The severe wind outbreak of May 1, 2017

311 wind reportsNew York, Pennsylvania, North Carolina and 5 more states

311 damaging wind reports across 8 states between 7:33 AM and 10:35 PM CDT, 16 of them 65 knots (75 mph) or stronger; the strongest measured gust was 101 mph in Chenango County, NY. 2 hail reports and 15 tornadoes the same day.

Watch the day unfold

Severe wind day · May 1, 2017

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 311 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: 311; on Monday, May 1, 2017
75 mph or more: 16; 2 of 86 mph (75 knots) or more
Strongest measured gust: 101 mph; 88 knots, Chenango County, NY
Measured: 18; reports with an instrument reading; the rest are estimates from damage
Killed by wind: 0; 0 injured
Counties reporting: 118; in 8 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, May 1, 2017

7:18 PM	Chenango County NY	101 mph	88	Measured
3:19 PM	McKean County PA	90 mph	78	Estimated
6:15 PM	Lycoming County PA	85 mph	74	Measured
8:16 PM	Schoharie County NY	81 mph	70	Measured
12:52 PM	Mahoning County OH	81 mph	70	Estimated
5:52 PM	Centre County PA	81 mph	70	Estimated
6:00 PM	St. Lawrence County NY	81 mph	70	Estimated
6:25 PM	Sullivan County PA	81 mph	70	Estimated
8:16 PM	Schoharie County NY	81 mph	70	Estimated
2:18 PM	Chautauqua County NY	78 mph	68	Measured
2:50 PM	Forest County PA	75 mph	65	Estimated
2:54 PM	Catawba County NC	75 mph	65	Estimated
6:45 PM	Tioga County NY	75 mph	65	Estimated
7:05 PM	Susquehanna County PA	75 mph	65	Estimated
7:10 PM	Chenango County NY	75 mph	65	Estimated
7:25 PM	Chenango County NY	75 mph	65	Estimated
12:49 PM	Mahoning County OH	70 mph	61	Estimated
2:15 PM	Clarion County PA	70 mph	61	Estimated
4:50 PM	Trumbull County OH	70 mph	61	Estimated
5:17 PM	Huntingdon County PA	70 mph	61	Estimated
5:40 PM	Centre County PA	70 mph	61	Estimated
5:46 PM	Centre County PA	70 mph	61	Estimated
5:52 PM	Centre County PA	70 mph	61	Estimated
5:53 PM	Centre County PA	70 mph	61	Estimated
6:00 PM	Clinton County PA	70 mph	61	Estimated
5:33 PM	Danville VA	69 mph	60	Estimated
5:57 PM	Chemung County NY	69 mph	60	Estimated
6:06 PM	St. Lawrence County NY	69 mph	60	Estimated
7:05 PM	Tioga County NY	69 mph	60	Estimated
7:15 PM	Chenango County NY	69 mph	60	Estimated
7:56 PM	Delaware County NY	69 mph	60	Estimated
12:52 PM	Trumbull County OH	67 mph	58	Measured
2:43 PM	Westmoreland County PA	66 mph	57	Measured
5:56 PM	Clinton County PA	66 mph	57	Measured
2:41 PM	Erie County NY	64 mph	56	Estimated
2:41 PM	Niagara County NY	64 mph	56	Estimated
4:25 PM	Ontario County NY	64 mph	56	Estimated
2:38 PM	Erie County NY	63 mph	55	Measured
4:20 PM	Steuben County NY	63 mph	55	Estimated
4:42 PM	Steuben County NY	63 mph	55	Estimated
6:12 PM	St. Lawrence County NY	63 mph	55	Estimated
6:35 PM	Bradford County PA	63 mph	55	Estimated
6:40 PM	Oneida County NY	63 mph	55	Estimated
6:47 PM	Broome County NY	63 mph	55	Estimated
6:52 PM	Broome County NY	63 mph	55	Estimated
7:05 PM	Susquehanna County PA	63 mph	55	Estimated
7:10 PM	Susquehanna County PA	63 mph	55	Estimated
7:17 PM	Chenango County NY	63 mph	55	Estimated
7:30 PM	Chenango County NY	63 mph	55	Estimated
1:36 PM	Mercer County PA	62 mph	54	Measured
4:52 PM	Stokes County NC	62 mph	54	Estimated
5:45 PM	Caswell County NC	62 mph	54	Estimated
6:00 PM	Pittsylvania County VA	62 mph	54	Estimated
3:04 PM	Jefferson County PA	61 mph	53	Measured
3:17 PM	Indiana County PA	60 mph	52	Measured
3:55 PM	Allegany County NY	60 mph	52	Measured
4:46 PM	Oswego County NY	60 mph	52	Measured
4:48 PM	Oswego County NY	60 mph	52	Measured
6:50 PM	Broome County NY	60 mph	52	Measured
6:50 PM	Broome County NY	60 mph	52	Measured
2:03 PM	Chautauqua County NY	60 mph	52	Estimated
2:06 PM	Chautauqua County NY	60 mph	52	Estimated
2:13 PM	Chautauqua County NY	60 mph	52	Estimated
2:20 PM	Cattaraugus County NY	60 mph	52	Estimated
2:25 PM	Warren County PA	60 mph	52	Estimated
2:25 PM	Warren County PA	60 mph	52	Estimated
2:28 PM	Warren County PA	60 mph	52	Estimated
2:29 PM	Erie County NY	60 mph	52	Estimated
2:36 PM	Erie County NY	60 mph	52	Estimated
2:36 PM	Niagara County NY	60 mph	52	Estimated
2:36 PM	Cattaraugus County NY	60 mph	52	Estimated
2:38 PM	Warren County PA	60 mph	52	Estimated
2:55 PM	Warren County PA	60 mph	52	Estimated
2:57 PM	Orleans County NY	60 mph	52	Estimated
3:00 PM	Elk County PA	60 mph	52	Estimated
3:05 PM	Genesee County NY	60 mph	52	Estimated
3:05 PM	Genesee County NY	60 mph	52	Estimated
3:10 PM	Elk County PA	60 mph	52	Estimated
3:12 PM	Elk County PA	60 mph	52	Estimated
3:12 PM	Orleans County NY	60 mph	52	Estimated
3:23 PM	Wyoming County NY	60 mph	52	Estimated
3:24 PM	Orleans County NY	60 mph	52	Estimated
3:24 PM	Cattaraugus County NY	60 mph	52	Estimated
3:25 PM	Genesee County NY	60 mph	52	Estimated
3:26 PM	Genesee County NY	60 mph	52	Estimated
3:26 PM	Orleans County NY	60 mph	52	Estimated
3:28 PM	Elk County PA	60 mph	52	Estimated
3:30 PM	Wyoming County NY	60 mph	52	Estimated
3:34 PM	Allegany County NY	60 mph	52	Estimated
3:40 PM	Allegany County NY	60 mph	52	Estimated
3:40 PM	Clearfield County PA	60 mph	52	Estimated
3:42 PM	Monroe County NY	60 mph	52	Estimated
3:45 PM	Monroe County NY	60 mph	52	Estimated
3:45 PM	Wyoming County NY	60 mph	52	Estimated
3:45 PM	Potter County PA	60 mph	52	Estimated
3:52 PM	Allegany County NY	60 mph	52	Estimated
3:54 PM	Allegany County NY	60 mph	52	Estimated
3:55 PM	Allegany County NY	60 mph	52	Estimated
4:00 PM	Livingston County NY	60 mph	52	Estimated
4:05 PM	Cambria County PA	60 mph	52	Estimated

