Hail history for Walworth County, South Dakota
Every NOAA hail report filed in Walworth County since 1963, with preliminary National Weather Service reports to November 3, 2026.
Readout · Walworth County
- Last hail
- Aug 24, 2026
- 1.00 in, quarter size · preliminary
- Hail days, last 5 years
- 7
- since Nov 3, 2021 · 9 reports
- Largest ever
- 3.00 in
- teacup · Aug 23, 2018
181 reports on 101 days since 1963 · #43 of 67 South Dakota counties
Hail map · Walworth County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Walworth County is from August 24, 2026. A local roofer can check and document it at no cost.
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What the record says about Walworth County
The latest hail report in Walworth County is from August 24, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 7 separate hail days; the biggest stones in that time were 1.75 in on July 30, 2023.
Over the 20 years 2006–2025, Walworth County logged 113 reports on 50 hail days, about 5.7 reports a year. That is about the same as the median South Dakota county (5.5 a year) and ranks #43 of 67 South Dakota counties for all-time reports. Walworth County holds 1% of all 17,223 hail reports in South Dakota.
8% 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 3.00 in (teacup) on August 23, 2018 near 7.63 ESE Lowry.
Reports were down 31% in 2016–2025 (46) compared with 2006–2015 (67). The busiest year was 2012, with 30 reports on 3 days. Hail here peaks in August (43% of reports); 30% fall between April and June.
Reports a year 2006–2025 average
- Walworth County 5.7
- Median South Dakota county 5.5
Hail days 2006–2025
- Walworth County 50
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Walworth County 8%
- Median South Dakota county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 2 | 1 | 4 | |||||||||
| 2025 | 2 | 2 | |||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 2 | 2 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 1 | 3 | 4 | ||||||||||
| 2020 | 2 | 4 | 6 | ||||||||||
| 2019 | 1 | 3 | 7 | 11 | |||||||||
| 2018 | 2 | 2 | 1 | 5 | |||||||||
| 2017 | 2 | 2 | 4 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 24, 2026 | 1 | 1.00 in | View |
| Jul 7, 2026 | 2 | 1.00 in | — |
| Jun 2, 2026 | 1 | 1.00 in | — |
| Aug 13, 2025 | 1 | 1.00 in | — |
| Aug 5, 2025 | 1 | 1.00 in | — |
| Jul 30, 2023 | 2 | 1.75 in | — |
| Jun 24, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 23, 2018 | 3.00 inteacup | 7.63 ESE Lowry | 17:03 local · NCEI |
| Aug 6, 2019 | 2.75 inbaseball | 2.29 SSE Java | 18:30 local · NCEI |
| Aug 6, 2019 | 2.75 inbaseball | 6.19 NW Java Jct | 18:16 local · NCEI |
| Aug 10, 2007 | 2.75 inbaseball | 0.84 NW Mobridge | 19:23 local · NCEI |
| Jul 18, 2001 | 2.75 inbaseball | 12 SE Selby | 19:05 local · NCEI |
Size of every report
- Under 1 in 44 24%
- 1–2 in 123 68%
- 2 in + 14 8%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 24, 2026 | 1.00 inquarter | 2 SSE Glenham | 00:45 UTC · NWS prelim. |
| Jul 7, 2026 | 1.00 inquarter | Selby | 19:52 local · NCEI |
| Jul 7, 2026 | 0.75 inpenny | 5.19 NE Java | 08:00 local · NCEI |
| Jun 2, 2026 | 1.00 inquarter | 10.12 ESE Lowry | 16:17 local · NCEI |
| Aug 13, 2025 | 1.00 inquarter | 4.39 NNE Lowry | 08:38 local · NCEI |
| Aug 5, 2025 | 1.00 inquarter | 6.76 SE Lowry | 19:50 local · NCEI |
| Jul 30, 2023 | 1.75 ingolf ball | Akaska | 10:00 local · NCEI |
| Jul 30, 2023 | 1.00 inquarter | 0.84 SW (Y26)mobridge Arpt | 09:28 local · NCEI |
| Jun 24, 2022 | 1.00 inquarter | 6.91 S Glenham | 18:10 local · NCEI |
| Aug 28, 2021 | 2.50 intennis ball | 4.17 N Lowry | 01:32 local · NCEI |
| Aug 28, 2021 | 1.00 inquarter | 3.59 NNE Selby | 00:56 local · NCEI |
| Aug 28, 2021 | 1.25 inhalf dollar | Glenham | 00:35 local · NCEI |
Cities and towns in Walworth 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 |
|---|---|---|---|
| Akaska | 7 | 7 | Jul 30, 2023 |
| Lowry | 6 | 6 | Jul 20, 2019 |
Questions about hail in Walworth County
How often does it hail in Walworth County, South Dakota?
181 hail reports have been logged in Walworth County since 1963. Over the 20 years 2006–2025 that averages 5.7 reports a year. That ranks #43 of 67 South Dakota counties by number of reports.
When is hail season in Walworth County?
Most reports come in August, July, June. August alone accounts for 43% of all reports.
What is the largest hail recorded in Walworth County?
3.00 in (teacup size) on August 23, 2018 near 7.63 ESE Lowry. 8% of reports here were 2 inches or larger.
When did it last hail in Walworth County?
The most recent report in this data is from August 24, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Walworth County had in the last five years?
7 separate days with hail reports since November 3, 2021, adding up to 9 reports. The most recent was August 24, 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.