The most recent reported hail day was 2026-04-27, 95 days ago. Cooper County is hit in about half the years on record. 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 2026-04-27 near Bunceton.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Missouri. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-27, around Bunceton. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Cooper 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 14 separate hail days here since 2010 -- 0.8 a year over 17 years of record. They carry 23 reports in total: most hail days here are logged from a single spot. 9 of those 17 years produced none at all. One year dominates the record: 2011 alone produced 3 of the 14 days. The last five years track the long-run rate, with 5 days since 2022.
2 of the 14 days reached 2 inches or more -- 14%, or about one hail day in 7, the last on 2026-04-27. Those big days do not follow the county's usual calendar: most of them fall in April, not June. 5 of the 14 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Missouri, see the Missouri hail map and history.
Reports cluster nearest Boonville -- 9 of the county's 14 hail days -- then Bunceton (2) and Otterville (2). That one town is named on 64% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Boonville | 6 | 1.75″ |
| Otterville | 2 | 1.75″ |
| 2 SSW Bunceton | 1 | 2.75″ |
| 5 Se Boonville | 1 | 2.75″ |
| 1 N Boonville | 1 | 1.75″ |
The season runs March through June: 13 of the 14 hail days on record fall in those 4 months (93%). June is the single busiest month, with 5 of them (36%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| March | 3 |
| April | 3 |
| May | 2 |
| June | 5 |
| September | 1 |
That day put 1 report on the map, the biggest 2.75 inches near Bunceton. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-27 | 2.75″ | 1 |
| 2024-06-25 | 1.00″ | 1 |
| 2024-03-14 | 1.50″ | 1 |
| 2023-06-30 | 1.75″ | 1 |
| 2023-03-31 | 1.25″ | 2 |
| 2017-06-29 | 1.00″ | 1 |
| 2017-05-27 | 1.00″ | 1 |
| 2014-04-03 | 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: Boone County (38 hail days), Saline County (14) and Pettis County (27). Cooper County sits in between.
Boone County · Saline County · Pettis County
Back to the Missouri hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Cooper County, Missouri only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.