Storm reports for April 20, 2004

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 April 20 →

On April 20, 2004, 80 hail, 17 damaging-wind and 32 tornado reports were logged across 11 states. The largest hail reported was 4.25″ (grapefruit size) in Creek County, OK. Tornadoes killed 8.

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 (80)

Damage, injuries and deaths

National Weather Service offices recorded about $19.4 million in property damage, 21 injuries and 8 deaths from hail, thunderstorm wind and tornadoes across the US on this storm day (135 events in 11 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• LaSalle County, IL (near Peru) · Tornado F3 · 8 deaths · 7 injuries
  “The tornado entered LaSalle County from Putnam County, approximately 3 miles northeast of the town of Standard, producing F0 intensity damage in a wooded area southwest of Peru.”
• Boone County, IN (near Jamestown) · Tornado F1 · $1.6 million · 8 injuries
  “A tornado associated with a low-topped supercell touched down a quarter of a mile south of the Boone/Hendricks county line in Hendricks county. The tornado continued northeast through Jamestown and into Boone county causing significant damage to a dozen homes.”
• Howard County, IN (near Kokomo) · Tornado F1 · $3 million · 1 injury
  “A third in a string of tornadoes associated with an isolated low-topped supercell touched down in Kokomo. The tornado was rated an F1 and severely damaged a skating rink and trucking company. There was also damage to 3 other homes and 1 minor injury reported.”
• Will County, IL (near Joliet) · Tornado F1 · $5 million
  “The tornado swept out a path through a mainly residential section on the near west side of Joliet known as the "Cathedral Area". Initial damage was found near the intersection of Jefferson St. (U.S. route 52) and William Street.”
• Howard County, IN (near Kokomo) · Tornado F0 · $500,000
  “The second in a series of tornadoes associated with an isolated low-topped supercell touched down in rural Howard county 8 miles southwest of Kokomo. The tornado was rated an F0 and destroyed a barn and overturned a grain bin in its brief lifetime.”
• Marshall County, IL (near Camp Grove) · Tornado F1 · $250,000
  “The tornado crossed from Stark County into Marshall County four tenths of a mile northwest of Camp Grove. It initially blew down numerous trees and power lines until it reached the intersection of 1300N and 250E where it destroyed a shed and a pole barn which had farm equipment in it.”

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