Tornado Alerts Near Mercersburg, PA 17236

🌪️ Current Alert Status

Live NWS tornado and severe weather alerts

✅

All Clear

No active tornado alerts near Mercersburg

There are currently no tornado warnings, watches, or severe thunderstorm alerts in effect for the Mercersburg area. This page updates every 60 seconds from the National Weather Service.

Historical Tornado Risk

Activity level High

Average per year 5.6 tornados

Peak season month June

Total on record 280 tornados

📋 Tornado History

Historical tornado events within 250 miles of Mercersburg

EF Rating	Damage	Path	Casualties	Distance	Date
EF1	Moderate damage	1.1 mi × 175 yd	None	22 mi	Jun 17, 2025
EF0	Light damage	0.5 mi × 150 yd	None	19 mi	Aug 8, 2024
EF0	Light damage	0.5 mi × 100 yd	None	51 mi	Aug 8, 2024
EF1	Moderate damage	4.3 mi × 100 yd	None	54 mi	Aug 8, 2024
EF1	Moderate damage	15.2 mi × 150 yd	0 dead, 5 hurt	58 mi	Jun 5, 2024
EF1	Moderate damage	8.8 mi × 150 yd	None	53 mi	Jun 5, 2024
EF0	Light damage	1.1 mi × 125 yd	None	48 mi	Jun 5, 2024
EF0	Light damage	0.6 mi × 50 yd	None	26 mi	Jun 5, 2024
EF0	Light damage	1.3 mi × 130 yd	None	27 mi	Jun 5, 2024
EF0	Light damage	1.7 mi × 110 yd	None	29 mi	Jun 5, 2024
EF0	Light damage	0.9 mi × 65 yd	None	32 mi	Jun 5, 2024
EF0	Light damage	0.2 mi × 100 yd	None	66 mi	Aug 12, 2023
EF1	Moderate damage	0.3 mi × 100 yd	None	70 mi	Aug 12, 2023
EF1	Moderate damage	2.1 mi × 50 yd	None	91 mi	Jul 2, 2023
EF1	Moderate damage	1.5 mi × 150 yd	None	87 mi	Jul 2, 2023
EF1	Moderate damage	0.6 mi × 200 yd	None	78 mi	Jul 2, 2023
EF0	Light damage	0.4 mi × 50 yd	None	54 mi	Apr 22, 2023
EF0	Light damage	0.3 mi × 50 yd	None	57 mi	Jul 12, 2022
EF0	Light damage	0.4 mi × 30 yd	None	61 mi	Jul 12, 2022
EF0	Light damage	0.2 mi × 125 yd	None	49 mi	May 27, 2022
EF0	Light damage	0.2 mi × 125 yd	None	64 mi	May 27, 2022
EF0	Light damage	0.3 mi × 185 yd	None	17 mi	May 27, 2022
EF1	Moderate damage	0.7 mi × 30 yd	None	83 mi	Sep 8, 2021
EF0	Light damage	0.6 mi × 75 yd	None	48 mi	Aug 18, 2021
EF0	Light damage	0.1 mi × 15 yd	None	67 mi	Jul 29, 2021
EF0	Light damage	0.2 mi × 75 yd	None	50 mi	May 3, 2021
EF0	Light damage	0.6 mi × 150 yd	None	47 mi	May 3, 2021
EF0	Light damage	0.8 mi × 200 yd	None	42 mi	May 3, 2021
EF1	Moderate damage	1.8 mi × 125 yd	0 dead, 1 hurt	34 mi	May 3, 2021
EF1	Moderate damage	0.4 mi × 75 yd	None	47 mi	Apr 13, 2020
EF1	Moderate damage	10.3 mi × 100 yd	None	51 mi	Feb 7, 2020
