Alert archive / Pennsylvania / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Pennsylvania, 2010

490 severe thunderstorm warnings in 2010. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2010. Tap one for its archive.

Severe Thunderstorm Warnings: 490
Busiest month: July120 severe thunderstorm warnings
Busiest day: July 25, 201034 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

312 of 490 severe thunderstorm warnings covering Pennsylvania in 2010 had a qualifying storm report inside them; 520 of 634 hail, wind and damage reports fell inside a warning, on average 27 minutes after it went out.

Pennsylvania, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	490	312	36%	634	82%	27 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pittsburgh, PA: severe thunderstorm warnings	204	124	39%	290	82%	26 min
NWS Binghamton, NY: severe thunderstorm warnings	137	91	34%	214	81%	24 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	183	107	42%	252	82%	29 min
NWS State College, PA: severe thunderstorm warnings	213	131	38%	319	85%	27 min
NWS Cleveland, OH: severe thunderstorm warnings	205	143	30%	360	82%	24 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Counties	Lasted
Jan 25, 9:42 AM EST	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	63 min
Apr 8, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	34 min
Apr 8, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Centre, Clinton, Cumberland, Dauphin, Franklin and 10 more	59 min
Apr 8, 6:34 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Lycoming, Montour, Northumberland and 5 more	41 min
Apr 8, 6:35 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	40 min
Apr 8, 7:10 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	65 min
Apr 8, 7:27 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Lycoming, Montour, Northumberland and 3 more	63 min
Apr 8, 7:29 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	61 min
Apr 8, 7:40 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	65 min
Apr 8, 7:54 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	66 min
Apr 8, 8:08 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Susquehanna, Wayne	52 min
Apr 8, 8:57 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	63 min
Apr 8, 9:25 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	37 min
Apr 8, 9:56 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	28 min
Apr 16, 3:23 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Lawrence and 2 more	67 min
Apr 16, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	58 min
Apr 16, 4:03 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson, Westmoreland	57 min
Apr 16, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	49 min
Apr 16, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Centre, Clearfield, Franklin and 4 more	62 min
Apr 16, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Mifflin, Snyder, Union	56 min
Apr 16, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Centre, Cumberland, Franklin, Fulton, Huntingdon and 3 more	52 min
Apr 16, 5:27 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	48 min
Apr 16, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Lebanon, Northumberland, Perry, Schuylkill and 1 more	59 min
Apr 16, 6:06 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 2 more	69 min
Apr 16, 6:22 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	23 min
Apr 16, 6:26 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	49 min
Apr 16, 6:40 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lebanon, Northumberland, Schuylkill	65 min
Apr 16, 6:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks	61 min
Apr 16, 6:49 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	56 min
Apr 16, 7:05 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Franklin, Fulton	40 min
Apr 16, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Chester	34 min
Apr 25, 2:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Greene, Washington	49 min
Apr 25, 3:43 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	47 min
Apr 25, 3:45 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Washington, Westmoreland	45 min
Apr 25, 3:50 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	55 min
Apr 25, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	65 min
Apr 25, 4:37 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	38 min
Apr 25, 4:40 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Huntingdon	65 min
Apr 25, 4:54 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	36 min
Apr 25, 5:04 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	56 min
Apr 25, 5:22 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson, Venango	38 min
Apr 25, 5:24 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	36 min
Apr 25, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Huntingdon, Juniata, Perry	59 min
May 2, 6:15 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Franklin, Fulton	60 min
May 2, 11:05 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	25 min
May 2, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	42 min
May 2, 11:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Montgomery	43 min
May 3, 12:16 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Northampton	34 min
May 4, 3:54 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	37 min
May 4, 4:04 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	56 min
May 5, 8:50 PM EDT	Severe Thunderstorm Warning	CTP	Warren	55 min
May 5, 9:46 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	44 min
May 7, 10:03 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	57 min
May 7, 10:12 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	78 min
May 7, 10:37 PM EDT	Severe Thunderstorm Warning	CLE	Erie	38 min
May 7, 10:46 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	59 min
May 7, 11:06 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	54 min
May 7, 11:29 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	46 min
May 8, 12:08 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Forest, Venango	37 min
May 8, 12:32 AM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence	43 min
May 8, 2:22 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana	23 min
May 8, 2:40 AM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	35 min
May 13, 7:59 PM EDT	Severe Thunderstorm Warning	CLE	Erie	61 min
May 14, 4:14 AM EDT	Severe Thunderstorm Warning	PBZ	Butler, Clarion, Forest, Lawrence, Mercer, Venango	61 min
May 14, 4:40 AM EDT	Severe Thunderstorm Warning	CLE	Crawford	65 min
