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The severe wind outbreak of April 9, 1991

359 wind reportsPennsylvania, Kentucky, Tennessee and 15 more states

359 damaging wind reports across 18 states between 7:49 AM and 12:30 AM the next day CDT, 7 of them 65 knots (75 mph) or stronger. 156 hail reports and 25 tornadoes the same day.

Watch the day unfold

Severe wind day · April 9, 1991

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 359 that day
Strongest gust—measured, so far
Largest hail—so far

The day in numbers

Wind reports
359
on Tuesday, April 9, 1991
75 mph or more
7
0 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
2
129 injured
Counties reporting
296
in 18 states

Hour by hour

Damaging wind reports in each hour, Central Daylight Time.

Wind reports per hour, April 9, 1991 7 AM: 1 8 AM: 2 9 AM: 4 10 AM: 5 11 AM: 14 Noon: 18 1 PM: 22 2 PM: 29 3 PM: 22 4 PM: 40 5 PM: 40 6 PM: 44 44 7 PM: 40 8 PM: 37 9 PM: 19 10 PM: 19 11 PM: 1 Midnight: 2 7 AM10 AM1 PM4 PM7 PM10 PM

The strongest winds

The 51 strongest reports with a speed. Measured gusts come from an instrument; estimated speeds are judged from damage.

Strongest wind reports, April 9, 1991
8:45 PMWashington County MD82 mph71Estimated0
10:18 AMShelby County TN78 mph68Estimated0
7:55 PMMineral County WV77 mph67Estimated0
3:20 PMWarren County OH75 mph65Estimated0
4:35 PMLawrence County KY75 mph65Estimated0
7:50 PMAllegany County MD75 mph65Estimated0
8:10 PMWashington County MD75 mph65Estimated0
12:20 PMChristian County KY74 mph64Estimated0
9:30 AMCrittenden County AR70 mph61Estimated0
10:25 AMTipton County TN70 mph61Estimated0
2:15 PMAdair County KY70 mph61Estimated0
3:40 PMMontgomery County KY70 mph61Estimated0
9:30 PMAdams County PA70 mph61Estimated0
10:03 PMBaltimore County MD70 mph61Estimated0
10:05 AMShelby County TN69 mph60Estimated0
7:00 PMRandolph County WV69 mph60Estimated0
7:20 PMPreston County WV69 mph60Estimated0
1:00 PMDavidson County TN67 mph58Estimated0
6:45 PMHarrison County WV67 mph58Estimated0
5:22 PMCuyahoga County OH66 mph57Estimated0
5:30 PMKanawha County WV66 mph57Estimated0
2:15 PMGreen County KY64 mph56Estimated0
4:20 PMFranklin County OH64 mph56Estimated0
4:40 PMDarke County OH64 mph56Estimated0
8:30 PMBerkeley County WV64 mph56Estimated0
5:17 PMSullivan County TN63 mph55Estimated0
5:50 PMWood County WV63 mph55Estimated0
9:25 PMFrederick County MD63 mph55Estimated0
2:52 PMHamilton County OH62 mph54Estimated0
2:36 PMNorthampton County PA61 mph53Estimated0
7:30 PMFrederick County VA61 mph53Estimated0
9:41 PMCarroll County MD61 mph53Estimated0
1:40 PMJefferson County KY60 mph52Estimated0
1:50 PMClark County IN60 mph52Estimated0
2:45 PMPreble County OH60 mph52Estimated0
3:40 PMLaurel County KY60 mph52Estimated0
3:46 PMRoss County OH60 mph52Estimated0
3:50 PMBath County KY60 mph52Estimated0
3:55 PMMadison County OH60 mph52Estimated0
4:10 PMPickaway County OH60 mph52Estimated0
4:42 PMWayne County MI60 mph52Estimated0
7:15 PMMonongalia County WV60 mph52Estimated0
7:30 PMGarrett County MD60 mph52Estimated0
8:20 PMWashington County MD60 mph52Estimated0
9:15 PMCentre County PA60 mph52Estimated0
7:49 AMPulaski County AR58 mph50Estimated0
3:10 PMFayette County KY58 mph50Estimated0
3:57 PMBreathitt County KY58 mph50Estimated0
8:45 PMJefferson County WV58 mph50Estimated0
9:50 PMDauphin County PA58 mph50Estimated0
10:45 PMBerks County PA58 mph50Estimated0

