On the map: every storm report logged this day.
On the map
Storm reports for August 18, 1978
On August 18, 1978, 5 hail, 19 damaging-wind and 1 tornado reports were logged across 7 states.
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On August 18, 1978, 5 hail, 19 damaging-wind and 1 tornado reports were logged across 7 states. The largest hail reported was 2.50″ (tennis ball size) in Crawford County, WI.
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 |
|---|---|---|---|---|
| MI | 2 | 7 | 1 | 1.75″ |
| WI | 3 | 2 | 0 | 2.50″ |
| IL | 0 | 5 | 0 | – |
| IA | 0 | 2 | 0 | – |
| FL | 0 | 1 | 0 | – |
| OK | 0 | 1 | 0 | – |
| GA | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Prairie du Chien, WI | 5,472 | 2.50″ |
| Houghton, MI | 8,543 | 1.75″ |
| Hancock, MI | 4,620 | 1.75″ |
| Boscobel, WI | 3,265 | 1.00″ |
Hail reports (5)
| Time (UTC) | Size | Location |
|---|---|---|
| 23:30 | 2.50″ | Crawford County, WI |
| 09:30 | 1.75″ | Houghton County, MI |
| 23:45 | 1.00″ | Grant County, WI |
| 14:30 | 0.75″ | Osceola County, MI |
| 19:15 | 0.75″ | Shawano County, WI |
Damage, injuries and deaths
National Weather Service offices recorded about $250,000 in property damage and 8 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (25 events in 7 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 |
|---|---|---|---|---|
| Shiawassee County, MI | 1 | 8 | 0 | $250,000 |
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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