The severe wind outbreak of August 27, 2020

377 wind reportsPennsylvania, New York, South Dakota and 21 more states

377 damaging wind reports across 24 states between 7:10 AM and 12:58 AM the next day CDT, 24 of them 65 knots (75 mph) or stronger; the strongest measured gust was 104 mph in Stanley County, SD. 26 hail reports and 15 tornadoes the same day.

Watch the day unfold

Severe wind day · August 27, 2020

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 377 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: 377; on Thursday, August 27, 2020
75 mph or more: 24; 6 of 86 mph (75 knots) or more
Strongest measured gust: 104 mph; 90 knots, Stanley County, SD
Measured: 44; reports with an instrument reading; the rest are estimates from damage
Killed by wind: 1; 2 injured
Counties reporting: 128; in 24 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 27, 2020

11:01 PM	Stanley County SD	104 mph	90	Measured
11:00 PM	Stanley County SD	97 mph	84	Measured
11:14 PM	Stanley County SD	91 mph	79	Measured
3:06 PM	New Haven County CT	90 mph	78	Estimated
3:15 PM	New Haven County CT	90 mph	78	Estimated
2:18 PM	Dutchess County NY	86 mph	75	Estimated
12:58 AM	Beadle County SD	84 mph	73	Measured
11:03 PM	Haakon County SD	83 mph	72	Measured
7:25 PM	Berks County PA	81 mph	70	Measured
10:58 PM	Stanley County SD	81 mph	70	Measured
12:58 AM	Beadle County SD	81 mph	70	Measured
3:10 PM	New Haven County CT	81 mph	70	Estimated
3:12 PM	New Haven County CT	81 mph	70	Estimated
3:16 PM	New Haven County CT	81 mph	70	Estimated
6:00 PM	Putnam County NY	81 mph	70	Estimated
12:55 AM	Beadle County SD	81 mph	70	Estimated
12:56 AM	Beadle County SD	81 mph	70	Estimated
10:55 PM	Stanley County SD	78 mph	68	Measured
11:43 PM	Hughes County SD	75 mph	65	Measured
2:44 PM	Litchfield County CT	75 mph	65	Estimated
2:44 PM	Litchfield County CT	75 mph	65	Estimated
7:16 PM	Calloway County KY	75 mph	65	Estimated
11:30 PM	Stanley County SD	75 mph	65	Estimated
11:30 PM	Stanley County SD	75 mph	65	Estimated
7:09 PM	Dawes County NE	74 mph	64	Measured
11:35 PM	Hughes County SD	72 mph	63	Measured
7:17 PM	Union County NJ	71 mph	62	Measured
9:00 PM	Lawrence County SD	71 mph	62	Measured
11:09 PM	Stanley County SD	71 mph	62	Measured
7:48 PM	Richland County MT	70 mph	61	Measured
8:55 PM	Lawrence County SD	70 mph	61	Measured
2:48 PM	New Haven County CT	70 mph	61	Estimated
2:50 PM	New Haven County CT	70 mph	61	Estimated
3:22 PM	Orange County NY	70 mph	61	Estimated
4:18 PM	Westchester County NY	70 mph	61	Estimated
4:30 PM	Fairfield County CT	70 mph	61	Estimated
4:34 PM	Fairfield County CT	70 mph	61	Estimated
4:38 PM	Fairfield County CT	70 mph	61	Estimated
4:58 PM	Stark County OH	70 mph	61	Estimated
5:23 PM	Orange County NY	70 mph	61	Estimated
5:30 PM	Orange County NY	70 mph	61	Estimated
5:30 PM	Pima County AZ	70 mph	61	Estimated
6:00 PM	Putnam County NY	70 mph	61	Estimated
6:05 PM	Putnam County NY	70 mph	61	Estimated
6:18 PM	Fairfield County CT	70 mph	61	Estimated
6:42 PM	Fairfield County CT	70 mph	61	Estimated
6:44 PM	Fairfield County CT	70 mph	61	Estimated
7:50 PM	Fall River County SD	70 mph	61	Estimated
8:45 PM	Oglala Lakota County SD	70 mph	61	Estimated
9:15 PM	Jackson County SD	70 mph	61	Estimated
10:19 PM	Pennington County SD	70 mph	61	Estimated
12:10 AM	Hyde County SD	70 mph	61	Estimated
12:20 AM	Hand County SD	70 mph	61	Estimated
12:56 AM	Beadle County SD	70 mph	61	Estimated
10:10 AM	Mason County MI	69 mph	60	Measured
3:10 PM	New Haven County CT	69 mph	60	Measured
2:00 PM	Dutchess County NY	69 mph	60	Estimated
2:00 PM	Dutchess County NY	69 mph	60	Estimated
2:01 PM	Dutchess County NY	69 mph	60	Estimated
2:01 PM	Dutchess County NY	69 mph	60	Estimated
2:16 PM	Dutchess County NY	69 mph	60	Estimated
7:45 PM	Northampton County PA	69 mph	60	Estimated
11:00 PM	Stanley County SD	68 mph	59	Measured
11:39 PM	Hughes County SD	68 mph	59	Measured
12:04 AM	Hyde County SD	68 mph	59	Measured
9:05 PM	Pennington County SD	67 mph	58	Measured
10:25 PM	Ziebach County SD	67 mph	58	Measured
4:25 PM	McKean County PA	66 mph	57	Measured
9:47 PM	Meade County SD	66 mph	57	Measured
4:20 PM	Tompkins County NY	64 mph	56	Measured
10:03 PM	Pennington County SD	64 mph	56	Measured
8:40 AM	Stark County ND	64 mph	56	Estimated
4:50 PM	Valley County MT	64 mph	56	Estimated
7:36 PM	Marshall County KY	64 mph	56	Estimated
7:55 PM	Graves County KY	64 mph	56	Estimated
8:55 PM	Pennington County SD	63 mph	55	Measured
9:51 PM	Pennington County SD	63 mph	55	Measured
2:55 PM	St. Joseph County IN	63 mph	55	Estimated
3:48 PM	Mahoning County OH	63 mph	55	Estimated
4:09 PM	Portage County OH	63 mph	55	Estimated
4:33 PM	LaPorte County IN	63 mph	55	Estimated
4:44 PM	St. Joseph County IN	63 mph	55	Estimated
4:44 PM	St. Joseph County IN	63 mph	55	Estimated
5:14 PM	Stark County OH	63 mph	55	Estimated
5:57 PM	Stark County OH	63 mph	55	Estimated
7:20 PM	Northampton County PA	63 mph	55	Estimated
7:22 PM	Berks County PA	63 mph	55	Estimated
7:22 PM	Bucks County PA	63 mph	55	Estimated
7:30 PM	Lehigh County PA	63 mph	55	Estimated
7:30 PM	Northampton County PA	63 mph	55	Estimated
9:55 PM	Meade County SD	62 mph	54	Measured
11:23 PM	Sully County SD	62 mph	54	Measured
1:55 PM	St. Clair County MI	62 mph	54	Estimated
3:20 PM	Erie County NY	61 mph	53	Measured
12:54 AM	Beadle County SD	61 mph	53	Measured
3:22 PM	Trumbull County OH	60 mph	52	Measured
6:03 PM	Allegheny County PA	60 mph	52	Measured
9:20 PM	Jackson County SD	60 mph	52	Measured
10:04 PM	Pennington County SD	60 mph	52	Measured
10:47 PM	Haakon County SD	60 mph	52	Measured

