Alert archive / Pennsylvania / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Pennsylvania, 2009

414 severe thunderstorm warnings in 2009. 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 2009. Tap one for its archive.

Severe Thunderstorm Warnings: 414
Busiest month: June133 severe thunderstorm warnings
Busiest day: June 26, 200932 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.

214 of 415 severe thunderstorm warnings covering Pennsylvania in 2009 had a qualifying storm report inside them; 293 of 365 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

Pennsylvania, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	415	214	48%	365	80%	26 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pittsburgh, PA: severe thunderstorm warnings	115	66	43%	119	78%	25 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	235	113	52%	260	82%	26 min
NWS Cleveland, OH: severe thunderstorm warnings	132	84	36%	137	92%	24 min
NWS Binghamton, NY: severe thunderstorm warnings	183	79	57%	164	85%	26 min
NWS State College, PA: severe thunderstorm warnings	166	86	48%	182	80%	26 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
Feb 11, 6:44 PM EST	Severe Thunderstorm Warning	PBZ	Greene, Washington	46 min
Feb 11, 6:54 PM EST	Severe Thunderstorm Warning	PBZ	Beaver, Washington	36 min
Feb 11, 7:26 PM EST	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 6 more	64 min
Feb 11, 7:46 PM EST	Severe Thunderstorm Warning	CTP	Bedford, Cambria, Clearfield, Somerset	74 min
Feb 11, 8:00 PM EST	Severe Thunderstorm Warning	CLE	Crawford, Erie	60 min
Feb 11, 8:11 PM EST	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Fayette, Forest, Indiana and 4 more	46 min
Feb 11, 8:41 PM EST	Severe Thunderstorm Warning	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 14 more	64 min
Mar 29, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	42 min
Mar 29, 4:13 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	62 min
Mar 29, 4:34 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	71 min
Mar 29, 4:41 PM EDT	Severe Thunderstorm Warning	PHI	Berks	94 min
Mar 29, 4:44 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	61 min
Mar 29, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh	64 min
Mar 29, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh	63 min
Mar 29, 5:29 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	16 min
Mar 29, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Lehigh, Montgomery, Northampton	50 min
Mar 29, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	64 min
Mar 29, 7:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	51 min
Apr 21, 7:06 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	39 min
Apr 24, 7:35 AM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	25 min
Apr 24, 7:45 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	30 min
Apr 24, 9:24 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	36 min
Apr 24, 9:38 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	37 min
May 1, 4:33 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	57 min
May 11, 5:39 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	38 min
May 16, 1:33 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Potter, Tioga	57 min
May 16, 2:16 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean	59 min
May 16, 4:18 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	42 min
May 16, 4:25 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	65 min
May 16, 4:32 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	58 min
May 16, 4:37 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	53 min
May 16, 5:27 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	48 min
May 16, 6:38 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	52 min
May 16, 7:11 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Perry	64 min
May 16, 7:32 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	58 min
May 16, 7:38 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	52 min
May 16, 7:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks	56 min
May 16, 8:10 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	65 min
May 16, 8:30 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	47 min
May 23, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Blair	33 min
May 23, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	44 min
May 23, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	37 min
May 24, 1:12 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	48 min
May 24, 1:51 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver	39 min
May 24, 2:15 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	45 min
May 24, 2:27 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	33 min
May 24, 2:49 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	56 min
May 24, 3:05 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	55 min
May 24, 3:09 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	66 min
May 24, 3:35 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	40 min
May 24, 4:59 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	46 min
May 24, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	59 min
May 24, 7:04 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Juniata, Perry	56 min
May 24, 7:06 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	54 min
May 24, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery	56 min
May 28, 4:09 PM EDT	Severe Thunderstorm Warning	CTP	Warren	81 min
May 28, 4:14 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	46 min
May 28, 4:46 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	44 min
May 28, 5:16 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	59 min
May 28, 6:28 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	47 min
May 28, 6:34 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	41 min
May 28, 6:37 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	38 min
May 28, 6:47 PM EDT	Severe Thunderstorm Warning	CTP	McKean	58 min
May 28, 7:03 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	42 min
May 28, 8:11 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	49 min
May 28, 8:42 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	63 min
May 29, 1:52 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	53 min
May 29, 2:13 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	62 min
May 29, 2:22 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	21 min
May 29, 3:13 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	62 min
May 29, 3:28 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	62 min
