Crook County was hit as recently as 2026-07-03, 28 days ago. Crook County is hit in most years, and usually several times over. The largest stone on record here is 3.25 inches and 3.2 times the National Weather Service's 1 inch severe criterion, reported on 2020-07-10 near Beulah.
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 2026-07-03, around Sundance. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Crook County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 123 separate hail days here since 2010 -- 7.2 a year over 17 years of record. Those days carry 272 separate reports between them, two or three on a typical one. No year since 2010 has gone by without at least one. The busiest single year was 2013, with 14 hail days. The last five years track the long-run rate, with 33 days since 2022.
19 of the 123 days reached 2 inches or more -- 15%, or about one hail day in 6, the last on 2024-08-19. Those big days do not follow the county's usual calendar: most of them fall in June, not July. 38 of the 123 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Wyoming, see the Wyoming hail map and history.
Reports cluster nearest Sundance -- 37 of the county's 123 hail days -- then Hulett (24), Aladdin (18), Oshoto (17) and Pine Haven (17). Beyond those, NOAA names Alva, Devils Tower, Colony, New Haven, Moorcroft, Beulah, Rockypoint, Carlile and Lightning Flat on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Sundance | 10 | 2.50″ |
| Devils Tower | 8 | 2.75″ |
| Pine Haven | 7 | 1.50″ |
| Hulett | 6 | 2.50″ |
| Aladdin | 6 | 1.50″ |
The season runs June through August: 102 of the 123 hail days on record fall in those 3 months (83%). July is the single busiest month, with 41 of them (33%). That peak sits inside the window rather than at either end. Hail has also been reported in April, May and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 1 |
| May | 16 |
| June | 39 |
| July | 41 |
| August | 22 |
| September | 4 |
That day put 6 reports on the map, the biggest 1.25 inches near Sundance. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-03 | 1.25″ | 6 |
| 2026-06-07 | 1.00″ | 1 |
| 2026-06-04 | 1.25″ | 1 |
| 2025-08-06 | 1.50″ | 2 |
| 2025-08-01 | 1.50″ | 1 |
| 2025-07-06 | 1.00″ | 1 |
| 2025-06-25 | 1.00″ | 1 |
| 2025-06-15 | 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 3.25 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: Weston County (91 hail days), Campbell County (132), Johnson County (37), Lawrence County, South Dakota (121) and Butte County, South Dakota (74). Crook County sits in between.
Weston County · Campbell County · Johnson County · Lawrence County, South Dakota · Butte County, South Dakota
Back to the Wyoming hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Crook County, Wyoming only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.