On the map: every storm report logged this day.
On the map
Storm reports for July 21, 1987
On July 21, 1987, 29 hail, 25 damaging-wind and 19 tornado reports were logged across 14 states.
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On July 21, 1987, 29 hail, 25 damaging-wind and 19 tornado reports were logged across 14 states. The largest hail reported was 2.75″ (baseball size) in Traill 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 | 12 | 6 | 12 | 2.75″ |
| UT | 10 | 3 | 0 | 2.00″ |
| MN | 3 | 5 | 1 | 0.75″ |
| WY | 2 | 3 | 2 | 1.25″ |
| ID | 0 | 2 | 1 | – |
| DE | 0 | 2 | 0 | – |
| IA | 0 | 2 | 0 | – |
| CA | 1 | 0 | 0 | 0.75″ |
| OR | 1 | 0 | 0 | 0.75″ |
| NJ | 0 | 0 | 1 | – |
| VA | 0 | 0 | 1 | – |
| WI | 0 | 0 | 1 | – |
| SD | 0 | 1 | 0 | – |
| PA | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Spanish Fork, UT | 47,809 | 2.00″ |
| Springville, UT | 36,027 | 2.00″ |
| Mapleton, UT | 14,812 | 2.00″ |
| Provo, UT | 115,479 | 1.75″ |
| Orem, UT | 96,646 | 1.75″ |
| Gunnison, UT | 3,617 | 1.75″ |
| Salt Lake City, UT | 217,783 | 1.00″ |
| Taylorsville, UT | 57,819 | 1.00″ |
| South Salt Lake, UT | 26,561 | 1.00″ |
Hail reports (29)
| Time (UTC) | Size | Location |
|---|---|---|
| 22:30 | 2.75″ | Traill County, ND |
| 00:30 | 2.50″ | Traill County, ND |
| 19:40 | 2.00″ | Utah County, UT |
| 22:02 | 2.00″ | Steele County, ND |
| 19:20 | 1.75″ | Utah County, UT |
| 19:20 | 1.75″ | Burleigh County, ND |
| 19:39 | 1.75″ | Sheridan County, ND |
| 20:00 | 1.75″ | Wells County, ND |
| 21:30 | 1.75″ | Sanpete County, UT |
| 22:05 | 1.75″ | Griggs County, ND |
| 23:15 | 1.75″ | Steele County, ND |
| 23:20 | 1.75″ | Barnes County, ND |
| 00:05 | 1.75″ | Steele County, ND |
| 06:00 | 1.75″ | Traill County, ND |
| 19:30 | 1.50″ | Summit County, UT |
| 19:30 | 1.25″ | Rich County, UT |
| 20:25 | 1.25″ | Teton County, WY |
| 18:45 | 1.00″ | Salt Lake County, UT |
| 20:30 | 1.00″ | Summit County, UT |
| 21:00 | 1.00″ | Wasatch County, UT |
| 21:15 | 1.00″ | Utah County, UT |
| 05:30 | 1.00″ | Sanpete County, UT |
| 21:20 | 0.75″ | Griggs County, ND |
| 22:15 | 0.75″ | Trinity County, CA |
| 01:00 | 0.75″ | Wasco County, OR |
| 01:15 | 0.75″ | Sweetwater County, WY |
| 01:30 | 0.75″ | Polk County, MN |
| 04:35 | 0.75″ | Norman County, MN |
| 05:02 | 0.75″ | Norman County, MN |
Damage, injuries and deaths
National Weather Service offices recorded about $6.6 million in property damage and 11 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (73 events in 14 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 |
|---|---|---|---|---|
| Utah County, UT | 1 | 8 | 0 | – |
| Atlantic County, NJ | 1 | 3 | 0 | $3,000 |
| Prince William County, VA | 1 | 0 | 0 | $2.5 million |
| Teton County, WY | 1 | 0 | 0 | $2.5 million |
| Griggs County, ND | 2 | 0 | 0 | $500,000 |
| Steele County, ND | 2 | 0 | 0 | $500,000 |
| Foster County, ND | 1 | 0 | 0 | $250,000 |
| Nelson County, ND | 1 | 0 | 0 | $250,000 |
| Lincoln County, ID | 1 | 0 | 0 | $25,000 |
| Benson County, ND | 1 | 0 | 0 | $25,000 |
| Cass County, ND | 1 | 0 | 0 | $25,000 |
| Dodge County, WI | 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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