May 29, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Chester	67 min
May 29, 5:10 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	42 min
Jun 2, 1:53 AM EDT	Severe Thunderstorm Warning	CLE	Erie	52 min
Jun 2, 1:20 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Perry, York	55 min
Jun 2, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	67 min
Jun 2, 3:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester	38 min
Jun 2, 10:43 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton, Somerset	62 min
Jun 2, 11:40 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Bedford, Cumberland, Franklin, Fulton, Huntingdon and 3 more	65 min
Jun 3, 12:26 AM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	79 min
Jun 8, 5:24 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	51 min
Jun 9, 12:35 AM EDT	Severe Thunderstorm Warning	CLE	Erie	31 min
Jun 9, 5:09 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill	66 min
Jun 9, 5:38 AM EDT	Severe Thunderstorm Warning	PHI	Berks	67 min
Jun 9, 6:13 AM EDT	Severe Thunderstorm Warning	CTP	Lancaster	27 min
Jun 9, 7:20 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	55 min
Jun 9, 8:00 AM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	60 min
Jun 9, 8:06 AM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	54 min
Jun 9, 1:03 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	42 min
Jun 9, 1:19 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Perry	41 min
Jun 9, 1:42 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	63 min
Jun 9, 1:49 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	56 min
Jun 9, 1:54 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, York	66 min
Jun 9, 2:00 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	60 min
Jun 9, 2:07 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	23 min
Jun 9, 2:16 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Fulton	44 min
Jun 9, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	66 min
Jun 9, 2:26 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	64 min
Jun 9, 2:35 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	25 min
Jun 9, 2:41 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Perry, York	64 min
Jun 9, 2:55 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	55 min
Jun 9, 2:57 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	63 min
Jun 9, 3:12 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	33 min
Jun 9, 3:22 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	38 min
Jun 9, 3:23 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	37 min
Jun 9, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	62 min
Jun 9, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jun 9, 3:34 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry	41 min
Jun 9, 3:44 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	49 min
Jun 9, 4:11 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	49 min
Jun 9, 4:12 PM EDT	Severe Thunderstorm Warning	BGM	Pike	33 min
Jun 9, 4:18 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	42 min
Jun 10, 3:23 PM EDT	Severe Thunderstorm Warning	CTP	York	52 min
Jun 10, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	York	57 min
Jun 10, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	56 min
Jun 10, 5:00 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin	60 min
Jun 10, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Berks	47 min
Jun 10, 5:14 PM EDT	Severe Thunderstorm Warning	CTP	York	46 min
Jun 10, 5:56 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	34 min
Jun 10, 6:02 PM EDT	Severe Thunderstorm Warning	PHI	Berks	58 min
Jun 10, 6:09 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland, Schuylkill	36 min
Jun 10, 6:30 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	30 min
Jun 10, 6:33 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	12 min
Jun 13, 6:06 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	54 min
Jun 13, 6:20 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	40 min
Jun 13, 6:39 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	66 min
Jun 13, 7:09 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland, Schuylkill	66 min
Jun 13, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	61 min
Jun 15, 1:10 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	50 min
Jun 15, 1:42 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	48 min
Jun 15, 2:33 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	57 min
Jun 15, 3:16 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	59 min
Jun 15, 3:36 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	54 min
Jun 15, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	60 min
Jun 15, 4:56 PM EDT	Severe Thunderstorm Warning	BGM	Pike	64 min
Jun 15, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	62 min
Jun 15, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery, Philadelphia	65 min
Jun 15, 6:36 PM EDT	Severe Thunderstorm Warning	BGM	Pike	42 min
Jun 15, 6:37 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	53 min
Jun 17, 5:24 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	66 min
Jun 17, 5:57 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	63 min
Jun 17, 6:14 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	46 min
Jun 17, 7:39 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	66 min
Jun 17, 9:14 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	46 min
Jun 17, 9:48 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	57 min
Jun 17, 10:03 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	42 min
Jun 17, 10:42 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington	41 min
Jun 20, 1:45 AM EDT	Severe Thunderstorm Warning	PBZ	Fayette	45 min
Jun 20, 1:57 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Forest, Lawrence, Mercer and 1 more	63 min
Jun 20, 2:47 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	58 min
Jun 20, 3:26 PM EDT	Severe Thunderstorm Warning	CTP	York	64 min
Jun 20, 3:59 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	45 min
Jun 20, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester	53 min
Jun 25, 4:49 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	41 min
Jun 25, 5:13 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	62 min
Jun 25, 5:23 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	52 min
Jun 25, 6:29 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	31 min
Jun 25, 9:08 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	52 min
