Weather alerts in Pennsylvania, December 2020

132 weather alerts in December 2020, 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 2020. Tap one for its archive.

Alerts: 132
Warnings: 75
Watches: 11
Advisories: 25
Busiest day: December 25, 202049 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, 9:09 PM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	9 hr
Nov 30, 10:53 PM EST	River Flood Warning	PHI	Bucks	5 hr
Nov 30, 11:15 PM EST	Areal Flood Warning	PHI	Philadelphia	4 hr
Dec 1, 1:37 PM EST	Coastal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	2 hr
Dec 9, 3:19 PM EST	Special Weather Statement	CTP	McKean, Potter, Tioga	86 min
Dec 10, 3:53 PM EST	Freezing Fog Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	12 hr
Dec 12, 7:36 AM EST	Special Weather Statement	CTP	Lancaster, Lebanon, York	84 min
Dec 12, 6:19 PM EST	Dense Fog Advisory	PHI	Bucks, Carbon, Lehigh, Monroe, Northampton	7 hr
Dec 13, 1:37 PM EST	Winter Weather Advisory	CTP	Adams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 4 more	25 hr
Dec 13, 7:15 PM EST	Winter Storm Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	44 hr
Dec 14, 3:42 AM EST	Winter Storm Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	48 hr
Dec 14, 4:35 AM EST	Winter Storm Watch	PBZ	Fayette, Westmoreland	23 hr
Dec 14, 4:44 AM EST	Winter Storm Watch	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 25 more	34 hr
Dec 15, 3:18 AM EST	Winter Storm Warning	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	51 hr
Dec 15, 3:46 AM EST	Winter Storm Watch	PBZ	Allegheny, Armstrong, Butler, Fayette, Greene, Jefferson and 2 more	9 hr
Dec 15, 3:46 AM EST	Winter Storm Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 5 more	49 hr
Dec 15, 3:53 AM EST	Winter Storm Warning	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	54 hr
Dec 15, 4:30 AM EST	Winter Storm Warning	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 26 more	51 hr
Dec 15, 1:05 PM EST	Winter Weather Advisory	PBZ	Beaver, Forest, Lawrence, Mercer, Venango	40 hr
Dec 15, 2:23 PM EST	Winter Weather Advisory	CTP	McKean, Warren	38 hr
Dec 16, 3:29 AM EST	Winter Weather Advisory	CLE	Crawford	25 hr
Dec 16, 8:38 AM EST	Mesoscale Discussion	SPC	Bedford, Fulton	6 hr
Dec 16, 1:57 PM EST	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Blair, Carbon, Centre and 19 more	5 hr
Dec 16, 3:43 PM EST	Special Weather Statement	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Lawrence and 4 more	2 hr
Dec 16, 4:41 PM EST	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Perry and 1 more	49 min
Dec 16, 5:41 PM EST	Special Weather Statement	PBZ	Allegheny, Armstrong, Butler, Clarion, Fayette, Indiana and 2 more	2 hr
Dec 16, 5:42 PM EST	Special Weather Statement	CTP	Huntingdon, Juniata, Mifflin, Northumberland, Schuylkill, Snyder and 1 more	33 min
Dec 16, 5:47 PM EST	Special Weather Statement	CTP	Clearfield, Clinton, Lycoming, Sullivan	43 min
Dec 16, 6:48 PM EST	Mesoscale Discussion	SPC	Carbon, Columbia, Lackawanna, Luzerne, Monroe, Northampton and 5 more	5 hr
Dec 16, 7:18 PM EST	Special Weather Statement	CTP	Clearfield, Clinton, Lycoming, Sullivan	42 min
Dec 16, 7:29 PM EST	Special Weather Statement	CTP	Cambria, Clearfield, Somerset	61 min
Dec 16, 9:07 PM EST	Special Weather Statement	CTP	Clearfield, Tioga	53 min
Dec 16, 10:12 PM EST	Mesoscale Discussion	SPC	Bradford, Lackawanna, Lycoming, Sullivan, Susquehanna, Tioga and 2 more	6 hr
Dec 16, 10:17 PM EST	Special Weather Statement	CTP	Clearfield, Clinton, Lycoming	58 min
Dec 20, 8:49 AM EST	Special Weather Statement	CTP	Cameron, Centre, Clearfield, Clinton, Lycoming, Potter and 1 more	56 min
Dec 21, 3:25 AM EST	Winter Weather Advisory	PBZ	Fayette, Westmoreland	30 hr
Dec 21, 3:51 AM EST	Winter Weather Advisory	CTP	Cambria, Somerset	30 hr
Dec 22, 2:38 PM EST	Winter Storm Watch	CLE	Crawford, Erie	24 hr
