On the map: every storm report logged this day.
On the map
Storm reports for August 27, 1964
On August 27, 1964, 1 hail, 5 damaging-wind and 12 tornado reports were logged across 10 states.
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On August 27, 1964, 1 hail, 5 damaging-wind and 12 tornado reports were logged across 10 states. The largest hail reported was 2.25″ (hen egg size) in Cass County, MN. Tornadoes killed 2.
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 |
|---|---|---|---|---|
| KS | 0 | 3 | 1 | – |
| IA | 0 | 0 | 3 | – |
| FL | 0 | 0 | 3 | – |
| MN | 1 | 0 | 1 | 2.25″ |
| AZ | 0 | 0 | 1 | – |
| WI | 0 | 0 | 1 | – |
| TX | 0 | 0 | 1 | – |
| OK | 0 | 0 | 1 | – |
| NE | 0 | 1 | 0 | – |
| MO | 0 | 1 | 0 | – |
Hail reports (1)
| Time (UTC) | Size | Location |
|---|---|---|
| 00:30 | 2.25″ | Cass County, MN |
Damage, injuries and deaths
National Weather Service offices recorded about $430,000 in property damage, 10 injuries and 2 deaths from hail, thunderstorm wind and tornadoes across the US on this storm day (18 events in 10 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 |
|---|---|---|---|---|
| Pima County, AZ | 1 | 9 | 2 | $25,000 |
| Brevard County, FL | 1 | 1 | 0 | $25,000 |
| Wabasha County, MN | 1 | 0 | 0 | $250,000 |
| Cass County, IA | 1 | 0 | 0 | $25,000 |
| Floyd County, IA | 1 | 0 | 0 | $25,000 |
| Hamilton County, IA | 1 | 0 | 0 | $25,000 |
| Mitchell County, KS | 1 | 0 | 0 | $25,000 |
| Barron County, WI | 1 | 0 | 0 | $25,000 |
| Broward County, FL | 1 | 0 | 0 | $3,000 |
| Logan County, OK | 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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