May 14, 5:14 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Forest, Indiana, Jefferson and 3 more	61 min
May 14, 6:04 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	41 min
May 14, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Huntingdon	41 min
May 14, 3:12 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	33 min
May 14, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon	41 min
May 14, 3:32 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	58 min
May 14, 3:52 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	53 min
May 14, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Huntingdon, Juniata, Mifflin, Perry	50 min
May 14, 4:20 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Huntingdon, Juniata, Perry	70 min
May 14, 4:24 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Perry, Schuylkill	57 min
May 14, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks	63 min
May 14, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	56 min
May 14, 5:15 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, York	45 min
May 14, 5:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	31 min
May 14, 5:41 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, York	64 min
May 14, 5:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	56 min
May 14, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Northampton	67 min
May 14, 6:00 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	75 min
May 14, 6:24 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	51 min
May 14, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery, Philadelphia	65 min
May 14, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	55 min
May 14, 7:28 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	32 min
May 14, 8:12 PM EDT	Severe Thunderstorm Warning	CTP	Centre	23 min
May 27, 2:00 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Monroe, Northampton	60 min
May 27, 3:19 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	41 min
May 27, 3:30 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	45 min
May 27, 4:16 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	45 min
May 27, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	64 min
May 27, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	54 min
May 27, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	37 min
May 27, 6:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	25 min
May 27, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	55 min
May 27, 7:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	48 min
May 27, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	34 min
May 27, 9:24 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	36 min
May 27, 10:03 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	27 min
May 27, 10:13 PM EDT	Severe Thunderstorm Warning	PHI	Chester	47 min
May 27, 10:29 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	46 min
May 27, 10:30 PM EDT	Severe Thunderstorm Warning	PHI	Chester	60 min
May 27, 10:34 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	26 min
May 27, 11:12 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	63 min
May 28, 1:04 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	41 min
May 28, 1:53 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	37 min
May 28, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	43 min
May 28, 2:51 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	39 min
May 28, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	62 min
May 28, 6:22 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	38 min
May 31, 1:33 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	27 min
May 31, 2:04 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	43 min
May 31, 2:06 PM EDT	Severe Thunderstorm Warning	CTP	McKean	54 min
May 31, 2:16 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	44 min
May 31, 2:31 PM EDT	Severe Thunderstorm Warning	CTP	Warren	59 min
May 31, 2:33 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Clarion, Mercer, Venango	57 min
May 31, 2:52 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	53 min
May 31, 2:54 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	66 min
May 31, 3:07 PM EDT	Severe Thunderstorm Warning	CTP	Warren	53 min
May 31, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria	62 min
May 31, 4:07 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	53 min
May 31, 4:11 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	64 min
May 31, 4:39 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	66 min
May 31, 4:42 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Centre, Clearfield	63 min
May 31, 4:48 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Potter	57 min
May 31, 4:55 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Huntingdon	65 min
May 31, 4:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	62 min
May 31, 5:02 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	58 min
May 31, 5:10 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	50 min
May 31, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Potter	52 min
May 31, 5:44 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	61 min
May 31, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Potter	66 min
May 31, 5:59 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	76 min
May 31, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	59 min
May 31, 7:12 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, York	63 min
May 31, 8:36 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Northumberland, Perry, Schuylkill, Snyder	54 min
Jun 1, 1:41 AM EDT	Severe Thunderstorm Warning	BGM	Bradford	64 min
Jun 2, 3:14 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	61 min
Jun 2, 3:24 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	51 min
Jun 2, 6:18 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	42 min
Jun 2, 6:29 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	46 min
Jun 2, 7:13 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	47 min
Jun 2, 7:52 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence	38 min
Jun 2, 7:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Westmoreland	64 min
Jun 2, 8:47 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	43 min
Jun 2, 10:03 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	57 min
Jun 3, 7:25 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	51 min
Jun 3, 7:49 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	56 min
Jun 3, 8:32 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	58 min
Jun 4, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Chester	76 min
