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McCook County, SD hail & severe wind history
124 storm reports on file for McCook County between 2010-06-11 and 2026-06-28 — 66 hail and 58 severe thunderstorm wind. That averages 7.3 reports a year, and Jul is the busiest month.
At a glance
- Most recent hail report: May 31, 2026 — 1" (quarter), 4.86 mi N of Bridgewater.
- Hail was reported on 39 days since 2010 — about 2.4 hail days a year.
- Largest hail on record: 2.75" (baseball) on Jul 22, 2023.
- McCook County has more hail reports than 37% of the 66 South Dakota counties we cover.
Search every McCook County report
Check a single date first, or filter the full record below — pick a year, narrow to a month, or drag the hail-size slider to see only the larger stones (1", quarter size, is the National Weather Service severe threshold).
Loading McCook County storm reports…
Worst storm days in McCook County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2022-05-12 | 10 | — | 125 mph |
| 2012-05-05 | 7 | 1.5" (ping pong ball) | 60 mph |
| 2022-07-05 | 6 | 1" (quarter) | 90 mph |
| 2012-05-01 | 5 | 1.75" (golf ball) | 60 mph |
| 2011-05-30 | 5 | 1.75" (golf ball) | 81 mph |
| 2023-07-22 | 4 | 2.75" (baseball) | — |
| 2021-08-28 | 4 | 1.75" (golf ball) | — |
| 2019-07-20 | 4 | — | 75 mph |
| 2026-05-31 | 3 | 1.75" (golf ball) | — |
| 2015-08-09 | 3 | 1.75" (golf ball) | 60 mph |
Reports by year
Report counts are driven partly by how many people were around to report a storm, so recent years tend to look busier than the early 2010s. Treat the trend as a reporting trend, not purely a weather trend.
Notable large-hail events (2" and up)
| Date | Size | Near | What was reported |
|---|---|---|---|
| 2023-07-22 | 2.75" baseball | 2.43 mi SW of Unityville | No narrative filed |
| 2023-07-22 | 2.5" tennis ball | 2.5 mi W of Salem | Hail up to tennis ball size was reported through a photo. |
| 2010-07-27 | 2.5" tennis ball | 2.11 mi WNW of Unityville | Hail was mostly quarter size and smaller, but with a few stones up to tennis ball size. |
When does hail hit McCook County?
Across 16 years of records, July produced the most reports (39), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 0 | 0.0% |
| March | 1 | 0.8% |
| April | 2 | 1.6% |
| May | 37 | 29.8% |
| June | 17 | 13.7% |
| July | 39 | 31.5% |
| August | 18 | 14.5% |
| September | 10 | 8.1% |
| October | 0 | 0.0% |
| November | 0 | 0.0% |
| December | 0 | 0.0% |
Neighboring counties
Counties that share a border with McCook County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Minnehaha County, SD | 351 | 3.5" |
| Hutchinson County, SD | 168 | 3" |
| Turner County, SD | 119 | 1.75" |
| Lake County, SD | 116 | 2" |
| Hanson County, SD | 54 | 2.75" |
| Miner County, SD | 50 | 2.75" |
See all 66 South Dakota counties →
Common questions about hail in McCook County
- How often does it hail in McCook County?
- Hail was reported on 39 separate days between 2010 and 2026, about 2.4 days a year, with July the busiest month for storm reports. 60 reports were quarter size (1") or larger.
- Does a report here mean hail hit my street?
- Not necessarily. Each report is one observation tied to a nearby landmark, and a county can be large. Storms also go unreported where few people live. Use the date check above to see what was reported nearby, and treat it as a starting point.
- How big is a 1.75" hailstone?
- Forecasters describe hail by everyday objects: 1" is a quarter, 1.75" a golf ball, 2.75" a baseball. The sizes in these reports are estimates made by the person reporting, not lab measurements.
- Where do I get the official record?
- All reports here come from the NOAA NCEI Storm Events Database, which you can search directly. For anything formal, use NOAA’s own records rather than this page.
Look up another place
About these numbers
Every row above is a report filed with the National Weather Service and archived in the NOAA NCEI Storm Events Database (FIPS 46087). Reports are eyewitness, trained-spotter and damage-survey observations, so they cluster near roads and towns and miss storms over empty country. Hail sizes are estimates. Damage figures are preliminary as filed and are never revised in this archive. Use this page for background, not for an insurance claim, a legal filing, or a roof assessment — for those, get the official record from NOAA directly.