Hail history for River Sioux, Iowa
NOAA hail reports in and within about 5 km (3 miles) of River Sioux since 2000, with preliminary reports to November 3, 2026.
Readout · River Sioux
- Last hail
- Jun 12, 2024
- 3.00 in, teacup size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 2 reports
- Largest ever
- 3.00 in
- teacup · Jun 12, 2024
12 reports on 11 days since 2000 · #378 of 483 Iowa places
Hail map · River Sioux
- 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 River Sioux is from June 12, 2024. A local roofer can check and document it at no cost.
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What the record says about River Sioux
The latest hail report in and around River Sioux is from June 12, 2024, 3.00 in (teacup size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 3.00 in on June 12, 2024.
Over the 20 years 2006–2025, River Sioux logged 3 reports on 2 hail days, about 0.1 reports a year. That is 33% of the median Iowa town on this site (0.5 a year) and ranks #378 of 483 Iowa cities and towns on this site for all-time reports. River Sioux accounts for 6% of the 218 reports filed in Harrison County.
8% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Iowa town on this site. The largest hail on record here is 3.00 in (teacup) on June 12, 2024 near 1 NW Little Sioux.
The busiest year was 2004, with 3 reports on 3 days. Hail here peaks in May (33% of reports); 83% fall between April and June.
Reports a year 2006–2025 average
- River Sioux 0.1
- Harrison County 4.3
- Median Iowa town on this site 0.5
Hail days 2006–2025
- River Sioux 2
- Harrison County 53
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- River Sioux 8%
- Harrison County 6%
- Median Iowa town on this site 6%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 2 | 2 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 12, 2024 | 2 | 3.00 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 12, 2024 | 3.00 inteacup | 1 NW Little Sioux | Harrison | 19:29 local · NCEI |
| Jun 12, 2024 | 1.75 ingolf ball | 4 NW Little Sioux | Harrison | 19:08 local · NCEI |
| Jul 25, 2002 | 1.75 ingolf ball | 2 NW Little Sioux | Harrison | 03:55 local · NCEI |
| Apr 20, 2005 | 1.50 inping pong ball | 2 NW Little Sioux | Harrison | 04:25 local · NCEI |
| Sep 14, 2004 | 1.25 inhalf dollar | 3 NW Little Sioux | Harrison | 17:08 local · NCEI |
Size of every report
- Under 1 in 5 42%
- 1–2 in 6 50%
- 2 in + 1 8%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 12, 2024 | 3.00 inteacup | 1 NW Little Sioux | Harrison | 19:29 local · NCEI |
| Jun 12, 2024 | 1.75 ingolf ball | 4 NW Little Sioux | Harrison | 19:08 local · NCEI |
| May 5, 2007 | 0.88 innickel | 2.95 NNW River Sioux | Harrison | 19:00 local · NCEI |
| May 18, 2005 | 0.88 innickel | 2 S Little Sioux | Harrison | 01:10 local · NCEI |
| Apr 20, 2005 | 1.50 inping pong ball | 2 NW Little Sioux | Harrison | 04:25 local · NCEI |
| Sep 14, 2004 | 1.25 inhalf dollar | 3 NW Little Sioux | Harrison | 17:08 local · NCEI |
| Jun 14, 2004 | 1.00 inquarter | 3 NW Little Sioux | Harrison | 03:10 local · NCEI |
| Apr 20, 2004 | 0.88 innickel | 2 NW Little Sioux | Harrison | 20:05 local · NCEI |
| Jul 25, 2002 | 1.75 ingolf ball | 2 NW Little Sioux | Harrison | 03:55 local · NCEI |
| May 29, 2002 | 0.75 inpenny | 2 NW Little Sioux | Harrison | 02:00 local · NCEI |
| May 1, 2001 | 1.00 inquarter | 2 NW Little Sioux | Harrison | 16:49 local · NCEI |
| Jun 23, 2000 | 0.75 inpenny | 2 NW Little Sioux | Harrison | 20:23 local · NCEI |
Hail history near River Sioux
Questions about hail in River Sioux
How often does it hail in River Sioux, Iowa?
12 hail reports have been logged in and within about 5 km (3 miles) of River Sioux since 2000. Over the 20 years 2006–2025 that averages 0.1 reports a year. That ranks #378 of 483 Iowa places by number of reports.
When is hail season in River Sioux?
Most reports come in May, June, April. May alone accounts for 33% of all reports.
What is the largest hail recorded in River Sioux?
3.00 in (teacup size) on June 12, 2024 near 1 NW Little Sioux. 8% of reports here were 2 inches or larger.
When did it last hail in River Sioux?
The most recent report in this data is from June 12, 2024 (3.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has River Sioux had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was June 12, 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.