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The severe wind outbreak of September 7, 2001

332 wind reportsKansas, Iowa, Oklahoma and 10 more states

332 damaging wind reports across 13 states between 1:00 AM and 12:55 AM the next day CDT, 20 of them 65 knots (75 mph) or stronger. 180 hail reports and 7 tornadoes the same day.

Watch the day unfold

Severe wind day · September 7, 2001

How the day unfolded

Every damaging wind report of the day at its logged time, with the day's hail reports and tornadoes, and the counties they reached.

About this replay
Central time—Historical replay — logged report times
Wind reports—of 332 that day
Strongest gust—measured, so far
Largest hail—so far

The day in numbers

Wind reports
332
on Friday, September 7, 2001
75 mph or more
20
3 of 86 mph (75 knots) or more
Strongest measured gust
—
No measured gust reported
Measured
0
reports with an instrument reading; the rest are estimates from damage
Killed by wind
0
4 injured
Counties reporting
197
in 13 states

Hour by hour

Damaging wind reports in each hour, Central Daylight Time.

Wind reports per hour, September 7, 2001 1 AM: 2 2 AM: 1 3 AM: 0 4 AM: 0 5 AM: 0 6 AM: 1 7 AM: 2 8 AM: 0 9 AM: 1 10 AM: 1 11 AM: 0 Noon: 5 1 PM: 8 2 PM: 5 3 PM: 14 4 PM: 15 5 PM: 27 6 PM: 35 7 PM: 47 8 PM: 65 65 9 PM: 41 10 PM: 34 11 PM: 15 Midnight: 13 1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM

The strongest winds

The 100 strongest reports with a speed. Measured gusts come from an instrument; estimated speeds are judged from damage.

Strongest wind reports, September 7, 2001
10:40 PMAppanoose County IA90 mph78Estimated0
9:22 PMWarren County IA86 mph75Estimated0
10:45 PMAppanoose County IA86 mph75Estimated0
3:10 PMStory County IA81 mph70Estimated0
3:35 PMHardin County IA81 mph70Estimated0
4:50 PMBremer County IA81 mph70Estimated0
5:29 PMCowley County KS81 mph70Estimated0
7:35 PMAdams County IA81 mph70Estimated0
7:50 PMDouglas County KS81 mph70Estimated0
8:00 PMAllen County KS81 mph70Estimated0
8:05 PMJefferson County KS81 mph70Estimated0
9:04 PMLafayette County MO81 mph70Estimated0
8:45 PMClay County MO78 mph68Estimated0
3:10 PMStory County IA75 mph65Estimated0
3:15 PMStory County IA75 mph65Estimated0
3:40 PMHardin County IA75 mph65Estimated0
7:05 PMSauk County WI75 mph65Estimated0
7:15 PMLyon County KS75 mph65Estimated0
7:52 PMAdams County IA75 mph65Estimated0
10:50 PMBlack Hawk County IA75 mph65Estimated0
3:30 PMStory County IA74 mph64Estimated0
7:45 PMOsage County OK72 mph63Estimated0
8:10 PMEllsworth County KS71 mph62Estimated0
10:10 PMMcIntosh County OK71 mph62Estimated0
5:41 PMCowley County KS70 mph61Estimated0
5:50 PMCowley County KS70 mph61Estimated0
6:55 PMPawnee County OK70 mph61Estimated0
6:55 PMGreenwood County KS70 mph61Estimated0
6:58 PMWilson County KS70 mph61Estimated0
7:05 PMWoodson County KS70 mph61Estimated0
7:10 PMCass County MO70 mph61Estimated0
7:30 PMChautauqua County KS70 mph61Estimated0
7:35 PMOsage County OK70 mph61Estimated0
7:40 PMOsage County KS70 mph61Estimated0
7:40 PMDouglas County KS70 mph61Estimated0
7:42 PMAllen County KS70 mph61Estimated0
7:45 PMShawnee County KS70 mph61Estimated0
7:47 PMDouglas County KS70 mph61Estimated0
8:00 PMWashington County OK70 mph61Estimated0
8:00 PMJohnson County KS70 mph61Estimated0
8:00 PMJefferson County KS70 mph61Estimated0
8:10 PMCreek County OK70 mph61Estimated0
8:10 PMJefferson County KS70 mph61Estimated0
8:13 PMJohnson County KS70 mph61Estimated0
8:13 PMJohnson County KS70 mph61Estimated0
8:15 PMLinn County KS70 mph61Estimated0
8:20 PMTulsa County OK70 mph61Estimated0
8:20 PMJohnson County KS70 mph61Estimated0
8:23 PMCass County MO70 mph61Estimated0
8:25 PMLeavenworth County KS70 mph61Estimated0
8:30 PMJackson County MO70 mph61Estimated0
8:40 PMJackson County MO70 mph61Estimated0
8:45 PMRogers County OK70 mph61Estimated0
8:45 PMEllsworth County KS70 mph61Estimated0
8:57 PMWarren County IA70 mph61Estimated0
8:57 PMWarren County IA70 mph61Estimated0
9:00 PMCraig County OK70 mph61Estimated0
9:10 PMOkmulgee County OK70 mph61Estimated0
9:10 PMClarke County IA70 mph61Estimated0
9:10 PMCaldwell County MO70 mph61Estimated0
9:15 PMWagoner County OK70 mph61Estimated0
9:20 PMOkfuskee County OK70 mph61Estimated0
9:24 PMLivingston County MO70 mph61Estimated0
9:30 PMOttawa County OK70 mph61Estimated0
9:42 PMLivingston County MO70 mph61Estimated0
9:44 PMDelaware County OK70 mph61Estimated0
9:45 PMSaline County MO70 mph61Estimated0
9:46 PMJasper County IA70 mph61Estimated0
9:55 PMSaline County MO70 mph61Estimated0
9:55 PMLivingston County MO70 mph61Estimated0
9:58 PMChariton County MO70 mph61Estimated0
10:15 PMMuskogee County OK70 mph61Estimated0
10:25 PMBenton County IA70 mph61Estimated0
10:30 PMWayne County IA70 mph61Estimated0
10:30 PMBenton County IA70 mph61Estimated0
10:35 PMCherokee County OK70 mph61Estimated0
10:39 PMPoweshiek County IA70 mph61Estimated0
10:42 PMAdair County MO70 mph61Estimated0
10:57 PMAdair County OK70 mph61Estimated0
11:15 PMPittsburg County OK70 mph61Estimated0
11:45 PMBenton County AR70 mph61Estimated0
12:00 AMWashington County IA70 mph61Estimated0
12:20 AMLe Flore County OK70 mph61Estimated0
12:30 AMCarroll County AR70 mph61Estimated0
12:38 AMPushmataha County OK70 mph61Estimated0
12:45 AMWashington County AR70 mph61Estimated0
12:45 AMMadison County AR70 mph61Estimated0
12:55 AMChoctaw County OK70 mph61Estimated0
12:55 AMFranklin County AR70 mph61Estimated0
4:20 PMBarry County MI69 mph60Estimated0
4:50 PMGratiot County MI69 mph60Estimated0
5:05 PMEaton County MI69 mph60Estimated0
7:50 PMDouglas County KS69 mph60Estimated0
8:27 PMBates County MO69 mph60Estimated0
9:45 PMHughes County OK69 mph60Estimated0
9:49 PMGrundy County MO68 mph59Estimated0
7:14 PMNeosho County KS67 mph58Estimated0
7:15 AMUnion County IA66 mph57Estimated0
3:11 PMPolk County IA66 mph57Estimated0
3:21 PMStory County IA66 mph57Estimated0