Jun 4, 3:17 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	42 min
Jun 4, 4:38 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	37 min
Jun 4, 4:50 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	55 min
Jun 4, 4:54 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	51 min
Jun 4, 5:12 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	48 min
Jun 4, 5:42 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Fulton, Huntingdon	63 min
Jun 4, 5:53 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	67 min
Jun 4, 5:58 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	62 min
Jun 4, 6:33 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	57 min
Jun 4, 6:36 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	54 min
Jun 4, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	63 min
Jun 4, 7:21 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	39 min
Jun 4, 7:51 PM EDT	Severe Thunderstorm Warning	PBZ	Forest	39 min
Jun 4, 7:58 PM EDT	Severe Thunderstorm Warning	CTP	York	32 min
Jun 4, 8:07 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	58 min
Jun 4, 8:25 PM EDT	Severe Thunderstorm Warning	PBZ	Forest	17 min
Jun 4, 8:46 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, York	44 min
Jun 4, 9:52 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	53 min
Jun 5, 2:27 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Lawrence, Mercer, Venango	48 min
Jun 5, 2:59 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	46 min
Jun 5, 4:20 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	55 min
Jun 5, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	64 min
Jun 5, 5:07 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington	38 min
Jun 5, 5:14 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	46 min
Jun 5, 5:38 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	67 min
Jun 6, 2:06 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Potter, Warren	69 min
Jun 6, 2:40 AM EDT	Severe Thunderstorm Warning	CLE	Erie	50 min
Jun 6, 6:16 AM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	44 min
Jun 6, 6:40 AM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	65 min
Jun 6, 7:12 AM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson, Mercer, Venango	48 min
Jun 6, 7:15 AM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	45 min
Jun 6, 7:53 AM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Tioga	67 min
Jun 6, 8:41 AM EDT	Severe Thunderstorm Warning	BGM	Bradford	49 min
Jun 6, 8:54 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	21 min
Jun 6, 9:23 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Clinton	67 min
Jun 6, 9:34 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Columbia, Lycoming and 2 more	86 min
Jun 6, 9:41 AM EDT	Severe Thunderstorm Warning	BGM	Bradford	34 min
Jun 6, 11:07 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	53 min
Jun 6, 11:48 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Snyder, Union	57 min
Jun 6, 12:50 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	25 min
Jun 6, 12:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	65 min
Jun 6, 1:16 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	44 min
Jun 6, 1:25 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	65 min
Jun 12, 5:32 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Perry	58 min
Jun 12, 6:36 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	39 min
Jun 19, 4:19 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	54 min
Jun 22, 3:54 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	66 min
Jun 22, 4:32 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	73 min
Jun 22, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	71 min
Jun 22, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	34 min
Jun 22, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Chester	49 min
Jun 22, 6:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	46 min
Jun 23, 3:54 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	36 min
Jun 23, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	33 min
Jun 23, 4:32 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	58 min
Jun 23, 4:35 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	55 min
Jun 23, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	54 min
Jun 23, 5:29 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence, Washington	61 min
Jun 23, 5:32 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	43 min
Jun 23, 5:34 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	56 min
Jun 23, 5:40 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	65 min
Jun 23, 6:08 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	52 min
Jun 23, 6:10 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	65 min
Jun 23, 6:27 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	63 min
Jun 23, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	33 min
Jun 23, 6:45 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 2 more	60 min
Jun 23, 7:34 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Fulton, Huntingdon	56 min
Jun 23, 11:04 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	56 min
Jun 23, 11:53 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	52 min
Jun 24, 12:19 AM EDT	Severe Thunderstorm Warning	CLE	Erie	56 min
Jun 24, 1:14 AM EDT	Severe Thunderstorm Warning	CLE	Erie	61 min
Jun 24, 11:58 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	47 min
Jun 24, 12:07 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	53 min
Jun 24, 12:20 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	42 min
Jun 24, 12:25 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	50 min
Jun 24, 1:21 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Perry	39 min
Jun 24, 1:29 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry and 1 more	61 min
Jun 24, 1:55 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	50 min
Jun 24, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	Berks	66 min
Jun 24, 2:02 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	58 min
Jun 24, 2:27 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	48 min
Jun 24, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	59 min
Jun 24, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	62 min
Jun 24, 2:56 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	64 min
Jun 24, 3:03 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Lackawanna, Susquehanna, Wayne, Wyoming	42 min
Jun 24, 3:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	62 min
Jun 24, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jun 24, 3:37 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	38 min