By state

Severe weather reports by state, April 9, 1991
Pennsylvania58—71.00
Kentucky57—51.75
Tennessee55—30.75
West Virginia52—121.75
Ohio42—81.75
Georgia24—101.75
North Carolina17—31.00
Maryland11—0—
Indiana9—73.00
Alabama8—221.75
Arkansas7—184.50
New York6—51.75
Mississippi5—271.75
Virginia3—10.88
South Carolina2—0—
Michigan1—112.75
Louisiana1—61.75
Idaho1—0—
Missouri0—71.75
Illinois0—41.75

Counties with the most wind reports

Hail and tornadoes that day

156 hail reports, 9 of 2 inches or more; 25 tornadoes.

Largest hail, April 9, 1991
10:00 AMLonoke County AR4.50
7:39 AMLonoke County AR3.00
1:28 PMSwitzerland County IN3.00
8:45 AMPrairie County AR2.75
3:15 PMCalhoun County MI2.75
3:20 PMCalhoun County MI2.75
3:28 PMJackson County MI2.75
2:25 PMSwitzerland County IN2.50
3:45 PMIngham County MI2.00
1:06 AMHowell County MO1.75
2:05 AMReynolds County MO1.75
4:45 AMJohnson County IL1.75
7:04 AMCrittenden County KY1.75
7:15 AMHempstead County AR1.75
7:45 AMWhite County AR1.75
7:55 AMPulaski County AR1.75
9:38 AMPulaski County AR1.75
1:42 PMLawrence County AL1.75
2:02 PMLawrence County AL1.75
2:42 PMRush County IN1.75
3:00 PMCalhoun County MI1.75
4:00 PMHall County GA1.75
4:00 PMWashington Parish LA1.75
4:20 PMCabell County WV1.75
4:23 PMMontgomery County MS1.75
4:30 PMEtowah County AL1.75
4:45 PMChoctaw County MS1.75
4:45 PMWebster County MS1.75
5:05 PMMason County WV1.75
5:10 PMPutnam County WV1.75
5:35 PMWalker County AL1.75
5:35 PMOktibbeha County MS1.75
5:45 PMLake County OH1.75
6:30 PMAshtabula County OH1.75
6:30 PMClay County AL1.75
6:35 PMMontgomery County AL1.75
6:43 PMJefferson Parish LA1.75
6:55 PMBullock County AL1.75
7:05 PMJefferson County AL1.75
7:15 PMTompkins County NY1.75
7:18 PMMadison County AL1.75
7:30 PMLivingston Parish LA1.75
7:30 PMSt. Clair County AL1.75
7:55 PMTompkins County NY1.75
7:55 PMJasper County MS1.75
10:00 PMBibb County GA1.75
11:35 PMColumbia County GA1.75
12:30 AMBulloch County GA1.75
8:50 PMCherokee County GA1.50
2:25 PMLamar County AL1.25
  • F0 tornado11:00 AM CDT
  • F2 tornado12:50 PM CDT
  • F2 tornado1:45 PM CDT
  • F1 tornado1:45 PM CDT
  • F1 tornado2:00 PM CDT
  • F1 tornado2:00 PM CDT
  • F0 tornado2:45 PM CDT
  • F1 tornado3:15 PM CDT
  • F1 tornado4:30 PM CDT
  • F0 tornado4:50 PM CDT
  • F0 tornado5:20 PM CDT
  • F0 tornado6:30 PM CDT
  • F0 tornado7:15 PM CDT
  • F1 tornado7:30 PM CDT
  • F1 tornado7:40 PM CDT
  • F1 tornado7:40 PM CDT
  • F1 tornado8:00 PM CDT
  • F2 tornado8:15 PM CDT
  • F1 tornado8:18 PM CDT
  • F1 tornado8:20 PM CDT
  • F1 tornado8:30 PM CDT
  • F0 tornado8:50 PM CDT
  • F1 tornado9:00 PM CDT
  • F1 tornado9:30 PM CDT
  • F0 tornado9:30 PM CDT

1991 · 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.