Storm reports for August 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 August 20 →

On August 20, 2004, 40 hail, 90 damaging-wind and 3 tornado reports were logged across 20 states. The largest hail reported was 2.75″ (baseball size) in Runnels County, TX.

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 (40)

Damage, injuries and deaths

National Weather Service offices recorded about $830,000 in property damage and 10 injuries from hail, thunderstorm wind and tornadoes across the US on this storm day (133 events in 20 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Beaver County, PA (near Ohioville) · Thunderstorm wind 64 mph · $50,000
  “Trees down from Hookstown to Ohioville. One house suffered a damaged roof in Hookstown. 10,000 customers lost electric power. Several microbursts hit Hanover and Greene townships, with severe damage where Rte 30 and 151 intersect. Numerous trees toppled or snapped; power lines down.”
• Broome County, NY (near Lisle) · Thunderstorm wind 75 mph · $30,000
  “Thunderstorm winds downed numerous trees and wires. Some of the trees and wires fell into the road. One tree fell on a house. The worst damage was along Kales Hill Road off State Route 26 in the Town of Triangle. On the west side of the hill numerous trees and wires fell along and onto the road.”
• Floyd County, GA (near Armuchee) · Thunderstorm wind 58 mph · $30,000
  “The Rome News-Tribune reported that thunderstorm winds blew the roof off a building at the Richard B. Russell Regional Airport, tangling it in power lines. In addition, four trees were blown down onto power lines. Up to 1000 people were without electricity during this incident.”
• Jefferson County, OH (near Toronto) · Thunderstorm wind 60 mph · $25,000
  “Numerous trees and power lines blown down. One mobile home knocked off its foundation; 5 others damaged by falling trees and wind.”
• Berkshire County, MA (near Pittsfield) · Tornado F0 · $25,000
  “Survey team observed several structures with shingle damage to roofs. Many limbs and several trees were knocked down. Upon observation these trees were determined to be shallow rooted. Roofs dislodged from clubhouse and dugout of Waconah Park baseball stadium.”
• Tuscaloosa County, AL (near Tuscaloosa) · Thunderstorm wind 58 mph · $11,000
  “A few trees were blown down across the county. One tree landed on a mobile home in Tuscaloosacausing minor damage.”

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