On the map: every storm report logged this day.
On the map
Storm reports for September 21, 1973
On September 21, 1973, 21 hail, 18 damaging-wind and 4 tornado reports were logged across 6 states.
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← Sep 20, 1973 All 1973 storm days · September 1973 Sep 22, 1973 →
Other storms on September 21 →
On September 21, 1973, 21 hail, 18 damaging-wind and 4 tornado reports were logged across 6 states. The largest hail reported was 3.00″ (teacup size) in Ogle County, IL.
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 | 11 | 11 | 3 | 2.75″ |
| IL | 4 | 3 | 0 | 3.00″ |
| WI | 5 | 2 | 0 | 2.75″ |
| MI | 0 | 2 | 0 | – |
| FL | 1 | 0 | 0 | 0.75″ |
| OR | 0 | 0 | 1 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Rochelle, IL | 9,510 | 3.00″ |
| Hudson, IA | 2,916 | 2.75″ |
| Merrill, WI | 9,445 | 1.75″ |
| Antigo, WI | 8,096 | 1.75″ |
| Independence, IA | 6,266 | 1.75″ |
| Medford, WI | 4,604 | 1.75″ |
| Eldora, IA | 2,595 | 1.75″ |
| Manchester, IA | 5,283 | 1.50″ |
| Seminole, FL | 19,395 | 0.75″ |
| Treasure Island, FL | 6,524 | 0.75″ |
| South Pasadena, FL | 5,280 | 0.75″ |
| Madeira Beach, FL | 4,014 | 0.75″ |
| Savanna, IL | 2,713 | 0.75″ |
Hail reports (21)
| Time (UTC) | Size | Location |
|---|---|---|
| 19:20 | 3.00″ | Ogle County, IL |
| 15:30 | 2.75″ | Tama County, IA |
| 20:15 | 2.75″ | Barron County, WI |
| 00:10 | 2.75″ | Black Hawk County, IA |
| 14:15 | 1.75″ | Webster County, IA |
| 14:50 | 1.75″ | Hardin County, IA |
| 15:14 | 1.75″ | Hardin County, IA |
| 15:25 | 1.75″ | Franklin County, IA |
| 16:30 | 1.75″ | Buchanan County, IA |
| 19:16 | 1.75″ | Ogle County, IL |
| 19:30 | 1.75″ | Chippewa County, WI |
| 20:30 | 1.75″ | Taylor County, WI |
| 21:00 | 1.75″ | Lincoln County, WI |
| 21:30 | 1.75″ | Langlade County, WI |
| 23:20 | 1.75″ | Franklin County, IA |
| 17:00 | 1.50″ | Delaware County, IA |
| 16:45 | 1.00″ | Delaware County, IA |
| 17:00 | 1.00″ | Dubuque County, IA |
| 20:15 | 1.00″ | Ogle County, IL |
| 18:30 | 0.75″ | Carroll County, IL |
| 19:45 | 0.75″ | Pinellas County, FL |
Damage, injuries and deaths
National Weather Service offices recorded about $53,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (43 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 |
|---|---|---|---|---|
| Tama County, IA | 1 | 0 | 0 | $25,000 |
| Webster County, IA | 1 | 0 | 0 | $25,000 |
| Hardin County, IA | 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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