By state

Severe weather reports by state, May 1, 2017

New York	117	101 mph	0	—
Pennsylvania	111	85 mph	2	1.50
North Carolina	34	—	0	—
Ohio	32	67 mph	0	—
Virginia	10	—	0	—
South Carolina	3	—	0	—
West Virginia	3	—	0	—
Maryland	1	—	0	—

Counties with the most wind reports

Washington CountyNY · 13 reports
Centre CountyPA · 13 reports
Randolph CountyNC · 10 reports
Lycoming CountyPA · 7 reports
Franklin CountyNY · 6 reports
Forsyth CountyNC · 6 reports
Allegheny CountyPA · 6 reports
Huntingdon CountyPA · 6 reports
Allegany CountyNY · 6 reports
Chenango CountyNY · 6 reports

Hail and tornadoes that day

2 hail reports, 0 of 2 inches or more; 15 tornadoes.

Largest hail, May 1, 2017

2:42 PM	Forest County PA	1.50
3:03 PM	McKean County PA	1.00

EF0 tornado9:07 AM CDT
EF0 tornado9:24 AM CDT
EF0 tornado1:30 PM CDT
EF0 tornado1:56 PM CDT
EF0 tornado2:09 PM CDT
EF0 tornado2:25 PM CDT
EF0 tornado2:27 PM CDT
EF1 tornado2:27 PM CDT
EF1 tornado2:35 PM CDT
EF1 tornado2:39 PM CDT
EF2 tornado2:40 PM CDT
EF2 tornado2:42 PM CDT
EF0 tornado2:54 PM CDT
EF1 tornado3:08 PM CDT
EF1 tornado5:44 PM CDT

2017 · 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.