Hail in Arizona
Every hail event the National Weather Service has filed in Arizona, year by year, with the most significant episodes. Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
The most significant on the map
The most significant hail episodes in Arizona.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 1,321
- Deaths
- 3
- Injuries
- 23
- Damage
- $2.8 billion
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Flash Flooding and Flooding in Arizona, August 3 to 31, 1997Flash flooding of state highway 99 south of Leupp. Two drainage ditches and a small stock pond filled rapidly with water which then flowed across highway 99, 2 miles south of Leupp. Arizona Dept.
- Flash Flooding and Hail in Arizona, July 15, 2017Thunderstorms caused flash flooding, hail, and wind damage across southern Yavapai and northern Gila Counties.
- Flash Flooding and Flood in Arizona, August 1 to 17, 1997Heavy rain from thunderstorms sent a one foot wall of water down a dry wash at Harrison Road and Pantano in far eastern Tucson preventing traffic from crossing.
- Tornado and Flash Flooding in Arizona, September 25 to 27, 2025A slow-moving low pressure system brought several rounds of showers and thunderstorms over multiple days through much of the region. Activity on the 25th was mostly concentrated across higher terrain areas of eastern AZ, fueled by MLCAPE values approaching 2000 J/kg.
- Tornado and Flash Flooding in Arizona, July 5 to 29, 1999Three U.S. Forest Service firefighters were stunned or paralyzed for a few minutes as lightning hit the ground near them. They also suffered some burns on the feet and shoulders.
- Flash Flooding and Hail in Arizona, August 18, 2021An upper level trough and lead-on shortwave trough moved through Arizona during the day on the 18th. Moderate to high instability and high moisture content supported scattered strong thunderstorms.
- Tornadoes and Hail in Arizona, October 6, 2010A strong low pressure center over California pushed abundant moisture over Arizona producing widespread thunderstorms with numerous severe storms. Strong vertical wind shear...with helicity in the 400-450 range...also provided an environment for supercell development.
- Tornadoes and Hail in Arizona, June 21, 1972
- Tornado and Flash Flooding in Arizona, September 2 to 13, 1997Flash Flooding of Bright Angel Creek caused minor flooding in the Bright Angel Campground.
- Flash Flooding and Flooding in Arizona, October 12 to 13, 2025A nearly stationary upper-level trough combined with tropical moisture remnants from Tropical Storms Priscilla and Raymond, which developed off the eastern Pacific, led to scattered to widespread thunderstorm activity across much of south-central AZ.
- Flash Flood and Hail in Arizona, May 18 to 20, 1997A tin roof was blown off a shed.
- Hail and Damaging Winds in Arizona, July 24, 2024Scattered to numerous thunderstorms developed across eastern and southeastern AZ during the afternoon hours.
- Flash Flood and Hail in Arizona, October 5, 2010An unusual series of severe storms with damaging winds and hail struck many portions of the Phoenix area during the afternoon and evening hours.
- Flash Flooding and Flooding in Arizona, July 22 to 24, 2021A number of rounds of thunderstorms were triggered by a westward moving upper level weather system across southeast Arizona from the afternoon of July 22 into the early morning of July 23.
- Hail and Damaging Winds in Arizona, June 30, 2015High pressure resided over southern Utah/northern Arizona with weak low pressure over west Texas. This created strong easterly flow over southeast Arizona, which increased to 25-30 kts.
- Dust Storm and Hail in Arizona, July 7 to 10, 1997Thunderstorm winds downed several power lines, blew a stoplight down, snapped a 30-foot Palm tree in half, and split a 15-foot high tree in two.
- Flash Flooding and Hail in Arizona, September 15, 2011A low pressure system in northern Arizona interacted with abundant moisture to produce showers and thunderstorms across southern Arizona. Some of the storms produced large hail, torrential rains, and strong winds.
- Hail and Damaging Winds in Arizona, September 12, 1993A severe thunderstorm moved into the far northern part of the city of Casa Grande, and overturned a mobile home which pinned a small child underneath. The little girl later died of her injuries.
- Flooding and Hail in Arizona, September 1 to 20, 1999About 2 inches of rain fell in about 2 hours.
- Flood and Dust Storm in Arizona, August 22 to 23, 2024Thunderstorm activity developed across much of eastern AZ, along the higher terrain features, during the early afternoon hours. Outflow boundaries emanating from the activity over the higher terrain areas sparked a complex of robust thunderstorms over Pinal County.
- Flash Flooding and Hail in Arizona, June 17, 2026Strong to severe thunderstorms moved northward through Southeastern Arizona the afternoon and evening of June 17th, 2026.
- Flash Flooding and Flood in Arizona, October 3 to 4, 2018A strong Pacific low pressure system plus leftover moisture from the remnants of Hurricane Rosa produced thunderstorms over the Mojave Desert. Significant flash flooding and isolated severe weather occurred.
- Hail and Damaging Winds in Arizona, September 13, 1994A micro burst struck a school building at the Littleton Elementary School in the community of Cashion, two miles SW of Tolleson. The roof was torn off about eight classrooms with one teacher and eight children being injured.
- Flash Flood and Hail in Arizona, August 14, 2003Severe thunderstorms moved west towards San Maneul and Oracle. Strong winds knocked down a teepee that was supported by 10 six inch diameter poles.
- Flooding and Hail in Arizona, August 10 to 31, 1999Microburst winds and heavy rain developed over much of north Phoenix around 430 pm. As many as 20 power poles were downed by the high winds, and torrential rain near Rose Garden Lane between 19th and 25th avenues.
More
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.