Weather alerts in Pennsylvania, December 2009

147 weather alerts in December 2009, 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 December 2009. Tap one for its archive.

Alerts: 147
Warnings: 40
Watches: 12
Advisories: 57
Busiest day: December 9, 200938 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
Nov 30, 8:41 PM EST	Special Weather Statement	CTP	Clearfield	34 min
Dec 2, 2:25 AM EST	Wind Advisory	PBZ	Jefferson	32 hr
Dec 2, 9:09 PM EST	Wind Advisory	CTP	Cambria, Somerset	13 hr
Dec 3, 1:46 AM EST	Special Weather Statement	CTP	Bedford, Cambria, Somerset	59 min
Dec 3, 2:37 AM EST	Special Weather Statement	CTP	Bedford, Blair, Cambria, Clearfield, Fulton, Huntingdon	38 min
Dec 3, 3:31 AM EST	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clinton, Huntingdon, Lycoming, Mifflin and 2 more	29 min
Dec 3, 3:58 AM EST	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Juniata, Lancaster, Lebanon and 7 more	47 min
Dec 3, 4:47 AM EST	Special Weather Statement	CTP	Lancaster, Schuylkill	28 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 3, 6:29 AM EST	Areal Flood Warning	PHI	Montgomery	106 min
Dec 3, 8:49 AM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	4 hr
Dec 4, 7:57 PM EST	Winter Weather Advisory	PBZ		21 hr
Dec 5, 3:25 AM EST	Winter Weather Advisory	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	19 hr
Dec 5, 4:27 AM EST	Winter Weather Advisory	CTP	Adams, Bedford, Blair, Cambria, Centre, Clinton and 20 more	14 hr
Dec 5, 4:24 PM EST	Winter Weather Advisory	BGM	Pike, Wayne	5 hr
Dec 5, 5:17 PM EST	Special Weather Statement	CTP	Lancaster, Lebanon, Schuylkill, York	58 min
Dec 7, 2:41 PM EST	Winter Storm Watch	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 14 more	21 hr
Dec 7, 2:41 PM EST	Winter Storm Watch	PBZ	Forest, Jefferson	24 hr
Dec 8, 3:05 AM EST	Winter Weather Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	30 hr
Dec 8, 4:01 AM EST	High Wind Watch	CLE	Crawford, Erie	11 hr
Dec 8, 4:17 AM EST	Winter Weather Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	30 hr
Dec 8, 6:12 AM EST	Winter Weather Advisory	CTP	Bedford, Blair, Cameron, Centre, Clearfield, Clinton and 19 more	26 hr
Dec 8, 11:13 AM EST	Winter Storm Warning	CTP	Cambria, McKean, Potter, Somerset	21 hr
Dec 8, 1:57 PM EST	High Wind Watch	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more	14 hr
Dec 8, 2:35 PM EST	Winter Storm Warning	PBZ		15 hr
Dec 8, 2:35 PM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 4 more	18 hr
Dec 8, 2:39 PM EST	High Wind Warning	CLE	Crawford, Erie	31 hr
Dec 8, 2:40 PM EST	Flash Flood Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	21 hr
Dec 8, 2:42 PM EST	Wind Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more	22 hr
Dec 8, 2:52 PM EST	Winter Weather Advisory	CLE	Crawford, Erie	13 hr
Dec 8, 11:32 PM EST	Mesoscale Discussion	SPC	Bradford, Cameron, Clinton, Columbia, Elk, Forest and 14 more	6 hr
Dec 9, 3:29 AM EST	Flood Watch	CTP	Adams, Lancaster, Lebanon, York	9 hr
Dec 9, 3:38 AM EST	Wind Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	26 hr
