On the map: every storm report logged this day.
On the map
Storm reports for July 21, 1970
On July 21, 1970, 5 hail, 3 damaging-wind and 1 tornado reports were logged across 6 states.
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On July 21, 1970, 5 hail, 3 damaging-wind and 1 tornado reports were logged across 6 states. The largest hail reported was 2.00″ (hen egg size) in Twin Falls County, ID.
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 |
|---|---|---|---|---|
| MT | 2 | 1 | 0 | 0.75″ |
| ID | 2 | 0 | 0 | 2.00″ |
| AZ | 1 | 0 | 0 | 1.00″ |
| TX | 0 | 0 | 1 | – |
| WY | 0 | 1 | 0 | – |
| NC | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Twin Falls, ID | 55,589 | 2.00″ |
| Rupert, ID | 6,343 | 1.00″ |
| Heyburn, ID | 3,744 | 1.00″ |
| Billings, MT | 121,483 | 0.75″ |
Hail reports (5)
| Time (UTC) | Size | Location |
|---|---|---|
| 23:00 | 2.00″ | Twin Falls County, ID |
| 20:40 | 1.00″ | Yavapai County, AZ |
| 23:55 | 1.00″ | Cassia County, ID |
| 20:50 | 0.75″ | Park County, MT |
| 21:00 | 0.75″ | Yellowstone County, MT |
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 6 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 |
|---|---|---|---|---|
| Galveston County, TX | 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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