Natrona County was hit as recently as 2026-07-06, 25 days ago. Natrona County is hit in most years, often more than once. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2013-06-22 near Powder River.
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 2026-07-06, around Casper. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Natrona 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 35 separate hail days here since 2010 -- 2.1 a year over 17 years of record. Those days carry 69 separate reports between them, two or three on a typical one. 3 of those 17 years produced none at all. One year dominates the record: 2018 alone produced 8 of the 35 days. The last five years track the long-run rate, with 9 days since 2022.
4 of the 35 days reached 2 inches or more -- 11%, or about one hail day in 9, the last on 2025-06-16. They land in the same month as everything else, June. 14 of the 35 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 Midwest -- 12 of the county's 35 hail days -- then Casper (8), Evansville (8), Bar Nunn (6) and Edgerton (3). Beyond those, NOAA names Natrona and Natrona County Airport on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Midwest | 8 | 1.75″ |
| Evansville | 5 | 1.75″ |
| Casper | 3 | 1.75″ |
| Edgerton | 3 | 1.50″ |
| 17 N Bar Nunn | 2 | 1.75″ |
The season runs June through August: 31 of the 35 hail days on record fall in those 3 months (89%). June is the single busiest month, with 15 of them (43%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in May and September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 3 |
| June | 15 |
| July | 12 |
| August | 4 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Casper. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-06 | 1.00″ | 1 |
| 2026-06-25 | 1.00″ | 1 |
| 2025-06-16 | 2.00″ | 3 |
| 2023-09-10 | 1.75″ | 4 |
| 2023-07-06 | 1.75″ | 5 |
| 2023-06-23 | 2.50″ | 1 |
| 2023-06-20 | 1.75″ | 1 |
| 2023-05-17 | 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 2.75 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: Converse County (44 hail days), Johnson County (37) and Campbell County (132). Every one of them takes more hail than Natrona County.
Converse County · Johnson County · Campbell County
Back to the Wyoming hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Natrona County, Wyoming only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.