Weather alerts in Pennsylvania, December 2011

61 weather alerts in December 2011, 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 2011. Tap one for its archive.

Alerts: 61
Warnings: 17
Watches: 6
Advisories: 18
Busiest day: December 7, 201114 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
Dec 4, 10:44 PM EST	Dense Fog Advisory	PHI	Delaware, Philadelphia	11 hr
Dec 6, 2:11 PM EST	Winter Storm Watch	CTP	Schuylkill, Somerset	15 hr
Dec 6, 3:10 PM EST	Flood Watch	PHI	Berks, Delaware, Lehigh, Northampton, Philadelphia	36 hr
Dec 6, 3:10 PM EST	Winter Storm Watch	PHI	Carbon, Monroe	13 hr
Dec 6, 4:02 PM EST	Winter Storm Warning	PBZ	Fayette, Westmoreland	29 hr
Dec 7, 2:35 AM EST	Winter Weather Advisory	PBZ	Fayette, Greene, Westmoreland	17 hr
Dec 7, 4:12 AM EST	Winter Storm Warning	PHI	Carbon, Monroe	23 hr
Dec 7, 4:12 AM EST	Winter Weather Advisory	PHI	Berks, Lehigh, Northampton	23 hr
Dec 7, 4:18 AM EST	Flood Watch	CTP	Lancaster, Lebanon, York	20 hr
Dec 7, 4:33 AM EST	Winter Weather Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	22 hr
Dec 7, 4:51 AM EST	Winter Storm Warning	CTP	Schuylkill, Somerset	20 hr
Dec 7, 4:51 AM EST	Winter Weather Advisory	CTP	Adams, Bedford, Blair, Cambria, Centre, Clearfield and 20 more	20 hr
Dec 7, 6:51 AM EST	Areal Flood Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	4 hr
Dec 7, 10:53 AM EST	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	3 hr
Dec 7, 2:44 PM EST	Mesoscale Discussion	SPC	Bedford, Fayette, Somerset	3 hr
Dec 7, 4:37 PM EST	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Dec 7, 4:53 PM EST	Areal Flood Advisory	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 2 more	3 hr
Dec 7, 6:21 PM EST	Mesoscale Discussion	SPC	Bradford, Carbon, Columbia, Cumberland, Dauphin, Franklin and 20 more	4 hr
Dec 7, 6:25 PM EST	Areal Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	8 hr
Dec 7, 8:04 PM EST	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	18 hr
Dec 7, 9:41 PM EST	River Flood Warning	PHI	Delaware	5 hr
Dec 7, 10:12 PM EST	River Flood Warning	PHI	Bucks	12 hr
Dec 7, 10:25 PM EST	Mesoscale Discussion	SPC	Lackawanna, Pike, Wayne	4 hr
Dec 7, 11:40 PM EST	River Flood Warning	PHI	Chester	8 hr
Dec 8, 1:58 AM EST	Areal Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	5 hr
Dec 8, 2:21 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	10 hr
Dec 8, 2:51 AM EST	River Flood Warning	PHI	Chester, Delaware	13 hr
Dec 8, 3:17 AM EST	River Flood Warning	CTP	Huntingdon	9 hr
Dec 8, 3:30 PM EST	Winter Weather Advisory	CLE	Crawford, Erie	19 hr
Dec 8, 6:09 PM EST	River Flood Warning	CTP	Cumberland	13 hr
Dec 9, 3:45 AM EST	Lake Effect Snow Advisory	CTP	Warren	14 hr
Dec 9, 10:03 AM EST	Lake Effect Snow Advisory	CLE	Crawford, Erie	24 hr
Dec 15, 4:51 PM EST	Special Weather Statement	PBZ	Allegheny, Armstrong, Butler, Clarion, Indiana, Jefferson and 1 more	69 min
Dec 15, 6:19 PM EST	Special Weather Statement	PBZ	Fayette, Greene, Indiana, Washington, Westmoreland	86 min
Dec 15, 7:09 PM EST	Special Weather Statement	CTP	Centre	36 min
Dec 16, 5:20 AM EST	Wind Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Dec 18, 9:22 AM EST	Lake Effect Snow Advisory	CLE	Erie	4 hr
Dec 21, 3:10 PM EST	Special Weather Statement	PBZ	Washington	50 min
Dec 21, 3:49 PM EST	Special Weather Statement	PBZ	Indiana, Westmoreland	26 min
Dec 21, 4:18 PM EST	Special Weather Statement	PBZ	Indiana, Westmoreland	42 min
Dec 21, 4:22 PM EST	Special Weather Statement	CTP	Clearfield	53 min
Dec 21, 4:40 PM EST	Special Weather Statement	PBZ	Beaver	65 min
Dec 21, 5:06 PM EST	Special Weather Statement	CTP	Cambria	54 min
Dec 21, 5:06 PM EST	Special Weather Statement	PBZ	Westmoreland	24 min
Dec 21, 5:28 PM EST	Special Weather Statement	PBZ	Fayette	32 min
Dec 21, 5:42 PM EST	Special Weather Statement	PBZ	Butler, Clarion, Jefferson	48 min
Dec 21, 9:54 PM EST	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	51 min
Dec 21, 10:34 PM EST	Special Weather Statement	PHI	Delaware, Philadelphia	41 min
Dec 23, 3:18 AM EST	Areal Flood Warning	PHI	Chester	3 hr
Dec 23, 6:27 AM EST	Areal Flood Warning	PHI	Bucks, Montgomery, Philadelphia	93 min
Dec 26, 3:13 PM EST	Flood Watch	PHI	Delaware, Philadelphia	30 hr
Dec 27, 3:37 AM EST	Lake Effect Snow Watch	CLE	Crawford, Erie	12 hr
Dec 27, 3:37 AM EST	Winter Weather Advisory	CLE	Crawford, Erie	27 hr
Dec 27, 4:15 AM EST	Winter Weather Advisory	CTP	Cambria, Elk, McKean, Somerset, Warren	29 hr
Dec 27, 4:21 AM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more	24 hr
Dec 27, 1:20 PM EST	Coastal Flood Statement	PHI	Delaware, Philadelphia	4 hr
Dec 27, 6:01 PM EST	Areal Flood Warning	PHI	Chester	3 hr
Dec 27, 6:08 PM EST	Special Weather Statement	PHI	Philadelphia	52 min
Dec 27, 7:12 PM EST	Special Weather Statement	PHI	Philadelphia	108 min
Dec 27, 7:55 PM EST	Areal Flood Warning	PHI	Delaware	94 min
Dec 28, 4:28 AM EST	Wind Advisory	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	14 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
Mesoscale Discussion	3
Special Weather Statement	16
Flooding
Areal Flood Warning	7
River Flood Warning	7
Flood Watch	3
Areal Flood Advisory	4
Winter
Winter Storm Warning	3
Lake Effect Snow Watch	1
Winter Storm Watch	2
Lake Effect Snow Advisory	3
Winter Weather Advisory	8
Wind and dust
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	1
Coast and beach
Coastal Flood Statement	1

By county

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

25 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2010 2012

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.