On the map: every storm report logged this day.
On the map
Storm reports for April 21, 1973
On April 21, 1973, 17 hail, 8 damaging-wind and 12 tornado reports were logged across 6 states.
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On April 21, 1973, 17 hail, 8 damaging-wind and 12 tornado reports were logged across 6 states. The largest hail reported was 4.00″ (grapefruit size) in Henry 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 |
|---|---|---|---|---|
| MO | 9 | 4 | 2 | 2.75″ |
| IA | 3 | 1 | 3 | 4.00″ |
| IL | 1 | 0 | 5 | 1.00″ |
| KS | 4 | 1 | 0 | 2.00″ |
| OK | 0 | 1 | 2 | – |
| WI | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| De Soto, KS | 6,579 | 2.00″ |
| Independence, MO | 121,629 | 1.75″ |
| Gladstone, MO | 27,579 | 1.75″ |
| Smithville, MO | 10,971 | 1.75″ |
| Harrisonville, MO | 9,980 | 1.75″ |
| Butler, MO | 4,283 | 1.75″ |
| Sugar Creek, MO | 3,223 | 1.75″ |
| Merriam, KS | 11,560 | 1.25″ |
| Mission, KS | 10,013 | 1.25″ |
| Roeland Park, KS | 6,689 | 1.25″ |
| Fairway, KS | 4,160 | 1.25″ |
| Mission Hills, KS | 3,521 | 1.25″ |
Hail reports (17)
| Time (UTC) | Size | Location |
|---|---|---|
| 21:00 | 4.00″ | Henry County, IA |
| 22:00 | 3.00″ | Des Moines County, IA |
| 20:00 | 2.75″ | Clay County, MO |
| 14:30 | 2.00″ | Leavenworth County, KS |
| 22:05 | 2.00″ | Chariton County, MO |
| 19:30 | 1.75″ | Crawford County, KS |
| 19:30 | 1.75″ | Clay County, MO |
| 20:00 | 1.75″ | Clay County, MO |
| 21:20 | 1.75″ | Cass County, MO |
| 21:25 | 1.75″ | Jackson County, MO |
| 23:18 | 1.75″ | Cass County, MO |
| 23:40 | 1.75″ | Bates County, MO |
| 19:40 | 1.50″ | Jackson County, MO |
| 20:20 | 1.25″ | Wyandotte County, KS |
| 22:00 | 1.00″ | Des Moines County, IL |
| 22:20 | 1.00″ | Delaware County, IA |
| 20:30 | 0.75″ | Labette County, KS |
Damage, injuries and deaths
National Weather Service offices recorded about $11.2 million in property damage and 11 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (41 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 |
|---|---|---|---|---|
| Iowa County, IA | 1 | 6 | 0 | – |
| Rock Island County, IL | 1 | 2 | 0 | $2.5 million |
| Jasper County, MO | 1 | 2 | 0 | $25,000 |
| Mercer County, MO | 1 | 1 | 0 | $250,000 |
| Henry County, IL | 1 | 0 | 0 | $2.5 million |
| Mercer County, IL | 1 | 0 | 0 | $2.5 million |
| Johnson County, IA | 1 | 0 | 0 | $2.5 million |
| Bureau County, IL | 2 | 0 | 0 | $500,000 |
| Putnam County, MO | 1 | 0 | 0 | $250,000 |
| Cook County, IL | 2 | 0 | 0 | $50,000 |
| Henry County, IA | 1 | 0 | 0 | $25,000 |
| Lee County, IA | 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.
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