Weather alerts in Pennsylvania, April 2007

74 weather alerts in April 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 April 2007. Tap one for its archive.

Alerts: 74
Warnings: 34
Watches: 13
Advisories: 21
Busiest day: April 23, 200710 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
Apr 1, 3:06 PM EDT	Mesoscale Discussion	SPC	Beaver, Crawford, Lawrence, Mercer	84 min
Apr 1, 3:07 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	38 min
Apr 1, 3:51 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	39 min
Apr 1, 8:10 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	35 min
Apr 1, 8:32 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	28 min
Apr 1, 9:02 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 14 more	118 min
Apr 5, 3:26 AM EDT	Lake Effect Snow Advisory	CLE	Crawford, Erie	36 hr
Apr 5, 9:45 AM EDT	Lake Effect Snow Warning	CLE	Crawford, Erie	17 hr
Apr 5, 1:34 PM EDT	Lake Effect Snow Advisory	CTP	McKean, Warren	20 hr
Apr 5, 2:52 PM EDT	Lake Effect Snow Advisory	PBZ	Forest, Mercer, Venango	19 hr
Apr 6, 2:01 PM EDT	Lake Effect Snow Advisory	CTP	McKean, Warren	46 hr
Apr 6, 3:09 PM EDT	Lake Effect Snow Warning	CLE	Crawford, Erie	49 hr
Apr 6, 3:09 PM EDT	Lake Effect Snow Advisory	CLE	Erie	49 hr
Apr 7, 3:22 AM EDT	Lake Effect Snow Advisory	PBZ	Forest, Mercer, Venango	12 hr
Apr 7, 3:22 AM EDT	Snow Advisory	PBZ		12 hr
Apr 7, 4:11 AM EDT	Lake Effect Snow Warning	CTP	Warren	32 hr
Apr 7, 5:32 PM EDT	Lake Effect Snow Advisory	PBZ	Forest, Mercer, Venango	20 hr
Apr 7, 5:32 PM EDT	Snow Advisory	PBZ	Clarion, Greene, Jefferson, Washington	20 hr
Apr 8, 1:01 AM EDT	Snow Advisory	CTP	Centre, Clearfield, Elk	11 hr
Apr 12, 12:05 AM EDT	Wind Advisory	CLE	Erie	4 hr
Apr 13, 11:24 AM EDT	Winter Storm Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	40 hr
Apr 13, 1:39 PM EDT	Winter Storm Watch	CTP	Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 23 more	25 hr
Apr 13, 3:35 PM EDT	Coastal Flood Watch	PHI	Delaware, Philadelphia	13 hr
Apr 13, 3:36 PM EDT	Flood Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	55 hr
Apr 13, 4:04 PM EDT	Winter Storm Watch	PHI	Carbon, Monroe	48 hr
Apr 14, 4:45 AM EDT	Coastal Flood Warning	PHI	Delaware, Philadelphia	53 hr
Apr 14, 3:08 PM EDT	Winter Weather Advisory	CTP	Cambria, Cameron, Columbia, Elk, Lycoming, McKean and 8 more	55 hr
Apr 14, 3:38 PM EDT	Winter Storm Warning	BGM	Bradford, Susquehanna, Wyoming	52 hr
Apr 14, 9:57 PM EDT	Flood Watch	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill and 1 more	24 hr
Apr 15, 3:43 AM EDT	Winter Weather Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne	40 hr
Apr 15, 9:21 AM EDT	Flood Watch	BGM	Lackawanna, Luzerne, Pike, Wayne	25 hr
Apr 15, 3:16 PM EDT	Wind Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	27 hr
Apr 15, 3:21 PM EDT	Wind Advisory	PBZ		27 hr
Apr 15, 3:53 PM EDT	Winter Weather Advisory	PHI	Carbon, Monroe	32 hr
Apr 15, 4:11 PM EDT	Wind Advisory	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	23 hr
Apr 16, 1:24 AM EDT	Heavy Snow Warning	CTP	Lycoming, Sullivan, Tioga	23 hr
Apr 16, 3:23 AM EDT	High Wind Warning	PHI	Berks, Delaware, Lehigh, Philadelphia	16 hr
Apr 16, 3:55 AM EDT	Mesoscale Discussion	SPC	Bradford	3 hr
Apr 16, 1:16 PM EDT	Snow Advisory	PBZ		6 hr
Apr 16, 3:22 PM EDT	Wind Advisory	PHI	Berks, Delaware, Lehigh, Philadelphia	4 hr