Jun 25, 9:52 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	39 min
Jun 25, 10:18 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	57 min
Jun 26, 1:36 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	54 min
Jun 26, 1:43 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	62 min
Jun 26, 1:49 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	56 min
Jun 26, 2:27 PM EDT	Severe Thunderstorm Warning	CTP	Potter	48 min
Jun 26, 2:31 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	44 min
Jun 26, 2:40 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	65 min
Jun 26, 2:55 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Lackawanna, Luzerne, Susquehanna, Wyoming	65 min
Jun 26, 3:07 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	53 min
Jun 26, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	59 min
Jun 26, 3:42 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Pike, Wayne	63 min
Jun 26, 3:53 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	82 min
Jun 26, 4:10 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	53 min
Jun 26, 4:15 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Lancaster, York	60 min
Jun 26, 4:51 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	69 min
Jun 26, 5:08 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	67 min
Jun 26, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks	55 min
Jun 26, 5:43 PM EDT	Severe Thunderstorm Warning	CTP	York	62 min
Jun 26, 6:01 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	59 min
Jun 26, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh	59 min
Jun 26, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	52 min
Jun 26, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks	45 min
Jun 26, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	41 min
Jun 26, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Juniata, Perry	51 min
Jun 26, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery, Philadelphia	48 min
Jun 26, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	50 min
Jun 26, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	60 min
Jun 26, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	92 min
Jun 26, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks	45 min
Jun 26, 7:45 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	65 min
Jun 30, 11:15 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	60 min
Jun 30, 12:07 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	33 min
Jun 30, 12:27 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, York	78 min
Jun 30, 12:39 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	81 min
Jun 30, 12:46 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne	44 min
Jun 30, 12:46 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	44 min
Jun 30, 12:51 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	54 min
Jun 30, 1:14 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Schuylkill	76 min
Jun 30, 1:15 PM EDT	Severe Thunderstorm Warning	PHI	Berks	75 min
Jun 30, 1:54 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	66 min
Jun 30, 2:05 PM EDT	Severe Thunderstorm Warning	CTP	Adams	40 min
Jun 30, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	44 min
Jun 30, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	54 min
Jun 30, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	63 min
Jun 30, 3:57 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	63 min
Jun 30, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Tioga	55 min
Jun 30, 5:02 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	43 min
Jul 1, 1:16 PM EDT	Severe Thunderstorm Warning	BGM	Pike	59 min
Jul 1, 7:05 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	55 min
Jul 2, 7:47 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	43 min
Jul 7, 12:09 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	66 min
Jul 7, 1:56 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	64 min
Jul 7, 2:26 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	40 min
Jul 7, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	61 min
Jul 7, 2:39 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Wayne	21 min
Jul 7, 6:35 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	25 min
Jul 7, 7:06 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	39 min
Jul 11, 3:01 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	59 min
Jul 11, 3:25 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	65 min
Jul 11, 4:58 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Northumberland, Union	62 min
Jul 11, 5:10 PM EDT	Severe Thunderstorm Warning	CLE	Erie	16 min
Jul 11, 5:26 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	34 min
Jul 11, 5:42 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	63 min
Jul 11, 5:44 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	61 min
Jul 11, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Warren	59 min
Jul 11, 5:57 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	63 min
Jul 11, 6:07 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield	42 min
Jul 11, 6:33 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Schuylkill	87 min
Jul 11, 6:42 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Centre, Clearfield, Huntingdon, Mifflin	63 min
Jul 11, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	Elk	62 min
Jul 11, 7:05 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	40 min
Jul 11, 7:19 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Huntingdon, Lycoming, Mifflin, Montour and 3 more	71 min
Jul 11, 8:10 PM EDT	Severe Thunderstorm Warning	CLE	Erie	49 min
Jul 11, 8:28 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Snyder, Union	62 min
Jul 11, 9:06 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Perry	54 min
Jul 11, 9:55 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	48 min
Jul 11, 11:27 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Potter	48 min
Jul 16, 3:53 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	31 min
Jul 16, 5:22 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	53 min
Jul 16, 5:54 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	30 min
Jul 16, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	63 min
Jul 16, 7:05 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	70 min
Jul 17, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	52 min
Jul 17, 6:10 PM EDT	Severe Thunderstorm Warning	PHI	Chester	80 min
Jul 17, 7:01 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	44 min
Jul 17, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	53 min