EF1	Moderate damage	6.7 mi × 150 yd	None	48 mi	Feb 7, 2020
EF0	Light damage	2.1 mi × 75 yd	None	56 mi	Feb 7, 2020
EF1	Moderate damage	1.1 mi × 150 yd	None	50 mi	Feb 7, 2020
EF0	Light damage	3.4 mi × 250 yd	None	52 mi	Feb 7, 2020
EF1	Moderate damage	0.3 mi × 50 yd	None	82 mi	Jun 16, 2019
EF1	Moderate damage	4.5 mi × 100 yd	None	62 mi	May 30, 2019
EF0	Light damage	6.5 mi × 75 yd	None	42 mi	May 30, 2019
EF1	Moderate damage	0.7 mi × 50 yd	None	23 mi	May 29, 2019
EF1	Moderate damage	4.9 mi × 300 yd	None	63 mi	May 29, 2019
EF0	Light damage	1.6 mi × 300 yd	None	64 mi	May 23, 2019
EF2	Considerable damage	4.9 mi × 200 yd	None	53 mi	Apr 19, 2019
EF1	Moderate damage	1.3 mi × 350 yd	None	42 mi	Apr 19, 2019
EF1	Moderate damage	5.4 mi × 350 yd	None	32 mi	Apr 19, 2019
EF2	Considerable damage	2.9 mi × 75 yd	None	9 mi	Apr 19, 2019
EF1	Moderate damage	1.5 mi × 75 yd	None	14 mi	Apr 19, 2019
EF2	Considerable damage	4.9 mi × 400 yd	None	52 mi	Nov 2, 2018
EF1	Moderate damage	0.6 mi × 200 yd	None	52 mi	Nov 2, 2018
EF1	Moderate damage	0.5 mi × 150 yd	None	60 mi	Jun 13, 2018
EF0	Light damage	0.5 mi × 100 yd	None	40 mi	May 13, 2018
EF1	Moderate damage	0.3 mi × 100 yd	None	56 mi	May 13, 2018
EF1	Moderate damage	5.5 mi × 200 yd	None	68 mi	Aug 12, 2017
EF1	Moderate damage	1.2 mi × 200 yd	None	12 mi	Aug 4, 2017
EF0	Light damage	0.3 mi × 30 yd	None	35 mi	Jul 5, 2017
EF0	Light damage	0.2 mi × 100 yd	None	73 mi	Jun 19, 2017
EF0	Light damage	0.5 mi × 25 yd	None	44 mi	May 30, 2017
EF1	Moderate damage	1.1 mi × 100 yd	0 dead, 1 hurt	83 mi	May 1, 2017
EF0	Light damage	12.6 mi × 500 yd	None	55 mi	Jun 21, 2016
EF0	Light damage	0.1 mi × 50 yd	None	22 mi	Jun 16, 2016
EF1	Moderate damage	0.2 mi × 100 yd	None	89 mi	Aug 20, 2015
EF0	Light damage	1.5 mi × 75 yd	None	45 mi	Jun 20, 2015
EF0	Light damage	1 mi × 40 yd	None	70 mi	Apr 20, 2015
EF0	Light damage	0.1 mi × 50 yd	None	31 mi	Jul 13, 2014
EF1	Moderate damage	11 mi × 100 yd	None	29 mi	Jun 11, 2014
EF1	Moderate damage	1 mi × 100 yd	None	24 mi	Jun 8, 2014
EF1	Moderate damage	1 mi × 75 yd	None	69 mi	Jun 27, 2013
EF1	Moderate damage	3 mi × 50 yd	None	36 mi	Jun 27, 2013
EF0	Light damage	20.1 mi × 150 yd	None	60 mi	Jun 13, 2013
EF0	Light damage	5.6 mi × 100 yd	None	11 mi	Aug 26, 2012
EF1	Moderate damage	1.1 mi × 175 yd	None	24 mi	Jun 1, 2012
EF0	Light damage	1.5 mi × 75 yd	None	43 mi	Jun 1, 2012
EF0	Light damage	0.5 mi × 75 yd	None	55 mi	Jun 1, 2012
EF1	Moderate damage	2.1 mi × 200 yd	None	53 mi	Jun 1, 2012
