Storm reports for September 12, 2011

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 September 12 →

On September 12, 2011, 29 hail, 11 damaging-wind and 0 tornado reports were logged across 9 states. The largest hail reported was 1.75″ (golf ball size) in Ontonagon County, MI.

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 (29)

Damage, injuries and deaths

National Weather Service offices recorded about $202,000 in property damage from hail, thunderstorm wind and tornadoes across the US on this storm day (40 events in 9 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Coconino County, AZ (near Flagstaff) · Hail 1.00″ · $50,000
  “One inch diameter hail covered the ground two inches deep along Lake Mary Road.”
• Coconino County, AZ (near Sunnyside) · Hail 1.50″ · $40,000
  “Quarter to ping pong ball sized hail (1 to 1 1/2 inch diameter) were reported on the east side of Flagstaff.”
• Yuma County, AZ (near Araby) · Thunderstorm wind 69 mph · $32,000
  “Isolated strong thunderstorms developed in the Yuma area during the afternoon hours on September 12th, and they produced gusty and damaging microburst winds.”
• Clark County, NV (near Las Vegas) · Thunderstorm wind 49 mph · $10,000
  “Thunderstorm winds knocked down power lines in downtown Las Vegas.”
• Greene County, VA (near Standardsville) · Thunderstorm wind 64 mph · $5,000
  “Nine trees were down along Skirmish Road.”
• Baraga County, MI (near Baraga) · Thunderstorm wind 69 mph · $1,000
  “Ten inch diameter tree was downed and power was out. Hail of unknown size was also reported.”

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