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Tornado Home Statistics Current Year Past Years

Maps

Rating/Time

Length/Width

Fatalities

Click images to enlarge

Maps

Rating/Time

Length/Width

Fatalities

Click images to enlarge

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Number of PA Tornadoes by Year Least Active Years Most Active Years

1950 5 1951 5 1952 8 1953 6 1954 22 1955 3 1956 6 1957 8 1958 1 1959 0 1960 3 1961 6 1962 4 1963 4 1964 6 1965 3 1966 4 1967 3 1968 5 1969 2 1970 12 1971 3 1972 2 1973 12 1974 7 1975 15 1976 23 1977 13 1978 15 1979 14 1980 17 1981 17 1982 4 1983 16 1984 8 1985 33 1986 6 1987 6 1988 6 1989 11 1990 19 1991 20 1992 31 1993 13 1994 27 1995 6 1996 26 1997 14 1998 59 1999 9 2000 5 2001 12 2002 17 2003 9 2004 26 2005 10 2006 8 2007 7 2008 5 2009 7 2010 17 2011 30 2012 12 2013 9 2014 9 2015 12 2016 9 2017 24 2018 32 2019 35 2020 7 2021 44 2022 8 2023 24

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Most Tornadoes by Month
Month	Total	Year(s)
January	2	1992 & 1999
February	2	2016 & 2017
March	8	1976
April	14	2019
May	22	1998
June	27	1998
July	20	1992
August	12	2023
September	9	2004
October	16	2018
November	8	1996
December	5	2006

Last Tornado by Month
Month	Year
January	2019
February	2018
March	2022
April	2023
May	2022
June	2023
July	2023
August	2023
September	2021
October	2021
November	2020
December	2006

Most Tornadoes 1 Month
Total	Month & Year
27	June 1998
22	May 1998
20	May 1985
20	July 1992
17	May 2011
16	October 2018
16	May 2019
14	April 2019
14	July 2021
12	July 1996
12	October 2021
12	August 2023
11	April 1991
10	July 1976

Largest PA Tornado Outbreaks (8 or more)
Total	Date(s)
21	5/31/1998
20	5/31/1985
20	6/2/1998
16	10/2/2018
14	7/29/2021
11	4/9/1991
11	(5) 5/28/2019 (6) 5/29/2019
10	(8) 5/26/2011 (2) 5/27/2011
9	9/17/2004
9	(4) 4/14/2019 (5) 4/15/2019
9	10/21/2021
8	7/17/1992
8	11/8/1996
8	4/28/2002
8	5/1/2017

Tornadoes on 3 Consecuative Days (All Occurances)
Total	Dates
5	(2) 7/19/1983 (1) 7/20/1983 (1) 7/21/1983
42	(21) 5/31/1998 (1) 6/1/1998 (20) 6/2/1998
3	(1) 7/26/2002 (1) 7/27/2002 (1) 7/28/2002

Maps

Rating/Time

Length/Width

Fatalities

Click images to enlarge
Widest Pennsylvania Tornadoes Width (yards) Date County Rating 3,330 5/31/1985 Clearfield, Clinton, Centre, Lycoming 4 1,760 7/2/1970 Lancaster 2 1,230 11/20/1989 Huntingdon 2 1,200 6/2/1998 Somerset 4 1,200 4/1/1998 Montour 0 1,000 5/31/1985 Warren, Mckean, Elk 4 910 5/31/1985 Lycoming, Union, Northumberland 3 900 7/21/2003 Lycoming 1 880 6/2/1998 Somerset, Garrett (MD), Allegany (MD) 2 880 5/31/1998 Somerset 3 880 5/31/1998 Lancaster 2 880 7/18/1997 Lycoming 1 880 6/18/1970 Lebanon, Berks 3 880 7/19/1996 Blair 1	Longest Pennsylvania Tornadoes Length (miles) Date County Rating 69.0 5/31/1985 Clearfield, Clinton, Centre, Lycoming 4 56.2* 5/31/1985 Trumbull (OH), Mercer, Crawford, Venango, Forest 4 47.0* 5/31/1985 Portage (OH), Trumball (OH), Mercer 5 45.3 6/4/1975 Beaver, Allegheny, Westmoreland 2 39.0 5/31/1985 Beaver, Butler 3 38.0 5/22/1983 Allegheny, Westmoreland, Indiana 2 36.5* 6/2/1998 Somerset, Garrett (MD), Allegany (MD) 4 33.4* 6/22/1985 Ashtabula (OH), Crawford 2 32.0 6/2/1998 Allegheny, Westmoreland 1 29.3 6/2/1971 Erie, Warren 3 *Tornado path not entirely in Pennsylvania

Maps

Rating/Time

Length/Width

Fatalities

Pennsylvania Tornado Fatalities Fatalities Date County Rating 1 3/22/1955 Chester 3 2 8/3/1963 Allegheny 3 1 6/18/1970 Lebanon 3 1 7/11/1976 Jefferson 2 1 7/11/1976 Westmoreland 3 1 7/23/1978 Clarion 1 1 9/5/1979 Chester 2 12 5/31/1985 Erie 4 1 5/31/1985 Crawford 2 16 5/31/1985 (8) Crawford (8) Venango 4 2 5/31/1985 Crawford 3 7 5/31/1985 Forest 4 8 5/31/1985 Mercer 5 4 5/31/1985 Mckean 4 9 5/31/1985 (3) Beaver (6) Butler 3 6 5/31/1985 (2) Lycoming (2) Union (2) Northumberland 4 1 6/9/1993 Chester 1 3 7/27/1994 Montgomery 3 1 8/16/1997 Sullivan 1 1 5/31/1998 Somerset 3 2 6/2/1998 Wyoming 3 1 11/10/2002 Mercer 2 1 12/1/2006 Dauphin 1 1 9/1/2021 Montgomery 2

Click image to enlarge Fatalities by Month Month Total January 0 February 0 March 1 April 0 May 66 June 4 July 6 August 3 September 2 October 0 November 1 December 1 Fatalities by Rating Rating Fatalities EF0 0 EF1 4 EF2 5 EF3 22 EF4 45 EF5 8

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Lines on the maps DO NOT indicate exact paths or path widths.

1950-2017 tornado data comes from SPC Database. More recent data is compiled from Tornado reports (Public Information Statements).

Additional sources: Land Area | Census Data

Note: The data on this page DOES reflect the information listed on the 'Past Years' tornado page. UPDATED 9/2023