On the map: every storm report logged this day.
On the map
Storm reports for August 18, 1983
On August 18, 1983, 4 hail, 31 damaging-wind and 10 tornado reports were logged across 11 states.
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On August 18, 1983, 4 hail, 31 damaging-wind and 10 tornado reports were logged across 11 states. The largest hail reported was 2.00″ (hen egg size) in Boulder County, CO.
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 |
|---|---|---|---|---|
| TX | 0 | 9 | 8 | – |
| CO | 3 | 6 | 0 | 2.00″ |
| ND | 0 | 6 | 0 | – |
| SD | 0 | 5 | 0 | – |
| MN | 0 | 2 | 0 | – |
| IL | 1 | 0 | 0 | 1.00″ |
| ID | 0 | 0 | 1 | – |
| WY | 0 | 0 | 1 | – |
| MI | 0 | 1 | 0 | – |
| IA | 0 | 1 | 0 | – |
| GA | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Westminster, CO | 115,302 | 2.00″ |
| Broomfield, CO | 78,323 | 2.00″ |
| Northglenn, CO | 38,287 | 2.00″ |
| Federal Heights, CO | 13,971 | 2.00″ |
| Superior, CO | 13,654 | 2.00″ |
| Thornton, CO | 146,689 | 1.75″ |
Hail reports (4)
| Time (UTC) | Size | Location |
|---|---|---|
| 23:00 | 2.00″ | Boulder County, CO |
| 00:30 | 1.75″ | Adams County, CO |
| 20:55 | 1.00″ | Peoria County, IL |
| 22:45 | 1.00″ | Boulder County, CO |
Damage, injuries and deaths
National Weather Service offices recorded about $2.5 million in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (45 events in 11 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 |
|---|---|---|---|---|
| Navarro County, TX | 1 | 0 | 0 | $2.5 million |
| Harris County, TX | 3 | 0 | 0 | $0 |
| Brazoria County, TX | 2 | 0 | 0 | $0 |
| Bannock County, ID | 1 | 0 | 0 | $0 |
| Montgomery County, TX | 1 | 0 | 0 | $0 |
| Wharton County, TX | 1 | 0 | 0 | $0 |
| Albany County, WY | 1 | 0 | 0 | $0 |
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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