By state

Severe weather reports by state, August 27, 2020

Pennsylvania	124	81 mph	0	—
New York	89	64 mph	8	2.00
South Dakota	47	104 mph	7	1.75
Connecticut	27	69 mph	1	0.75
Alabama	19	—	0	—
Ohio	16	60 mph	2	0.75
Arkansas	8	—	0	—
Virginia	6	—	0	—
Massachusetts	5	—	0	—
New Jersey	5	71 mph	0	—
Tennessee	5	—	0	—
Indiana	4	—	0	—
Kentucky	3	—	0	—
Michigan	3	69 mph	0	—
Wisconsin	3	—	0	—
West Virginia	3	—	0	—
Montana	2	70 mph	0	—
Texas	2	—	0	—
North Dakota	1	—	4	2.00
Wyoming	1	—	4	1.25
Arizona	1	—	0	—
Florida	1	—	0	—
Mississippi	1	—	0	—
Nebraska	1	74 mph	0	—

Counties with the most wind reports

Indiana CountyPA · 16 reports
Allegheny CountyPA · 14 reports
Dutchess CountyNY · 12 reports
Litchfield CountyCT · 11 reports
Westmoreland CountyPA · 9 reports
Stanley CountySD · 9 reports
Broome CountyNY · 9 reports
New Haven CountyCT · 9 reports
Chautauqua CountyNY · 7 reports
Berks CountyPA · 7 reports

Hail and tornadoes that day

26 hail reports, 2 of 2 inches or more; 15 tornadoes.

Largest hail, August 27, 2020

2:25 PM	Livingston County NY	2.00
8:00 PM	Grant County ND	2.00
6:20 PM	Harding County SD	1.75
7:12 PM	Perkins County SD	1.75
7:30 PM	Butte County SD	1.75
7:38 PM	Hettinger County ND	1.75
8:13 PM	Grant County ND	1.75
8:16 PM	Grant County ND	1.50
2:12 PM	Dutchess County NY	1.25
8:14 PM	Crook County WY	1.25
2:14 PM	Dutchess County NY	1.00
3:44 PM	Broome County NY	1.00
5:30 PM	Orange County NY	1.00
7:25 PM	Crook County WY	1.00
7:25 PM	Perkins County SD	1.00
7:30 PM	Perkins County SD	1.00
7:30 PM	Oglala Lakota County SD	1.00
7:40 PM	Crook County WY	1.00
8:35 PM	Weston County WY	1.00
8:45 PM	Harding County SD	1.00
2:23 PM	Dutchess County NY	0.88
4:15 PM	Westchester County NY	0.88
2:29 PM	Litchfield County CT	0.75
4:59 PM	Stark County OH	0.75
5:52 PM	Suffolk County NY	0.75
6:08 PM	Stark County OH	0.75

EF1 tornado1:11 PM CDT
EF0 tornado2:24 PM CDT
EF0 tornado2:36 PM CDT
EF1 tornado2:53 PM CDT
EF1 tornado5:15 PM CDT
EF0 tornado6:29 PM CDT
EF0 tornado6:45 PM CDT
EF1 tornado7:13 PM CDT
EF1 tornado8:31 PM CDT
EF0 tornado8:55 PM CDT
EF1 tornado9:13 PM CDT
EF1 tornado9:24 PM CDT
EF2 tornado10:07 PM CDT
EF0 tornado12:56 AM CDT
EF1 tornado12:56 AM CDT

2020 · 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.