On the map: every storm report logged this day.
On the map
Storm reports for August 31, 2002
On August 31, 2002, 63 hail, 26 damaging-wind and 0 tornado reports were logged across 7 states.
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← Aug 30, 2002 All 2002 storm days · August 2002 Sep 1, 2002 →
On August 31, 2002, 63 hail, 26 damaging-wind and 0 tornado reports were logged across 7 states. The largest hail reported was 3.00″ (teacup size) in Cavalier 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 | 39 | 8 | 0 | 3.00″ |
| MN | 3 | 11 | 0 | 1.00″ |
| CO | 9 | 3 | 0 | 1.00″ |
| SD | 8 | 1 | 0 | 1.25″ |
| MT | 0 | 3 | 0 | – |
| NM | 2 | 0 | 0 | 2.75″ |
| NE | 2 | 0 | 0 | 1.00″ |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Bismarck, ND | 77,772 | 2.50″ |
| Valley City, ND | 6,580 | 2.50″ |
| Lincoln, ND | 4,502 | 2.50″ |
| Fargo, ND | 136,285 | 1.00″ |
| Moorhead, MN | 45,726 | 1.00″ |
| Mandan, ND | 24,788 | 1.00″ |
| Dilworth, MN | 4,811 | 1.00″ |
| Devils Lake, ND | 7,314 | 0.88″ |
| Jamestown, ND | 15,789 | 0.75″ |
Hail reports (63)
| Time (UTC) | Size | Location |
|---|---|---|
| 00:00 | 3.00″ | Cavalier County, ND |
| 02:10 | 2.75″ | Union County, NM |
| 02:43 | 2.75″ | Cavalier County, ND |
| 00:53 | 2.50″ | Burleigh County, ND |
| 03:38 | 2.50″ | Barnes County, ND |
| 23:42 | 2.00″ | Burleigh County, ND |
| 00:00 | 2.00″ | Cavalier County, ND |
| 22:45 | 1.75″ | Rolette County, ND |
| 00:05 | 1.75″ | Cavalier County, ND |
| 00:48 | 1.75″ | Cavalier County, ND |
| 02:26 | 1.75″ | Sioux County, ND |
| 02:35 | 1.75″ | Benson County, ND |
| 02:45 | 1.75″ | Benson County, ND |
| 05:05 | 1.75″ | Dickey County, ND |
| 23:49 | 1.50″ | Burleigh County, ND |
| 01:00 | 1.25″ | Cavalier County, ND |
| 02:16 | 1.25″ | Potter County, SD |
| 23:27 | 1.00″ | Morton County, ND |
| 23:40 | 1.00″ | Towner County, ND |
| 00:43 | 1.00″ | Cavalier County, ND |
| 00:45 | 1.00″ | Yuma County, CO |
| 00:52 | 1.00″ | Burleigh County, ND |
| 01:35 | 1.00″ | Yuma County, CO |
| 01:40 | 1.00″ | Potter County, SD |
| 01:52 | 1.00″ | Yuma County, CO |
| 02:03 | 1.00″ | Yuma County, CO |
| 02:20 | 1.00″ | Towner County, ND |
| 02:25 | 1.00″ | Cavalier County, ND |
| 02:30 | 1.00″ | Slope County, ND |
| 02:34 | 1.00″ | Pembina County, ND |
| 02:45 | 1.00″ | Grant County, NE |
| 03:37 | 1.00″ | Pembina County, ND |
| 04:53 | 1.00″ | Clay County, MN |
| 23:39 | 0.88″ | Yuma County, CO |
| 00:15 | 0.88″ | Cavalier County, ND |
| 00:35 | 0.88″ | Yuma County, CO |
| 00:48 | 0.88″ | Morton County, ND |
| 01:43 | 0.88″ | Cavalier County, ND |
| 02:50 | 0.88″ | Towner County, ND |
| 02:55 | 0.88″ | Ramsey County, ND |
| 03:35 | 0.88″ | Cavalier County, ND |
| 12:45 | 0.75″ | Beltrami County, MN |
| 23:00 | 0.75″ | Yuma County, CO |
| 23:15 | 0.75″ | Yuma County, CO |
| 23:40 | 0.75″ | Morrill County, NE |
| 23:55 | 0.75″ | Morton County, ND |
| 00:00 | 0.75″ | Hyde County, SD |
| 01:03 | 0.75″ | Pembina County, ND |
| 01:30 | 0.75″ | Burleigh County, ND |
| 01:35 | 0.75″ | Potter County, SD |
| 01:40 | 0.75″ | Burleigh County, ND |
| 02:05 | 0.75″ | Kittson County, MN |
| 02:05 | 0.75″ | Faulk County, SD |
| 02:30 | 0.75″ | Faulk County, SD |
| 02:51 | 0.75″ | Edmunds County, SD |
| 02:55 | 0.75″ | Stutsman County, ND |
| 03:03 | 0.75″ | Stutsman County, ND |
| 03:03 | 0.75″ | Union County, NM |
| 03:12 | 0.75″ | Yuma County, CO |
| 03:45 | 0.75″ | McPherson County, SD |
| 04:00 | 0.75″ | Cavalier County, ND |
| 04:45 | 0.75″ | Cass County, ND |
| 07:00 | 0.75″ | Richland County, ND |
Damage, injuries and deaths
National Weather Service offices recorded about $137,000 in property damage and $3,000 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (89 events in 7 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Roseau County, MN | 2 | 0 | 0 | $65,000 |
| Otter Tail County, MN | 1 | 0 | 0 | $20,000 |
| Pennington County, MN | 1 | 0 | 0 | $20,000 |
| Cavalier County, ND | 1 | 0 | 0 | $10,000 |
| Yuma County, CO | 1 | 0 | 0 | $5,000 |
| Beltrami County, MN | 1 | 0 | 0 | $5,000 |
| Lake of the Woods County, MN | 1 | 0 | 0 | $5,000 |
| Grant County, NE | 1 | 0 | 0 | $3,000 |
| Grand Forks County, ND | 1 | 0 | 0 | $2,000 |
| Marshall County, MN | 1 | 0 | 0 | $1,000 |
| Griggs County, ND | 1 | 0 | 0 | $1,000 |
| Barnes County, ND | 1 | 0 | 0 | $0 |
What the National Weather Service wrote
- Roseau County, MN (near Roseau) · Thunderstorm wind · $50,000
“Two FEMA trailers and one semi truck were blown over. 1000 feet of electrical wiring needed replacement in the downtown area.” - Pennington County, MN (near Thief River Falls) · Thunderstorm wind · $20,000
“Large cottonwood trees were uprooted and a grain bin was demolished.” - Otter Tail County, MN (near New York Mills Arpt) · Thunderstorm wind · $20,000
“Strong winds destroyed a hangar, damaged an airplane and boat inside, and knocked out power to the airport. The airport beacon and beacon tower were also knocked over.” - Roseau County, MN (near Roseau) · Thunderstorm wind · $15,000
“Trees and powerlines were blown down, boats and trailers were flipped over, and fences were pushed over by the strong wind.” - Cavalier County, ND (near Milton) · Thunderstorm wind · $10,000
“Many trees were blown down which knocked out power.” - Beltrami County, MN (near Fourtown) · Thunderstorm wind · $5,000
“Numerous large trees were snapped off or uprooted in the Beltrami Island State Forest.”
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.
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