Weather alerts in Pennsylvania, May 2007

117 weather alerts in May 2007, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in May 2007. Tap one for its archive.

Alerts: 117
Warnings: 79
Watches: 8
Advisories: 16
Busiest day: May 10, 200723 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

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
May 1, 3:53 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Indiana and 4 more	97 min
May 1, 4:22 PM EDT	Severe Thunderstorm Watch	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 9 more	7 hr
May 1, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence	31 min
May 1, 5:23 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	37 min
May 1, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	39 min
May 1, 5:47 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	58 min
May 1, 5:50 PM EDT	Tornado Warning	CLE	Crawford	40 min
May 1, 5:50 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong	55 min
May 1, 5:56 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	48 min
May 1, 6:10 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	53 min
May 1, 6:23 PM EDT	Tornado Warning	PBZ	Mercer	20 min
May 1, 6:24 PM EDT	Tornado Warning	PBZ	Venango	36 min
May 1, 6:26 PM EDT	Severe Thunderstorm Warning	CLE	Erie	64 min
May 1, 6:31 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	44 min
May 1, 6:33 PM EDT	Tornado Warning	PBZ	Clarion	27 min
May 1, 6:35 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 37 more	85 min
May 1, 6:50 PM EDT	Tornado Warning	PBZ	Armstrong, Butler, Clarion	40 min
May 1, 6:53 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	37 min
May 1, 6:56 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	34 min
May 1, 7:16 PM EDT	Tornado Warning	PBZ	Jefferson	44 min
May 1, 7:27 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	63 min
May 1, 7:56 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	64 min
May 1, 8:07 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	53 min
May 3, 3:06 PM EDT	Frost Advisory	CTP	Dauphin, Juniata, Lebanon, Perry, Schuylkill	18 hr
May 3, 3:30 PM EDT	Frost Advisory	PHI	Carbon, Monroe	17 hr
May 5, 1:46 PM EDT	Fire Weather Watch	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	13 hr
May 5, 2:23 PM EDT	Fire Weather Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	11 hr
May 5, 2:31 PM EDT	Red Flag Warning	CTP	Cameron, Clinton, Elk, Lycoming, McKean, Potter and 3 more	5 hr
May 5, 3:28 PM EDT	Fire Weather Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	11 hr
May 6, 1:25 AM EDT	Red Flag Warning	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	18 hr
May 6, 1:47 AM EDT	Frost Advisory	BGM	Luzerne	30 hr
May 6, 2:02 AM EDT	Red Flag Warning	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	18 hr
May 6, 2:43 AM EDT	Frost Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	29 hr
May 6, 2:58 AM EDT	Frost Advisory	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Fulton and 12 more	30 hr
May 6, 3:07 AM EDT	Red Flag Warning	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	16 hr
May 7, 2:27 PM EDT	Frost Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	18 hr
May 9, 8:40 PM EDT	Dense Fog Advisory	PHI	Delaware, Philadelphia	12 hr
May 10, 11:48 AM EDT	Mesoscale Discussion	SPC	Bradford, Centre, Clinton, Columbia, Cumberland, Dauphin and 17 more	117 min
May 10, 12:17 PM EDT	Severe Thunderstorm Watch	SPC	Blair, Bradford, Centre, Clinton, Columbia, Cumberland and 21 more	8 hr
May 10, 12:55 PM EDT	Severe Thunderstorm Warning	CTP	Potter	65 min
May 10, 1:07 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	53 min
May 10, 1:18 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	57 min
May 10, 1:37 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	53 min
May 10, 2:04 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	41 min
May 10, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	93 min
May 10, 2:23 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	97 min
May 10, 2:37 PM EDT	Tornado Warning	BGM	Susquehanna	38 min
May 10, 3:02 PM EDT	Severe Thunderstorm Warning	CTP	Union	73 min
May 10, 3:08 PM EDT	Severe Thunderstorm Warning	CTP	Centre	37 min
May 10, 3:12 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	48 min
May 10, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Snyder	72 min
May 10, 4:25 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	50 min
May 10, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	34 min
May 10, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	37 min
May 10, 5:38 PM EDT	Severe Thunderstorm Warning	CTP	Perry	37 min
May 10, 5:45 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	60 min
May 10, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	65 min
May 10, 6:28 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Bradford, Bucks, Carbon and 32 more	92 min
May 10, 6:59 PM EDT	Flash Flood Warning	CTP	Cumberland	3 hr
May 10, 9:32 PM EDT	Flash Flood Warning	CTP	Franklin	3 hr
