Hail history for Natrona County, Wyoming
Every NOAA hail report filed in Natrona County since 1959, with preliminary National Weather Service reports to November 5, 2026.
Readout · Natrona County
- Last hail
- Jul 6, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 12
- since Nov 5, 2021 · 19 reports
- Largest ever
- 3.00 in
- teacup · May 29, 1964
167 reports on 110 days since 1959 · #9 of 22 Wyoming counties
Hail map · Natrona 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 Natrona County
The latest hail report in Natrona County is from July 6, 2026, 1.00 in (quarter size). Since November 5, 2021 there have been 12 separate hail days; the biggest stones in that time were 2.50 in on June 23, 2023.
Over the 20 years 2006–2025, Natrona County logged 107 reports on 63 hail days, about 5.3 reports a year. That is 18% more than the median Wyoming county (4.5 a year) and ranks #9 of 22 Wyoming counties for all-time reports. Natrona County holds 3% of all 4,952 hail reports in Wyoming.
7% 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 3.00 in (teacup) on May 29, 1964.
Reports were down 33% in 2016–2025 (43) compared with 2006–2015 (64). The busiest year was 2018, with 13 reports on 9 days. Hail here peaks in June (32% of reports); 49% fall between April and June.
Reports a year 2006–2025 average
- Natrona County 5.3
- Median Wyoming county 4.5
Hail days 2006–2025
- Natrona County 63
- Median Wyoming county 55.5
Share 2 in or larger of sized reports
- Natrona County 7%
- Median Wyoming county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | 2 | ||||||||||
| 2025 | 3 | 2 | 5 | ||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 2 | 3 | 3 | 2 | 10 | ||||||||
| 2022 | 1 | 1 | 2 | ||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 1 | 1 | 2 | ||||||||||
| 2019 | 3 | 1 | 4 | ||||||||||
| 2018 | 2 | 2 | 8 | 1 | 13 | ||||||||
| 2017 | 4 | 4 |
Hail days since Nov 5, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 6, 2026 | 1 | 1.00 in | — |
| Jun 25, 2026 | 1 | 1.00 in | — |
| Jul 29, 2025 | 2 | 0.88 in | — |
| Jun 16, 2025 | 3 | 2.25 in | — |
| Sep 10, 2023 | 2 | 1.75 in | — |
| Jul 6, 2023 | 3 | 1.75 in | — |
| Jun 29, 2023 | 1 | 1.00 in | — |
| Jun 23, 2023 | 1 | 2.50 in | — |
| Jun 20, 2023 | 1 | 1.75 in | — |
| May 17, 2023 | 2 | 1.00 in | — |
| Jun 3, 2022 | 1 | 1.00 in | — |
| May 17, 2022 | 1 | 0.88 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 29, 1964 | 3.00 inteacup | — | — | 14:40 local · NCEI |
| Jun 22, 2013 | 2.75 inbaseball | 0.66 ENE Powder River | $10K | 11:47 local · NCEI |
| Jun 23, 1974 | 2.75 inbaseball | — | — | 17:00 local · NCEI |
| Jun 23, 2023 | 2.50 intennis ball | 9.65 NE Merino | — | 14:15 local · NCEI |
| Jun 16, 2025 | 2.25 inhen egg | 6 NW Mills | — | 15:48 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 52 31%
- 1–2 in 103 62%
- 2 in + 12 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 6, 2026 | 1.00 inquarter | Casper | 16:16 local · NCEI |
| Jun 25, 2026 | 1.00 inquarter | 5 S Midwest | 13:40 local · NCEI |
| Jul 29, 2025 | 0.88 innickel | 4 NNW Bar Nunn | 17:38 local · NCEI |
| Jul 29, 2025 | 0.88 innickel | 4 NW Mills | 17:12 local · NCEI |
| Jun 16, 2025 | 1.00 inquarter | 5 SW Mills | 19:20 local · NCEI |
| Jun 16, 2025 | 2.25 inhen egg | 6 NW Mills | 15:48 local · NCEI |
| Jun 16, 2025 | 2.00 inhen egg | 0.56 ESE (Cpr)natrona Co Arpt | 14:45 local · NCEI |
| Sep 10, 2023 | 1.00 inquarter | 4 NNW (Cpr)natrona Co Arpt | 15:06 local · NCEI |
| Sep 10, 2023 | 1.75 ingolf ball | 6 WSW Midwest | 13:33 local · NCEI |
| Jul 6, 2023 | 1.75 ingolf ball | 19.27 NNW Merino | 19:02 local · NCEI |
| Jul 6, 2023 | 1.75 ingolf ball | 22 N Natrona | 19:02 local · NCEI |
| Jul 6, 2023 | 1.50 inping pong ball | 10.56 S Columbine | 15:37 local · NCEI |
Cities and towns in Natrona County
| Place | Reports | Largest |
|---|---|---|
| Casper | 29 | 2.00 in |
| Midwest | 17 | 1.75 in |
| Vista West | 17 | 2.75 in |
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 |
|---|---|---|---|
| Casper Mountain | 7 | 5 | Aug 5, 2018 |
| Antelope Hills | 4 | 4 | Jul 4, 2019 |
| Powder River | 4 | 3 | Jun 22, 2013 |
| Bessemer Bend | 3 | 3 | Aug 25, 2009 |
| Homa Hills | 3 | 3 | Jul 29, 2025 |
| Meadow Acres | 3 | 2 | Jul 1, 2015 |
| Red Butte | 3 | 2 | May 7, 2008 |
| Bar Nunn | 2 | 2 | Jun 8, 2011 |
| Brookhurst | 2 | 2 | Jun 5, 2017 |
| Edgerton | 2 | 2 | Aug 17, 2015 |
| Evansville | 2 | 2 | Aug 4, 2021 |
| Mills | 2 | 1 | Sep 20, 2009 |
| Alcova | 1 | 1 | Apr 30, 2007 |
| Mountain View | 1 | 1 | Jul 12, 2009 |
Questions about hail in Natrona County
How often does it hail in Natrona County, Wyoming?
167 hail reports have been logged in Natrona County since 1959. Over the 20 years 2006–2025 that averages 5.3 reports a year. That ranks #9 of 22 Wyoming counties by number of reports.
When is hail season in Natrona County?
Most reports come in June, July, May. June alone accounts for 32% of all reports.
What is the largest hail recorded in Natrona County?
3.00 in (teacup size) on May 29, 1964. 7% of reports here were 2 inches or larger.
When did it last hail in Natrona County?
The most recent report in this data is from July 6, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 5, 2026.
How many hail storms has Natrona County had in the last five years?
12 separate days with hail reports since November 5, 2021, adding up to 19 reports. The most recent was July 6, 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.