Jun 24, 4:09 PM EDT	Severe Thunderstorm Warning	BGM	Pike	37 min
Jun 27, 3:36 PM EDT	Severe Thunderstorm Warning	CLE	Erie	54 min
Jun 27, 4:42 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	48 min
Jun 27, 5:25 PM EDT	Severe Thunderstorm Warning	CTP	Warren	95 min
Jun 27, 6:11 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	34 min
Jun 27, 6:27 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	48 min
Jun 27, 7:09 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	51 min
Jun 27, 8:54 PM EDT	Severe Thunderstorm Warning	CTP	Warren	66 min
Jun 28, 8:25 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	65 min
Jul 12, 2:57 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Juniata, Perry	63 min
Jul 12, 3:21 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Montour, Northumberland, Snyder, Union	54 min
Jul 12, 3:36 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Northumberland, Schuylkill, York	54 min
Jul 12, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill	62 min
Jul 12, 5:14 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	76 min
Jul 12, 5:18 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	42 min
Jul 12, 5:21 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	39 min
Jul 12, 11:31 PM EDT	Severe Thunderstorm Warning	CTP	York	29 min
Jul 16, 2:13 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Perry	47 min
Jul 17, 7:30 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	48 min
Jul 17, 7:33 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	27 min
Jul 17, 7:41 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	34 min
Jul 17, 8:11 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	34 min
Jul 17, 8:37 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Lawrence, Mercer	53 min
Jul 17, 9:17 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	58 min
Jul 17, 9:46 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	44 min
Jul 17, 10:18 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	57 min
Jul 17, 10:20 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	55 min
Jul 17, 10:24 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	66 min
Jul 17, 10:29 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	57 min
Jul 17, 10:49 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, McKean, Potter	41 min
Jul 19, 9:07 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	53 min
Jul 19, 2:15 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	33 min
Jul 19, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	54 min
Jul 19, 5:37 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	23 min
Jul 19, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	66 min
Jul 19, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	53 min
Jul 19, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	56 min
Jul 20, 7:09 PM EDT	Severe Thunderstorm Warning	CTP	York	36 min
Jul 21, 12:46 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	21 min
Jul 21, 1:42 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	48 min
Jul 21, 2:36 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	26 min
Jul 21, 2:43 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	50 min
Jul 21, 3:20 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, McKean, Potter	55 min
Jul 21, 4:03 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	57 min
Jul 21, 4:20 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	55 min
Jul 21, 4:25 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	65 min
Jul 21, 4:55 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin	65 min
Jul 21, 5:06 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	54 min
Jul 21, 5:33 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Susquehanna, Wayne, Wyoming	26 min
Jul 21, 6:08 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Clinton, Elk	52 min
Jul 21, 6:10 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	65 min
Jul 21, 6:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Juniata, Northumberland, Perry, Schuylkill and 1 more	42 min
Jul 21, 6:34 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Butler, Westmoreland	26 min
Jul 21, 6:59 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	31 min
Jul 21, 7:14 PM EDT	Severe Thunderstorm Warning	CTP	Centre	46 min
Jul 21, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Juniata, Mifflin	46 min
Jul 21, 8:43 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	24 min
Jul 21, 9:06 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	24 min
Jul 21, 10:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Montgomery	65 min
Jul 21, 10:26 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	45 min
Jul 23, 3:27 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	63 min
Jul 23, 4:03 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	57 min
Jul 23, 4:49 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	56 min
Jul 23, 5:18 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	57 min
Jul 23, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	38 min
Jul 23, 5:23 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	67 min
Jul 23, 5:51 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Indiana, Jefferson	39 min
Jul 23, 5:59 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin, Snyder	37 min
Jul 23, 6:15 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	30 min
Jul 23, 7:12 PM EDT	Severe Thunderstorm Warning	BGM	Pike	35 min
Jul 23, 8:39 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	66 min
Jul 23, 9:35 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Mercer, Venango	55 min
Jul 23, 10:01 PM EDT	Severe Thunderstorm Warning	CTP	Warren	44 min
Jul 23, 10:34 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence, Mercer	56 min
Jul 23, 10:37 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean	38 min
Jul 24, 12:07 AM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	53 min
Jul 24, 3:34 PM EDT	Severe Thunderstorm Warning	CLE	Erie	41 min
Jul 24, 5:30 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Warren	90 min
Jul 24, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	65 min
Jul 24, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	63 min
Jul 24, 7:09 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Venango	51 min
Jul 24, 7:10 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	50 min
Jul 24, 7:12 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer, Venango	63 min
Jul 24, 7:21 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	33 min
Jul 24, 7:31 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	35 min
