Hail history for Allamakee County, Iowa
Every NOAA hail report filed in Allamakee County since 1958, with preliminary National Weather Service reports to November 3, 2026.
Readout · Allamakee County
- Last hail
- Apr 17, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 3 reports
- Largest ever
- 2.50 in
- tennis ball · May 11, 2000
96 reports on 54 days since 1958 · #85 of 100 Iowa counties
Hail map · Allamakee 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 Allamakee County
The latest hail report in Allamakee County is from April 17, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.00 in on April 17, 2026.
Over the 20 years 2006–2025, Allamakee County logged 42 reports on 22 hail days, about 2.1 reports a year. That is 43% less than the median Iowa county (3.7 a year) and ranks #85 of 100 Iowa counties for all-time reports. Allamakee County holds 1% of all 16,032 hail reports in Iowa.
7% 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 2.50 in (tennis ball) on May 11, 2000 near Dorchester.
Reports were down 92% in 2016–2025 (3) compared with 2006–2015 (39). The busiest year was 2000, with 13 reports on 7 days. Hail here peaks in May (23% of reports); 63% fall between April and June.
Reports a year 2006–2025 average
- Allamakee County 2.1
- Median Iowa county 3.7
Hail days 2006–2025
- Allamakee County 22
- Median Iowa county 39.5
Share 2 in or larger of sized reports
- Allamakee County 7%
- Median Iowa county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 2 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 1 | 1 | |||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Apr 17, 2026 | 2 | 1.00 in | — |
| Sep 21, 2024 | 1 | 0.88 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 11, 2000 | 2.50 intennis ball | Dorchester | $15K | 19:17 local · NCEI |
| Sep 4, 2012 | 2.00 inhen egg | 0.5 E Chester | — | 17:31 local · NCEI |
| Apr 17, 2004 | 2.00 inhen egg | Waukon | $2K | 21:10 local · NCEI |
| May 18, 1996 | 2.00 inhen egg | Dorchester | $130K | 00:45 local · NCEI |
| Aug 18, 1978 | 2.00 inhen egg | — | — | 02:13 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 48 50%
- 1–2 in 41 43%
- 2 in + 7 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Apr 17, 2026 | 1.00 inquarter | 0.5 E Postville | 15:18 local · NCEI |
| Apr 17, 2026 | 1.00 inquarter | Harpers Ferry | 14:51 local · NCEI |
| Sep 21, 2024 | 0.88 innickel | 2 E New Albin | 15:43 local · NCEI |
| Apr 13, 2018 | 0.88 innickel | 2.94 SSW Ludlow | 06:17 local · NCEI |
| May 17, 2017 | 0.75 inpenny | Harpers Ferry | 15:33 local · NCEI |
| Jun 29, 2015 | 0.88 innickel | Harpers Ferry | 17:28 local · NCEI |
| Jun 29, 2015 | 1.00 inquarter | 3.42 SW Wexford | 17:20 local · NCEI |
| Jun 29, 2015 | 1.00 inquarter | 1.71 NW Lansing | 17:08 local · NCEI |
| Aug 18, 2014 | 0.75 inpenny | 3.74 NE Waukon Muni Arpt | 16:30 local · NCEI |
| Aug 18, 2014 | 1.00 inquarter | Waukon | 16:15 local · NCEI |
| Jun 29, 2014 | 0.88 innickel | 1.66 ENE Ludlow | 20:10 local · NCEI |
| Jun 29, 2014 | 0.75 inpenny | Waukon | 20:10 local · NCEI |
Cities and towns in Allamakee County
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 |
|---|---|---|---|
| New Albin | 7 | 6 | Sep 21, 2024 |
| Harpers Ferry | 5 | 5 | Apr 17, 2026 |
| Waterville | 1 | 1 | Jun 18, 2009 |
Questions about hail in Allamakee County
How often does it hail in Allamakee County, Iowa?
96 hail reports have been logged in Allamakee County since 1958. Over the 20 years 2006–2025 that averages 2.1 reports a year. That ranks #85 of 100 Iowa counties by number of reports.
When is hail season in Allamakee County?
Most reports come in May, April, July. May alone accounts for 23% of all reports.
What is the largest hail recorded in Allamakee County?
2.50 in (tennis ball size) on May 11, 2000 near Dorchester. 7% of reports here were 2 inches or larger.
When did it last hail in Allamakee County?
The most recent report in this data is from April 17, 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 Allamakee County had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 3 reports. The most recent was April 17, 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.