The severe wind outbreak of August 11, 2021

482 wind reportsOhio, Illinois, Michigan and 19 more states

482 damaging wind reports across 22 states between 1:00 AM and 9:48 PM CDT, 9 of them 65 knots (75 mph) or stronger; the strongest measured gust was 87 mph in Nye County, NV. 12 hail reports and 12 tornadoes the same day.

Watch the day unfold

Severe wind day · August 11, 2021

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 482 that day

Strongest gust—measured, so far

Largest hail—so far

The day’s milestones

Wind reportsLarger and brighter with speed; filled when measured, a ring when estimated

Hail and tornadoesHail reports as diamonds; the day's tornado paths in green

Counties reportingLit at their first report, brighter with a 65-knot gust or 2-inch hail

Source: NOAA Storm Prediction Center severe weather database (wind, hail and tornado reports with their logged times and places). Each report is a damage or measurement report, not a separate storm; several can describe one gust front. Tornado paths are drawn at a typical forward speed of 35 mph. Times are Central Daylight Time.

The day in numbers

Wind reports: 482; 40th of 15,807 days with wind reports since 1955
75 mph or more: 9; 2 of 86 mph (75 knots) or more
Strongest measured gust: 87 mph; 76 knots, Nye County, NV
Measured: 33; reports with an instrument reading; the rest are estimates from damage
Killed by wind: 1; 5 injured
Counties reporting: 202; in 22 states

Hour by hour

Damaging wind reports in each hour, Central Daylight Time.

