Storm reports for August 15, 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 August 15 →

On August 15, 2004, 42 hail, 6 damaging-wind and 3 tornado reports were logged across 8 states. The largest hail reported was 2.75″ (baseball size) in Sheridan County, NE.

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 (42)

Damage, injuries and deaths

National Weather Service offices recorded about $568,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (52 events in 8 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Todd County, SD (near St Francis) · Thunderstorm wind 70 mph · $250,000
  “A roof was completely blown off a mobile home, causing the walls to collapse. A roof on a stick-built house was partially torn off and most of the shingles were missing. The door was blown off another mobile home. 9 large power transmission poles were broken.”
• Maricopa County, AZ (near Sun Lakes) · Thunderstorm wind 92 mph · $200,000
  “Severe thunderstorms developed along the Maricopa and northwest Pinal County line, in vicinity of Sun Lakes. Damaging high winds, multiple microbursts, were primarily in the southern side of Sun Lakes, and the adjacent desert to the south of the community in Pinal County (6 N Bapchule).”
• Maricopa County, AZ (near Aguila) · Thunderstorm wind 81 mph · $60,000
  “Home heavily damaged by winds from severe thunderstorm as reported by county relief aid volunteers.”
• Box Butte County, NE (near Alliance) · Hail 2.00″ · $10,000
  “2 inch diamter hail broke windows from 3 to 7 miles northeast of Alliance, Ne.”
• Pinal County, AZ (near Bapchule) · Thunderstorm wind 92 mph
  “Severe thunderstorms developed along the Maricopa and northwest Pinal County line, in vicinity of Sun Lakes. Damaging high winds, multiple microbursts, occurred with most damage occurring on the southern side of Sun Lakes in Maricopa County.”
• Lyman County, SD (near Presho) · Thunderstorm wind 60 mph
  “High winds downed many branches and tipped over a horse trailer.”

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