Alert archive / Pennsylvania / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Pennsylvania, 2008

531 severe thunderstorm warnings in 2008. 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 2008. Tap one for its archive.

Severe Thunderstorm Warnings: 531
Busiest month: June244 severe thunderstorm warnings
Busiest day: June 16, 200850 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.

272 of 531 severe thunderstorm warnings covering Pennsylvania in 2008 had a qualifying storm report inside them; 399 of 475 hail, wind and damage reports fell inside a warning, on average 25 minutes after it went out.

Pennsylvania, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	531	272	49%	475	84%	25 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	273	120	56%	264	79%	26 min
NWS Cleveland, OH: severe thunderstorm warnings	264	140	47%	279	87%	23 min
NWS State College, PA: severe thunderstorm warnings	184	86	53%	179	84%	26 min
NWS Binghamton, NY: severe thunderstorm warnings	280	150	46%	327	87%	26 min
NWS Pittsburgh, PA: severe thunderstorm warnings	179	102	43%	169	83%	23 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 9, 2:43 AM EST	Severe Thunderstorm Warning	CLE	Crawford, Erie	92 min
Jan 9, 3:31 AM EST	Severe Thunderstorm Warning	CTP	Warren	74 min
Feb 6, 6:53 PM EST	Severe Thunderstorm Warning	CTP	Sullivan	37 min
Feb 6, 7:05 PM EST	Severe Thunderstorm Warning	BGM	Susquehanna, Wyoming	30 min
Feb 6, 7:21 PM EST	Severe Thunderstorm Warning	CTP	Clearfield	39 min
Feb 6, 7:37 PM EST	Severe Thunderstorm Warning	PHI	Monroe	23 min
Feb 6, 9:02 PM EST	Severe Thunderstorm Warning	CTP	Adams, Franklin	58 min
Feb 6, 9:50 PM EST	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	55 min
Feb 6, 9:57 PM EST	Severe Thunderstorm Warning	CTP	Adams	33 min
Feb 6, 10:19 PM EST	Severe Thunderstorm Warning	PHI	Berks	41 min
Mar 4, 9:10 PM EST	Severe Thunderstorm Warning	PBZ	Fayette	35 min
Mar 4, 9:36 PM EST	Severe Thunderstorm Warning	PBZ	Westmoreland	39 min
Mar 4, 10:01 PM EST	Severe Thunderstorm Warning	PBZ	Indiana	44 min
Mar 5, 2:55 AM EST	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	40 min
Mar 8, 3:58 PM EST	Severe Thunderstorm Warning	CTP	York	47 min
Mar 8, 5:22 PM EST	Severe Thunderstorm Warning	PHI	Delaware	23 min
Mar 8, 5:44 PM EST	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	46 min
Mar 8, 5:49 PM EST	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	41 min
Apr 1, 7:20 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Wayne	40 min
Apr 1, 8:18 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	27 min
Apr 1, 8:38 PM EDT	Severe Thunderstorm Warning	BGM	Pike	37 min
Apr 1, 9:02 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	37 min
Apr 11, 9:23 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	35 min
Apr 12, 12:00 AM EDT	Severe Thunderstorm Warning	CLE	Crawford	29 min
Apr 20, 6:32 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	43 min
Apr 26, 5:03 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Huntingdon	57 min
Apr 26, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	53 min
Apr 26, 6:02 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton, Huntingdon	43 min
Apr 26, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	43 min
May 17, 5:02 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	28 min
May 27, 6:10 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	65 min
May 27, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks	29 min
May 31, 3:20 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	40 min
May 31, 4:03 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	42 min
May 31, 4:54 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Jefferson	51 min
May 31, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Warren	25 min
May 31, 5:20 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wayne, Wyoming	40 min
May 31, 5:26 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	64 min
May 31, 5:30 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Wayne	60 min
May 31, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	61 min
May 31, 5:50 PM EDT	Severe Thunderstorm Warning	BGM	Pike	55 min
May 31, 6:14 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	31 min
May 31, 6:17 PM EDT	Severe Thunderstorm Warning	BGM	Pike	27 min
May 31, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	33 min
May 31, 10:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	66 min
Jun 4, 7:52 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	43 min
Jun 4, 1:47 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	43 min
Jun 5, 2:55 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Mercer, Venango	50 min
Jun 5, 3:15 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	45 min
Jun 5, 5:10 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	35 min
Jun 7, 4:04 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	41 min
Jun 8, 1:57 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	48 min
Jun 8, 2:35 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	40 min
Jun 8, 2:55 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	50 min
Jun 8, 3:03 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	42 min
Jun 8, 3:42 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	48 min
Jun 8, 4:07 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	38 min
Jun 8, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	63 min
Jun 8, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	43 min
Jun 8, 4:58 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	47 min
Jun 8, 5:14 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	21 min
Jun 8, 5:47 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	43 min
Jun 8, 6:25 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	35 min
Jun 8, 6:29 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	46 min
Jun 8, 6:55 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	50 min
Jun 8, 7:07 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	38 min
