Storm reports for July 31, 2017

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 July 31 →

On July 31, 2017, 27 hail, 11 damaging-wind and 1 tornado reports were logged across 8 states. The largest hail reported was 2.00″ (hen egg size) in Marshall 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 (27)

Damage, injuries and deaths

National Weather Service offices recorded about $112,000 in property damage and $20,000 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (39 events in 8 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Manatee County, FL (near Palma Sola) · Tornado EF0 · $96,000
  “Tropical Storm Emily came ashore in the area with a broad area of toppled trees and numerous branches downed. An NWS Storm Survey team found a narrow area of enhanced damage, likely associated with a brief tornado.”
• Lee County, FL (near Big Carlos Pass Comps Site) · Thunderstorm wind 52 mph · $15,000
  “A portion of the roof at the Outrigger Beach Resort flew off one building and landed on another. Nearby mesonet stations reported winds around 45 mph at the time.”
• Marquette County, MI (near Swanzy) · Thunderstorm wind 58 mph · $1,000
  “There was a report via MPING of small tree limbs damaged near the K. I. Sawyer housing area four miles northeast of Gwinn.”
• Pima County, AZ (near Green Vly) · Thunderstorm wind 58 mph · $0
  “Five inch diameter mesquite tree snapped in half off Duval Mine Road 5 miles west of Green Valley.”
• Perkins County, SD (near Zeona) · Thunderstorm wind 60 mph
  “The storm also produced a lot of pea sized hail.”
• Cass County, ND (near Gardner) · Thunderstorm wind 60 mph
  “Numerous large tree branches were broken down in farmstead shelterbelts across southern Gardner and Gunkel townships.”

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