Jul 24, 7:45 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Sullivan, Tioga	60 min
Jul 24, 7:56 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	64 min
Jul 24, 7:58 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Jefferson	32 min
Jul 24, 8:11 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Lawrence, Mercer, Venango	64 min
Jul 24, 8:14 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	76 min
Jul 24, 8:14 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Jefferson	46 min
Jul 24, 8:18 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	42 min
Jul 24, 8:33 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	57 min
Jul 24, 8:35 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	40 min
Jul 24, 8:41 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Indiana, Jefferson	64 min
Jul 24, 8:50 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	55 min
Jul 24, 8:57 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Columbia, Lycoming, Montour, Northumberland and 2 more	78 min
Jul 24, 9:35 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	55 min
Jul 24, 9:45 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	29 min
Jul 24, 9:59 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	46 min
Jul 24, 10:00 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	32 min
Jul 25, 10:35 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Potter, Sullivan and 1 more	55 min
Jul 25, 11:42 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Lycoming, Potter	63 min
Jul 25, 11:50 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset	55 min
Jul 25, 11:59 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	31 min
Jul 25, 12:06 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	54 min
Jul 25, 12:08 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	52 min
Jul 25, 12:27 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	78 min
Jul 25, 12:29 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Perry	61 min
Jul 25, 12:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	46 min
Jul 25, 12:46 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 3 more	59 min
Jul 25, 1:15 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	60 min
Jul 25, 1:22 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill, Snyder, Union	38 min
Jul 25, 1:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Lebanon, York	77 min
Jul 25, 1:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	75 min
Jul 25, 1:38 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	52 min
Jul 25, 2:25 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	80 min
Jul 25, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	42 min
Jul 25, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	64 min
Jul 25, 3:10 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	80 min
Jul 25, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	57 min
Jul 25, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery, Philadelphia	79 min
Jul 28, 6:23 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	67 min
Jul 28, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	33 min
Jul 28, 7:07 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	29 min
Jul 28, 7:14 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	31 min
Jul 28, 9:11 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	49 min
Jul 29, 2:47 AM EDT	Severe Thunderstorm Warning	CTP	McKean	58 min
Jul 29, 7:30 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	31 min
Aug 4, 3:22 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	53 min
Aug 4, 3:42 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	48 min
Aug 4, 3:54 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	51 min
Aug 4, 4:17 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	58 min
Aug 4, 4:36 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Greene, Washington, Westmoreland	39 min
Aug 4, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	55 min
Aug 4, 5:09 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	66 min
Aug 4, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Somerset	53 min
Aug 4, 6:11 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	64 min
Aug 4, 6:50 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	55 min
Aug 4, 6:55 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Perry	65 min
Aug 4, 7:06 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton	20 min
Aug 4, 8:39 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	66 min
Aug 4, 9:25 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	65 min
Aug 4, 9:50 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	55 min
Aug 16, 1:20 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	55 min
Aug 16, 3:08 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	67 min
Aug 16, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	27 min
Aug 16, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, York	62 min
Aug 16, 3:33 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	57 min
Aug 16, 3:49 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	58 min
Aug 16, 4:04 PM EDT	Severe Thunderstorm Warning	PHI	Berks	56 min
Aug 16, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, York	63 min
Aug 16, 4:20 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	55 min
Aug 16, 4:30 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	46 min
Aug 16, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	74 min
Aug 16, 5:37 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	63 min
Aug 16, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Chester	55 min
Aug 16, 6:44 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	61 min
Aug 16, 9:08 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	67 min
Aug 16, 10:12 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	63 min
Aug 22, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	65 min
Aug 22, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	65 min
Sep 7, 5:45 PM EDT	Severe Thunderstorm Warning	CLE	Erie	60 min
Sep 7, 5:58 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	63 min
Sep 7, 7:26 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	33 min
Sep 7, 8:34 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	26 min
Sep 7, 9:42 PM EDT	Severe Thunderstorm Warning	CLE	Erie	30 min
Sep 13, 1:29 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wayne	61 min
Sep 13, 1:58 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	32 min
Sep 13, 2:33 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Lackawanna, Susquehanna, Wyoming	57 min
Sep 13, 2:52 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Susquehanna, Wayne	53 min
