On the map: every storm report logged this day.
On the map
Storm reports for May 21, 1977
On May 21, 1977, 7 hail, 11 damaging-wind and 14 tornado reports were logged across 11 states.
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On May 21, 1977, 7 hail, 11 damaging-wind and 14 tornado reports were logged across 11 states. The largest hail reported was 1.75″ (golf ball size) in Wyandotte County, KS.
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 |
|---|---|---|---|---|
| SD | 0 | 0 | 8 | – |
| MO | 2 | 2 | 2 | 1.75″ |
| IA | 1 | 3 | 0 | 1.75″ |
| NE | 0 | 1 | 2 | – |
| IN | 1 | 0 | 1 | 0.75″ |
| WI | 1 | 1 | 0 | 0.75″ |
| MN | 0 | 1 | 1 | – |
| IL | 0 | 2 | 0 | – |
| KS | 1 | 0 | 0 | 1.75″ |
| KY | 1 | 0 | 0 | 1.25″ |
| OK | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Shawnee, KS | 69,724 | 1.75″ |
| Smithville, MO | 10,971 | 1.75″ |
| Bonner Springs, KS | 7,832 | 1.75″ |
| Edwardsville, KS | 4,748 | 1.75″ |
| Jefferson, IA | 4,148 | 1.75″ |
| Branson, MO | 12,869 | 1.50″ |
| Hollister, MO | 4,659 | 1.50″ |
| Hopkinsville, KY | 30,800 | 1.25″ |
Hail reports (7)
| Time (UTC) | Size | Location |
|---|---|---|
| 21:15 | 1.75″ | Wyandotte County, KS |
| 21:40 | 1.75″ | Clay County, MO |
| 23:50 | 1.75″ | Greene County, IA |
| 23:10 | 1.50″ | Taney County, MO |
| 00:00 | 1.25″ | Christian County, KY |
| 20:00 | 0.75″ | Posey County, IN |
| 01:15 | 0.75″ | Jackson County, WI |
Damage, injuries and deaths
National Weather Service offices recorded about $578,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (33 events in 11 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 |
|---|---|---|---|---|
| Le Sueur County, MN | 1 | 0 | 0 | $250,000 |
| Scott County, MN | 1 | 0 | 0 | $250,000 |
| Grundy County, MO | 1 | 0 | 0 | $25,000 |
| Harrison County, MO | 1 | 0 | 0 | $25,000 |
| Deuel County, SD | 1 | 0 | 0 | $25,000 |
| Grant County, SD | 1 | 0 | 0 | $3,000 |
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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