On the map: every storm report logged this day.
On the map
Storm reports for August 21, 2002
On August 21, 2002, 42 hail, 71 damaging-wind and 3 tornado reports were logged across 12 states.
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← Aug 20, 2002 All 2002 storm days · August 2002 Aug 22, 2002 →
On August 21, 2002, 42 hail, 71 damaging-wind and 3 tornado reports were logged across 12 states. The largest hail reported was 1.75″ (golf ball size) in Big Horn County, WY.
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 |
|---|---|---|---|---|
| WI | 1 | 35 | 1 | 0.75″ |
| SD | 17 | 7 | 0 | 1.75″ |
| NE | 8 | 8 | 0 | 1.00″ |
| WY | 9 | 0 | 0 | 1.75″ |
| MT | 7 | 1 | 0 | 1.75″ |
| IA | 0 | 4 | 2 | – |
| IL | 0 | 6 | 0 | – |
| TX | 0 | 3 | 0 | – |
| LA | 0 | 3 | 0 | – |
| ND | 0 | 2 | 0 | – |
| MI | 0 | 1 | 0 | – |
| SC | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Winner, SD | 2,962 | 1.00″ |
| Lincoln, NE | 300,619 | 0.88″ |
| Dillon, MT | 4,242 | 0.88″ |
| Bellevue, NE | 64,777 | 0.75″ |
| Sheridan, WY | 19,813 | 0.75″ |
| Miles City, MT | 8,407 | 0.75″ |
| Deer Lodge, MT | 3,006 | 0.75″ |
Hail reports (42)
| Time (UTC) | Size | Location |
|---|---|---|
| 21:50 | 1.75″ | Big Horn County, WY |
| 22:05 | 1.75″ | Big Horn County, WY |
| 22:45 | 1.75″ | Lyman County, SD |
| 22:50 | 1.75″ | Lyman County, SD |
| 00:15 | 1.75″ | Gregory County, SD |
| 00:50 | 1.75″ | Perkins County, SD |
| 01:50 | 1.75″ | Broadwater County, MT |
| 07:27 | 1.75″ | Todd County, SD |
| 04:15 | 1.50″ | Oglala Lakota County, SD |
| 21:50 | 1.00″ | Mellette County, SD |
| 23:25 | 1.00″ | Tripp County, SD |
| 02:00 | 1.00″ | Lancaster County, NE |
| 05:45 | 1.00″ | Oglala Lakota County, SD |
| 06:55 | 1.00″ | Kearney County, NE |
| 23:15 | 0.88″ | Tripp County, SD |
| 23:35 | 0.88″ | Beaverhead County, MT |
| 23:45 | 0.88″ | Natrona County, WY |
| 00:10 | 0.88″ | Natrona County, WY |
| 00:54 | 0.88″ | Sheridan County, WY |
| 02:45 | 0.88″ | Lancaster County, NE |
| 03:28 | 0.88″ | Broadwater County, MT |
| 04:15 | 0.88″ | Lancaster County, NE |
| 06:03 | 0.88″ | Davison County, SD |
| 11:10 | 0.88″ | Yankton County, SD |
| 16:05 | 0.75″ | Custer County, MT |
| 20:45 | 0.75″ | Deer Lodge County, MT |
| 21:30 | 0.75″ | Powell County, MT |
| 21:43 | 0.75″ | Big Horn County, WY |
| 22:10 | 0.75″ | Ravalli County, MT |
| 22:50 | 0.75″ | Winnebago County, WI |
| 23:45 | 0.75″ | Sheridan County, WY |
| 00:04 | 0.75″ | Sheridan County, WY |
| 01:18 | 0.75″ | Sheridan County, WY |
| 01:45 | 0.75″ | Clay County, NE |
| 02:41 | 0.75″ | Saunders County, NE |
| 03:45 | 0.75″ | Lancaster County, NE |
| 04:12 | 0.75″ | Sarpy County, NE |
| 06:12 | 0.75″ | Davison County, SD |
| 08:52 | 0.75″ | Douglas County, SD |
| 09:15 | 0.75″ | Hutchinson County, SD |
| 10:00 | 0.75″ | Hutchinson County, SD |
| 11:11 | 0.75″ | Yankton County, SD |
Damage, injuries and deaths
National Weather Service offices recorded about $8.7 million in property damage, $13,000 in crop damage and 2 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (117 events in 12 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Muskegon County, MI | 1 | 2 | 0 | $10,000 |
| Milwaukee County, WI | 3 | 0 | 0 | $5.3 million |
| Waukesha County, WI | 1 | 0 | 0 | $2 million |
| Racine County, WI | 1 | 0 | 0 | $1 million |
| Lafayette County, WI | 1 | 0 | 0 | $110,000 |
| Clay County, NE | 2 | 0 | 0 | $100,000 |
| Fond du Lac County, WI | 1 | 0 | 0 | $100,000 |
| Dawson County, TX | 1 | 0 | 0 | $50,000 |
| Green County, WI | 1 | 0 | 0 | $25,000 |
| Iowa County, WI | 1 | 0 | 0 | $25,000 |
| Dickens County, TX | 1 | 0 | 0 | $15,000 |
| Sauk County, WI | 1 | 0 | 0 | $5,000 |
What the National Weather Service wrote
- Muskegon County, MI (near Norton Shrs) · Thunderstorm wind 61 mph · $10,000 · 2 injuries
“An isolated severe thunderstorm blew down a tree in Norton Shores. The tree fell down on and injured two people who were taking a walk through woods near Lake Michigan. Law enforcement in Fruitport reported that several tree limbs and power lines were blown down.” - Dawson County, TX (near Welch) · Thunderstorm wind 81 mph · $50,000
“An intense microburst with winds of 80 MPH affected the town of Welch resulting in damage. Farm equipment was destroyed. Lights at the football stadium were also blown down. There were no reports of significant structural damage or injuries, however, minor roof damage occurred.” - Dickens County, TX (near Spur) · Thunderstorm wind · $15,000
“Thunderstorm winds blew power lines down and the roof off of a house in Spur.” - Todd County, SD (near Mission) · Thunderstorm wind 71 mph · $3,000
“Thunderstorm winds destroyed a machine shed and blew an eight foot diameter watering tank one-quarter mile.” - Madison County, MT (near Sheridan) · Thunderstorm wind 75 mph
“A severe thunderstorm produced severe winds, damaging several homes and trailers.” - Jo Daviess County, IL (near Countywide) · Thunderstorm wind 70 mph
“Numerous trees and power lines blown down throughout the county. Hardest hit was an area from Chetlain Lane to the Belle Aire Guest House west of Galena, including the Victorian Pines, Country Inns and Suites, Palace Campground and Triangle Motel, which according to some, resembled a war zone.”
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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