NOAA Storm Events · September 2017
Hail in September 2017: 294 NOAA reports across 36 states
NOAA logged 294 hail reports in September 2017, in 182 counties across 36 states. Minnesota had the most (46). The largest stone was 2.75 inches (a baseball), near Angier in Harnett County, North Carolina, on September 1, 2017. The worst day was September 4, 2017, with 41 reports in 7 states.
- Where
- 182 counties in 36 states; Minnesota had 16% of the reports
- Largest stone
- 2.75 inches, a baseball, in Harnett County, NC (near Angier), on September 1, 2017
- Worst day
- September 4, 2017: 41 reports in 7 states, 14% of the month
- Days with hail
- 24 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 4, 2017 was the worst day with 41 reports. A day with hail averaged 12.
| September 1 | 18 |
|---|---|
| September 2 | 4 |
| September 3 | 1 |
| September 4 | 41 |
| September 5 | 22 |
| September 6 | 2 |
| September 7 | 0 |
| September 8 | 7 |
| September 9 | 0 |
| September 10 | 0 |
| September 11 | 4 |
| September 12 | 0 |
| September 13 | 1 |
| September 14 | 15 |
| September 15 | 15 |
| September 16 | 7 |
| September 17 | 6 |
| September 18 | 12 |
| September 19 | 40 |
| September 20 | 28 |
| September 21 | 3 |
| September 22 | 35 |
| September 23 | 8 |
| September 24 | 7 |
| September 25 | 2 |
| September 26 | 0 |
| September 27 | 0 |
| September 28 | 2 |
| September 29 | 2 |
| September 30 | 12 |
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.
| MN | 46 |
|---|---|
| SD | 33 |
| WI | 26 |
| NE | 20 |
| IL | 19 |
| MI | 15 |
| NM | 15 |
| TX | 15 |
| NC | 13 |
| KS | 12 |
| # | State | Reports | Share | Largest |
|---|---|---|---|---|
| 1 | Minnesota | 46 | 15.6% | 2.5 in |
| 2 | South Dakota | 33 | 11.2% | 1.75 in |
| 3 | Wisconsin | 26 | 8.8% | 2 in |
| 4 | Nebraska | 20 | 6.8% | 1.75 in |
| 5 | Illinois | 19 | 6.5% | 2 in |
| 6 | Michigan | 15 | 5.1% | 2 in |
| 7 | New Mexico | 15 | 5.1% | 1.75 in |
| 8 | Texas | 15 | 5.1% | 2.75 in |
| 9 | North Carolina | 13 | 4.4% | 2.75 in |
| 10 | Kansas | 12 | 4.1% | 1.75 in |
| # | County | Reports | Largest |
|---|---|---|---|
| 1 | St. Louis County, MN | 11 | 2 in |
| 2 | Sawyer County, WI | 7 | 1.25 in |
| 3 | Brown County, SD | 5 | 1.5 in |
| 4 | Buffalo County, NE | 5 | 1.5 in |
| 5 | Portage County, WI | 5 | 2 in |
| 6 | Houghton County, MI | 4 | 1 in |
| 7 | Hubbard County, MN | 4 | 1.75 in |
| 8 | Lake County, SD | 4 | 1.75 in |
| 9 | McPherson County, SD | 4 | 1.5 in |
| 10 | Sandoval County, NM | 4 | 1.1 in |
County names link to the full hail history where we have published that county. The CSV below lists all 182 counties and all 36 states.
How September 2017 compares
| Compared with | Reports | September 2017 was |
|---|---|---|
| August 2017 | 769 | -475 (-62%) |
| September 2016 | 490 | -196 (-40%) |
| the average September in the other 11 years | 414 | -120 (-29%) |
September 2017 was the 8th busiest September of the 12 in the record and the 86th 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.