YearFinal SPC data

2017

1,442 tornadoes in 2017, with 10,395 hail and 16,454 wind reports, from the NOAA SPC severe weather database.

Tornado recordHail + windDaily reports (soon)Storm Events narrativesEF ScaleMax path width

Tornado deaths

EF0 635 EF1 595 EF2 132 EF3 12 EF4 2 EFU 66

Hail and wind show significant reports only (2 in or larger, 65 kt or stronger). Click a legend item to show or hide it, or "only" to see just that. Select anything on the map to open its record.

Tornadoes by month

JanFebMarAprMayJunJulAugSepOctNovDec

Hail reports by month

JanFebMarAprMayJunJulAugSepOctNovDec

Wind reports by month

JanFebMarAprMayJunJulAugSepOctNovDec

Storm days

Every day with a tornado, hail or wind report. Warmer colors mean more tornadoes; gray days had hail or wind only; a white ring marks a day with an F4/EF4 or stronger tornado.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Running count

2017 against the years around it and the 1991 to 2020 average

20171991 to 2020 average2012 to 2022 (other years)

1,442 tornadoes in 2017, 17% above the 1991 to 2020 average of 1,231.

Counts by storm day (12Z to 12Z). Reporting changed a great deal over the decades, so years far from 1991 to 2020 are not a like-for-like comparison with the average.

Busiest tornado days

#	Day	Tornadoes	F/EF4+	Deaths	Strongest	States
1	03/06/17	62	0	0	EF3	AR, IA, IL, KS, MN, MO, OK, WI
2	01/21/17	61	0	11	EF3	AL, AR, GA, LA, MS, SC, TX
3	05/18/17	58	0	0	EF2	AR, CO, KS, MO, OK, TX
4	02/28/17	55	1	4	EF4	AR, IA, IL, IN, KS, KY, MI, MO, OH, TN
5	01/02/17	39	0	0	EF2	AL, GA, LA, MS, TX
6	04/03/17	38	0	1	EF2	AL, GA, SC
7	05/19/17	34	0	0	EF1	IN, KS, MO, OK, TX
8	04/30/17	32	0	1	EF2	AL, LA, MS, TN
9	04/29/17	29	1	4	EF4	AR, IL, LA, MO, MS, OK, TX
10	05/24/17	27	0	0	EF2	FL, GA, NC, OH, SC, TN
11	06/28/17	26	0	0	EF2	IA, IL, MN, MO, WI
12	04/02/17	25	0	2	EF2	LA, MS, TX
13	04/05/17	24	0	0	EF2	AL, GA, IL, IN, KY, OH, SC, TN
14	11/05/17	24	0	0	EF2	IL, IN, OH, PA
15	05/04/17	22	0	0	EF1	GA, NC, SC, VA

Busiest severe weather days

tornado, hail and wind reports together

#	Day	All reports	Tornadoes	Hail	Wind	Largest hail	Top gust
1	05/27/17	800	14	342	444	4.25 in	83 kt (96 mph)
2	03/06/17	776	62	206	508	2.75 in	83 kt (96 mph)
3	02/28/17	705	55	333	317	3 in	88 kt (101 mph)
4	03/01/17	657	14	108	535	2.5 in	91 kt (105 mph)
5	05/18/17	634	58	264	312	2.85 in	90 kt (104 mph)
6	06/13/17	579	13	253	313	4.25 in	87 kt (100 mph)
7	06/15/17	579	0	237	342	4 in	78 kt (90 mph)
8	04/05/17	473	24	260	189	3.75 in	78 kt (90 mph)
9	03/09/17	424	17	252	155	3 in	87 kt (100 mph)
10	05/17/17	402	15	88	299	2 in	83 kt (96 mph)
11	06/16/17	383	11	110	262	2.75 in	96 kt (110 mph)
12	05/16/17	329	21	183	125	4 in	75 kt (86 mph)
13	05/01/17	328	15	2	311	1.5 in	88 kt (101 mph)
14	07/07/17	317	3	99	215	2.5 in	70 kt (81 mph)
15	03/21/17	289	2	136	151	3 in	91 kt (105 mph)