Jun 8, 7:43 PM EDT	Severe Thunderstorm Warning	BGM	Pike	32 min
Jun 8, 8:24 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	51 min
Jun 8, 8:32 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	43 min
Jun 8, 8:42 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	48 min
Jun 8, 8:43 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	77 min
Jun 8, 9:20 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest	40 min
Jun 8, 10:27 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	45 min
Jun 9, 9:51 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	54 min
Jun 10, 6:52 AM EDT	Severe Thunderstorm Warning	CLE	Erie	23 min
Jun 10, 4:21 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Franklin, Fulton, Somerset	54 min
Jun 10, 4:31 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	59 min
Jun 10, 4:46 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	44 min
Jun 10, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	56 min
Jun 10, 4:55 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	50 min
Jun 10, 4:58 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 2 more	62 min
Jun 10, 5:10 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	53 min
Jun 10, 5:21 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	54 min
Jun 10, 5:26 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	49 min
Jun 10, 5:26 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin, Northumberland, Snyder, Union	64 min
Jun 10, 5:29 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Fulton, Perry	61 min
Jun 10, 5:31 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	59 min
Jun 10, 5:32 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Luzerne, Wyoming	43 min
Jun 10, 5:40 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	50 min
Jun 10, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	58 min
Jun 10, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	54 min
Jun 10, 5:56 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	49 min
Jun 10, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	59 min
Jun 10, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	40 min
Jun 10, 6:24 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	66 min
Jun 10, 6:25 PM EDT	Severe Thunderstorm Warning	BGM	Pike	50 min
Jun 10, 6:26 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Snyder, Union	64 min
Jun 10, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	59 min
Jun 10, 6:44 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	46 min
Jun 10, 6:56 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	64 min
Jun 10, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	48 min
Jun 10, 6:59 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	46 min
Jun 10, 7:02 PM EDT	Severe Thunderstorm Warning	PHI	Chester	58 min
Jun 10, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	77 min
Jun 10, 7:27 PM EDT	Severe Thunderstorm Warning	BGM	Pike	63 min
Jun 10, 7:32 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wayne, Wyoming	43 min
Jun 10, 7:36 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	54 min
Jun 10, 7:52 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	38 min
Jun 10, 8:01 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	59 min
Jun 10, 8:11 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	64 min
Jun 10, 8:12 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	63 min
Jun 10, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	41 min
Jun 10, 8:32 PM EDT	Severe Thunderstorm Warning	BGM	Pike	58 min
Jun 13, 2:57 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	63 min
Jun 13, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	57 min
Jun 13, 3:18 PM EDT	Severe Thunderstorm Warning	PBZ	Forest	57 min
Jun 13, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clinton, Potter	64 min
Jun 13, 9:07 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	53 min
Jun 13, 9:12 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	63 min
Jun 13, 9:17 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	58 min
Jun 13, 9:23 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Beaver, Butler, Clarion, Lawrence, Mercer and 1 more	67 min
Jun 13, 10:12 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	48 min
Jun 14, 2:31 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	44 min
Jun 14, 3:02 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	58 min
Jun 14, 4:26 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	64 min
Jun 14, 5:07 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	53 min
Jun 14, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	57 min
Jun 14, 6:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester	75 min
Jun 14, 7:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	70 min
Jun 14, 7:42 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	63 min
Jun 14, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Philadelphia	79 min
Jun 14, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	55 min
Jun 16, 1:15 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	60 min
Jun 16, 1:32 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson, Venango	43 min
Jun 16, 1:43 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Indiana, Jefferson	62 min
Jun 16, 1:44 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	61 min
Jun 16, 1:54 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	96 min
Jun 16, 2:03 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	42 min
Jun 16, 2:07 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	38 min
Jun 16, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Potter	63 min
Jun 16, 2:14 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	31 min
Jun 16, 2:24 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	66 min
Jun 16, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	68 min
Jun 16, 2:41 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	49 min
Jun 16, 2:49 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	71 min
