Storm reports for July 21, 2004

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

← Jul 20, 2004 All 2004 storm days · July 2004 Jul 22, 2004 →

Other storms on July 21 →

On July 21, 2004, 38 hail, 96 damaging-wind and 2 tornado reports were logged across 14 states. The largest hail reported was 1.75″ (golf ball size) in Wilkin County, MN.

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 (38)

Damage, injuries and deaths

National Weather Service offices recorded about $421,000 in property damage and $15,000 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (136 events in 14 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Yankton County, SD (near Yankton) · Thunderstorm wind 90 mph · $200,000
  “Thunderstorm winds blew down power poles and lines and significantly damaged at least 6 houses. Some of the houses had holes blown in the walls from the flying debris. Significant tree damage also occurred with 10 to 20 trees uprooted.”
• Roseau County, MN (near Fox) · Thunderstorm wind 92 mph · $20,000
  “A 30x60 foot storage shed was blown off its foundation and destroyed. Several trees, greater than 6 inches in diameter, were uprooted.”
• Kent County, MI (near Byron Center) · Thunderstorm wind 61 mph · $20,000
  “Several trees were blown down across Kent county.”
• Montcalm County, MI (near Gowen) · Thunderstorm wind 61 mph · $20,000
  “Numerous trees were blown down in and near Gowen.”
• LaGrange County, IN (near Lagrange) · Thunderstorm wind 75 mph · $15,000
  “Several large trees were knocked down around Oliver Lake. An 18 inch diameter apple tree was uprooted on the west side of the lake. An 20 inch diameter tree was knocked down onto a pontoon and lift and a 31 inch diameter tree was snapped at the base, with an aluminum flag pole being snapped off.”
• Keith County, NE (near Lemoyne) · Thunderstorm wind 70 mph · $10,000
  “The strong winds caused an empty train to derail, broke off a radio antenna, and snapped off several large tree limbs.”

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