On the map: every storm report logged this day.
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Storm reports for August 21, 1971
On August 21, 1971, 11 hail, 5 damaging-wind and 2 tornado reports were logged across 8 states.
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← Aug 20, 1971 All 1971 storm days · August 1971 Aug 22, 1971 →
On August 21, 1971, 11 hail, 5 damaging-wind and 2 tornado reports were logged across 8 states. The largest hail reported was 3.00″ (teacup size) in Jackson 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 |
|---|---|---|---|---|
| MN | 5 | 0 | 0 | 2.75″ |
| IL | 2 | 1 | 1 | 3.00″ |
| OH | 2 | 1 | 0 | 1.75″ |
| PA | 1 | 1 | 0 | 0.75″ |
| NE | 1 | 0 | 0 | 0.75″ |
| NY | 0 | 0 | 1 | – |
| LA | 0 | 1 | 0 | – |
| KS | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Murphysboro, IL | 7,044 | 3.00″ |
| Carbondale, IL | 22,223 | 2.75″ |
| Detroit Lakes, MN | 10,033 | 1.75″ |
| Economy, PA | 8,990 | 0.75″ |
| Baden, PA | 3,813 | 0.75″ |
Hail reports (11)
| Time (UTC) | Size | Location |
|---|---|---|
| 19:00 | 3.00″ | Jackson County, IL |
| 14:45 | 2.75″ | Clearwater County, MN |
| 19:50 | 2.75″ | Jackson County, IL |
| 13:45 | 1.75″ | Becker County, MN |
| 13:45 | 1.75″ | Becker County, MN |
| 23:45 | 1.75″ | Sandusky County, OH |
| 13:45 | 1.00″ | Mahnomen County, MN |
| 02:30 | 1.00″ | St. Louis County, MN |
| 20:45 | 0.75″ | Sandusky County, OH |
| 00:40 | 0.75″ | Arthur County, NE |
| 00:56 | 0.75″ | Beaver County, PA |
Damage, injuries and deaths
National Weather Service offices recorded about $25,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (18 events in 8 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 |
|---|---|---|---|---|
| Jackson County, IL | 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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