Sep 13, 3:32 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne, Wyoming	58 min
Sep 13, 3:44 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	61 min
Sep 13, 3:54 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Lackawanna, Luzerne, Wyoming	66 min
Sep 13, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	52 min
Sep 13, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	55 min
Sep 13, 5:10 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	50 min
Sep 16, 4:36 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	54 min
Sep 16, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	80 min
Sep 16, 6:10 PM EDT	Severe Thunderstorm Warning	CLE	Erie	50 min
Sep 16, 6:33 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	42 min
Sep 16, 6:40 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	65 min
Sep 16, 7:15 PM EDT	Severe Thunderstorm Warning	CLE	Erie	60 min
Sep 16, 9:02 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	43 min
Sep 22, 2:07 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	38 min
Sep 22, 2:24 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	66 min
Sep 22, 3:17 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton	58 min
Sep 22, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, York	56 min
Sep 22, 3:22 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Indiana, Westmoreland	53 min
Sep 22, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Tioga	55 min
Sep 22, 3:44 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	31 min
Sep 22, 3:57 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	78 min
Sep 22, 3:58 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	47 min
Sep 22, 4:00 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Montour, Northumberland, Union	60 min
Sep 22, 4:12 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Indiana, Washington, Westmoreland	48 min
Sep 22, 4:15 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	60 min
Sep 22, 4:38 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Sullivan	46 min
Sep 22, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset	70 min
Sep 22, 4:55 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	65 min
Sep 22, 4:59 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	31 min
Sep 22, 5:02 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	58 min
Sep 22, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	64 min
Sep 22, 5:37 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill, Snyder	53 min
Sep 22, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Bedford, Cumberland, Franklin, Fulton, Huntingdon and 3 more	66 min
Sep 22, 6:17 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Northumberland, Schuylkill	58 min
Sep 22, 6:18 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	42 min
Sep 22, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	67 min
Sep 22, 6:40 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	35 min
Sep 22, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 2 more	73 min
Sep 22, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Monroe, Montgomery, Northampton	53 min
Sep 22, 7:45 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	60 min
Sep 22, 8:17 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	28 min
Sep 28, 5:03 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Somerset	57 min
Sep 28, 7:23 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Franklin, Fulton, Huntingdon	67 min
Sep 28, 8:24 AM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clinton, Fulton, Huntingdon, Mifflin	66 min
Sep 28, 9:46 AM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	44 min
Sep 28, 10:05 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	55 min
Sep 28, 11:15 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	45 min
Sep 30, 8:58 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	62 min
Sep 30, 10:38 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	37 min
Sep 30, 3:14 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	46 min
Sep 30, 6:41 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill	49 min
Sep 30, 6:51 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	54 min
Oct 11, 2:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin, Union	47 min
Oct 11, 3:15 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	36 min
Oct 11, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	56 min
Oct 11, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Juniata, Lycoming, Montour, Northumberland and 4 more	57 min
Oct 11, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	73 min
Oct 11, 4:17 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Wyoming	58 min
Oct 11, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Sullivan, Tioga	77 min
Oct 11, 4:37 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	38 min
Oct 11, 4:42 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Wyoming	63 min
Oct 11, 5:06 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	54 min
Oct 11, 5:48 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	34 min
Oct 11, 5:48 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	57 min
Oct 11, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter	74 min
Oct 11, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Montour, Northumberland, Union	60 min
Oct 11, 10:04 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	56 min
Oct 26, 4:34 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence	56 min
Oct 26, 5:25 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Jefferson	50 min
Nov 17, 12:03 AM EST	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	57 min
Nov 17, 1:45 AM EST	Severe Thunderstorm Warning	CTP	Columbia, Lancaster, Lebanon, Schuylkill, York	46 min
Nov 17, 1:49 AM EST	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	56 min
Nov 17, 2:35 AM EST	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	55 min
Nov 17, 2:40 AM EST	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more	65 min
Nov 17, 3:13 AM EST	Severe Thunderstorm Warning	PHI	Bucks	62 min
Nov 17, 3:28 AM EST	Severe Thunderstorm Warning	PHI	Bucks, Carbon, Lehigh, Monroe, Northampton	62 min
Dec 1, 6:29 AM EST	Severe Thunderstorm Warning	CTP	Juniata, Northumberland, Snyder, Union	46 min
Dec 1, 11:35 AM EST	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	40 min
Dec 1, 12:12 PM EST	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Northampton, Philadelphia	63 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

27 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2009 2011

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.