Union County tornado history

12 tornadoes touched Union County, Pennsylvania between 1950 and 2025 — about 0.2 a year. The strongest was rated F3 (May 31, 1985). Tornadoes here killed 6 and injured 60 people.

12tornadoes since 1950

F3strongest rating

6killed · 60 injured

19 milongest path · 1985

(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F03

(E)F18

(E)F20

(E)F31

(E)F40

(E)F50

By month

JFMAMJJASOND

Peak month: July.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

Date	Rating	Path	Width	Injured	Killed
May 31, 1985	F3	19 mi	910 yd	60	6
Sep 27, 1998	F1	2.5 mi	400 yd	0	0
Sep 4, 2001	F1	2.5 mi	300 yd	0	0
Jul 2, 2023	EF1	2.4 mi	150 yd	0	0
Jul 2, 2023	EF1	2.1 mi	50 yd	0	0
Jul 2, 2023	EF1	1.5 mi	150 yd	0	0
Apr 14, 2019	EF1	1.4 mi	150 yd	0	0
May 23, 2011	EF1	1.2 mi	100 yd	0	0
Aug 20, 2015	EF1	0.2 mi	100 yd	0	0
Jul 18, 1997	F0	2.3 mi	100 yd	0	0
Jul 18, 1997	F0	1 mi	440 yd	0	0
Jul 11, 2009	EF0	1 mi	50 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured	Killed
Jul 2, 2023	EF1	1.5 mi	150 yd	0	0
Jul 2, 2023	EF1	2.1 mi	50 yd	0	0
Jul 2, 2023	EF1	2.4 mi	150 yd	0	0
Apr 14, 2019	EF1	1.4 mi	150 yd	0	0
Aug 20, 2015	EF1	0.2 mi	100 yd	0	0
May 23, 2011	EF1	1.2 mi	100 yd	0	0
Jul 11, 2009	EF0	1 mi	50 yd	0	0
Sep 4, 2001	F1	2.5 mi	300 yd	0	0
Sep 27, 1998	F1	2.5 mi	400 yd	0	0
Jul 18, 1997	F0	1 mi	440 yd	0	0
Jul 18, 1997	F0	2.3 mi	100 yd	0	0
May 31, 1985	F3	19 mi	910 yd	60	6

Deadliest: May 31, 1985, F3, 6 killed.

Nearby counties

Snyder County, PA10 Northumberland County, PA14 Montour County, PA4 Lycoming County, PA29 Columbia County, PA9 Juniata County, PA7 Clinton County, PA10 Mifflin County, PA5

Questions

How many tornadoes has Union County, Pennsylvania had?

12 tornadoes touched Union County, Pennsylvania between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.2 per year.

What was the strongest tornado in Union County?

The strongest rating recorded was F3 on May 31, 1985, with a 19-mile path and 6 deaths.

When is tornado season in Union County?

Most of its tornadoes happened in July (6 of 12). Tornadoes can occur in any month, so keep alerts on year-round.

Right now: live tornado warnings map · alerts for your location. Dates link to that day’s full storm reports where available (2004 onward).