29th Avenue and Deer Valley Road and caused minor damage to both. Timing estimated from radar. No injuries reported.
Also hit that day: Phoenix, AZ
What the National Weather Service wrote
Strong to severe thunderstorms developed in an unstable atmosphere in the afternoon of the 22nd. Storms initially developed over the high terrain of northern and eastern Arizona as well as near the Table Top mesa area south of Phoenix. High DCAPE promoted strong thunderstorm downbursts. The downbursts generated outflows that progressed into the greater Phoenix metro area and led to the development of additional scattered thunderstorm. The thunderstorms in the metro area produced damaging winds that led to numerous downed trees, downed power poles, and other property damage. The storms were also nearly stationary, under weak steering flow, and produced very heavy rainfall with rain rates around 1.5-2.0 inches per hour and briefly higher in the strongest storms. This led to considerable flash flooding around Phoenix with several road closure and significant flow in major washes. Even after the strongest storms in Phoenix subsided in the late evening of the 22nd, areas of moderate to heavy rain continued from northeast to southwest through the night and through mid-afternoon on the 23rd. The continued rain through the 23rd was aided by a strengthening diffluent flow regime between the monsoon high to the north and a retrograding upper low moving west through New Mexico. Additional significant flash flooding was observed on the 23rd, mostly in the foothills north of the Phoenix metro, with many road closures, flowing washes and creeks, and some water rescues.