Jun 16, 2:56 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter	64 min
Jun 16, 3:08 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Mercer, Venango	37 min
Jun 16, 3:09 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	55 min
Jun 16, 3:23 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	52 min
Jun 16, 3:27 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	48 min
Jun 16, 3:29 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	31 min
Jun 16, 3:31 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	74 min
Jun 16, 3:35 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	40 min
Jun 16, 3:44 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	61 min
Jun 16, 3:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver	49 min
Jun 16, 3:57 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	63 min
Jun 16, 4:03 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	57 min
Jun 16, 4:13 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Union	53 min
Jun 16, 4:15 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	31 min
Jun 16, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	44 min
Jun 16, 4:22 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	53 min
Jun 16, 4:22 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Westmoreland	23 min
Jun 16, 4:35 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	55 min
Jun 16, 4:43 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	62 min
Jun 16, 4:45 PM EDT	Severe Thunderstorm Warning	BGM	Pike	75 min
Jun 16, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	52 min
Jun 16, 4:50 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	40 min
Jun 16, 5:20 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Cumberland, Dauphin, Huntingdon, Juniata, Mifflin and 4 more	55 min
Jun 16, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Potter	53 min
Jun 16, 5:29 PM EDT	Severe Thunderstorm Warning	CTP	Montour, Northumberland, Snyder, Union	52 min
Jun 16, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	74 min
Jun 16, 5:52 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Huntingdon, Juniata, Mifflin, Perry	53 min
Jun 16, 5:57 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	33 min
Jun 16, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	19 min
Jun 16, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	53 min
Jun 16, 6:38 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon, Schuylkill	29 min
Jun 16, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	34 min
Jun 16, 6:51 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	39 min
Jun 16, 6:54 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	62 min
Jun 16, 7:04 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	41 min
Jun 16, 7:29 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	46 min
Jun 16, 7:33 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	42 min
Jun 16, 8:09 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	66 min
Jun 16, 11:29 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	46 min
Jun 18, 3:48 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	42 min
Jun 18, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	40 min
Jun 18, 4:57 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	42 min
Jun 18, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	57 min
Jun 20, 2:53 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	52 min
Jun 20, 3:25 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Fulton	65 min
Jun 20, 3:31 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	44 min
Jun 20, 3:45 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	45 min
Jun 20, 5:02 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	58 min
Jun 20, 5:27 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne, Wyoming	33 min
Jun 20, 5:57 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	33 min
Jun 20, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	59 min
Jun 20, 6:58 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	32 min
Jun 20, 8:28 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	35 min
Jun 21, 2:11 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	48 min
Jun 21, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	Potter	46 min
Jun 21, 4:52 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	23 min
Jun 21, 5:07 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Wyoming	38 min
Jun 21, 5:15 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	31 min
Jun 21, 7:12 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer	78 min
Jun 21, 7:50 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	55 min
Jun 22, 2:29 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	61 min
Jun 22, 3:27 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	63 min
Jun 22, 4:02 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton, Huntingdon	43 min
Jun 22, 4:39 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin, Perry	51 min
Jun 22, 5:25 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton	65 min
Jun 22, 5:25 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	65 min
Jun 22, 5:27 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	48 min
Jun 22, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Snyder, Union	44 min
Jun 22, 6:48 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Huntingdon, Juniata, Mifflin	57 min
Jun 22, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Huntingdon, Mifflin	61 min
Jun 22, 11:42 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	48 min
Jun 23, 2:55 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	50 min
Jun 23, 3:42 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	48 min
Jun 23, 3:59 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler	61 min
Jun 23, 4:13 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	62 min
Jun 23, 4:20 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	55 min
Jun 23, 4:21 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest	54 min