Largest hail

top 15

#	Date	Size	Place
1	06/14/17	5 in	Ector County, TX
2	06/14/17	5 in	Ector County, TX
3	06/14/17	5 in	Ector County, TX
4	06/14/17	5 in	Ector County, TX
5	06/14/17	5 in	Ector County, TX
6	04/01/17	4.5 in	Coleman County, TX
7	05/19/17	4.5 in	Coleman County, TX
8	03/26/17	4.25 in	Denton County, TX
9	05/11/17	4.25 in	Logan County, OK
10	05/27/17	4.25 in	Bates County, MO
11	05/27/17	4.25 in	Okfuskee County, OK
12	06/12/17	4.25 in	Platte County, WY
13	06/12/17	4.25 in	Platte County, WY
14	06/12/17	4.25 in	Platte County, WY
15	06/12/17	4.25 in	Weld County, CO

Strongest wind gusts

top 15, measured first on ties

#	Date	Gust	mph	Type	Place
1	04/02/17	104 kt	120	Estimated	Panola County, TX
2	08/13/17	104 kt	120	Estimated	Hall County, TX
3	06/09/17	103 kt	119	Measured	Benson County, ND
4	06/20/17	103 kt	119	Estimated	Sherman County, TX
5	06/27/17	103 kt	119	Estimated	Lincoln County, NE
6	06/08/17	100 kt	115	Measured	Toole County, MT
7	02/20/17	100 kt	115	Estimated	Williamson County, TX
8	05/03/17	100 kt	115	Estimated	Acadia Parish, LA
9	06/16/17	96 kt	110	Measured	Dodge County, NE
10	03/24/17	96 kt	110	Estimated	San Augustine County, TX
11	06/02/17	96 kt	110	Estimated	Benson County, ND
12	07/04/17	96 kt	110	Estimated	Hockley County, TX
13	08/13/17	96 kt	110	Estimated	Dallam County, TX
14	11/05/17	91 kt	105	Measured	Portage County, OH
15	03/01/17	91 kt	105	Estimated	Lawrence County, KY

F4/EF4 and stronger

Date	Rating	Tornado	State	Length	Width	Deaths	Injuries
02/28/17	EF4	Perryville, MO to Christopher, IL	MO, IL	53.5 mi	1,100 yd	1	12
04/29/17	EF4	Log Cabin to Canton, Texas	TX	21.4 mi	1,760 yd	2	25

Deadliest tornadoes

Date	Rating	Tornado	State	Length	Width	Deaths	Injuries
01/22/17	EF3	Berlin to Nashville, Georgia	GA	24.7 mi	700 yd	11	45
01/22/17	EF3	Baconton to Abbeville, Georgia	GA	70.4 mi	2,200 yd	5	88
01/21/17	EF3	Purvis to Richton, Mississippi	MS	31.1 mi	900 yd	4	57
02/28/17	EF3	Naplate to Marseilles, Illinois	IL	11.5 mi	800 yd	2	14
04/02/17	EF1	Breaux Bridge, Louisiana	LA	0.8 mi	20 yd	2	0
04/29/17	EF4	Log Cabin to Canton, Texas	TX	21.4 mi	1,760 yd	2	25
04/29/17	EF3	Eustace to Emory, Texas	TX	39.7 mi	1,760 yd	2	24
02/07/17	EF1	Donaldsonville, Louisiana	LA	6.1 mi	150 yd	1	0
02/28/17	EF4	Perryville, MO to Christopher, IL	MO, IL	53.5 mi	1,100 yd	1	12
02/28/17	EF3	Crossville, IL to Oakland City, IN	IL, IN	44.1 mi	440 yd	1	2
04/03/17	EF1	Whitmire, South Carolina	SC	0.7 mi	150 yd	1	0
04/30/17	EF2	Pickens to Durant, Mississippi	MS	23.4 mi	1,900 yd	1	0
05/16/17	EF3	Clear Lake to Prentice, Wisconsin	WI	82.5 mi	1,320 yd	1	25
05/16/17	EF2	Sayre to Canute, Oklahoma	OK	18.0 mi	1,000 yd	1	10

Storm days. A day here runs from 12Z to 12Z (6 a.m. CST to 6 a.m. CST the next morning), the way SPC counts storm days, so an overnight tornado counts with the afternoon and evening before it.
Reporting changed over time. Tornado counts rose from the 1990s on as Doppler radar, spotter networks and cameras caught more weak tornadoes. Counts from different decades are not directly comparable, especially for the weakest ratings.
F and EF ratings. The Enhanced Fujita (EF) Scale replaced the Fujita (F) Scale on 02/01/07. Both estimate wind speed from damage, but they use different damage indicators, so each rating is shown with its own scale.

Titan Archive · a Tornado Titans project Data: NOAA Storm Prediction Center severe weather database · updated 10/03/26