Hail history for Big Horn County, Wyoming
Every NOAA hail report filed in Big Horn County since 1961, with preliminary National Weather Service reports to November 3, 2026.
Readout · Big Horn County
- Last hail
- May 26, 2023
- 1.25 in, half dollar size
- Hail days, last 5 years
- 3
- since Nov 3, 2021 · 3 reports
- Largest ever
- 2.50 in
- tennis ball · Aug 7, 2009
62 reports on 33 days since 1961 · #16 of 22 Wyoming counties
Hail map · Big Horn 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 Big Horn County
The latest hail report in Big Horn County is from May 26, 2023, 1.25 in (half dollar size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 1.25 in on May 26, 2023.
Over the 20 years 2006–2025, Big Horn County logged 40 reports on 20 hail days, about 2.0 reports a year. That is about half the median Wyoming county (4.5 a year) and ranks #16 of 22 Wyoming counties for all-time reports. Big Horn County holds 1% of all 4,952 hail reports in Wyoming.
8% of reports with a size were 2 inches (hen egg) or larger, against 5% for the median Wyoming county. The largest hail on record here is 2.50 in (tennis ball) on August 7, 2009 near 0.45 SE Greybull.
Reports were down 75% in 2016–2025 (8) compared with 2006–2015 (32). The busiest year was 2013, with 9 reports on 4 days. Hail here peaks in June (52% of reports); 68% fall between April and June.
Reports a year 2006–2025 average
- Big Horn County 2.0
- Median Wyoming county 4.5
Hail days 2006–2025
- Big Horn County 20
- Median Wyoming county 55.5
Share 2 in or larger of sized reports
- Big Horn County 8%
- Median Wyoming county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 2 | 2 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 2 | 3 | ||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 26, 2023 | 1 | 1.25 in | — |
| May 25, 2023 | 1 | 1.00 in | — |
| May 17, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Aug 7, 2009 | 2.50 intennis ball | 0.45 SE Greybull | — | 16:15 local · NCEI |
| Aug 7, 2009 | 2.00 inhen egg | 1.31 ESE Greybull | $2K | 16:17 local · NCEI |
| Aug 7, 2009 | 2.00 inhen egg | 0.55 S Greybull | $75K1 injured | 16:10 local · NCEI |
| Jun 14, 2006 | 2.00 inhen egg | 5 E Lovell | $12K | 12:25 local · NCEI |
| Jun 14, 2006 | 2.00 inhen egg | 2 ENE Emblem | — | 11:50 local · NCEI |
Size of every report
- Under 1 in 24 39%
- 1–2 in 33 53%
- 2 in + 5 8%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 26, 2023 | 1.25 inhalf dollar | 5 SW Byron | 14:50 local · NCEI |
| May 25, 2023 | 1.00 inquarter | 5.62 NW Greybull Arpt | 15:30 local · NCEI |
| May 17, 2022 | 1.00 inquarter | 3 N Basin | 16:20 local · NCEI |
| Jun 19, 2019 | 0.88 innickel | Basin | 16:35 local · NCEI |
| Jul 27, 2018 | 1.25 inhalf dollar | 8.3 ENE Cowley Arpt | 17:00 local · NCEI |
| Jul 26, 2018 | 1.75 ingolf ball | 2.93 ENE Frannie | 17:20 local · NCEI |
| May 31, 2018 | 0.88 innickel | 26 E Lovell | 15:50 local · NCEI |
| Jun 12, 2017 | 1.50 inping pong ball | Manderson | 15:00 local · NCEI |
| Jul 27, 2015 | 1.75 ingolf ball | 0.55 WSW Emblem | 14:48 local · NCEI |
| Jul 27, 2015 | 1.00 inquarter | 0.28 SSW Burlington | 14:43 local · NCEI |
| Jun 9, 2015 | 0.75 inpenny | 8.49 NNW Shell | 20:13 local · NCEI |
| May 31, 2014 | 0.88 innickel | 1.16 NNW Lovell | 14:12 local · NCEI |
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 |
|---|---|---|---|
| Burlington | 9 | 7 | Jul 27, 2015 |
| Greybull | 9 | 6 | Jun 13, 2013 |
| Basin | 5 | 5 | May 17, 2022 |
| Byron | 5 | 4 | May 23, 2013 |
| Cowley | 4 | 3 | May 23, 2013 |
| Lovell | 4 | 3 | May 31, 2014 |
| Manderson | 2 | 2 | Jun 12, 2017 |
| Deaver | 1 | 1 | Jun 9, 2000 |
| Garland | 1 | 1 | May 26, 2023 |
| Hyattville | 1 | 1 | Aug 1, 2013 |
| Shell | 1 | 1 | Jun 25, 1991 |
Questions about hail in Big Horn County
How often does it hail in Big Horn County, Wyoming?
62 hail reports have been logged in Big Horn County since 1961. Over the 20 years 2006–2025 that averages 2.0 reports a year. That ranks #16 of 22 Wyoming counties by number of reports.
When is hail season in Big Horn County?
Most reports come in June, May, August. June alone accounts for 52% of all reports.
What is the largest hail recorded in Big Horn County?
2.50 in (tennis ball size) on August 7, 2009 near 0.45 SE Greybull. 8% of reports here were 2 inches or larger.
When did it last hail in Big Horn County?
The most recent report in this data is from May 26, 2023 (1.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Big Horn County had in the last five years?
3 separate days with hail reports since November 3, 2021, adding up to 3 reports. The most recent was May 26, 2023.
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.