Storm reports for July 20, 2011

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

← Jul 19, 2011 All 2011 storm days · July 2011 Jul 21, 2011 →

Other storms on July 20 →

On July 20, 2011, 4 hail, 48 damaging-wind and 0 tornado reports were logged across 10 states. The largest hail reported was 1.00″ (quarter size) in Clermont County, OH.

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 (4)

Damage, injuries and deaths

National Weather Service offices recorded about $1.8 million in property damage and $1.4 million in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (52 events in 10 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Roseau County, MN (near Greenbush) · Thunderstorm wind 90 mph · $700,000
  “Numerous large tree limbs were broken down around Greenbush. Trees were blown down on cars and roofs of homes. Power lines were also downed. Large commercial scale steel grain bins were dented or collapsed inward at the elevator complex.”
• Kittson County, MN (near Karlstad) · Thunderstorm wind 96 mph · $600,000
  “The county highway department building was severely damaged. Equipment in the building was also damaged. Peak winds were estimated at 95 mph based on extreme structural damage and related tree damage. Trees and power lines were down all around Karlstad.”
• Kittson County, MN (near Karlstad) · Thunderstorm wind 96 mph · $200,000
  “Widespread wind damage was noted across Deerwood and Arveson townships. Numerous large tree limbs were broken down in yards, shelterbelts, and groves. Peak winds were estimated at 85 to 95 mph.”
• Darke County, OH (near Union City) · Thunderstorm wind 90 mph · $60,000
  “Barns were damaged extensively. An agricultural hopper was moved approximately 1000 feet. Large trees and limbs were snapped in several locations. Corn fields were flattened. Vegetation was removed from a 30 foot area in a farm field. These occurrences were due to damaging thunderstorm winds.”
• Roseau County, MN (near Badger) · Thunderstorm wind 72 mph · $50,000
  “Several large three foot diameter trees were broken down in Badger. A wooden storage shed at the cemetery was torn off its foundation and flipped over.”
• Cochise County, AZ (near Lewis Spgs) · Thunderstorm wind 60 mph · $50,000
  “Thunderstorm winds blew off the roof of an industrial building in Sierra Vista. Part of the roof knocked over a brick wall. Part of one wall of the building also collapsed. Several trees and branches were also downed in the same area.”

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