Storm reports for August 20, 2003

IndependentNot affiliated with NOAA or the National Weather Service. Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology

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Other storms on August 20 →

On August 20, 2003, 36 hail, 99 damaging-wind and 1 tornado reports were logged across 15 states. The largest hail reported was 1.75″ (golf ball size) in Scott County, IA.

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

Cities with hail reported within 5 miles

Hail reports (36)

Damage, injuries and deaths

National Weather Service offices recorded about $662,000 in property damage and $85,000 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (137 events in 15 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Scott County, IA (near Davenport Arpt) · Thunderstorm wind 92 mph · $55,000
  “Winds of 50 knots began at 1758 CST according to DVN ASOS. At 1800 CST measured gusts of 58 knots (67 mph) were recorded and at 1801 CST, DVN ASOS measured a gust of 67 knots (77 mph). Before the ASOS could update for 1802 CST a power failure occurred at the ASOS site.”
• Jones County, IA (near Wyoming) · Thunderstorm wind 70 mph · $50,000
  “Numerous trees down on houses & vehicles. Small Outbuilding blown over.”
• Waseca County, MN (near Janesville) · Thunderstorm wind 69 mph · $50,000
  “Roof partially blown off home. Barn blown down. Numerous trees and large branches down.”
• Okeechobee County, FL (near Okeechobee) · Thunderstorm wind 58 mph · $40,000
  “Thunderstorm winds damaged the roof and windows of a house northwest of Okeechobee.”
• Keokuk County, IA (near Hayesville) · Thunderstorm wind 81 mph · $30,000
  “Also 1 West of Hayesville; heavy damage to a grain silo with power poles snapped in half.”
• Copiah County, MS (near Hazlehurst) · Thunderstorm wind 67 mph · $20,000
  “Numerous trees and powerlines were blown down. A few trees fell on houses.”

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