Jun 23, 5:09 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Westmoreland	54 min
Jun 23, 7:53 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	52 min
Jun 23, 8:37 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	38 min
Jun 23, 8:45 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	60 min
Jun 23, 8:59 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	46 min
Jun 23, 10:54 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	43 min
Jun 23, 11:20 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Lehigh, Montgomery	55 min
Jun 26, 5:45 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	60 min
Jun 26, 6:21 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	54 min
Jun 26, 6:35 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	55 min
Jun 26, 7:12 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson, Venango	63 min
Jun 26, 7:31 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	59 min
Jun 26, 8:04 PM EDT	Severe Thunderstorm Warning	CLE	Erie	56 min
Jun 26, 8:16 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	59 min
Jun 26, 8:22 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	53 min
Jun 26, 8:56 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, Potter	33 min
Jun 26, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Centre, Clearfield, Somerset	44 min
Jun 26, 9:45 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Centre, Clinton, Huntingdon	60 min
Jun 27, 3:47 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	58 min
Jun 27, 4:11 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	64 min
Jun 27, 5:12 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	48 min
Jun 28, 5:18 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	57 min
Jun 28, 5:40 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	65 min
Jun 28, 5:43 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria	32 min
Jun 28, 5:52 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	53 min
Jun 28, 6:11 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	64 min
Jun 28, 6:16 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	59 min
Jun 28, 6:30 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Westmoreland	60 min
Jun 28, 6:50 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Butler	23 min
Jun 28, 6:59 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	61 min
Jun 28, 7:09 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	66 min
Jun 28, 7:29 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	61 min
Jun 28, 7:32 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	58 min
Jun 28, 7:32 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	35 min
Jun 28, 8:29 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	61 min
Jun 28, 9:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester	70 min
Jun 28, 10:27 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	63 min
Jun 29, 11:50 AM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	25 min
Jun 29, 12:16 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	59 min
Jun 29, 12:53 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	67 min
Jun 29, 1:07 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	53 min
Jun 29, 1:15 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	60 min
Jun 29, 1:33 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	42 min
Jun 29, 2:21 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	54 min
Jun 29, 2:33 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	57 min
Jun 29, 2:45 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	60 min
Jun 29, 3:01 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Jefferson	59 min
Jun 29, 3:26 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Columbia, Lycoming, Montour, Northumberland and 2 more	79 min
Jun 29, 3:36 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Elk	69 min
Jun 29, 3:44 PM EDT	Severe Thunderstorm Warning	CTP	Montour, Northumberland, Snyder	46 min
Jun 29, 4:11 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	49 min
Jun 29, 4:21 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	39 min
Jun 29, 4:43 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	47 min
Jun 29, 4:57 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	48 min
Jun 29, 5:22 PM EDT	Severe Thunderstorm Warning	CTP	Warren	38 min
Jun 29, 5:37 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Indiana, Washington, Westmoreland	53 min
Jun 29, 5:41 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	64 min
Jun 29, 5:56 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Warren	64 min
Jun 29, 6:19 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	56 min
Jun 29, 6:31 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	29 min
Jun 29, 6:34 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan	56 min
Jun 29, 6:38 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	51 min
Jun 29, 7:23 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Greene, Washington, Westmoreland	41 min
Jun 29, 7:55 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Indiana, Washington, Westmoreland	65 min
Jun 29, 8:15 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Perry	60 min
Jun 29, 8:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks	50 min
Jul 6, 3:24 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	27 min
Jul 8, 3:45 PM EDT	Severe Thunderstorm Warning	CLE	Erie	45 min
Jul 8, 6:06 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	54 min
Jul 8, 6:15 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	75 min
Jul 8, 6:38 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Lawrence, Washington	67 min
Jul 8, 6:58 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	62 min
Jul 8, 7:06 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	33 min
Jul 8, 7:32 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington	46 min
Jul 12, 8:32 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	43 min
Jul 13, 12:54 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin	66 min
