Hail history for Stanley, North Dakota
NOAA hail reports in and within about 5 km (3 miles) of Stanley since 1979, with preliminary reports to November 3, 2026.
Readout · Stanley
- Last hail
- Aug 7, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 2 reports
- Largest ever
- 2.50 in
- tennis ball · Jul 14, 2004
29 reports on 24 days since 1979 · #28 of 208 North Dakota places
Hail map · Stanley
- 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 Stanley is from August 7, 2025. A local roofer can check and document it at no cost.
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What the record says about Stanley
The latest hail report in and around Stanley is from August 7, 2025, 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 August 7, 2025.
Over the 20 years 2006–2025, Stanley logged 14 reports on 12 hail days, about 0.7 reports a year. That is 75% more than the median North Dakota town on this site (0.4 a year) and ranks #28 of 208 North Dakota cities and towns on this site for all-time reports. Stanley accounts for 15% of the 189 reports filed in Mountrail County.
3% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median North Dakota town on this site. The largest hail on record here is 2.50 in (tennis ball) on July 14, 2004 near Stanley.
Reports held about level in 2016–2025 (7) compared with 2006–2015 (7). The busiest year was 2008, with 3 reports on 2 days. Hail here peaks in July (48% of reports); 24% fall between April and June.
Reports a year 2006–2025 average
- Stanley 0.7
- Mountrail County 5.7
- Median North Dakota town on this site 0.4
Hail days 2006–2025
- Stanley 12
- Mountrail County 59
- Median North Dakota town on this site 7
Share 2 in or larger of sized reports
- Stanley 3%
- Mountrail County 9%
- Median North Dakota town on this site 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 2 | 2 | |||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 7, 2025 | 1 | 1.00 in | — |
| Jul 12, 2024 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jul 14, 2004 | 2.50 intennis ball | Stanley | Mountrail | 22:58 local · NCEI |
| Aug 9, 2010 | 1.75 ingolf ball | 3.32 NNW Stanley | Mountrail | 18:46 local · NCEI |
| Jul 14, 2004 | 1.75 ingolf ball | Stanley | Mountrail | 22:55 local · NCEI |
| Jul 10, 1990 | 1.75 ingolf ball | — | Mountrail | 15:40 local · NCEI |
| Jul 15, 1982 | 1.75 ingolf ball | — | Mountrail | 17:30 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 7 24%
- 1–2 in 21 72%
- 2 in + 1 3%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 7, 2025 | 1.00 inquarter | 0.69 S Stanley | Mountrail | 20:03 local · NCEI |
| Jul 12, 2024 | 1.00 inquarter | Stanley Muni Arpt | Mountrail | 16:37 local · NCEI |
| Sep 2, 2021 | 1.00 inquarter | 1.38 W Stanley | Mountrail | 04:50 local · NCEI |
| Jun 14, 2020 | 1.00 inquarter | Stanley Muni Arpt | Mountrail | 23:51 local · NCEI |
| Jun 14, 2020 | 1.00 inquarter | 0.46 W Stanley | Mountrail | 20:14 local · NCEI |
| Aug 4, 2019 | 1.25 inhalf dollar | 0.46 W Stanley | Mountrail | 22:28 local · NCEI |
| Jul 31, 2016 | 1.00 inquarter | 0.69 S Stanley | Mountrail | 17:12 local · NCEI |
| Jun 9, 2013 | 0.75 inpenny | 0.46 W Stanley | Mountrail | 22:00 local · NCEI |
| Aug 9, 2010 | 1.75 ingolf ball | 3.32 NNW Stanley | Mountrail | 18:46 local · NCEI |
| Jul 2, 2010 | 0.75 inpenny | 0.46 W Stanley | Mountrail | 23:45 local · NCEI |
| Aug 2, 2008 | 1.00 inquarter | 3.32 NNW Stanley | Mountrail | 06:14 local · NCEI |
| Aug 2, 2008 | 1.00 inquarter | 3.09 NNW Stanley | Mountrail | 05:09 local · NCEI |
Hail history near Stanley
Questions about hail in Stanley
How often does it hail in Stanley, North Dakota?
29 hail reports have been logged in and within about 5 km (3 miles) of Stanley since 1979. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #28 of 208 North Dakota places by number of reports.
When is hail season in Stanley?
Most reports come in July, June, August. July alone accounts for 48% of all reports.
What is the largest hail recorded in Stanley?
2.50 in (tennis ball size) on July 14, 2004 near Stanley. 3% of reports here were 2 inches or larger.
When did it last hail in Stanley?
The most recent report in this data is from August 7, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Stanley 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 August 7, 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.