On the map: every storm report logged this day.
On the map
Storm reports for August 2, 2001
On August 2, 2001, 13 hail, 35 damaging-wind and 3 tornado reports were logged across 9 states.
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On August 2, 2001, 13 hail, 35 damaging-wind and 3 tornado reports were logged across 9 states. The largest hail reported was 1.75″ (golf ball size) in Union 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 |
|---|---|---|---|---|
| IA | 5 | 16 | 0 | 1.75″ |
| IL | 1 | 12 | 0 | 0.88″ |
| CO | 4 | 0 | 2 | 1.75″ |
| SD | 3 | 2 | 0 | 1.75″ |
| MO | 0 | 2 | 0 | – |
| FL | 0 | 0 | 1 | – |
| TN | 0 | 1 | 0 | – |
| OH | 0 | 1 | 0 | – |
| AZ | 0 | 1 | 0 | – |
Cities with hail reported within 5 miles
| City | Population | Largest report |
|---|---|---|
| Sioux City, IA | 86,875 | 1.75″ |
| South Sioux City, NE | 13,910 | 1.75″ |
| North Sioux City, SD | 3,059 | 1.75″ |
Hail reports (13)
| Time (UTC) | Size | Location |
|---|---|---|
| 12:45 | 1.75″ | Union County, SD |
| 12:50 | 1.75″ | Woodbury County, IA |
| 21:30 | 1.75″ | Adams County, CO |
| 12:40 | 1.25″ | Union County, SD |
| 12:42 | 1.25″ | Union County, SD |
| 13:41 | 1.00″ | Cherokee County, IA |
| 22:37 | 1.00″ | Weld County, CO |
| 22:45 | 1.00″ | Weld County, CO |
| 12:50 | 0.88″ | Woodbury County, IA |
| 17:32 | 0.88″ | Marshall County, IA |
| 21:32 | 0.88″ | Henry County, IL |
| 12:45 | 0.75″ | Plymouth County, IA |
| 22:35 | 0.75″ | Weld County, CO |
Damage, injuries and deaths
National Weather Service offices recorded about $5.3 million in property damage, $86,000 in crop damage and 3 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (51 events in 9 states). Injuries and deaths are those the events caused directly.
| County | Events | Injuries | Deaths | Property damage |
|---|---|---|---|---|
| Scott County, IA | 1 | 2 | 0 | – |
| Plymouth County, IA | 2 | 1 | 0 | $70,000 |
| Woodbury County, IA | 1 | 0 | 0 | $5 million |
| Union County, SD | 1 | 0 | 0 | $200,000 |
| St. Lucie County, FL | 1 | 0 | 0 | $10,000 |
| Sac County, IA | 2 | 0 | 0 | $10,000 |
| Pocahontas County, IA | 1 | 0 | 0 | $5,000 |
| Pinal County, AZ | 1 | 0 | 0 | $2,000 |
| Calhoun County, IA | 1 | 0 | 0 | $2,000 |
| Marshall County, IA | 1 | 0 | 0 | $1,000 |
What the National Weather Service wrote
- Scott County, IA (near Buffalo) · Thunderstorm wind 70 mph · 2 injuries
“Law enforcement officials said winds estimated at 70 mph were the likely cause of an accident that injured two people (directly-related). Thunderstorm winds blew a car off a rural road into a parked pickup truck.” - Plymouth County, IA (near James) · Thunderstorm wind 70 mph · $50,000 · 1 injury
“Thunderstorm winds caused tree damage. A large tree was blown onto a car, causing a minor injury to the occupant.” - Woodbury County, IA (near Sioux City) · Thunderstorm wind 98 mph · $5 million
“Downburst thunderstorm winds caused extensive tree damage in Sioux City. Large trees were uprooted, snapped, and stripped. A few vehicles were completely destroyed by the falling trees. Houses and other buildings, including a nursing home, were also damaged by trees and debris.” - Union County, SD (near North Sioux City) · Thunderstorm wind 70 mph · $200,000
“Thunderstorm winds caused widespread damage to trees, power poles, and lines, resulting in power outages affecting most of North Sioux City. Some large trees were sheared from their trunks. Tree debris damaged vehicles, homes, garages, and sheds.” - Plymouth County, IA (near Hinton) · Thunderstorm wind 66 mph · $20,000
“Thunderstorm winds caused tree damage. A large tree was blown onto a house, damaging the house.” - St. Lucie County, FL (near Ft Pierce) · Tornado F0 · $10,000
“An F0 tornado touched down briefly in a rural area west of Ft. Pierce. The tornado damaged a mobile home, overturned a farm tractor and blew down about 25 citrus trees.”
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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