By state

Severe weather reports by state, September 7, 2001
Kansas75—782.75
Iowa59—61.00
Oklahoma56—712.00
Missouri45—71.00
Wisconsin43—11.00
Michigan21—30.75
Illinois11—0—
Arkansas9—0—
Ohio4—0—
Indiana3—10.88
Kentucky3—0—
Nebraska2—93.00
Texas1—41.75

Counties with the most wind reports

Hail and tornadoes that day

180 hail reports, 11 of 2 inches or more; 7 tornadoes.

Largest hail, September 7, 2001
5:20 PMSaline County NE3.00
5:03 PMRussell County KS2.75
4:05 PMSedgwick County KS2.50
4:08 PMSedgwick County KS2.50
4:43 PMRussell County KS2.50
4:02 PMSedgwick County KS2.00
4:03 PMSedgwick County KS2.00
5:29 PMDickinson County KS2.00
5:45 PMKingfisher County OK2.00
6:15 PMSedgwick County KS2.00
6:15 PMSedgwick County KS2.00
4:03 PMSedgwick County KS1.75
4:04 PMSedgwick County KS1.75
4:10 PMSedgwick County KS1.75
4:10 PMSedgwick County KS1.75
4:15 PMRush County KS1.75
4:22 PMBarton County KS1.75
4:30 PMReno County KS1.75
4:35 PMReno County KS1.75
4:38 PMRussell County KS1.75
4:45 PMReno County KS1.75
4:53 PMRussell County KS1.75
5:10 PMKay County OK1.75
5:22 PMGarfield County OK1.75
5:25 PMKiowa County KS1.75
5:26 PMDickinson County KS1.75
5:28 PMKingfisher County OK1.75
5:29 PMGarfield County OK1.75
5:35 PMClay County KS1.75
5:40 PMLincoln County KS1.75
5:40 PMLancaster County NE1.75
5:50 PMSumner County KS1.75
5:55 PMSumner County KS1.75
5:55 PMCanadian County OK1.75
5:58 PMSedgwick County KS1.75
6:24 PMSedgwick County KS1.75
6:55 PMJefferson County NE1.75
7:00 PMGage County NE1.75
7:30 PMOsage County OK1.75
7:50 PMCleveland County OK1.75
10:00 PMMurray County OK1.75
10:43 PMLove County OK1.75
12:35 AMCooke County TX1.75
7:15 PMGrady County OK1.50
12:35 AMCooke County TX1.50
9:05 PMPottawatomie County OK1.25
11:45 PMCooke County TX1.25
3:10 AMPolk County NE1.00
5:00 AMMarshall County KS1.00
3:41 PMAlfalfa County OK1.00
  • F0 tornado3:25 PM CDT
  • F1 tornado4:48 PM CDT
  • F1 tornado5:26 PM CDT
  • F1 tornado5:59 PM CDT
  • F0 tornado6:00 PM CDT
  • F0 tornado6:30 PM CDT
  • F1 tornado7:03 PM CDT

2001 · On this date in other years · The biggest severe wind days

  1. A report is a single damage or measurement report to the National Weather Service. Several reports can describe one gust front, so reports are not storms.
  2. Reporting has grown with population, spotter networks and the internet, so counts from different decades are not directly comparable.
  3. Thunderstorm wind reports start at 50 knots (58 mph). SPC began flagging measured against estimated speeds in 2006; earlier reports are shown as estimated.

Storm Prediction Center severe weather database, 1955 to 2025. A day is SPC’s calendar date in Central Standard Time; a severe wind day here has 300 or more damaging wind reports, or 15 or more of 75 knots (86 mph) or more.