Jul 13, 2:08 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	67 min
Jul 13, 4:45 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	45 min
Jul 13, 5:30 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	45 min
Jul 16, 7:49 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Luzerne, Susquehanna, Wyoming	32 min
Jul 17, 12:47 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	58 min
Jul 17, 1:34 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	41 min
Jul 17, 2:59 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	61 min
Jul 17, 3:16 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	29 min
Jul 17, 3:24 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Sullivan	96 min
Jul 17, 3:55 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	65 min
Jul 17, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Snyder	63 min
Jul 17, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	59 min
Jul 17, 4:55 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Juniata, Mifflin	26 min
Jul 17, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	64 min
Jul 17, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	62 min
Jul 17, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	67 min
Jul 17, 5:43 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Snyder, Union	41 min
Jul 17, 5:52 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Perry, Snyder	38 min
Jul 17, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	39 min
Jul 17, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	51 min
Jul 18, 4:36 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	39 min
Jul 18, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming	44 min
Jul 18, 5:16 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	18 min
Jul 18, 5:45 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	60 min
Jul 18, 6:30 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Sullivan	30 min
Jul 20, 1:13 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	62 min
Jul 20, 1:56 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Washington	64 min
Jul 20, 2:18 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Fayette, Indiana, Washington and 1 more	57 min
Jul 20, 2:28 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	62 min
Jul 20, 3:04 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Fayette, Greene, Indiana, Jefferson, Westmoreland	56 min
Jul 20, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Elk, Somerset	72 min
Jul 20, 3:20 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	55 min
Jul 20, 4:04 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Centre, Clearfield, Clinton and 4 more	56 min
Jul 20, 4:07 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	53 min
Jul 20, 4:10 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	65 min
Jul 20, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	59 min
Jul 20, 4:59 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Centre, Clinton, Cumberland, Franklin and 8 more	76 min
Jul 20, 5:12 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	63 min
Jul 20, 8:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	58 min
Jul 20, 8:19 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	26 min
Jul 20, 8:48 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	42 min
Jul 20, 9:22 PM EDT	Severe Thunderstorm Warning	PHI	Chester	23 min
Jul 20, 9:29 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery	32 min
Jul 21, 8:12 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	63 min
Jul 21, 8:33 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	57 min
Jul 21, 8:47 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	58 min
Jul 21, 8:52 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	53 min
Jul 21, 9:35 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	55 min
Jul 21, 9:45 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	60 min
Jul 22, 3:39 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	66 min
Jul 22, 7:05 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	26 min
Jul 22, 7:06 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	54 min
Jul 22, 7:55 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	65 min
Jul 23, 1:24 AM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	66 min
Jul 23, 1:39 AM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Lancaster, York	66 min
Jul 23, 2:08 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	82 min
Jul 23, 2:22 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Fulton, Huntingdon, Juniata, Mifflin and 1 more	68 min
Jul 23, 2:34 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Perry	71 min
Jul 23, 2:36 AM EDT	Severe Thunderstorm Warning	CTP	Warren	54 min
Jul 23, 5:26 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	53 min
Jul 23, 1:42 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	63 min
Jul 23, 2:00 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	60 min
Jul 23, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	35 min
Jul 23, 2:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Jul 23, 3:20 PM EDT	Severe Thunderstorm Warning	BGM	Pike	55 min
Jul 23, 3:24 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	30 min
Jul 23, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	60 min
Jul 23, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	65 min
Jul 23, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	62 min
Jul 23, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	38 min
Jul 23, 4:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	58 min
Jul 23, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	57 min
Jul 23, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	62 min
Jul 23, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	60 min
Jul 23, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	57 min
Jul 23, 8:36 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	54 min
Jul 23, 8:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	31 min