Dec 9, 3:39 AM EST	Lake Effect Snow Watch	CLE	Crawford, Erie	35 hr
Dec 9, 6:53 AM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	8 hr
Dec 9, 7:47 AM EST	Areal Flood Warning	PHI	Bucks, Chester, Montgomery	7 hr
Dec 9, 8:16 AM EST	River Flood Warning	PHI	Bucks	12 hr
Dec 9, 8:25 AM EST	River Flood Warning	PHI	Delaware	5 hr
Dec 9, 9:58 AM EST	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Dec 9, 10:19 AM EST	River Flood Warning	PHI	Chester	7 hr
Dec 9, 10:35 AM EST	Wind Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	41 hr
Dec 9, 10:40 AM EST	River Flood Warning	PHI	Chester, Delaware	13 hr
Dec 9, 11:02 AM EST	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 11 more	88 min
Dec 9, 11:36 AM EST	River Flood Warning	PHI	Montgomery	5 hr
Dec 9, 11:41 AM EST	River Flood Advisory	PBZ	Allegheny	21 hr
Dec 9, 12:00 PM EST	Wind Advisory	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	33 hr
Dec 9, 12:18 PM EST	Severe Thunderstorm Warning	PBZ	Venango	27 min
Dec 9, 12:30 PM EST	Tornado Warning	PBZ	Venango	30 min
Dec 9, 1:00 PM EST	High Wind Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more	8 hr
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, 1:15 PM EST	Areal Flood Warning	PHI	Berks	4 hr
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, 1:41 PM EST	Special Weather Statement	CTP	Clearfield	49 min
Dec 9, 1:49 PM EST	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Somerset	41 min
Dec 9, 2:26 PM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	7 hr
Dec 9, 2:51 PM EST	Special Weather Statement	CTP	Centre, Clinton, Lycoming, Mifflin	39 min
Dec 9, 2:54 PM EST	Lake Effect Snow Warning	CLE	Crawford, Erie	53 hr
Dec 9, 2:55 PM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	7 hr
Dec 9, 3:05 PM EST	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	40 min
Dec 9, 3:27 PM EST	Special Weather Statement	CTP	Clearfield, Elk	33 min
Dec 9, 3:52 PM EST	Special Weather Statement	CTP	Cambria	38 min
Dec 9, 3:57 PM EST	Special Weather Statement	CTP	Cameron	33 min
Dec 9, 4:05 PM EST	Special Weather Statement	CTP	Blair, Huntingdon	40 min
Dec 9, 4:23 PM EST	Special Weather Statement	CTP	Centre, Clinton	37 min
Dec 10, 10:34 AM EST	Mesoscale Discussion	SPC	Erie	6 hr
Dec 10, 2:41 PM EST	Wind Chill Advisory	PBZ	Armstrong, Clarion, Forest, Jefferson	18 hr
Dec 10, 7:05 PM EST	Mesoscale Discussion	SPC	Erie	4 hr
Dec 10, 9:49 PM EST	Wind Chill Advisory	CTP	Cambria, Cameron, Centre, Clearfield, Clinton, Elk and 7 more	10 hr
Dec 11, 4:04 AM EST	Lake Effect Snow Warning	CTP	Warren	18 hr
Dec 11, 4:04 AM EST	Lake Effect Snow Advisory	CTP	McKean	18 hr
Dec 11, 9:27 PM EST	Mesoscale Discussion	SPC	Warren	4 hr
Dec 12, 2:29 PM EST	Winter Weather Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	23 hr
Dec 12, 2:48 PM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more	22 hr
Dec 12, 3:17 PM EST	Freezing Rain Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	25 hr
Dec 13, 5:07 AM EST	Freezing Rain Advisory	CLE	Crawford, Erie	4 hr
Dec 13, 5:16 AM EST	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 23 more	4 hr