Jul 17, 7:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	53 min
Jul 21, 1:44 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	61 min
Jul 21, 2:16 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	59 min
Jul 21, 2:55 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	65 min
Jul 21, 2:59 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	61 min
Jul 21, 3:16 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Butler	59 min
Jul 21, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	63 min
Jul 21, 4:34 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer	56 min
Jul 21, 5:31 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	44 min
Jul 21, 7:16 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	29 min
Jul 21, 9:47 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin	58 min
Jul 23, 6:21 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	54 min
Jul 23, 6:51 PM EDT	Severe Thunderstorm Warning	CTP	Centre	39 min
Jul 23, 7:25 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, York	65 min
Jul 23, 8:02 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Northumberland, Snyder	43 min
Jul 24, 4:16 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	59 min
Jul 24, 4:20 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	55 min
Jul 24, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	50 min
Jul 24, 6:28 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	62 min
Jul 24, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Union	61 min
Jul 24, 7:11 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	46 min
Jul 24, 7:45 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	47 min
Jul 25, 3:33 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, McKean, Potter, Tioga	42 min
Jul 25, 5:14 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Northumberland, Snyder, Union	40 min
Jul 25, 7:51 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	75 min
Jul 26, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	54 min
Jul 26, 6:21 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	39 min
Jul 26, 7:05 PM EDT	Severe Thunderstorm Warning	PHI	Chester	70 min
Jul 26, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	59 min
Jul 26, 8:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	37 min
Jul 27, 9:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	55 min
Jul 29, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	72 min
Jul 29, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	78 min
Jul 29, 12:21 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	39 min
Jul 29, 12:55 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	50 min
Jul 29, 1:38 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	22 min
Jul 29, 1:49 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	41 min
Jul 29, 1:56 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
Jul 29, 1:57 PM EDT	Severe Thunderstorm Warning	BGM	Pike	48 min
Jul 29, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 29, 2:30 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland	45 min
Jul 29, 3:03 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin	27 min
Jul 29, 3:19 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	17 min
Jul 29, 4:52 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	53 min
Jul 29, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	66 min
Jul 29, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	40 min
Jul 29, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin	59 min
Jul 29, 7:23 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	97 min
Jul 31, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	54 min
Jul 31, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Chester	65 min
Jul 31, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	57 min
Jul 31, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	59 min
Aug 2, 7:30 AM EDT	Severe Thunderstorm Warning	CTP	Adams, York	60 min
Aug 2, 8:29 AM EDT	Severe Thunderstorm Warning	CTP	Adams, Dauphin, Lancaster, Lebanon, York	61 min
Aug 2, 10:08 AM EDT	Severe Thunderstorm Warning	PHI	Chester	67 min
Aug 2, 10:24 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	66 min
Aug 2, 10:53 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	67 min
Aug 2, 11:14 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Montgomery, Northampton	61 min
Aug 2, 11:25 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	65 min
Aug 2, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Bucks	57 min
Aug 4, 5:31 PM EDT	Severe Thunderstorm Warning	CLE	Erie	44 min
Aug 9, 2:20 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Tioga	70 min
Aug 9, 2:26 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	79 min
Aug 9, 3:01 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Tioga	59 min
Aug 9, 3:28 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	46 min
Aug 9, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, McKean, Potter	62 min
Aug 9, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Columbia, Lycoming, Montour, Northumberland and 4 more	43 min
Aug 9, 4:10 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Luzerne, Wyoming	53 min
Aug 9, 4:25 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Juniata, Lebanon, Montour, Northumberland and 4 more	65 min
Aug 9, 4:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	90 min
Aug 9, 4:41 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	64 min
Aug 9, 5:11 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry, York	49 min
Aug 9, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	76 min
Aug 9, 5:19 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	56 min
Aug 9, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Chester	82 min
Aug 9, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	32 min
Aug 9, 5:59 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	46 min
Aug 9, 6:10 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	80 min
Aug 10, 12:09 AM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Tioga, Warren	81 min
Aug 10, 2:38 PM EDT	Severe Thunderstorm Warning	CLE	Erie	67 min
Aug 10, 3:37 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	53 min
Aug 10, 4:11 PM EDT	Severe Thunderstorm Warning	CTP	McKean	64 min
Aug 10, 4:24 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	66 min
Aug 10, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	63 min
Aug 10, 4:47 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	58 min
Aug 10, 4:53 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer	37 min