Apr 16, 7:37 PM EDT	Winter Storm Warning	CTP	Cambria, Somerset	5 hr
Apr 16, 7:44 PM EDT	Winter Storm Warning	PBZ		6 hr
Apr 18, 9:50 PM EDT	Coastal Flood Advisory	PHI	Delaware, Philadelphia	28 hr
Apr 19, 2:04 PM EDT	Coastal Flood Watch	PHI	Delaware, Philadelphia	8 hr
Apr 19, 9:48 PM EDT	Coastal Flood Warning	PHI	Delaware, Philadelphia	8 hr
Apr 20, 11:27 AM EDT	Frost Advisory	CTP	Adams, Lancaster, York	21 hr
Apr 22, 1:40 PM EDT	Fire Weather Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	14 hr
Apr 22, 1:52 PM EDT	Fire Weather Watch	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Lancaster and 11 more	14 hr
Apr 22, 2:47 PM EDT	Fire Weather Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	12 hr
Apr 23, 2:56 AM EDT	Red Flag Warning	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	17 hr
Apr 23, 3:45 AM EDT	Red Flag Warning	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	15 hr
Apr 23, 4:19 AM EDT	Red Flag Warning	CTP	Adams, Bedford, Blair, Centre, Clinton, Columbia and 19 more	15 hr
Apr 23, 5:03 PM EDT	Mesoscale Discussion	SPC	Crawford, Warren	2 hr
Apr 23, 6:37 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	53 min
Apr 23, 7:06 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	24 min
Apr 23, 7:29 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	31 min
Apr 23, 7:36 PM EDT	Severe Thunderstorm Warning	CTP	McKean	54 min
Apr 23, 7:44 PM EDT	Severe Thunderstorm Warning	PBZ	Venango	61 min
Apr 23, 7:52 PM EDT	Tornado Warning	PBZ	Butler, Mercer, Venango	23 min
Apr 23, 8:14 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	31 min
Apr 23, 8:28 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Jefferson	62 min
Apr 23, 8:29 PM EDT	Tornado Warning	PBZ	Butler	20 min
Apr 23, 8:34 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong	56 min
Apr 23, 8:38 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 17 more	2 hr
Apr 23, 8:42 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	33 min
Apr 23, 9:17 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	58 min
Apr 23, 9:35 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	40 min
Apr 26, 3:26 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Crawford, Fayette and 6 more	64 min
Apr 26, 3:58 PM EDT	Tornado Watch	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 8 more	6 hr
Apr 27, 1:01 AM EDT	Flash Flood Warning	PHI	Chester	3 hr
Apr 27, 1:14 AM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	3 hr
Apr 27, 3:42 AM EDT	Flash Flood Warning	PHI	Bucks, Chester, Montgomery	4 hr
Apr 27, 8:07 AM EDT	Flash Flood Warning	PHI	Bucks, Chester, Montgomery	83 min
Apr 29, 3:09 PM EDT	Fire Weather Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	17 hr

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	15
Tornado Warning	2
Tornado Watch	1
Mesoscale Discussion	6
Flooding
Flash Flood Warning	4
Flood Watch	3
Winter
Heavy Snow Warning	1
Lake Effect Snow Warning	3
Winter Storm Warning	3
Winter Storm Watch	3
Lake Effect Snow Advisory	7
Snow Advisory	4
Winter Weather Advisory	3
Cold
Frost Advisory	1
Wind and dust
High Wind Warning	1
Wind Advisory	5
Fire
Red Flag Warning	3
Fire Weather Watch	4
Coast and beach
Coastal Flood Warning	2
Coastal Flood Watch	2
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. Warning verification from the Mesonet's Cow. Rebuilt daily.