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, August 11, 2021

8:18 PM	Wichita County KS	100 mph	87	Estimated	0
6:30 PM	Nye County NV	87 mph	76	Measured	0
8:35 AM	Bureau County IL	81 mph	70	Estimated	0
9:01 AM	LaSalle County IL	81 mph	70	Estimated	0
3:00 PM	Macomb County MI	75 mph	65	Measured	0
3:50 PM	Montgomery County MD	75 mph	65	Estimated	0
4:00 PM	Lorain County OH	75 mph	65	Estimated	0
4:11 PM	Cuyahoga County OH	75 mph	65	Estimated	0
5:33 PM	Crawford County PA	75 mph	65	Estimated	0
1:46 AM	Ottawa County OH	74 mph	64	Measured	0
1:24 PM	Defiance County OH	72 mph	63	Measured	0
2:28 PM	Lucas County OH	72 mph	63	Measured	0
6:44 AM	Mercer County IL	70 mph	61	Estimated	0
9:16 AM	Bureau County IL	70 mph	61	Estimated	0
11:00 AM	St. Joseph County IN	70 mph	61	Estimated	0
11:25 AM	St. Joseph County MI	70 mph	61	Estimated	0
11:45 AM	St. Joseph County MI	70 mph	61	Estimated	0
2:01 PM	Lenawee County MI	70 mph	61	Estimated	0
2:21 PM	Monroe County MI	70 mph	61	Estimated	0
4:13 PM	Richland County OH	70 mph	61	Estimated	0
9:06 AM	LaSalle County IL	69 mph	60	Measured	0
8:54 AM	LaSalle County IL	69 mph	60	Estimated	0
8:56 AM	Lee County IL	69 mph	60	Estimated	0
9:08 AM	LaSalle County IL	69 mph	60	Estimated	0
9:17 AM	DeKalb County IL	69 mph	60	Estimated	0
9:18 AM	Kendall County IL	69 mph	60	Estimated	0
9:19 AM	LaSalle County IL	69 mph	60	Estimated	0
9:22 AM	Kendall County IL	69 mph	60	Estimated	0
9:28 AM	Kane County IL	69 mph	60	Estimated	0
9:34 AM	Kane County IL	69 mph	60	Estimated	0
9:36 AM	Winnebago County IL	69 mph	60	Estimated	0
9:37 AM	Grundy County IL	69 mph	60	Estimated	0
9:47 AM	DuPage County IL	69 mph	60	Estimated	0
9:49 AM	Boone County IL	69 mph	60	Estimated	0
9:54 AM	Will County IL	69 mph	60	Estimated	0
10:00 AM	Kane County IL	69 mph	60	Estimated	0
10:01 AM	McHenry County IL	69 mph	60	Estimated	0
10:04 AM	McHenry County IL	69 mph	60	Estimated	0
10:05 AM	McHenry County IL	69 mph	60	Estimated	0
10:08 AM	Winnebago County IL	69 mph	60	Estimated	1
10:08 AM	Cook County IL	69 mph	60	Estimated	0
10:09 AM	McHenry County IL	69 mph	60	Estimated	0
10:17 AM	Lake County IL	69 mph	60	Estimated	0
10:18 AM	Lake County IL	69 mph	60	Estimated	0
10:26 AM	Lake County IL	69 mph	60	Estimated	0
1:55 PM	Delta County MI	69 mph	60	Estimated	0
2:02 PM	Rappahannock County VA	69 mph	60	Estimated	0
2:20 PM	Washington County MD	69 mph	60	Estimated	0
2:34 PM	Lucas County OH	69 mph	60	Estimated	0
2:40 PM	Frederick County MD	69 mph	60	Estimated	0
2:40 PM	Frederick County MD	69 mph	60	Estimated	0
2:40 PM	Loudoun County VA	69 mph	60	Estimated	0
2:50 PM	Madison County VA	69 mph	60	Estimated	0
2:59 PM	Ottawa County OH	69 mph	60	Estimated	0
2:59 PM	Ottawa County OH	69 mph	60	Estimated	0
3:46 PM	Richland County OH	69 mph	60	Estimated	0
4:08 PM	Lorain County OH	69 mph	60	Estimated	0
4:18 PM	Cuyahoga County OH	69 mph	60	Estimated	0
4:21 PM	Cuyahoga County OH	69 mph	60	Estimated	0
4:57 PM	Summit County OH	69 mph	60	Estimated	0
5:04 PM	Trumbull County OH	69 mph	60	Estimated	0
5:06 PM	Portage County OH	69 mph	60	Estimated	0
5:11 PM	Portage County OH	69 mph	60	Estimated	0
5:25 PM	Trumbull County OH	69 mph	60	Estimated	0
5:32 PM	Crawford County PA	69 mph	60	Estimated	0
5:39 PM	Crawford County PA	69 mph	60	Estimated	0
5:46 PM	Trumbull County OH	69 mph	60	Estimated	0
5:51 PM	Crawford County PA	69 mph	60	Estimated	0
9:24 AM	Kendall County IL	68 mph	59	Measured	0
9:35 AM	Kendall County IL	68 mph	59	Measured	0
10:46 AM	Marshall County IN	68 mph	59	Estimated	0
11:00 AM	Marshall County IN	68 mph	59	Estimated	0
11:00 AM	Fulton County IN	68 mph	59	Estimated	0
11:05 AM	Elkhart County IN	68 mph	59	Estimated	0
11:10 AM	Elkhart County IN	68 mph	59	Estimated	0
11:10 AM	Elkhart County IN	68 mph	59	Estimated	0
11:15 AM	Kosciusko County IN	68 mph	59	Estimated	0
11:18 AM	Cass County IN	68 mph	59	Estimated	0
11:18 AM	Kosciusko County IN	68 mph	59	Estimated	0
11:20 AM	Kosciusko County IN	68 mph	59	Estimated	0
11:30 AM	Whitley County IN	68 mph	59	Estimated	0
11:30 AM	Whitley County IN	68 mph	59	Estimated	0
11:30 AM	Whitley County IN	68 mph	59	Estimated	0
11:40 AM	Elkhart County IN	68 mph	59	Estimated	0
11:45 AM	Allen County IN	68 mph	59	Estimated	0
11:50 AM	Allen County IN	68 mph	59	Estimated	0
11:57 AM	Steuben County IN	68 mph	59	Estimated	0
11:58 AM	Elkhart County IN	68 mph	59	Estimated	0
12:00 PM	DeKalb County IN	68 mph	59	Estimated	0
12:02 PM	Elkhart County IN	68 mph	59	Estimated	0
12:05 PM	DeKalb County IN	68 mph	59	Estimated	0
12:09 PM	Allen County IN	68 mph	59	Estimated	0
12:10 PM	Allen County IN	68 mph	59	Estimated	0
12:13 PM	Steuben County IN	68 mph	59	Estimated	0
12:14 PM	Allen County IN	68 mph	59	Estimated	0
12:17 PM	Allen County IN	68 mph	59	Estimated	0
12:23 PM	Elkhart County IN	68 mph	59	Estimated	0
12:25 PM	Grant County IN	68 mph	59	Estimated	0
12:29 PM	LaGrange County IN	68 mph	59	Estimated	0
12:30 PM	St. Joseph County MI	68 mph	59	Estimated	0