EF0	Light damage	0.4 mi × 100 yd	None	53 mi	Jun 1, 2012
EF0	Light damage	0.6 mi × 50 yd	None	55 mi	Jun 1, 2012
EF0	Light damage	0.6 mi × 150 yd	None	53 mi	Jun 1, 2012
EF1	Moderate damage	2.7 mi × 100 yd	None	37 mi	May 27, 2011
EF1	Moderate damage	3.7 mi × 300 yd	None	33 mi	May 27, 2011
EF1	Moderate damage	2.6 mi × 100 yd	None	57 mi	May 26, 2011
EF1	Moderate damage	0.1 mi × 25 yd	None	17 mi	May 26, 2011
EF2	Considerable damage	4.7 mi × 250 yd	None	71 mi	May 23, 2011
EF1	Moderate damage	2.1 mi × 200 yd	None	13 mi	May 17, 2011
EF0	Light damage	1.1 mi × 50 yd	None	26 mi	May 17, 2011
EF0	Light damage	0.8 mi × 50 yd	None	53 mi	Apr 28, 2011
EF0	Light damage	2.9 mi × 175 yd	None	58 mi	Apr 28, 2011
EF0	Light damage	1.4 mi × 175 yd	None	59 mi	Apr 28, 2011
EF1	Moderate damage	8.5 mi × 100 yd	None	44 mi	Apr 28, 2011
EF1	Moderate damage	2.9 mi × 50 yd	None	30 mi	Apr 28, 2011
EF0	Light damage	0.6 mi × 75 yd	None	32 mi	Apr 28, 2011
EF0	Light damage	0.6 mi × 75 yd	None	36 mi	Apr 28, 2011
EF0	Light damage	2 mi × 75 yd	None	47 mi	Apr 16, 2011
EF1	Moderate damage	2.2 mi × 50 yd	None	50 mi	Apr 16, 2011
EF1	Moderate damage	1.3 mi × 50 yd	None	49 mi	Apr 16, 2011
EF1	Moderate damage	4.4 mi × 50 yd	None	46 mi	Apr 16, 2011
EF1	Moderate damage	1.2 mi × 50 yd	None	45 mi	Apr 16, 2011
EF0	Light damage	4.1 mi × 50 yd	None	51 mi	Apr 16, 2011
EF0	Light damage	0.2 mi × 440 yd	None	47 mi	Aug 12, 2010
EF1	Moderate damage	2.6 mi × 350 yd	None	45 mi	Jul 31, 2009
EF1	Moderate damage	2.6 mi × 125 yd	None	44 mi	Jul 31, 2009
EF0	Light damage	0.8 mi × 50 yd	None	22 mi	Jul 29, 2009
EF0	Light damage	5.3 mi × 100 yd	None	41 mi	Jul 29, 2009
EF0	Light damage	0.5 mi × 100 yd	None	36 mi	Jun 4, 2008
EF1	Moderate damage	0.5 mi × 100 yd	None	51 mi	Jun 4, 2008
EF0	Light damage	0.5 mi × 40 yd	None	56 mi	Apr 20, 2008
EF1	Moderate damage	1.5 mi × 400 yd	None	84 mi	Aug 7, 2007
EF1	Moderate damage	3 mi × 100 yd	None	58 mi	Sep 28, 2006
EF1	Moderate damage	0.5 mi × 100 yd	None	53 mi	Aug 31, 2005
EF1	Moderate damage	3 mi × 50 yd	None	34 mi	Aug 30, 2005
EF1	Moderate damage	7 mi × 300 yd	None	40 mi	Aug 30, 2005
EF1	Moderate damage	3 mi × 200 yd	None	34 mi	Aug 30, 2005
EF2	Considerable damage	2 mi × 125 yd	None	53 mi	Sep 18, 2004
EF1	Moderate damage	1 mi × 100 yd	None	42 mi	Sep 18, 2004
EF1	Moderate damage	4.5 mi × 100 yd	None	64 mi	Sep 17, 2004
EF1	Moderate damage	1 mi × 75 yd	None	62 mi	Sep 17, 2004