Dec 13, 9:21 AM EST	Freezing Rain Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	6 hr
Dec 13, 11:25 AM EST	Winter Weather Advisory	PBZ	Armstrong, Beaver, Butler, Lawrence, Mercer	35 min
Dec 13, 1:50 PM EST	Freezing Rain Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	4 hr
Dec 15, 7:59 PM EST	Special Weather Statement	CTP	Sullivan	91 min
Dec 15, 8:35 PM EST	Special Weather Statement	CTP	Blair, Cambria	55 min
Dec 15, 8:48 PM EST	Special Weather Statement	CTP	Centre	57 min
Dec 15, 9:47 PM EST	Special Weather Statement	CTP	Blair, Cambria, Cumberland, Huntingdon	43 min
Dec 17, 5:37 AM EST	Special Weather Statement	CTP	Bradford	38 min
Dec 17, 3:30 PM EST	Winter Storm Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	22 hr
Dec 17, 10:08 PM EST	Winter Storm Watch	CTP	Adams, Bedford, Blair, Cambria, Centre, Clearfield and 21 more	17 hr
Dec 18, 3:06 AM EST	Winter Storm Watch	PBZ	Allegheny, Armstrong, Greene, Washington	9 hr
Dec 18, 3:06 AM EST	Winter Storm Warning	PBZ	Greene	48 hr
Dec 18, 4:00 AM EST	Winter Storm Watch	BGM	Lackawanna, Luzerne, Pike, Wayne, Wyoming	11 hr
Dec 18, 4:40 AM EST	Winter Storm Warning	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	46 hr
Dec 18, 11:46 AM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Greene and 2 more	36 hr
Dec 18, 2:38 PM EST	Winter Storm Warning	CTP	Adams, Bedford, Blair, Cambria, Centre, Columbia and 17 more	32 hr
Dec 18, 2:38 PM EST	Winter Weather Advisory	CTP	Bedford, Blair, Cambria, Centre, Clearfield, Clinton and 11 more	32 hr
Dec 18, 2:44 PM EST	Winter Weather Advisory	BGM	Lackawanna, Luzerne, Pike, Wayne	36 hr
Dec 19, 12:34 AM EST	Mesoscale Discussion	SPC	Adams, Chester, Delaware, Franklin, Fulton, Lancaster and 1 more	5 hr
Dec 19, 6:57 AM EST	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Bucks, Chester, Cumberland and 10 more	6 hr
Dec 19, 12:27 PM EST	Mesoscale Discussion	SPC	Adams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more	6 hr
Dec 19, 7:25 PM EST	Mesoscale Discussion	SPC	Bucks, Chester, Delaware, Montgomery, Philadelphia	5 hr
Dec 24, 2:05 PM EST	Winter Weather Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	29 hr
Dec 24, 2:20 PM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more	22 hr
Dec 24, 3:04 PM EST	Freezing Rain Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	42 hr
Dec 24, 4:02 PM EST	Freezing Rain Advisory	CLE	Crawford, Erie	22 hr
Dec 24, 4:07 PM EST	Winter Weather Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	41 hr
Dec 25, 2:51 AM EST	Wind Advisory	PBZ		17 hr
Dec 25, 4:27 AM EST	Freezing Rain Advisory	BGM	Pike, Wayne	34 hr
Dec 25, 7:14 AM EST	Winter Storm Warning	PBZ	Clarion, Forest, Jefferson, Mercer, Venango	9 hr
Dec 25, 7:50 AM EST	Mesoscale Discussion	SPC	Armstrong, Bedford, Blair, Cambria, Cameron, Centre and 13 more	4 hr
Dec 25, 1:15 PM EST	Wind Advisory	CLE	Erie	7 hr
Dec 25, 2:57 PM EST	Wind Advisory	CTP	Cambria, Somerset	8 hr
Dec 26, 12:37 AM EST	Mesoscale Discussion	SPC	Wayne	4 hr
Dec 26, 7:42 AM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	15 hr
Dec 26, 8:56 AM EST	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, York	6 hr
