NOAA Storm Events · September 2021
Hail in September 2021: 326 NOAA reports across 30 states
NOAA logged 326 hail reports in September 2021, in 160 counties across 30 states. Wisconsin had the most (90). The largest stone was 4.5 inches (a softball), near Applecreek in Outagamie County, Wisconsin, on September 7, 2021. The worst day was September 7, 2021, with 123 reports in 6 states.
- Where
- 160 counties in 30 states; Wisconsin had 28% of the reports
- Largest stone
- 4.5 inches, a softball, in Outagamie County, WI (near Applecreek), on September 7, 2021
- Worst day
- September 7, 2021: 123 reports in 6 states, 38% of the month
- Days with hail
- 22 of 30 days had at least one report
- under 1 in
- 1 to 1.74 in
- 1.75 to 2.74 in
- 2.75 in and up
Day by day
September 7, 2021 was the worst day with 123 reports. A day with hail averaged 15.
| September 1 | 3 |
|---|---|
| September 2 | 12 |
| September 3 | 12 |
| September 4 | 0 |
| September 5 | 6 |
| September 6 | 5 |
| September 7 | 123 |
| September 8 | 5 |
| September 9 | 0 |
| September 10 | 1 |
| September 11 | 0 |
| September 12 | 16 |
| September 13 | 16 |
| September 14 | 18 |
| September 15 | 16 |
| September 16 | 32 |
| September 17 | 5 |
| September 18 | 1 |
| September 19 | 1 |
| September 20 | 16 |
| September 21 | 1 |
| September 22 | 0 |
| September 23 | 0 |
| September 24 | 4 |
| September 25 | 0 |
| September 26 | 0 |
| September 27 | 0 |
| September 28 | 18 |
| September 29 | 6 |
| September 30 | 9 |
Where it hit hardest
Ranked by NOAA hail reports. A report is one spotter or sensor entry for one county and storm, so counts follow where people live as well as where hail fell.
| WI | 90 |
|---|---|
| MN | 33 |
| KS | 31 |
| MI | 30 |
| IL | 25 |
| TX | 12 |
| VA | 12 |
| NE | 9 |
| CO | 8 |
| AZ | 7 |
| # | State | Reports | Share | Largest |
|---|---|---|---|---|
| 1 | Wisconsin | 90 | 27.6% | 4.5 in |
| 2 | Minnesota | 33 | 10.1% | 3 in |
| 3 | Kansas | 31 | 9.5% | 2 in |
| 4 | Michigan | 30 | 9.2% | 2.5 in |
| 5 | Illinois | 25 | 7.7% | 2 in |
| 6 | Texas | 12 | 3.7% | 2.25 in |
| 7 | Virginia | 12 | 3.7% | 1.75 in |
| 8 | Nebraska | 9 | 2.8% | 2 in |
| 9 | Colorado | 8 | 2.5% | 1.25 in |
| 10 | Arizona | 7 | 2.1% | 2 in |
| # | County | Reports | Largest |
|---|---|---|---|
| 1 | Outagamie County, WI | 20 | 4.5 in |
| 2 | Dane County, WI | 11 | 1.5 in |
| 3 | Lee County, IL | 8 | 2 in |
| 4 | St. Louis County, MN | 8 | 3 in |
| 5 | Walworth County, WI | 8 | 1.5 in |
| 6 | Edwards County, KS | 7 | 1.75 in |
| 7 | Fond du Lac County, WI | 7 | 3 in |
| 8 | Waukesha County, WI | 7 | 1 in |
| 9 | Brown County, WI | 6 | 2.5 in |
| 10 | Johnson County, KS | 6 | 1.75 in |
County names link to the full hail history where we have published that county. The CSV below lists all 160 counties and all 30 states.
How September 2021 compares
| Compared with | Reports | September 2021 was |
|---|---|---|
| August 2021 | 735 | -409 (-56%) |
| September 2020 | 138 | +188 (+136%) |
| the average September in the other 11 years | 411 | -85 (-21%) |
September 2021 was the 7th busiest September of the 12 in the record and the 84th busiest of all 150 months.
| 2014 | 464 |
|---|---|
| 2015 | 480 |
| 2016 | 490 |
| 2017 | 294 |
| 2018 | 180 |
| 2019 | 696 |
| 2020 | 138 |
| 2021 | 326 |
| 2022 | 282 |
| 2023 | 700 |
| 2024 | 256 |
| 2025 | 544 |
Every September in the record, 2014 to 2025. Months after June 2026 are not in NOAA's file yet.
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Download the data
Source: NOAA NCEI Storm Events Database, hail rows at county level, data through June 2026. Reports are preliminary and unverified: they show that hail was reported in a county, not that a given roof was damaged. Method: how we count. More: State of Hail by year · county hail history · press.
Source: NOAA Storm Events Database, public domain. Counts and tables on this page are free to reuse with credit to PickARoofer under CC BY 4.0.