On the map: every storm report logged this day.
On the map
Storm reports for June 20, 1966
On June 20, 1966, 4 hail, 3 damaging-wind and 2 tornado reports were logged across 5 states.
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On June 20, 1966, 4 hail, 3 damaging-wind and 2 tornado reports were logged across 5 states. The largest hail reported was 2.50″ (tennis ball size) in Mountrail County, ND.
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 |
|---|---|---|---|---|
| ND | 1 | 2 | 1 | 2.50″ |
| MN | 2 | 0 | 0 | 1.75″ |
| SD | 1 | 0 | 0 | 0.75″ |
| TX | 0 | 0 | 1 | – |
| NE | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Winona, MN | 26,173 | 1.75″ |
Hail reports (4)
| Time (UTC) | Size | Location |
|---|---|---|
| 01:00 | 2.50″ | Mountrail County, ND |
| 05:00 | 1.75″ | Winona County, MN |
| 23:10 | 1.25″ | Fillmore County, MN |
| 20:50 | 0.75″ | Pennington County, SD |
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 (9 events in 5 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 |
|---|---|---|---|---|
| Williams County, ND | 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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