On the map: every storm report logged this day.
On the map
Storm reports for May 18, 1971
On May 18, 1971, 13 hail, 19 damaging-wind and 12 tornado reports were logged across 6 states.
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On May 18, 1971, 13 hail, 19 damaging-wind and 12 tornado reports were logged across 6 states. The largest hail reported was 3.00″ (teacup size) in Appanoose County, IA.
Storm day runs 7 a.m. to 7 a.m. Eastern (12:00–12:00 UTC), the convention the Storm Prediction Center uses. Radar hail estimates start October 2019.
Storm reports by state
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| IA | 5 | 11 | 7 | 3.00″ |
| KS | 4 | 1 | 1 | 1.75″ |
| OK | 2 | 2 | 1 | 1.75″ |
| MI | 1 | 3 | 0 | 0.75″ |
| WI | 0 | 1 | 3 | – |
| MO | 1 | 1 | 0 | 1.00″ |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Iowa City, IA | 76,710 | 2.00″ |
| Coralville, IA | 23,959 | 2.00″ |
| Baldwin City, KS | 4,985 | 1.75″ |
| Ellsworth, KS | 3,116 | 1.75″ |
| Bixby, OK | 31,728 | 0.75″ |
| Jenks, OK | 27,869 | 0.75″ |
| Mount Vernon, IA | 4,518 | 0.75″ |
Hail reports (13)
| Time (UTC) | Size | Location |
|---|---|---|
| 22:50 | 3.00″ | Appanoose County, IA |
| 23:20 | 2.50″ | Wapello County, IA |
| 21:10 | 2.00″ | Benton County, IA |
| 00:50 | 2.00″ | Johnson County, IA |
| 12:50 | 1.75″ | Ellsworth County, KS |
| 20:30 | 1.75″ | Douglas County, KS |
| 22:36 | 1.75″ | Osage County, OK |
| 19:30 | 1.00″ | Jefferson County, KS |
| 20:30 | 1.00″ | DeKalb County, MO |
| 12:00 | 0.75″ | Crawford County, KS |
| 14:30 | 0.75″ | Grand Traverse County, MI |
| 23:20 | 0.75″ | Tulsa County, OK |
| 01:15 | 0.75″ | Linn County, IA |
Damage, injuries and deaths
National Weather Service offices recorded about $1.3 million in property damage and 11 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (51 events in 6 states). Before 1996 the database holds only tornado, hail and wind events, and damage was often entered as a range, so treat these figures as rough. Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Adams County, WI | 1 | 5 | 0 | $250,000 |
| Platte County, MO | 1 | 4 | 0 | $25,000 |
| Buchanan County, MO | 2 | 2 | 0 | $50,000 |
| Benton County, IA | 2 | 0 | 0 | $275,000 |
| Mahaska County, IA | 1 | 0 | 0 | $250,000 |
| Waushara County, WI | 1 | 0 | 0 | $250,000 |
| DeKalb County, MO | 2 | 0 | 0 | $50,000 |
| Iowa County, IA | 1 | 0 | 0 | $25,000 |
| Keokuk County, IA | 1 | 0 | 0 | $25,000 |
| Marion County, IA | 1 | 0 | 0 | $25,000 |
| Wapello County, IA | 1 | 0 | 0 | $25,000 |
| Leavenworth County, KS | 1 | 0 | 0 | $25,000 |
Source: NOAA National Centers for Environmental Information (NCEI), Storm Events Database, as entered by National Weather Service offices; data through July 31, 2026. Damage is in dollars of the year, not adjusted for inflation.
Guides: What radar-estimated hail (MESH) is and isn't · Storm reports: preliminary vs final
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