Hail history for Brown County, South Dakota
Every NOAA hail report filed in Brown County since 1959, with preliminary National Weather Service reports to November 3, 2026.
Readout · Brown County
- Last hail
- Aug 29, 2026
- 1.50 in, ping pong ball size · preliminary
- Hail days, last 5 years
- 19
- since Nov 3, 2021 · 38 reports
- Largest ever
- 4.50 in
- softball · Jun 23, 2002
445 reports on 207 days since 1959 · #6 of 67 South Dakota counties
Hail map · Brown County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Brown County
The latest hail report in Brown County is from August 29, 2026, 1.50 in (ping pong ball size). Since November 3, 2021 there have been 19 separate hail days; the biggest stones in that time were 2.75 in on June 2, 2024.
Over the 20 years 2006–2025, Brown County logged 229 reports on 84 hail days, about 11.4 reports a year. That is about twice the median South Dakota county (5.5 a year) and ranks #6 of 67 South Dakota counties for all-time reports. Brown County holds 3% of all 17,223 hail reports in South Dakota.
7% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median South Dakota county. The largest hail on record here is 4.50 in (softball) on June 23, 2002 near 1 S Barnard.
Reports were down 42% in 2016–2025 (84) compared with 2006–2015 (145). The busiest year was 2010, with 23 reports on 5 days. Hail here peaks in July (27% of reports); 41% fall between April and June.
Reports a year 2006–2025 average
- Brown County 11.4
- Median South Dakota county 5.5
Hail days 2006–2025
- Brown County 84
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Brown County 7%
- Median South Dakota county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 6 | 1 | 8 | |||||||||
| 2025 | 3 | 2 | 5 | ||||||||||
| 2024 | 3 | 6 | 3 | 12 | |||||||||
| 2023 | 1 | 2 | 3 | ||||||||||
| 2022 | 2 | 1 | 3 | 4 | 10 | ||||||||
| 2021 | 1 | 13 | 14 | ||||||||||
| 2020 | 4 | 4 | 2 | 10 | |||||||||
| 2019 | 2 | 1 | 3 | ||||||||||
| 2018 | 1 | 2 | 3 | ||||||||||
| 2017 | 3 | 8 | 5 | 16 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 29, 2026 | 1 | 1.50 in | View |
| Jul 24, 2026 | 6 | 2.25 in | — |
| Jun 29, 2026 | 1 | 1.00 in | — |
| Aug 5, 2025 | 2 | 1.50 in | — |
| Jul 15, 2025 | 2 | 0.75 in | — |
| Jul 14, 2025 | 1 | 0.75 in | — |
| Jul 31, 2024 | 1 | 1.00 in | — |
| Jul 9, 2024 | 1 | 1.25 in | — |
| Jul 6, 2024 | 1 | 1.00 in | — |
| Jun 2, 2024 | 6 | 2.75 in | — |
| May 23, 2024 | 3 | 1.25 in | — |
| Sep 29, 2023 | 2 | 1.50 in | — |
| Aug 10, 2023 | 1 | 1.75 in | — |
| Aug 18, 2022 | 1 | 1.00 in | — |
| Aug 5, 2022 | 3 | 1.50 in | — |
| Jul 23, 2022 | 1 | 1.00 in | — |
| Jul 21, 2022 | 2 | 1.00 in | — |
| Jun 14, 2022 | 1 | 1.75 in | — |
| Apr 22, 2022 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 23, 2002 | 4.50 insoftball | 1 S Barnard | 19:22 local · NCEI |
| Aug 15, 1987 | 4.50 insoftball | — | 14:00 local · NCEI |
| Jul 17, 2010 | 4.25 ingrapefruit | Westport | 14:46 local · NCEI |
| Aug 23, 2020 | 4.00 ingrapefruit | 7.72 W Winship | 16:30 local · NCEI |
| Jun 21, 1961 | 4.00 ingrapefruit | — | 14:30 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 138 31%
- 1–2 in 277 62%
- 2 in + 30 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 29, 2026 | 1.50 inping pong ball | 4 NE Verdon | 08:35 UTC · NWS prelim. |
| Jul 24, 2026 | 2.25 inhen egg | 1.46 SSE Ordway | 20:47 local · NCEI |
| Jul 24, 2026 | 2.00 inhen egg | 2.93 SSE Westport | 20:39 local · NCEI |
| Jul 24, 2026 | 1.00 inquarter | 0.69 N Westport | 20:31 local · NCEI |
| Jul 24, 2026 | 1.00 inquarter | 2.07 N Westport | 20:25 local · NCEI |
| Jul 24, 2026 | 1.75 ingolf ball | 2.53 NW Westport | 20:25 local · NCEI |
| Jul 24, 2026 | 1.00 inquarter | 2.29 NNW Westport | 19:21 local · NCEI |
| Jun 29, 2026 | 1.00 inquarter | Groton | 07:04 local · NCEI |
| Aug 5, 2025 | 1.50 inping pong ball | 7.72 W Winship | 15:39 local · NCEI |
| Aug 5, 2025 | 1.00 inquarter | 8.9 WSW Winship | 15:34 local · NCEI |
| Jul 15, 2025 | 0.75 inpenny | 0.69 S Aberdeen | 13:32 local · NCEI |
| Jul 15, 2025 | 0.75 inpenny | 2.01 SW Aberdeen | 13:26 local · NCEI |
Cities and towns in Brown County
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Hutterville Colony | 7 | 6 | Aug 28, 2021 |
| Hecla | 6 | 6 | Jul 21, 2022 |
| Stratford | 6 | 6 | Sep 29, 2023 |
| Prairiewood Village | 3 | 3 | Jul 24, 2026 |
| Verdon | 2 | 2 | Aug 7, 2021 |
| Bath Corner | 1 | 1 | Jul 18, 1992 |
Questions about hail in Brown County
How often does it hail in Brown County, South Dakota?
445 hail reports have been logged in Brown County since 1959. Over the 20 years 2006–2025 that averages 11.4 reports a year. That ranks #6 of 67 South Dakota counties by number of reports.
When is hail season in Brown County?
Most reports come in July, June, August. July alone accounts for 27% of all reports.
What is the largest hail recorded in Brown County?
4.50 in (softball size) on June 23, 2002 near 1 S Barnard. 7% of reports here were 2 inches or larger.
When did it last hail in Brown County?
The most recent report in this data is from August 29, 2026 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Brown County had in the last five years?
19 separate days with hail reports since November 3, 2021, adding up to 38 reports. The most recent was August 29, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.