EF1	Moderate damage	2 mi × 50 yd	None	35 mi	Sep 17, 2004
EF1	Moderate damage	2.3 mi × 50 yd	None	33 mi	Sep 17, 2004
EF0	Light damage	0.5 mi × 100 yd	None	12 mi	Sep 17, 2004
EF1	Moderate damage	3.5 mi × 100 yd	None	30 mi	Sep 17, 2004
EF1	Moderate damage	1.5 mi × 100 yd	None	25 mi	Sep 17, 2004
EF2	Considerable damage	3 mi × 200 yd	None	26 mi	Sep 17, 2004
EF2	Considerable damage	2 mi × 100 yd	0 dead, 6 hurt	30 mi	Sep 17, 2004
EF1	Moderate damage	2 mi × 100 yd	None	35 mi	Sep 17, 2004
EF1	Moderate damage	2.5 mi × 50 yd	None	8 mi	Sep 17, 2004
EF1	Moderate damage	2 mi × 30 yd	None	9 mi	Sep 17, 2004
EF1	Moderate damage	7 mi × 100 yd	None	37 mi	Sep 17, 2004
EF0	Light damage	3 mi × 100 yd	None	14 mi	Sep 17, 2004
EF1	Moderate damage	3 mi × 150 yd	None	35 mi	Sep 17, 2004
EF1	Moderate damage	9 mi × 250 yd	0 dead, 2 hurt	56 mi	Sep 17, 2004
EF1	Moderate damage	0.5 mi × 40 yd	None	16 mi	Sep 17, 2004
EF1	Moderate damage	12 mi × 200 yd	None	52 mi	Sep 17, 2004
EF2	Considerable damage	5 mi × 125 yd	None	45 mi	Sep 17, 2004
EF1	Moderate damage	2.5 mi × 125 yd	None	43 mi	Aug 4, 2004
EF1	Moderate damage	4.2 mi × 150 yd	None	38 mi	Jun 14, 2004
EF0	Light damage	0.5 mi × 50 yd	None	39 mi	May 25, 2004
EF0	Light damage	0.5 mi × 50 yd	None	23 mi	May 25, 2004
EF1	Moderate damage	1.5 mi × 100 yd	None	18 mi	May 25, 2004
EF0	Light damage	3 mi × 1 yd	None	27 mi	May 21, 2004
EF1	Moderate damage	10 mi × 75 yd	None	53 mi	Nov 5, 2003
EF0	Light damage	4 mi × 75 yd	None	51 mi	Nov 5, 2003
EF0	Light damage	5 mi × 75 yd	None	51 mi	Nov 5, 2003
EF1	Moderate damage	3 mi × 200 yd	None	66 mi	Jul 21, 2003
EF0	Light damage	4 mi × 75 yd	None	39 mi	Jul 9, 2003
EF0	Light damage	2 mi × 50 yd	None	38 mi	Jun 6, 2002
EF1	Moderate damage	2 mi × 100 yd	0 dead, 1 hurt	86 mi	Apr 28, 2002
EF1	Moderate damage	3.5 mi × 70 yd	None	65 mi	May 27, 2001
EF1	Moderate damage	1.5 mi × 100 yd	None	54 mi	May 27, 2001
EF1	Moderate damage	4 mi × 100 yd	None	56 mi	May 27, 2001
EF1	Moderate damage	1 mi × 30 yd	None	68 mi	Jun 21, 2000
EF0	Light damage	0.2 mi × 30 yd	None	50 mi	Jun 21, 2000
EF1	Moderate damage	1.5 mi × 60 yd	None	28 mi	Aug 26, 1999
EF1	Moderate damage	0.2 mi × 40 yd	None	44 mi	Aug 20, 1999
EF1	Moderate damage	3 mi × 50 yd	None	35 mi	Aug 14, 1999
EF0	Light damage	5 mi × 100 yd	None	45 mi	Mar 3, 1999
EF0	Light damage	2 mi × 20 yd	None	33 mi	Jan 18, 1999
EF1	Moderate damage	7 mi × 100 yd	None	68 mi	Sep 27, 1998
EF0	Light damage	0.5 mi × 75 yd	None	39 mi	Jul 30, 1998