Jul 24, 1:34 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Clinton, Elk	41 min
Jul 24, 1:45 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Clearfield	45 min
Jul 24, 2:17 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	43 min
Jul 24, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Huntingdon	47 min
Jul 24, 2:58 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Northumberland, Perry, Snyder, Union	47 min
Jul 24, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Huntingdon, Juniata, Mifflin, Perry	57 min
Jul 26, 3:16 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	59 min
Jul 26, 3:57 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	59 min
Jul 26, 4:22 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	53 min
Jul 26, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	63 min
Jul 26, 4:54 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	66 min
Jul 26, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	54 min
Jul 26, 5:20 PM EDT	Severe Thunderstorm Warning	CTP	Warren	85 min
Jul 26, 5:31 PM EDT	Severe Thunderstorm Warning	CTP	Warren	89 min
Jul 26, 5:51 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence	54 min
Jul 26, 5:53 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Montour, Northumberland, Union	37 min
Jul 26, 5:57 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Venango	63 min
Jul 26, 6:03 PM EDT	Severe Thunderstorm Warning	CTP	McKean	87 min
Jul 26, 6:18 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	42 min
Jul 26, 6:49 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Wyoming	40 min
Jul 26, 10:29 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	46 min
Jul 27, 11:17 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Huntingdon	58 min
Jul 27, 11:46 AM EDT	Severe Thunderstorm Warning	CTP	Adams, York	59 min
Jul 27, 11:50 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	70 min
Jul 27, 11:58 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	17 min
Jul 27, 12:00 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	60 min
Jul 27, 12:05 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	40 min
Jul 27, 12:07 PM EDT	Severe Thunderstorm Warning	PHI	Chester	53 min
Jul 27, 12:19 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	56 min
Jul 27, 12:33 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	57 min
Jul 27, 12:36 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	24 min
Jul 27, 12:38 PM EDT	Severe Thunderstorm Warning	PHI	Chester	67 min
Jul 27, 12:54 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	66 min
Jul 27, 12:57 PM EDT	Severe Thunderstorm Warning	PHI	Chester	63 min
Jul 27, 1:00 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	60 min
Jul 27, 1:21 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	52 min
Jul 27, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	61 min
Jul 27, 2:11 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	64 min
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	61 min
Jul 27, 2:17 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	58 min
Jul 27, 2:36 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wayne	39 min
Jul 27, 3:12 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	48 min
Jul 27, 3:54 PM EDT	Severe Thunderstorm Warning	BGM	Pike	36 min
Jul 27, 4:52 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	23 min
Jul 27, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	56 min
Jul 27, 5:45 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	90 min
Jul 30, 4:44 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	31 min
Jul 30, 4:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	62 min
Jul 30, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Berks	33 min
Jul 30, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	35 min
Jul 31, 5:36 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	54 min
Jul 31, 6:10 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	65 min
Jul 31, 7:23 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	67 min
Aug 1, 11:59 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	31 min
Aug 2, 1:07 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette	38 min
Aug 2, 3:01 AM EDT	Severe Thunderstorm Warning	CLE	Erie	59 min
Aug 2, 6:39 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield, Clinton, Elk	66 min
Aug 2, 7:03 AM EDT	Severe Thunderstorm Warning	CTP	Potter, Tioga	57 min
Aug 2, 7:28 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	47 min
Aug 2, 8:44 AM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Schuylkill, Snyder, Union	61 min
Aug 2, 9:40 AM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	42 min
Aug 2, 10:29 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	44 min
Aug 2, 12:51 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Perry	39 min
Aug 2, 1:11 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	49 min
Aug 2, 1:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	62 min
Aug 2, 2:26 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	52 min
Aug 2, 3:02 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	28 min
Aug 2, 3:37 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	23 min
Aug 2, 4:09 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	36 min
Aug 2, 4:34 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	56 min
Aug 2, 4:42 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	93 min
Aug 2, 4:47 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	58 min
Aug 2, 5:21 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	54 min
Aug 2, 5:39 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	96 min
Aug 2, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	55 min
Aug 2, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Aug 2, 6:25 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	65 min
Aug 2, 6:51 PM EDT	Severe Thunderstorm Warning	PHI	Berks	54 min
Aug 7, 2:22 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	68 min
