Storm reports for October 21, 2017

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

← Oct 19, 2017 All 2017 storm days · October 2017 Oct 22, 2017 →

Other storms on October 21 →

On October 21, 2017, 51 hail, 70 damaging-wind and 11 tornado reports were logged across 8 states. The largest hail reported was 3.00″ (teacup size) in Jackson County, OK.

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 (51)

Damage, injuries and deaths

National Weather Service offices recorded about $375,000 in property damage and 1 injury from hail, thunderstorm wind and tornadoes across the US on this storm day (133 events in 8 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• McClain County, OK (near Goldsby) · Tornado EF1 · $100,000
  “This tornado developed just north of State Highway 9 and just west of Santa Fe Avenue where tree damage was noted. The tornado moved east damaging a business and destroying a shed along Highway 9.”
• Seminole County, OK (near Seminole) · Tornado EF1 · $50,000
  “This tornado developed on the northwest side of Seminole near the U.S. Highway 270 and Reid Street, and move southeast through town dissipating near U.S. Highway 270 and 7th Street.”
• Le Flore County, OK (near Bokoshe) · Thunderstorm wind 75 mph · $20,000
  “Strong thunderstorm wind severely damaged the roof of a home.”
• Sharp County, AR (near Evening Shade) · Thunderstorm wind 70 mph · $20,000
  “Photos showed extensive mostly roof damage to a home, with trees on the property downed or snapped.”
• Mahaska County, IA (near Oskaloosa Muni Arpt) · Thunderstorm wind 64 mph · $20,000
  “Law enforcement reported power lines down and a machine shed damaged near the intersection of Urbana Ave and Highway 23. The road was blocked due to downed power lines. This is a delayed report and time estimated from radar.”
• Polk County, AR (near Hatfield) · Thunderstorm wind 60 mph · $20,000
  “Several county roads in the area were temporarily blocked from overturned trees and power lines. One home was unlivable due to severe roof 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