EF1	Moderate damage	1 mi × 150 yd	None	34 mi	Jul 30, 1998
EF1	Moderate damage	0.2 mi × 70 yd	None	53 mi	Jun 30, 1998
EF0	Light damage	5 mi × 50 yd	None	69 mi	Jun 30, 1998
EF0	Light damage	1 mi × 75 yd	None	14 mi	Jun 19, 1998
EF0	Light damage	0.5 mi × 50 yd	None	39 mi	Jun 16, 1998
EF1	Moderate damage	2 mi × 75 yd	None	13 mi	Jun 16, 1998
EF1	Moderate damage	5 mi × 100 yd	None	17 mi	Jun 16, 1998
EF1	Moderate damage	3 mi × 200 yd	0 dead, 1 hurt	20 mi	Jun 16, 1998
EF1	Moderate damage	1 mi × 150 yd	None	24 mi	Jun 16, 1998
EF1	Moderate damage	0.2 mi × 100 yd	None	63 mi	Jun 16, 1998
EF0	Light damage	0.5 mi × 75 yd	None	40 mi	Jun 16, 1998
EF0	Light damage	1 mi × 50 yd	None	35 mi	Jun 16, 1998
EF1	Moderate damage	2.5 mi × 100 yd	None	39 mi	Jun 16, 1998
EF1	Moderate damage	5 mi × 150 yd	0 dead, 5 hurt	60 mi	Jun 2, 1998
EF0	Light damage	1 mi × 50 yd	None	51 mi	Jun 2, 1998
EF0	Light damage	0.5 mi × 50 yd	None	45 mi	Jun 2, 1998
EF4	Devastating damage	8 mi × 250 yd	0 dead, 5 hurt	55 mi	Jun 2, 1998
EF2	Considerable damage	2.5 mi × 700 yd	None	55 mi	Jun 2, 1998
EF0	Light damage	0.5 mi × 67 yd	None	77 mi	Jun 2, 1998
EF1	Moderate damage	8 mi × 150 yd	None	46 mi	Jun 2, 1998
EF1	Moderate damage	1 mi × 100 yd	None	43 mi	Jun 2, 1998
EF0	Light damage	0.5 mi × 50 yd	None	44 mi	Jun 2, 1998
EF1	Moderate damage	1 mi × 50 yd	None	52 mi	Jun 2, 1998
EF1	Moderate damage	4 mi × 150 yd	None	63 mi	Jun 2, 1998
EF0	Light damage	0.2 mi × 50 yd	None	75 mi	Jun 2, 1998
EF0	Light damage	2 mi × 440 yd	None	78 mi	May 29, 1998
EF1	Moderate damage	1.5 mi × 100 yd	None	39 mi	Apr 1, 1998
EF0	Light damage	2 mi × 15 yd	None	11 mi	Jun 18, 1997
EF0	Light damage	4 mi × 30 yd	None	55 mi	Jun 18, 1997
EF0	Light damage	0.3 mi × 25 yd	None	48 mi	Jun 18, 1997
EF0	Light damage	3 mi × 30 yd	None	56 mi	Jun 18, 1997
EF1	Moderate damage	0.4 mi × 30 yd	None	58 mi	Jun 18, 1997
EF0	Light damage	4 mi × 550 yd	None	73 mi	Nov 8, 1996
EF1	Moderate damage	1 mi × 50 yd	None	61 mi	Nov 8, 1996
EF1	Moderate damage	15 mi × 150 yd	0 dead, 1 hurt	35 mi	Nov 8, 1996
EF0	Light damage	0.5 mi × 75 yd	None	48 mi	Sep 28, 1996
EF1	Moderate damage	0.8 mi × 70 yd	None	47 mi	Sep 6, 1996
EF1	Moderate damage	3 mi × 50 yd	None	28 mi	Jul 30, 1996
EF1	Moderate damage	3 mi × 440 yd	None	28 mi	Jul 30, 1996
EF0	Light damage	1 mi × 50 yd	None	60 mi	Jul 19, 1996
EF0	Light damage	1 mi × 30 yd	None	59 mi	Jul 19, 1996
EF1	Moderate damage	0.5 mi × 150 yd	None	47 mi	Jul 19, 1996
