On the map: every storm report logged this day.
On the map
Storm reports for August 21, 1998
On August 21, 1998, 10 hail, 7 damaging-wind and 2 tornado reports were logged across 6 states.
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← Aug 20, 1998 All 1998 storm days · August 1998 Aug 22, 1998 →
On August 21, 1998, 10 hail, 7 damaging-wind and 2 tornado reports were logged across 6 states. The largest hail reported was 1.75″ (golf ball size) in Pondera County, MT.
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 | 5 | 1 | 0 | 1.75″ |
| ND | 5 | 0 | 0 | 1.75″ |
| TX | 0 | 3 | 1 | – |
| WY | 0 | 1 | 1 | – |
| AZ | 0 | 1 | 0 | – |
| ID | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Missoula, MT | 78,204 | 0.75″ |
Hail reports (10)
| Time (UTC) | Size | Location |
|---|---|---|
| 23:30 | 1.75″ | Pondera County, MT |
| 00:23 | 1.75″ | Hettinger County, ND |
| 02:18 | 1.75″ | Grant County, ND |
| 02:38 | 1.75″ | Morton County, ND |
| 00:21 | 1.00″ | Sheridan County, MT |
| 01:30 | 1.00″ | Stark County, ND |
| 00:30 | 0.75″ | Hettinger County, ND |
| 01:03 | 0.75″ | Sheridan County, MT |
| 07:15 | 0.75″ | McCone County, MT |
| 07:40 | 0.75″ | Missoula County, MT |
Damage, injuries and deaths
National Weather Service offices recorded about $59,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (21 events in 6 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Hardin County, TX | 1 | 0 | 0 | $25,000 |
| Galveston County, TX | 1 | 0 | 0 | $20,000 |
| Pima County, AZ | 1 | 0 | 0 | $10,000 |
| Goshen County, WY | 1 | 0 | 0 | $4,000 |
What the National Weather Service wrote
- Galveston County, TX (near League City) · Tornado F0 · $20,000
“Tornado downed trees and tore bricks off a house. Damage to roof and vehicle as well.” - Pima County, AZ (near Green Vly) · Thunderstorm wind 64 mph · $10,000
“Thunderstorm winds estimated at 60-70 mph by fire department personnel blew down several trees, one of which was about 60 feet tall. One of the trees blew onto the patio of a house damaging the patio roof and wall.” - Goshen County, WY (near Torrington) · Thunderstorm wind 71 mph · $4,000
“A storm produced a wind gust of 70 mph which ripped the roof off of a shop building 14 miles southwest of Torrington.” - Refugio County, TX (near Refugio) · Thunderstorm wind 58 mph
“Several large trees downed by thunderstorm wind.” - Morton County, ND (near New Salem) · Hail 1.75″
“minor damage to homes and crops 6.5 inches rain” - Grant County, ND (near Elgin) · Hail 1.75″
“hail reported over heart butte dam 14 s glen ullin”
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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