On the map: every storm report logged this day.
On the map
Storm reports for August 15, 1998
On August 15, 1998, 4 hail, 5 damaging-wind and 0 tornado reports were logged across 6 states.
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On August 15, 1998, 4 hail, 5 damaging-wind and 0 tornado reports were logged across 6 states. The largest hail reported was 2.75″ (baseball size) in Dewey County, SD.
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 |
|---|---|---|---|---|
| SD | 3 | 0 | 0 | 2.75″ |
| AZ | 0 | 2 | 0 | – |
| AR | 1 | 0 | 0 | 0.75″ |
| WY | 0 | 1 | 0 | – |
| LA | 0 | 1 | 0 | – |
| MT | 0 | 1 | 0 | – |
Hail reports (4)
| Time (UTC) | Size | Location |
|---|---|---|
| 00:40 | 2.75″ | Dewey County, SD |
| 23:55 | 1.75″ | Dewey County, SD |
| 00:20 | 1.75″ | Dewey County, SD |
| 00:30 | 0.75″ | Benton County, AR |
Damage, injuries and deaths
National Weather Service offices recorded about $26,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (9 events in 5 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Pinal County, AZ | 1 | 0 | 0 | $20,000 |
| Washington Parish, LA | 1 | 0 | 0 | $5,000 |
| Carbon County, MT | 1 | 0 | 0 | $1,000 |
What the National Weather Service wrote
- Pinal County, AZ (near Coolidge) · Thunderstorm wind 63 mph · $20,000
“Several palo verde trees blown down. Some homes and businesses in Coolidge received minor damage due to the winds. One resident reported a stored row boat that blew about a quarter mile. Washes near Casa Grande, southwest of Coolidge, were reported running about 4 feet deep.” - Washington Parish, LA (near Angie) · Thunderstorm wind · $5,000
“Thunderstorm wind gusts blew down several large trees and downed one large tree onto a car.” - Carbon County, MT (near Boyd) · Thunderstorm wind · $1,000
“Two trees were downed around Boyd during a thunderstorm.” - Maricopa County, AZ (near Mesa) · Thunderstorm wind 58 mph
“About 12,000 residents were left without power as winds and lightning struck the area.”
Event narratives from NWS Storm Data, shortened. Up to six per day, chosen by deaths, injuries, damage and size.
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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