EF1	Moderate damage	4 mi × 50 yd	None	40 mi	Jul 19, 1996
EF1	Moderate damage	2.2 mi × 200 yd	None	37 mi	Jul 19, 1996
EF2	Considerable damage	2 mi × 125 yd	None	32 mi	Jul 19, 1996
EF0	Light damage	2 mi × 75 yd	None	20 mi	Jul 19, 1996
EF1	Moderate damage	1 mi × 150 yd	None	33 mi	Jul 19, 1996
EF1	Moderate damage	3 mi × 50 yd	None	20 mi	Jul 19, 1996
EF0	Light damage	2 mi × 50 yd	None	14 mi	Jul 19, 1996
EF0	Light damage	5 mi × 50 yd	None	32 mi	Jul 19, 1996
EF2	Considerable damage	6 mi × 100 yd	None	67 mi	Jul 19, 1996
EF1	Moderate damage	1.5 mi × 880 yd	None	56 mi	Jul 19, 1996
EF2	Considerable damage	8.4 mi × 200 yd	None	72 mi	Jul 19, 1996
EF1	Moderate damage	10 mi × 200 yd	None	82 mi	Jul 19, 1996
EF2	Considerable damage	6.5 mi × 200 yd	0 dead, 3 hurt	93 mi	Jul 19, 1996
EF0	Light damage	2.5 mi × 100 yd	None	94 mi	Jul 19, 1996
EF1	Moderate damage	5 mi × 50 yd	None	29 mi	Jun 24, 1996
EF1	Moderate damage	1 mi × 65 yd	None	48 mi	Jun 4, 1996
EF0	Light damage	1 mi × 25 yd	None	50 mi	Oct 14, 1995
EF1	Moderate damage	0.4 mi × 75 yd	None	61 mi	Sep 22, 1995
EF0	Light damage	0.2 mi × 30 yd	None	78 mi	Apr 16, 1993
EF1	Moderate damage	1.7 mi × 60 yd	None	51 mi	Apr 16, 1993
EF1	Moderate damage	4.5 mi × 73 yd	0 dead, 4 hurt	78 mi	Jul 17, 1992
EF0	Light damage	0.6 mi × 10 yd	None	7 mi	Jun 19, 1992
EF1	Moderate damage	1 mi × 30 yd	None	26 mi	Apr 24, 1992
EF2	Considerable damage	4 mi × 330 yd	0 dead, 3 hurt	60 mi	Sep 18, 1991
EF1	Moderate damage	0.8 mi × 73 yd	None	65 mi	Aug 20, 1991
EF0	Light damage	3 mi × 20 yd	None	51 mi	Apr 9, 1991
EF1	Moderate damage	0.4 mi × 20 yd	0 dead, 3 hurt	54 mi	Apr 9, 1991
EF1	Moderate damage	1 mi × 100 yd	None	70 mi	Apr 9, 1991
EF1	Moderate damage	0.5 mi × 50 yd	None	33 mi	Apr 9, 1991
EF0	Light damage	0.5 mi × 60 yd	None	62 mi	Apr 9, 1991
EF1	Moderate damage	0.5 mi × 100 yd	None	40 mi	Apr 9, 1991
EF1	Moderate damage	1 mi × 100 yd	None	33 mi	Apr 9, 1991
EF1	Moderate damage	0.5 mi × 50 yd	None	58 mi	Apr 9, 1991
EF1	Moderate damage	2 mi × 100 yd	None	63 mi	Apr 9, 1991
EF1	Moderate damage	1 mi × 100 yd	0 dead, 1 hurt	71 mi	Oct 18, 1990
EF1	Moderate damage	0.5 mi × 33 yd	None	30 mi	May 13, 1990
EF1	Moderate damage	3 mi × 350 yd	None	68 mi	Feb 16, 1990
EF2	Considerable damage	3.5 mi × 1230 yd	None	57 mi	Nov 20, 1989
EF2	Considerable damage	9 mi × 50 yd	0 dead, 3 hurt	39 mi	Nov 16, 1989
EF1	Moderate damage	7 mi × 13 yd	None	43 mi	Jun 24, 1989