May 11, 3:17 AM EDT	Dense Fog Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	5 hr
May 12, 3:59 PM EDT	Severe Thunderstorm Warning	CTP	Perry	42 min
May 12, 5:24 PM EDT	Severe Thunderstorm Warning	PHI	Chester	36 min
May 12, 6:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester	59 min
May 12, 6:45 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
May 13, 2:44 AM EDT	Frost Advisory	BGM	Luzerne	28 hr
May 13, 3:44 AM EDT	Frost Advisory	CLE	Crawford, Erie	28 hr
May 13, 4:09 AM EDT	Frost Advisory	CTP	Adams, Bedford, Blair, Centre, Clinton, Columbia and 17 more	29 hr
May 13, 4:22 AM EDT	Frost Advisory	PHI	Carbon, Monroe	28 hr
May 13, 2:35 PM EDT	Frost Advisory	PBZ	Armstrong, Butler, Clarion, Forest, Jefferson, Lawrence and 2 more	17 hr
May 13, 11:31 PM EDT	Freeze Warning	CLE	Crawford, Erie	8 hr
May 14, 3:51 PM EDT	Fire Weather Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	21 hr
May 16, 12:46 AM EDT	Mesoscale Discussion	SPC	Allegheny, Beaver, Butler, Lawrence, Washington	59 min
May 16, 11:57 AM EDT	Mesoscale Discussion	SPC	Monroe, Pike, Wayne	93 min
May 16, 12:56 PM EDT	Mesoscale Discussion	SPC	Adams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more	64 min
May 16, 1:26 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Berks, Bucks, Carbon, Chester, Delaware and 9 more	7 hr
May 16, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	York	45 min
May 16, 2:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	42 min
May 16, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	49 min
May 16, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery, Philadelphia	45 min
May 16, 3:46 PM EDT	Mesoscale Discussion	SPC	Adams, Berks, Bucks, Carbon, Chester, Delaware and 10 more	89 min
May 16, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Chester	44 min
May 16, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	40 min
May 16, 4:53 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	52 min
May 18, 4:55 AM EDT	Coastal Flood Advisory	PHI	Delaware, Philadelphia	22 hr
May 18, 2:34 PM EDT	Frost Advisory	CLE	Crawford, Erie	16 hr
May 21, 2:24 AM EDT	Frost Advisory	BGM	Bradford, Susquehanna, Wayne	29 hr
May 25, 1:18 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 12 more	2 hr
May 25, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	29 min
May 25, 7:45 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	44 min
May 26, 3:34 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	41 min
May 26, 5:18 PM EDT	Severe Thunderstorm Warning	CTP	Snyder	57 min
May 26, 6:35 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	38 min
May 27, 12:45 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 10 more	90 min
May 27, 1:12 PM EDT	Mesoscale Discussion	SPC	Bradford, Cameron, Centre, Clearfield, Clinton, Elk and 12 more	93 min
May 27, 1:52 PM EDT	Severe Thunderstorm Watch	SPC	Allegheny, Armstrong, Beaver, Bedford, Blair, Bradford and 40 more	6 hr
May 27, 2:54 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland	25 min
May 27, 3:01 PM EDT	Severe Thunderstorm Warning	CTP	Montour	29 min
May 27, 4:30 PM EDT	Mesoscale Discussion	SPC	Adams, Cumberland, Dauphin, Franklin, Juniata, Perry and 1 more	60 min
May 27, 6:01 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	59 min
May 27, 6:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	57 min
May 27, 6:56 PM EDT	Mesoscale Discussion	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 49 more	2 hr
May 27, 7:23 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	67 min
May 27, 7:24 PM EDT	Severe Thunderstorm Warning	CTP	York	66 min
May 27, 7:46 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	59 min
May 27, 7:52 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	68 min
May 27, 8:18 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	57 min
May 27, 9:10 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	50 min
May 27, 9:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	63 min
May 31, 2:01 PM EDT	Mesoscale Discussion	SPC	Adams, Fulton, York	89 min
May 31, 2:53 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	44 min
May 31, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	40 min
May 31, 6:09 PM EDT	Flash Flood Warning	PHI	Monroe	2 hr
May 31, 6:48 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	27 min
May 31, 7:00 PM EDT	Flash Flood Warning	PBZ	Allegheny	90 min
May 31, 7:10 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	35 min
May 31, 7:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	51 min

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	62
Tornado Warning	7
Severe Thunderstorm Watch	4
Mesoscale Discussion	14
Flooding
Flash Flood Warning	5
Cold
Freeze Warning	1
Frost Advisory	13
Fire
Red Flag Warning	4
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	2
Coast and beach
Coastal Flood Advisory	1

By county

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

27 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2006 2008

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. Rebuilt daily.