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Washington County, MO hail & severe wind history
100 storm reports on file for Washington County between 2010-08-10 and 2026-06-01 — 58 hail and 42 severe thunderstorm wind. That averages 5.9 reports a year, and May is the busiest month.
At a glance
- Most recent hail report: Apr 27, 2026 — 1.75" (golf ball), 0.88 mi SE of Caledonia.
- Hail was reported on 33 days since 2010 — about 1.9 hail days a year.
- Largest hail on record: 4" (grapefruit) on Apr 27, 2026.
- Washington County has more hail reports than 54% of the 115 Missouri counties we cover.
Search every Washington 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 Washington County storm reports…
Worst storm days in Washington County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2026-04-27 | 5 | 4" (grapefruit) | — |
| 2011-06-26 | 4 | 2" (hen egg) | 60 mph |
| 2024-05-08 | 4 | 1.75" (golf ball) | 69 mph |
| 2011-06-25 | 4 | 1.75" (golf ball) | — |
| 2016-05-11 | 4 | 1.25" (half dollar) | 64 mph |
| 2017-02-28 | 3 | 1.75" (golf ball) | — |
| 2011-05-25 | 3 | 1.75" (golf ball) | — |
| 2011-05-13 | 3 | 1.5" (ping pong ball) | — |
| 2018-05-31 | 2 | 2.5" (tennis ball) | 64 mph |
| 2015-04-08 | 2 | 2" (hen egg) | — |
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 |
|---|---|---|---|
| 2026-04-27 | 2" hen egg | .88 mi NE of Irondale | No narrative filed |
| 2026-04-27 | 4" grapefruit | 5.55 mi NNE of Pea Ridge | Numerous hailstones measuring 2 inches to 4 inches. |
| 2018-05-31 | 2.5" tennis ball | 1.47 mi SSE of Hunters Mill | No narrative filed |
| 2015-04-08 | 2" hen egg | 1.93 mi NW of Latty | No narrative filed |
| 2015-04-02 | 2.75" baseball | .51 mi SSE of Shirley | A wide swath of large hail fell across central Washington County. Most of the hail was the size of golfballs, but there was a report of baseball sized hail 7 miles west of Potosi. |
| 2011-06-26 | 2" hen egg | .8 mi SSW of Connon Mines | No narrative filed |
When does hail hit Washington County?
Across 17 years of records, May produced the most reports (23), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 1 | 1.0% |
| February | 3 | 3.0% |
| March | 7 | 7.0% |
| April | 18 | 18.0% |
| May | 23 | 23.0% |
| June | 17 | 17.0% |
| July | 9 | 9.0% |
| August | 10 | 10.0% |
| September | 6 | 6.0% |
| October | 4 | 4.0% |
| November | 1 | 1.0% |
| December | 1 | 1.0% |
Neighboring counties
Counties that share a border with Washington County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Franklin County, MO | 265 | 4" |
| Jefferson County, MO | 213 | 3" |
| St. Francois County, MO | 140 | 3" |
| Crawford County, MO | 108 | 3" |
| Iron County, MO | 62 | 2" |
See all 115 Missouri counties →
Common questions about hail in Washington County
- How often does it hail in Washington County?
- Hail was reported on 33 separate days between 2010 and 2026, about 1.9 days a year, with May the busiest month for storm reports. 47 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 29221). 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.