NOAA Storm Events · September 2018
Hail in September 2018: 180 NOAA reports across 19 states
NOAA logged 180 hail reports in September 2018, in 104 counties across 19 states. Minnesota had the most (42). The largest stone was 2.75 inches (a baseball), near Sun Vly in Navajo County, Arizona, on September 1, 2018. The worst day was September 1, 2018, with 43 reports in 8 states.
- Where
- 104 counties in 19 states; Minnesota had 23% of the reports
- Largest stone
- 2.75 inches, a baseball, in Navajo County, AZ (near Sun Vly), on September 1, 2018
- Worst day
- September 1, 2018: 43 reports in 8 states, 24% of the month
- Days with hail
- 21 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 1, 2018 was the worst day with 43 reports. A day with hail averaged 9.
| September 1 | 43 |
|---|---|
| September 2 | 18 |
| September 3 | 13 |
| September 4 | 2 |
| September 5 | 2 |
| September 6 | 10 |
| September 7 | 0 |
| September 8 | 2 |
| September 9 | 17 |
| September 10 | 2 |
| September 11 | 8 |
| September 12 | 11 |
| September 13 | 1 |
| September 14 | 16 |
| September 15 | 2 |
| September 16 | 0 |
| September 17 | 5 |
| September 18 | 13 |
| September 19 | 2 |
| September 20 | 10 |
| September 21 | 0 |
| September 22 | 0 |
| September 23 | 0 |
| September 24 | 0 |
| September 25 | 0 |
| September 26 | 1 |
| September 27 | 1 |
| September 28 | 0 |
| September 29 | 0 |
| September 30 | 1 |
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 | 42 |
|---|---|
| ND | 32 |
| IA | 23 |
| NE | 19 |
| SD | 17 |
| KS | 14 |
| AZ | 8 |
| FL | 6 |
| OH | 5 |
| NM | 3 |
| # | State | Reports | Share | Largest |
|---|---|---|---|---|
| 1 | Minnesota | 42 | 23.3% | 2 in |
| 2 | North Dakota | 32 | 17.8% | 2 in |
| 3 | Iowa | 23 | 12.8% | 2 in |
| 4 | Nebraska | 19 | 10.6% | 2 in |
| 5 | South Dakota | 17 | 9.4% | 1.75 in |
| 6 | Kansas | 14 | 7.8% | 2.5 in |
| 7 | Arizona | 8 | 4.4% | 2.75 in |
| 8 | Florida | 6 | 3.3% | 1 in |
| 9 | Ohio | 5 | 2.8% | 1.75 in |
| 10 | New Mexico | 3 | 1.7% | 0.75 in |
| # | County | Reports | Largest |
|---|---|---|---|
| 1 | Polk County, IA | 13 | 2 in |
| 2 | Cass County, MN | 7 | 1 in |
| 3 | Stark County, ND | 7 | 1.5 in |
| 4 | Walsh County, ND | 6 | 1.25 in |
| 5 | Clearwater County, MN | 5 | 1.25 in |
| 6 | St. Louis County, MN | 5 | 1.25 in |
| 7 | Broward County, FL | 4 | 1 in |
| 8 | Cheyenne County, NE | 4 | 1.5 in |
| 9 | Roseau County, MN | 4 | 1 in |
| 10 | Saunders County, NE | 4 | 2 in |
County names link to the full hail history where we have published that county. The CSV below lists all 104 counties and all 19 states.
How September 2018 compares
| Compared with | Reports | September 2018 was |
|---|---|---|
| August 2018 | 863 | -683 (-79%) |
| September 2017 | 294 | -114 (-39%) |
| the average September in the other 11 years | 425 | -245 (-58%) |
September 2018 was the 11th busiest September of the 12 in the record and the 92nd 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.