Hail history for Griswold, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Griswold since 1991, with preliminary reports to November 3, 2026.
Readout · Griswold
- Last hail
- Jun 15, 2025
- 1.50 in, ping pong ball size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 2 reports
- Largest ever
- 1.75 in
- golf ball · Sep 17, 2022
23 reports on 17 days since 1991 · #125 of 483 Iowa places
Hail map · Griswold
- 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 Griswold
The latest hail report in and around Griswold is from June 15, 2025, 1.50 in (ping pong ball size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.75 in on September 17, 2022.
Over the 20 years 2006–2025, Griswold logged 12 reports on 10 hail days, about 0.6 reports a year. That is 33% more than the median Iowa town on this site (0.5 a year) and ranks #125 of 483 Iowa cities and towns on this site for all-time reports. Griswold accounts for 13% of the 175 reports filed in Cass County.
0% 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 1.75 in (golf ball) on September 17, 2022 near 0.86 NE Griswold.
Reports were down 80% in 2016–2025 (2) compared with 2006–2015 (10). The busiest year was 2001, with 9 reports on 5 days. Hail here peaks in April (35% of reports); 70% fall between April and June.
Reports a year 2006–2025 average
- Griswold 0.6
- Cass County 3.1
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Griswold 10
- Cass County 42
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Griswold 0%
- Cass County 13%
- 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 | 1 | 1 | |||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 15, 2025 | 1 | 1.50 in | — |
| Sep 17, 2022 | 1 | 1.75 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Sep 17, 2022 | 1.75 ingolf ball | 0.86 NE Griswold | Cass | — | 19:58 local · NCEI |
| Oct 22, 2001 | 1.75 ingolf ball | Chariton | Lucas | $25K | 15:00 local · NCEI |
| May 13, 2001 | 1.75 ingolf ball | Griswold | Cass | $15K | 06:20 local · NCEI |
| Apr 10, 2001 | 1.75 ingolf ball | Griswold | Cass | $15K | 12:05 local · NCEI |
| Apr 10, 2001 | 1.75 ingolf ball | Griswold | Cass | $15K | 12:00 local · NCEI |
Size of every report
- Under 1 in 7 30%
- 1–2 in 16 70%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 15, 2025 | 1.50 inping pong ball | 0.86 NE Griswold | Cass | — | 19:55 local · NCEI |
| Sep 17, 2022 | 1.75 ingolf ball | 0.86 NE Griswold | Cass | — | 19:58 local · NCEI |
| Jun 3, 2014 | 1.50 inping pong ball | 1.05 N Griswold | Cass | $15K | 16:22 local · NCEI |
| Apr 27, 2014 | 0.75 inpenny | 12.97 NE Kemling | Pottawattamie | — | 11:18 local · NCEI |
| Mar 29, 2012 | 1.00 inquarter | 2.81 S Griswold | Cass | — | 19:10 local · NCEI |
| Mar 22, 2011 | 1.00 inquarter | 2.81 S Griswold | Cass | $1K | 16:05 local · NCEI |
| Sep 19, 2010 | 1.50 inping pong ball | 1.71 ESE Griswold | Cass | $5K | 00:36 local · NCEI |
| Apr 29, 2010 | 0.88 innickel | 1.48 SSE Griswold | Cass | — | 19:40 local · NCEI |
| Apr 29, 2010 | 1.00 inquarter | 0.52 E Griswold | Cass | $5K | 19:39 local · NCEI |
| Apr 29, 2010 | 0.88 innickel | 0.86 SE Griswold | Cass | — | 19:38 local · NCEI |
| Sep 23, 2008 | 0.75 inpenny | 1 SE Griswold | Cass | — | 20:59 local · NCEI |
| Apr 15, 2006 | 0.88 innickel | 1 NW Griswold | Cass | $2K | 19:30 local · NCEI |
Hail history near Griswold
Questions about hail in Griswold
How often does it hail in Griswold, Iowa?
23 hail reports have been logged in and within about 5 km (3 miles) of Griswold since 1991. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #125 of 483 Iowa places by number of reports.
When is hail season in Griswold?
Most reports come in April, May, March. April alone accounts for 35% of all reports.
What is the largest hail recorded in Griswold?
1.75 in (golf ball size) on September 17, 2022 near 0.86 NE Griswold. 0% of reports here were 2 inches or larger.
When did it last hail in Griswold?
The most recent report in this data is from June 15, 2025 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Griswold had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was June 15, 2025.
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.