The most recent reported hail day was 2025-06-01 -- 1 year ago, with nothing reported since. Park County is hit in about half the years on record. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2023-05-25 near Meeteetse.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Wyoming. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2025-06-01, around Mammoth. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Park County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->NOAA's Storm Prediction Center has logged 13 separate hail days here since 2010 -- 0.8 a year over 17 years of record. They carry 16 reports in total: most hail days here are logged from a single spot. 10 of those 17 years produced none at all. The busiest single year was 2025, with 2 hail days. The last five years track the long-run rate, with 4 days since 2022.
Most hail here stays under 2 inches: only 1 of the 13 days on record passed it, 8%, the last on 2023-05-25. Those big days do not follow the county's usual calendar: most of them fall in May, not June.
Across the whole of Wyoming, see the Wyoming hail map and history.
Reports cluster nearest Meeteetse -- 5 of the county's 13 hail days -- then Cody (3).
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Meeteetse | 3 | 1.75″ |
| 2 Nne Meeteetse | 1 | 2.00″ |
| Clark | 1 | 1.50″ |
| 1 Nne Cody | 1 | 1.00″ |
| 10 Ene Cody | 1 | 1.00″ |
The season runs May through July: 11 of the 13 hail days on record fall in those 3 months (85%). June is the single busiest month, with 6 of them (46%). That peak sits inside the window rather than at either end. Hail has also been reported in April and August, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| April | 1 |
| May | 3 |
| June | 6 |
| July | 2 |
| August | 1 |
That day put 1 report on the map, the biggest 1 inch near Mammoth. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-06-01 | 1.00″ | 1 |
| 2025-04-27 | 1.00″ | 1 |
| 2023-05-26 | 1.00″ | 1 |
| 2023-05-25 | 2.00″ | 2 |
| 2018-06-06 | 1.00″ | 1 |
| 2018-05-21 | 1.00″ | 1 |
| 2015-07-03 | 1.00″ | 1 |
| 2015-06-05 | 1.00″ | 1 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 2 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own, over the state line included: Fremont County (19 hail days), Sheridan County (45), Johnson County (37), Carbon County, Montana (21) and Stillwater County, Montana (42). Every one of them takes more hail than Park County.
Fremont County · Sheridan County · Johnson County · Carbon County, Montana · Stillwater County, Montana
Back to the Wyoming hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Park County, Wyoming only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.