Hail history for Harrison County, Iowa
Every NOAA hail report filed in Harrison County since 1964, with preliminary National Weather Service reports to November 3, 2026.
Readout · Harrison County
- Last hail
- May 31, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 10
- since Nov 3, 2021 · 26 reports
- Largest ever
- 3.00 in
- teacup · Jun 12, 2024
218 reports on 126 days since 1964 · #18 of 100 Iowa counties
Hail map · Harrison 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 Harrison County
The latest hail report in Harrison County is from May 31, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 10 separate hail days; the biggest stones in that time were 3.00 in on June 12, 2024.
Over the 20 years 2006–2025, Harrison County logged 86 reports on 53 hail days, about 4.3 reports a year. That is 16% more than the median Iowa county (3.7 a year) and ranks #18 of 100 Iowa counties for all-time reports. Harrison County holds 1% of all 16,032 hail reports in Iowa.
6% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median Iowa county. The largest hail on record here is 3.00 in (teacup) on June 12, 2024 near 1 NW Little Sioux.
Reports were down 52% in 2016–2025 (28) compared with 2006–2015 (58). The busiest year was 2002, with 19 reports on 8 days. Hail here peaks in June (28% of reports); 74% fall between April and June.
Reports a year 2006–2025 average
- Harrison County 4.3
- Median Iowa county 3.7
Hail days 2006–2025
- Harrison County 53
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Harrison County 6%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 14 | 1 | 15 | ||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 4 | 4 | |||||||||||
| 2023 | 1 | 1 | 2 | ||||||||||
| 2022 | 1 | 3 | 4 | ||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 2 | 2 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 2 | 6 | 5 | 13 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 31, 2026 | 1 | 1.00 in | — |
| Apr 23, 2026 | 9 | 1.50 in | — |
| Apr 15, 2026 | 5 | 1.75 in | — |
| Sep 22, 2025 | 1 | 1.00 in | — |
| Jun 25, 2024 | 1 | 1.50 in | — |
| Jun 12, 2024 | 3 | 3.00 in | — |
| Sep 23, 2023 | 1 | 1.00 in | — |
| Jul 17, 2023 | 1 | 1.00 in | — |
| May 18, 2022 | 3 | 1.25 in | — |
| Apr 12, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 12, 2024 | 3.00 inteacup | 1 NW Little Sioux | 19:29 local · NCEI |
| Jun 29, 2014 | 2.75 inbaseball | 3.45 SW Magnolia | 16:15 local · NCEI |
| May 22, 2004 | 2.75 inbaseball | Logan | 18:50 local · NCEI |
| May 17, 1996 | 2.75 inbaseball | Beebeetown | 19:15 local · NCEI |
| Aug 6, 2011 | 2.50 intennis ball | Dunlap | 19:10 local · NCEI |
Size of every report
- Under 1 in 73 33%
- 1–2 in 133 61%
- 2 in + 12 6%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 31, 2026 | 1.00 inquarter | 0.86 NE Woodbine | 22:56 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | 0.86 NE Yorkshire | 15:16 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | 1.55 W Beebeetown | 14:51 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | 0.86 SE Logan | 14:45 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | Dunlap | 14:36 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | Euclid | 14:27 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | 0.86 SE Logan | 14:01 local · NCEI |
| Apr 23, 2026 | 1.25 inhalf dollar | 1.24 NW California Jct | 14:00 local · NCEI |
| Apr 23, 2026 | 1.50 inping pong ball | 3.45 N Missouri Vly | 13:51 local · NCEI |
| Apr 23, 2026 | 1.00 inquarter | 0.52 E Modale | 13:41 local · NCEI |
| Apr 15, 2026 | 1.75 ingolf ball | Dunlap | 10:35 local · NCEI |
| Apr 15, 2026 | 1.75 ingolf ball | Dunlap | 10:33 local · NCEI |
Cities and towns in Harrison County
| Place | Reports | Largest |
|---|---|---|
| Missouri Valley | 29 | 2.00 in |
| Logan | 26 | 2.75 in |
| Woodbine | 25 | 1.75 in |
| Little Sioux | 19 | 2.00 in |
| Mondamin | 19 | 2.50 in |
| Modale | 17 | 2.00 in |
| River Sioux | 12 | 3.00 in |
| Dunlap | 11 | 2.50 in |
| Magnolia | 11 | 2.75 in |
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 |
|---|---|---|---|
| Pisgah | 6 | 5 | Apr 15, 2026 |
| California Junction | 4 | 4 | Aug 20, 2005 |
| Persia | 4 | 4 | Apr 23, 2026 |
Questions about hail in Harrison County
How often does it hail in Harrison County, Iowa?
218 hail reports have been logged in Harrison County since 1964. Over the 20 years 2006–2025 that averages 4.3 reports a year. That ranks #18 of 100 Iowa counties by number of reports.
When is hail season in Harrison County?
Most reports come in June, May, April. June alone accounts for 28% of all reports.
What is the largest hail recorded in Harrison County?
3.00 in (teacup size) on June 12, 2024 near 1 NW Little Sioux. 6% of reports here were 2 inches or larger.
When did it last hail in Harrison County?
The most recent report in this data is from May 31, 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 Harrison County had in the last five years?
10 separate days with hail reports since November 3, 2021, adding up to 26 reports. The most recent was May 31, 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.