Storm reports for August 12, 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 August 12 →

On August 12, 2017, 61 hail, 88 damaging-wind and 5 tornado reports were logged across 16 states. The largest hail reported was 2.75″ (baseball size) in Stark County, ND.

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 (61)

Damage, injuries and deaths

National Weather Service offices recorded about $835,000 in property damage and $11,000 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (154 events in 16 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Juniata County, PA (near Mc Alisterville) · Tornado EF1 · $500,000
  “The tornado touched down on the northeast side of Mcalisterville, PA, near the Juniata Mennonite School. Damage included a flipped tractor trailer, snapped pine trees, and a long swatch of snapped and uprooted trees. The main school building roof was lifted off its base.”
• Custer County, NE (near Mason City) · Thunderstorm wind 100 mph · $50,000
  “A full center pivot irrigation system was flipped over south of Ansley. Time estimated from radar.”
• Maricopa County, AZ (near Glendale) · Thunderstorm wind 64 mph · $30,000
  “Thunderstorms moved across the western portion of the greater Phoenix area during the late evening hours on August 12th, and some of the storms affected the community of Glendale. One of the stronger storms generated gusty damaging microburst winds estimated to be upwards of 65 mph.”
• Oneida County, NY (near Westdale) · Thunderstorm wind 81 mph · $20,000
  “A thunderstorm moved across the region and became severe. This thunderstorm produced severe winds and uprooted multiple trees and forced down many power lines. This storm also knocked over many camp sites and boats. This storm created damage at the Sto-Ne-Nols Campground.”
• Custer County, NE (near Broken Bow) · Thunderstorm wind 60 mph · $20,000
  “Emergency manager reports numerous damaged trees in Broken Bow.”
• San Diego County, CA (near Agua Caliente Spgs) · Thunderstorm wind 64 mph · $15,000
  “A trained spotter in Canebrake reported two car ports destroyed, numerous large tree limbs down and a roof folded over on a home.”

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