Hail history for Sully County, South Dakota
Every NOAA hail report filed in Sully County since 1967, with preliminary National Weather Service reports to November 3, 2026.
Readout · Sully County
- Last hail
- May 23, 2024
- 1.00 in, quarter size
- Hail days, last 5 years
- 3
- since Nov 3, 2021 · 4 reports
- Largest ever
- 4.25 in
- grapefruit · Jun 21, 2007
146 reports on 93 days since 1967 · #53 of 67 South Dakota counties
Hail map · Sully 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 Sully County
The latest hail report in Sully County is from May 23, 2024, 1.00 in (quarter size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 1.75 in on June 24, 2022.
Over the 20 years 2006–2025, Sully County logged 75 reports on 41 hail days, about 3.8 reports a year. That is 32% less than the median South Dakota county (5.5 a year) and ranks #53 of 67 South Dakota counties for all-time reports. Sully County holds 1% of all 17,223 hail reports in South Dakota.
6% 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 4.25 in (grapefruit) on June 21, 2007 near 4.24 NW Clifton.
Reports were down 40% in 2016–2025 (28) compared with 2006–2015 (47). The busiest year was 2006, with 13 reports on 7 days. Hail here peaks in August (34% of reports); 34% fall between April and June.
Reports a year 2006–2025 average
- Sully County 3.8
- Median South Dakota county 5.5
Hail days 2006–2025
- Sully County 41
- Median South Dakota county 54
Share 2 in or larger of sized reports
- Sully County 6%
- Median South Dakota county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 2 | 2 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | 2 | ||||||||||
| 2019 | 6 | 6 | |||||||||||
| 2018 | 1 | 4 | 1 | 2 | 8 | ||||||||
| 2017 | 2 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 23, 2024 | 1 | 1.00 in | — |
| Jul 30, 2023 | 1 | 1.50 in | — |
| Jun 24, 2022 | 2 | 1.75 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 21, 2007 | 4.25 ingrapefruit | 4.24 NW Clifton | 06:44 local · NCEI |
| Aug 24, 2006 | 4.25 ingrapefruit | 8 W Agar | 14:56 local · NCEI |
| Jul 30, 2016 | 2.75 inbaseball | 6.93 S Clifton | 20:09 local · NCEI |
| Jun 19, 1979 | 2.75 inbaseball | — | 12:48 local · NCEI |
| Aug 24, 2006 | 2.50 intennis ball | 5 W Agar | 15:15 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 50 34%
- 1–2 in 88 60%
- 2 in + 8 5%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 23, 2024 | 1.00 inquarter | 1.47 NNW Agar | 18:30 local · NCEI |
| Jul 30, 2023 | 1.50 inping pong ball | 6.42 NE Laurel | 11:15 local · NCEI |
| Jun 24, 2022 | 1.00 inquarter | Clifton | 18:30 local · NCEI |
| Jun 24, 2022 | 1.75 ingolf ball | 9.82 E Agar | 17:57 local · NCEI |
| Jul 22, 2020 | 1.00 inquarter | 2.55 WNW Onida Muni Arpt | 07:55 local · NCEI |
| Jun 7, 2020 | 1.00 inquarter | 3.6 NE Gallagher | 19:32 local · NCEI |
| Aug 17, 2019 | 1.00 inquarter | 2.07 N Onida Muni Arpt | 18:25 local · NCEI |
| Aug 17, 2019 | 0.88 innickel | 6.88 SSE Okobojo | 14:50 local · NCEI |
| Aug 6, 2019 | 1.75 ingolf ball | 0.69 N Onida | 17:50 local · NCEI |
| Aug 6, 2019 | 1.75 ingolf ball | 5.88 E Laurel | 17:43 local · NCEI |
| Aug 6, 2019 | 1.75 ingolf ball | 5.38 NW Agar | 17:43 local · NCEI |
| Aug 6, 2019 | 1.75 ingolf ball | 5.93 NW Agar | 17:39 local · NCEI |
Cities and towns in Sully County
Questions about hail in Sully County
How often does it hail in Sully County, South Dakota?
146 hail reports have been logged in Sully County since 1967. Over the 20 years 2006–2025 that averages 3.8 reports a year. That ranks #53 of 67 South Dakota counties by number of reports.
When is hail season in Sully County?
Most reports come in August, June, July. August alone accounts for 34% of all reports.
What is the largest hail recorded in Sully County?
4.25 in (grapefruit size) on June 21, 2007 near 4.24 NW Clifton. 5% of reports here were 2 inches or larger.
When did it last hail in Sully County?
The most recent report in this data is from May 23, 2024 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Sully County had in the last five years?
3 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was May 23, 2024.
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.