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Grundy County, MO hail & severe wind history
182 storm reports on file for Grundy County between 2010-04-02 and 2026-05-16 — 98 hail and 84 severe thunderstorm wind. That averages 10.7 reports a year, and May is the busiest month.
At a glance
- Most recent hail report: May 16, 2026 — 1.75" (golf ball), 0.69 mi S of Trenton Arpt.
- Hail was reported on 35 days since 2010 — about 2.1 hail days a year.
- Largest hail on record: 4.25" (grapefruit) on May 10, 2014.
- Grundy County has more hail reports than 80% of the 115 Missouri counties we cover.
Search every Grundy 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 Grundy County storm reports…
Worst storm days in Grundy County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2026-05-16 | 33 | 3" (teacup) | 71 mph |
| 2014-05-10 | 10 | 4.25" (grapefruit) | — |
| 2011-06-09 | 10 | 2.75" (baseball) | 60 mph |
| 2018-08-28 | 6 | 1.25" (half dollar) | 70 mph |
| 2011-05-21 | 6 | 0.88" (nickel) | 60 mph |
| 2023-05-06 | 5 | 4" (grapefruit) | — |
| 2011-03-22 | 5 | 1.5" (ping pong ball) | 60 mph |
| 2010-06-04 | 4 | 2" (hen egg) | — |
| 2017-06-28 | 4 | 1.5" (ping pong ball) | 75 mph |
| 2025-03-14 | 4 | — | 70 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 |
|---|---|---|---|
| 2026-05-16 | 2.75" baseball | 2.1 mi SE of Edinburg | Baseball sized hail was reported west of Trenton. Hail damaged a windshield. |
| 2026-05-16 | 3" teacup | 2.11 mi E of Trenton Arpt | Three inch diameter hail was reported east of Trenton. |
| 2026-05-16 | 2.75" baseball | 1.74 mi SE of Trenton Arpt | Chaser reports baseball size hail south of Trenton along Hwy 65. |
| 2026-05-16 | 2.5" tennis ball | .69 mi S of Dunlap | Tennis ball sized hail reported in the community of Dunlap between Trenton and Galt. |
| 2026-05-16 | 2" hen egg | 2.22 mi ESE of Parkerton | Two inch hail was reported between Trenton and Tindall. |
| 2026-05-16 | 2.5" tennis ball | 2.96 mi SSW of Dunlap | Tennis ball sized hail reported east of Trenton. |
| 2026-05-16 | 3" teacup | 3.19 mi SSE of Dunlap | Three inch hail was reported east of Trenton along Highway 6. |
| 2026-05-16 | 2.5" tennis ball | 2.22 mi ESE of Dunlap | Tennis ball sized hail reported west of Galt. Damage reported to vehicles. |
When does hail hit Grundy County?
Across 17 years of records, May produced the most reports (71), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 0 | 0.0% |
| March | 14 | 7.7% |
| April | 9 | 4.9% |
| May | 71 | 39.0% |
| June | 53 | 29.1% |
| July | 6 | 3.3% |
| August | 15 | 8.2% |
| September | 9 | 4.9% |
| October | 0 | 0.0% |
| November | 3 | 1.6% |
| December | 2 | 1.1% |
Neighboring counties
Counties that share a border with Grundy County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Harrison County, MO | 147 | 4" |
| Daviess County, MO | 143 | 4" |
| Linn County, MO | 95 | 2.75" |
| Livingston County, MO | 78 | 2" |
| Sullivan County, MO | 74 | 2" |
| Mercer County, MO | 60 | 2.75" |
See all 115 Missouri counties →
Common questions about hail in Grundy County
- How often does it hail in Grundy County?
- Hail was reported on 35 separate days between 2010 and 2026, about 2.1 days a year, with May the busiest month for storm reports. 79 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 29079). 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.