Dec 26, 10:28 AM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	20 hr
Dec 26, 12:31 PM EST	River Flood Warning	PHI	Chester	12 hr
Dec 26, 12:34 PM EST	River Flood Warning	PHI	Delaware	9 hr
Dec 26, 2:42 PM EST	River Flood Warning	PHI	Bucks	20 hr
Dec 26, 2:45 PM EST	River Flood Warning	PHI	Chester, Delaware	17 hr
Dec 26, 5:25 PM EST	Areal Flood Advisory	CTP	Adams, York	6 hr
Dec 26, 10:58 PM EST	Special Weather Statement	CTP	Bedford, Blair, Cambria, Cameron, Clearfield, Elk and 5 more	4 hr
Dec 26, 11:25 PM EST	Areal Flood Advisory	CTP	Adams, York	3 hr
Dec 27, 4:18 AM EST	Lake Effect Snow Watch	CLE	Crawford, Erie	11 hr
Dec 27, 3:28 PM EST	Lake Effect Snow Warning	CLE	Crawford, Erie	44 hr
Dec 27, 3:49 PM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more	43 hr
Dec 27, 3:58 PM EST	Winter Weather Advisory	CTP	Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 9 more	14 hr
Dec 28, 5:31 AM EST	Lake Effect Snow Advisory	CTP	Warren	17 hr
Dec 28, 5:53 AM EST	Special Weather Statement	CTP	Clinton	37 min
Dec 28, 11:53 AM EST	Winter Weather Advisory	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more	24 hr
Dec 28, 1:42 PM EST	Wind Advisory	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	27 hr
Dec 28, 2:33 PM EST	Wind Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	28 hr
Dec 28, 3:08 PM EST	Wind Advisory	BGM	Lackawanna, Luzerne, Pike, Wayne, Wyoming	24 hr
Dec 28, 10:59 PM EST	Lake Effect Snow Warning	CTP	Warren	13 hr
Dec 29, 1:38 AM EST	Special Weather Statement	CTP	Centre	52 min
Dec 29, 2:33 AM EST	Special Weather Statement	CTP	Centre	57 min
Dec 29, 3:32 AM EST	Special Weather Statement	CTP	Centre	58 min
Dec 29, 4:25 AM EST	Special Weather Statement	CTP	Centre	50 min
Dec 29, 5:24 AM EST	Special Weather Statement	CTP	Mifflin	81 min
Dec 29, 6:33 AM EST	Special Weather Statement	CTP	Blair	57 min
Dec 29, 11:42 AM EST	Lake Effect Snow Advisory	CLE	Crawford, Erie	4 hr
Dec 30, 2:45 PM EST	Winter Weather Advisory	CTP	Adams, Bedford, Blair, Cambria, Cumberland, Dauphin and 10 more	19 hr
Dec 31, 3:22 AM EST	Winter Weather Advisory	PHI	Berks, Delaware, Lehigh, Northampton, Philadelphia	8 hr
Dec 31, 6:40 PM EST	Winter Weather Advisory	CTP	Adams, Bedford, Blair, Centre, Clinton, Columbia and 17 more	6 hr
Dec 31, 6:46 PM EST	Winter Weather Advisory	PHI	Berks, Lehigh, Northampton	6 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	12
Tornado Warning	1
Mesoscale Discussion	12
Special Weather Statement	26
Flooding
Areal Flood Warning	6
River Flood Warning	9
Flash Flood Watch	1
Flood Watch	1
Areal Flood Advisory	4
River Flood Advisory	1
Winter
Lake Effect Snow Warning	4
Winter Storm Warning	6
Lake Effect Snow Watch	2
Winter Storm Watch	6
Freezing Rain Advisory	7
Lake Effect Snow Advisory	3
Winter Weather Advisory	25
Cold
Wind Chill Advisory	2
Wind and dust
High Wind Warning	2
High Wind Watch	2
Wind Advisory	12
Coast and beach
Coastal Flood Advisory	3

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 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. Rebuilt daily.