Hail history for Allen, South Dakota
NOAA hail reports in and within about 5 km (3 miles) of Allen since 1990, with preliminary reports to November 3, 2026.
Readout · Allen
- Last hail
- Aug 18, 2011
- 1.75 in, golf ball size
- Hail days, last 5 years
- 0
- since Nov 3, 2021 · 0 reports
- Largest ever
- 2.75 in
- baseball · Aug 18, 2011
10 reports on 9 days since 1990 · #283 of 305 South Dakota places
Hail map · Allen
- 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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Send a request to Moxisync Labs for review. The latest hail report in Allen is from August 18, 2011. We’re building local roofer coverage. Submitting a request does not guarantee a quote or book an inspection.
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What the record says about Allen
The latest hail report in and around Allen is from August 18, 2011, 1.75 in (golf ball size). There has been no hail report here in the five years since November 3, 2021.
Over the 20 years 2006–2025, Allen logged 8 reports on 7 hail days, about 0.4 reports a year. That is 11% less than the median South Dakota town on this site (0.5 a year) and ranks #283 of 305 South Dakota cities and towns on this site for all-time reports. Allen accounts for 4% of the 226 reports filed in Bennett County.
10% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median South Dakota town on this site. The largest hail on record here is 2.75 in (baseball) on August 18, 2011 near Allen.
Reports were down 100% in 2016–2025 (0) compared with 2006–2015 (8). The busiest year was 2011, with 3 reports on 2 days. Hail here peaks in August (50% of reports); 50% fall between April and June.
Reports a year 2006–2025 average
- Allen 0.4
- Bennett County 6.8
- Median South Dakota town on this site 0.5
Hail days 2006–2025
- Allen 7
- Bennett County 83
- Median South Dakota town on this site 7
Share 2 in or larger of sized reports
- Allen 10%
- Bennett County 11%
- Median South Dakota town on this site 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Aug 18, 2011 | 2.75 inbaseball | Allen | Bennett | $200K | 16:10 local · NCEI |
| Aug 18, 2011 | 1.75 ingolf ball | 4 SSE Allen | Bennett | — | 16:20 local · NCEI |
| Jun 26, 2010 | 1.75 ingolf ball | 1 W Allen | Bennett | — | 15:35 local · NCEI |
| Aug 11, 2006 | 1.75 ingolf ball | 1 W Allen | Bennett | — | 13:55 local · NCEI |
| Jun 1, 1990 | 1.75 ingolf ball | — | Bennett | — | 14:10 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 4 40%
- 1–2 in 5 50%
- 2 in + 1 10%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Aug 18, 2011 | 1.75 ingolf ball | 4 SSE Allen | Bennett | — | 16:20 local · NCEI |
| Aug 18, 2011 | 2.75 inbaseball | Allen | Bennett | $200K | 16:10 local · NCEI |
| Jun 12, 2011 | 0.88 innickel | 1 W Allen | Bennett | — | 19:25 local · NCEI |
| Jun 26, 2010 | 1.75 ingolf ball | 1 W Allen | Bennett | — | 15:35 local · NCEI |
| Aug 12, 2008 | 0.88 innickel | 3 W Allen | Bennett | — | 16:50 local · NCEI |
| May 29, 2008 | 0.75 inpenny | 1 W Allen | Bennett | — | 16:40 local · NCEI |
| May 5, 2007 | 1.00 inquarter | Allen | Bennett | — | 10:35 local · NCEI |
| Aug 11, 2006 | 1.75 ingolf ball | 1 W Allen | Bennett | — | 13:55 local · NCEI |
| Aug 26, 2002 | 0.75 inpenny | 3 SW Allen | Bennett | — | 05:43 local · NCEI |
| Jun 1, 1990 | 1.75 ingolf ball | — | Bennett | — | 14:10 local · NCEI |
Hail history near Allen
- Martin 20 km · 35
- Batesland 22 km · 14
- Kyle 26 km · 23
- Porcupine 33 km · 12
- Wounded Knee 39 km · 14
- Wanblee 39 km · 11
- Manderson-White Horse Creek 46 km · 18
- Interior 51 km · 34
Questions about hail in Allen
How often does it hail in Allen, South Dakota?
10 hail reports have been logged in and within about 5 km (3 miles) of Allen since 1990. Over the 20 years 2006–2025 that averages 0.4 reports a year. That ranks #283 of 305 South Dakota places by number of reports.
When is hail season in Allen?
Most reports come in August, June, May. August alone accounts for 50% of all reports.
What is the largest hail recorded in Allen?
2.75 in (baseball size) on August 18, 2011 near Allen. 10% of reports here were 2 inches or larger.
When did it last hail in Allen?
The most recent report in this data is from August 18, 2011 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Allen had in the last five years?
None: there has been no hail report in and within about 5 km (3 miles) of Allen since November 3, 2021. The last one was on August 18, 2011.
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.