By state

Severe weather reports by state, August 11, 2021

Ohio	90	74 mph	1	0.75
Illinois	69	69 mph	1	1.00
Michigan	64	75 mph	0	—
Virginia	57	—	1	1.75
Indiana	49	67 mph	0	—
Pennsylvania	37	58 mph	0	—
New York	26	61 mph	0	—
Maryland	25	55 mph	0	—
Wisconsin	10	58 mph	3	1.00
Georgia	9	—	2	1.00
North Carolina	9	—	0	—
New Jersey	9	59 mph	0	—
Tennessee	7	—	1	1.00
West Virginia	6	—	0	—
California	5	58 mph	0	—
Arizona	3	61 mph	0	—
Mississippi	2	—	0	—
Kansas	1	—	1	0.88
Alabama	1	—	0	—
Nevada	1	87 mph	0	—
South Carolina	1	—	0	—
Vermont	1	—	0	—
Iowa	0	—	1	1.00
Missouri	0	—	1	1.00

Counties with the most wind reports

Kane CountyIL · 11 reports
Cuyahoga CountyOH · 11 reports
Fulton CountyOH · 10 reports
Oakland CountyMI · 8 reports
Elkhart CountyIN · 8 reports
Lake CountyIL · 8 reports
St. Joseph CountyMI · 8 reports
LaSalle CountyIL · 7 reports
Frederick CountyMD · 7 reports
Allen CountyIN · 7 reports

Hail and tornadoes that day

12 hail reports, 0 of 2 inches or more; 12 tornadoes.

Largest hail, August 11, 2021

2:40 PM	Madison County VA	1.75
5:34 AM	Macon County MO	1.00
6:25 AM	Des Moines County IA	1.00
8:01 AM	Rock Island County IL	1.00
1:15 PM	Monroe County WI	1.00
1:58 PM	Monroe County WI	1.00
2:51 PM	Franklin County GA	1.00
3:10 PM	Waupaca County WI	1.00
4:16 PM	Polk County GA	1.00
7:16 PM	Bedford County TN	1.00
8:18 PM	Wichita County KS	0.88
2:45 PM	Hancock County OH	0.75

EF1 tornado1:40 PM CDT
EF1 tornado1:45 PM CDT
EFU tornado1:49 PM CDT
EF1 tornado1:55 PM CDT
EF0 tornado2:00 PM CDT
EF0 tornado2:08 PM CDT
EF0 tornado2:14 PM CDT
EF0 tornado3:04 PM CDT
EF0 tornado5:40 PM CDT
EF0 tornado6:08 PM CDT
EF0 tornado6:12 PM CDT
EF0 tornado8:01 PM CDT

2021 · On this date in other years · The biggest severe wind days

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.
Reporting has grown with population, spotter networks and the internet, so counts from different decades are not directly comparable.
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.