National Storms

September 2021 storm reports: hail, wind and tornadoes

IndependentNot affiliated with NOAA or the National Weather Service.

In September 2021, 326 hail, 734 damaging-wind and 29 tornado reports were logged on 28 storm days across 47 states. The largest hail reported was 4.50″ (softball size) in Outagamie County, WI on September 7, 2021. The most hail reports came on September 7, 2021 (123). Tornadoes killed 1. Radar estimated hail of 1 inch or larger on 30 days; the widest swath, on September 7, 2021, covered 2,105 square miles.

Source: NOAA Storm Prediction Center storm reports; NOAA MRMS radar hail estimates (MESH) via the Iowa Environmental Mesonet. Data through November 6, 2026. Methodology

← August 2021 All 2021 storm days October 2021 →

326hail reports
734wind reports
29tornado reports
4.50″largest hail
28storm days
30days with 1″+ radar hail
Sep 1: 4Sep 2: 11Sep 3: 12Sep 4: 2Sep 5: 4Sep 6: 5Sep 7: 123Sep 8: 5Sep 9: 0Sep 10: 1Sep 11: 0Sep 12: 21Sep 13: 11Sep 14: 18Sep 15: 16Sep 16: 32Sep 17: 5Sep 18: 1Sep 19: 1Sep 20: 16Sep 21: 1Sep 22: 0Sep 23: 0Sep 24: 4Sep 25: 0Sep 26: 0Sep 27: 0Sep 28: 18Sep 29: 6Sep 30: 9Sep 1Sep 4Sep 7Sep 10Sep 13Sep 16Sep 19Sep 22Sep 25Sep 28max 123
Hail reports by day, September 2021

Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.

Biggest storm days of September 2021

DayHailWindTornadoLargest hailStatesRadar 1″+ areaRadar max
Sep 7, 20211238214.50″82,105 mi²3.33″
Sep 16, 2021327543.00″5889 mi²2.64″
Sep 1, 2021486112.00″17317 mi²3.29″
Sep 15, 2021167101.25″11181 mi²2.26″
Sep 8, 202157441.25″1195 mi²3.67″
Sep 14, 2021184312.00″11922 mi²4.52″
Sep 20, 2021164122.00″8244 mi²2.17″
Sep 13, 2021114101.50″7606 mi²5.35″
Sep 12, 2021212212.50″8573 mi²2.72″
Sep 22, 20210371–91 mi²1.64″

Largest hail reported in September 2021

DaySizeLocation
Sep 7, 20214.50″ (softball)Outagamie County, WI
Sep 7, 20214.10″ (grapefruit)Outagamie County, WI
Sep 7, 20214.00″ (grapefruit)Outagamie County, WI
Sep 7, 20213.75″ (teacup)Outagamie County, WI
Sep 7, 20213.00″ (teacup)Outagamie County, WI
Sep 7, 20213.00″ (teacup)Outagamie County, WI
Sep 7, 20213.00″ (teacup)Fond du Lac County, WI
Sep 16, 20213.00″ (teacup)St. Louis County, MN
Sep 7, 20212.75″ (baseball)Outagamie County, WI
Sep 7, 20212.75″ (baseball)Outagamie County, WI

Storm reports by state, September 2021

StateHailWindTornadoLargest hail
Wisconsin902114.50″
Michigan306312.50″
Pennsylvania28071.00″
Minnesota334553.00″
New York66411.00″
Illinois254002.00″
Maryland0393–
Kansas31902.00″
Texas122102.25″
Virginia122001.75″
New Jersey0253–
South Dakota62101.25″
Colorado81801.25″
Mississippi0240–
Oklahoma61801.75″
Missouri61601.25″
Idaho61301.50″
Maine0190–
New Hampshire71201.25″
Utah41311.00″
Iowa11601.50″
Nebraska9502.00″
Vermont0140–
Wyoming5901.75″
Arkansas11201.75″
Arizona7602.00″
California4611.00″
South Carolina2901.00″
Indiana1900.75″
Kentucky090–
Massachusetts081–
Florida1521.00″
West Virginia3501.00″
North Dakota5101.00″
New Mexico1501.00″
Ohio060–
Montana050–
North Carolina1401.00″
Connecticut031–
Georgia040–
Louisiana031–
Delaware030–
Nevada030–
Rhode Island1100.75″
Alabama010–
District of Columbia010–
Washington001–

Every storm day in September 2021

Sep 1 Sep 2 Sep 3 Sep 4 Sep 5 Sep 6 Sep 7 Sep 8 Sep 9 Sep 10 Sep 11 Sep 12 Sep 13 Sep 14 Sep 15 Sep 16 Sep 17 Sep 18 Sep 19 Sep 20 Sep 21 Sep 22 Sep 23 Sep 24 Sep 27 Sep 28 Sep 29 Sep 30

A storm day runs 7 a.m. to 7 a.m. Eastern (12:00–12:00 UTC), the convention the Storm Prediction Center uses. Read more about NOAA storm reports.

Guide: Storm reports: preliminary vs final