EF1	Moderate damage	1 mi × 23 yd	None	19 mi	Jun 20, 1989
EF2	Considerable damage	2 mi × 23 yd	0 dead, 1 hurt	46 mi	Jun 20, 1989
EF1	Moderate damage	1 mi × 20 yd	None	48 mi	Nov 5, 1988
EF0	Light damage	0.2 mi × 10 yd	None	43 mi	Jun 30, 1987
EF1	Moderate damage	1 mi × 50 yd	None	54 mi	Aug 2, 1986
EF1	Moderate damage	1 mi × 50 yd	None	54 mi	Aug 2, 1986
EF1	Moderate damage	3 mi × 20 yd	None	55 mi	Jul 31, 1985
EF1	Moderate damage	1 mi × 80 yd	None	41 mi	Jun 16, 1985
EF0	Light damage	6 mi × 27 yd	None	80 mi	May 31, 1985
EF4	Devastating damage	11 mi × 350 yd	0 dead, 5 hurt	79 mi	May 31, 1985
EF1	Moderate damage	0.2 mi × 10 yd	None	58 mi	Jul 21, 1983
EF3	Severe damage	1 mi × 37 yd	None	39 mi	May 22, 1983
EF3	Severe damage	1 mi × 37 yd	None	37 mi	May 22, 1983
EF1	Moderate damage	0.2 mi × 17 yd	None	26 mi	May 30, 1982
EF1	Moderate damage	N/A	None	66 mi	Jul 26, 1981
EF1	Moderate damage	N/A	None	53 mi	Jul 26, 1981
EF1	Moderate damage	N/A	None	65 mi	Jun 22, 1981
EF0	Light damage	N/A	None	70 mi	Jun 9, 1980
EF2	Considerable damage	7.4 mi × 33 yd	None	70 mi	Jun 9, 1980
EF2	Considerable damage	3.3 mi × 33 yd	None	51 mi	Jun 7, 1980
EF2	Considerable damage	2.3 mi × 800 yd	None	49 mi	Jun 7, 1980
EF3	Severe damage	1.5 mi × 400 yd	None	50 mi	Jun 7, 1980
EF2	Considerable damage	2.7 mi × 100 yd	None	57 mi	Jun 3, 1980
EF2	Considerable damage	N/A	None	72 mi	Apr 9, 1980
EF1	Moderate damage	7.8 mi × 33 yd	0 dead, 1 hurt	27 mi	Oct 2, 1979
EF2	Considerable damage	0.5 mi × 30 yd	None	52 mi	Sep 5, 1979
EF2	Considerable damage	0.5 mi × 50 yd	0 dead, 2 hurt	53 mi	Sep 5, 1979
EF0	Light damage	0.3 mi × 10 yd	None	10 mi	Sep 5, 1979
EF1	Moderate damage	0.5 mi × 17 yd	None	44 mi	Sep 5, 1979
EF0	Light damage	0.1 mi × 33 yd	None	26 mi	Jul 20, 1979
EF2	Considerable damage	3.3 mi × 20 yd	None	48 mi	Aug 28, 1978
EF2	Considerable damage	0.8 mi × 40 yd	None	58 mi	Jul 31, 1978
EF2	Considerable damage	1.5 mi × 100 yd	None	42 mi	Jul 31, 1978
EF0	Light damage	N/A	None	49 mi	Jun 27, 1978
EF0	Light damage	N/A	None	89 mi	Jun 7, 1978
EF1	Moderate damage	0.3 mi × 40 yd	None	64 mi	Jul 29, 1976
EF1	Moderate damage	1.9 mi × 100 yd	None	66 mi	Jun 28, 1976
EF0	Light damage	3 mi × 70 yd	None	51 mi	Mar 21, 1976
EF1	Moderate damage	4.9 mi × 90 yd	None	51 mi	Mar 21, 1976
EF2	Considerable damage	1 mi × 50 yd	None	38 mi	Mar 21, 1976
EF0	Light damage	1 mi × 50 yd	None	23 mi	Mar 21, 1976
EF0	Light damage	0.5 mi × 30 yd	None	50 mi	Mar 21, 1976