Aug 10, 5:17 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Forest, Venango	43 min
Aug 10, 5:23 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	52 min
Aug 10, 5:31 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna	44 min
Aug 10, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	44 min
Aug 10, 6:12 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna, Wayne	63 min
Aug 10, 6:24 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	66 min
Aug 10, 6:39 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	66 min
Aug 10, 6:54 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Wayne	66 min
Aug 11, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	43 min
Aug 11, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	34 min
Aug 11, 4:21 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	54 min
Aug 18, 12:51 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	54 min
Aug 18, 3:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	61 min
Aug 18, 3:52 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	53 min
Aug 18, 4:01 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Snyder	59 min
Aug 18, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	57 min
Aug 18, 4:23 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry	52 min
Aug 18, 4:44 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	46 min
Aug 18, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	56 min
Aug 18, 4:50 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder, Union	55 min
Aug 18, 4:57 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, York	78 min
Aug 18, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	55 min
Aug 18, 5:25 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Sullivan	80 min
Aug 18, 5:35 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lebanon, Northumberland, Schuylkill	70 min
Aug 18, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Berks	60 min
Aug 18, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	51 min
Aug 18, 6:02 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	88 min
Aug 18, 6:48 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	72 min
Aug 18, 7:22 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	53 min
Aug 18, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	68 min
Aug 18, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	70 min
Aug 19, 2:19 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	41 min
Aug 19, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	56 min
Aug 19, 3:36 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	54 min
Aug 19, 4:34 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	56 min
Aug 19, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	55 min
Aug 19, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	37 min
Aug 19, 5:33 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry, York	57 min
Aug 19, 6:31 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, York	59 min
Aug 20, 2:40 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder	50 min
Aug 20, 3:15 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Northumberland, Perry, Schuylkill	60 min
Aug 20, 3:52 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	53 min
Aug 20, 4:38 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	52 min
Aug 20, 6:28 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	62 min
Aug 20, 7:03 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	72 min
Aug 20, 7:37 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	53 min
Aug 20, 7:44 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence	61 min
Aug 20, 7:50 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	55 min
Aug 20, 8:06 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Greene, Washington	54 min
Aug 20, 8:18 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	57 min
Aug 20, 8:37 PM EDT	Severe Thunderstorm Warning	CTP	McKean	53 min
Aug 21, 11:32 AM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Perry, York	58 min
Aug 21, 12:06 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Dauphin, Lancaster, York	54 min
Aug 21, 12:15 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	75 min
Aug 21, 12:18 PM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	42 min
Aug 21, 12:20 PM EDT	Severe Thunderstorm Warning	PHI	Berks	55 min
Aug 21, 12:41 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	49 min
Aug 21, 12:48 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	57 min
Aug 21, 12:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	35 min
Aug 21, 1:16 PM EDT	Severe Thunderstorm Warning	PHI	Berks	59 min
Aug 21, 1:27 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	63 min
Aug 21, 1:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	76 min
Aug 21, 1:40 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	35 min
Aug 21, 1:48 PM EDT	Severe Thunderstorm Warning	BGM	Pike	57 min
Aug 21, 1:52 PM EDT	Severe Thunderstorm Warning	PHI	Chester	68 min
Aug 21, 1:55 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	65 min
Aug 21, 2:01 PM EDT	Severe Thunderstorm Warning	BGM	Pike	44 min
Aug 21, 2:23 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	21 min
Sep 28, 5:54 AM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	51 min
Sep 28, 4:25 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	65 min
Oct 24, 6:28 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Dec 3, 3:31 AM EST	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clinton, Huntingdon, Lycoming, Mifflin and 2 more	29 min
Dec 3, 4:48 AM EST	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Schuylkill, Sullivan	42 min
Dec 3, 5:41 AM EST	Severe Thunderstorm Warning	PHI	Bucks, Carbon, Lehigh, Monroe, Montgomery, Northampton	49 min
Dec 9, 12:18 PM EST	Severe Thunderstorm Warning	PBZ	Venango	27 min
Dec 9, 1:04 PM EST	Severe Thunderstorm Warning	CTP	Warren	56 min
Dec 9, 1:05 PM EST	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	25 min
Dec 9, 1:07 PM EST	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	53 min
Dec 9, 1:09 PM EST	Severe Thunderstorm Warning	PBZ	Forest, Venango	21 min
Dec 9, 1:29 PM EST	Severe Thunderstorm Warning	PBZ	Fayette, Indiana, Westmoreland	31 min
Dec 9, 1:31 PM EST	Severe Thunderstorm Warning	CTP	Elk, McKean, Warren	59 min
Dec 9, 1:49 PM EST	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Somerset	41 min
Dec 9, 3:05 PM EST	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	40 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 2008 2010

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.