Aug 7, 2:38 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	37 min
Aug 7, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	57 min
Aug 7, 4:37 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Lebanon, Mifflin, Perry	53 min
Aug 7, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	55 min
Aug 7, 5:11 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Schuylkill, Snyder and 1 more	64 min
Aug 7, 5:27 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, Perry, York	63 min
Aug 7, 7:26 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer	64 min
Aug 7, 9:55 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	50 min
Aug 9, 7:44 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	35 min
Aug 9, 8:13 PM EDT	Severe Thunderstorm Warning	CLE	Erie	62 min
Aug 10, 10:18 AM EDT	Severe Thunderstorm Warning	PHI	Chester	57 min
Aug 10, 10:44 AM EDT	Severe Thunderstorm Warning	PHI	Delaware	61 min
Aug 10, 11:09 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	66 min
Aug 10, 11:46 AM EDT	Severe Thunderstorm Warning	PHI	Delaware	59 min
Aug 10, 12:21 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	84 min
Aug 10, 12:40 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	95 min
Aug 10, 12:59 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	61 min
Aug 10, 1:05 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Carbon, Lehigh, Monroe, Northampton	115 min
Aug 10, 1:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	65 min
Aug 10, 1:21 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	54 min
Aug 10, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	58 min
Aug 10, 2:11 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	64 min
Aug 10, 2:13 PM EDT	Severe Thunderstorm Warning	BGM	Pike	62 min
Aug 10, 2:16 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	59 min
Aug 10, 2:19 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	32 min
Aug 10, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	58 min
Aug 10, 2:59 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wayne	61 min
Aug 10, 3:12 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	63 min
Aug 10, 3:12 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, Lebanon, York	63 min
Aug 10, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks	40 min
Aug 10, 3:57 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	63 min
Aug 10, 4:11 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne, Wyoming	53 min
Aug 10, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, Lebanon, York	63 min
Aug 10, 4:15 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	60 min
Aug 10, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Chester	75 min
Aug 10, 5:10 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	35 min
Aug 10, 5:37 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	53 min
Aug 10, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	75 min
Aug 11, 9:00 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	45 min
Aug 11, 11:23 AM EDT	Severe Thunderstorm Warning	PHI	Monroe	38 min
Aug 11, 4:21 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	39 min
Aug 11, 8:21 PM EDT	Severe Thunderstorm Warning	CLE	Erie	24 min
Aug 13, 8:08 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	53 min
Aug 13, 9:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	64 min
Aug 13, 10:24 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	36 min
Aug 14, 1:19 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	27 min
Aug 14, 2:24 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	66 min
Aug 14, 2:37 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	38 min
Aug 14, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh	34 min
Aug 14, 2:53 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry, Snyder	67 min
Aug 14, 3:15 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	60 min
Aug 14, 3:20 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland	55 min
Aug 14, 3:29 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	31 min
Aug 14, 3:36 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	54 min
Aug 14, 3:52 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	53 min
Aug 14, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	37 min
Aug 14, 4:22 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	53 min
Aug 14, 4:42 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	93 min
Aug 14, 5:27 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	61 min
Aug 14, 6:04 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	41 min
Aug 18, 11:23 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	67 min
Sep 9, 4:16 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	44 min
Sep 9, 4:31 AM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	44 min
Sep 9, 5:11 AM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clinton, Huntingdon, Mifflin, Montour and 3 more	64 min
Sep 9, 6:14 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	46 min
Sep 9, 6:22 AM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin, Perry, Snyder	53 min
Sep 9, 8:11 AM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	44 min
Sep 9, 8:40 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	50 min
Sep 9, 8:45 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	75 min
Sep 9, 8:51 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Montgomery and 1 more	39 min
Sep 9, 9:21 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more	39 min
Sep 9, 10:57 AM EDT	Severe Thunderstorm Warning	PHI	Bucks	48 min
Sep 13, 5:13 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	47 min
Nov 15, 3:54 PM EST	Severe Thunderstorm Warning	PHI	Berks	38 min
Nov 15, 4:15 PM EST	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	60 min
Nov 15, 4:33 PM EST	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	38 min
Dec 28, 7:02 AM EST	Severe Thunderstorm Warning	CLE	Crawford, Erie	58 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 2007 2009

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.