📈 Historical Trends

Tornado activity near Mercersburg over 47 years

280

Total tornados on record

5.6

Average per year

EF4

Strongest recorded

Jun

Peak month

EF Scale Distribution

EF0

103

EF1

144

EF2

EF3

EF4

EF5

Yearly Tornado Count

1976 2025

Strongest Tornados on Record

EF4 VENANGO, PE May 31, 1985

11 mi path 5 injured

EF4 ALLEGANY, MA Jun 2, 1998

8 mi path 5 injured

EF3 ADAMS, PE Jun 7, 1980

1.5 mi path

EF3 FREDERICK, MA May 22, 1983

1 mi path

EF3 CARROLL, MA May 22, 1983

1 mi path

📅 Tornado Season

When tornados are most likely near you

⚡

Active Tornado Season

Tornado season is active. Mercersburg sees the most tornado activity in Jun. Stay alert and have your shelter plan ready.

US Tornado Activity by Month

Jan

Feb

Mar

Apr

10%

May

18%

PEAK

Jun

16%

Jul

12%

Aug

Sep

Oct

Nov

Dec

Current month Peak for Mercersburg

🛡️ Tornado Safety

What to know before, during, and after a tornado

⚠️ Tornado Watch

Meaning: Conditions are favorable for tornado development

Be prepared to take shelter. Stay alert for changing conditions.

🌪️ Tornado Warning

Meaning: A tornado has been spotted or detected on radar

TAKE COVER IMMEDIATELY in your nearest safe shelter.

⚠️ Step 1

Tornado Watch — Be Prepared

Conditions are favorable for tornados. Monitor weather alerts, charge your phone, and review your shelter plan. Move vehicles into garages if possible.

🌪️ Step 2

Tornado Warning — Take Cover NOW

A tornado has been sighted or indicated by radar. Move immediately to an interior room on the lowest floor (basement, bathroom, closet). Get under sturdy furniture. Stay away from windows.

🔍 Step 3

After a Tornado

Stay in your shelter until the warning expires. Check for injuries, avoid downed power lines, and watch for gas leaks. Document damage for insurance before cleanup.

Where to Shelter

✓ Best: Underground shelter or basement

✓ Good: Interior room on lowest floor

✓ Acceptable: Bathroom or closet (no exterior walls)

✓ If driving: Pull over, get below road level in a ditch

✗ NEVER: Stay in a mobile home — leave for sturdy building

✗ NEVER: Shelter under a highway overpass

📍 Nearby Tornado Monitoring

Cities near Mercersburg with live tracking