Dec 22, 2:59 PM EST	Flood Watch	BGM	Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more	69 hr
Dec 22, 3:09 PM EST	Flood Watch	CTP	Adams, Bedford, Blair, Cameron, Centre, Clinton and 21 more	69 hr
Dec 22, 3:22 PM EST	Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	66 hr
Dec 23, 3:48 AM EST	Winter Storm Watch	CTP	Somerset, Warren	30 hr
Dec 23, 4:01 AM EST	Winter Storm Watch	PBZ	Fayette, Westmoreland	24 hr
Dec 23, 12:39 PM EST	Winter Weather Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	48 hr
Dec 23, 1:28 PM EST	River Flood Warning	CTP	Columbia	4 days
Dec 23, 1:28 PM EST	River Flood Warning	CTP	Columbia, Montour, Northumberland, Union	4 days
Dec 23, 2:54 PM EST	Winter Storm Warning	CLE	Crawford, Erie	61 hr
Dec 23, 3:02 PM EST	Winter Weather Advisory	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 1 more	52 hr
Dec 23, 3:23 PM EST	Wind Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	38 hr
Dec 23, 5:53 PM EST	River Flood Warning	CTP	Lycoming, Sullivan	43 hr
Dec 23, 11:51 PM EST	River Flood Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder, Union	21 days
Dec 24, 2:53 AM EST	Winter Storm Warning	CTP	Warren	40 hr
Dec 24, 3:48 AM EST	Winter Storm Warning	PBZ	Beaver, Fayette, Lawrence, Mercer, Westmoreland	33 hr
Dec 24, 3:57 AM EST	Wind Advisory	BGM	Lackawanna, Luzerne, Pike, Wayne	27 hr
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Bradford	42 hr
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Bradford	21 days
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Bradford	59 hr
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Wyoming	21 days
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Luzerne	21 days
Dec 24, 11:30 AM EST	River Flood Warning	BGM	Susquehanna	21 days
Dec 24, 2:13 PM EST	River Flood Advisory	PBZ	Allegheny	40 hr
Dec 24, 4:00 PM EST	River Flood Warning	BGM	Bradford	41 hr
Dec 24, 4:15 PM EST	Areal Flood Advisory	CTP	Cameron, Centre, Clinton, Lycoming, Potter, Sullivan and 1 more	4 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Snyder, Union	28 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Perry	25 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lebanon, Schuylkill	40 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Dauphin, Lebanon	47 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Cumberland	55 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lycoming	49 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lycoming, Northumberland, Union	50 hr
Dec 24, 5:54 PM EST	Flash Flood Warning	BGM	Bradford	8 hr
Dec 24, 5:58 PM EST	River Flood Warning	CTP	Centre, Clinton	18 hr
Dec 24, 5:58 PM EST	River Flood Warning	CTP	Huntingdon	25 hr
Dec 24, 6:29 PM EST	Areal Flood Warning	CTP	Lycoming, Sullivan	10 hr
Dec 24, 6:46 PM EST	Flash Flood Warning	BGM	Bradford	8 hr
Dec 24, 7:05 PM EST	Flash Flood Warning	BGM	Luzerne, Wyoming	8 hr
Dec 24, 7:59 PM EST	Areal Flood Advisory	CTP	Cameron, Centre, Clinton, Potter, Tioga	5 hr
Dec 24, 8:47 PM EST	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	6 hr
Dec 24, 9:08 PM EST	Coastal Flood Advisory	PHI	Bucks, Philadelphia	14 hr
Dec 24, 9:16 PM EST	Areal Flood Advisory	PHI	Bucks, Lehigh, Northampton	3 hr
Dec 24, 9:38 PM EST	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	14 hr
Dec 24, 10:09 PM EST	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	6 hr
Dec 24, 10:13 PM EST	Flash Flood Warning	BGM	Luzerne	6 hr
Dec 24, 10:21 PM EST	Areal Flood Warning	PHI	Bucks	14 hr
Dec 24, 10:25 PM EST	Flash Flood Warning	BGM	Susquehanna	6 hr
Dec 24, 10:30 PM EST	River Flood Warning	PHI	Delaware	10 hr
Dec 24, 11:10 PM EST	Areal Flood Advisory	PHI	Bucks	4 hr
Dec 24, 11:26 PM EST	River Flood Warning	PHI	Chester	13 hr
Dec 24, 11:39 PM EST	Areal Flood Warning	CTP	Tioga	7 hr
Dec 24, 11:48 PM EST	Areal Flood Warning	PHI	Bucks	15 hr
Dec 24, 11:52 PM EST	Flash Flood Warning	BGM	Susquehanna, Wayne	6 hr
Dec 24, 11:54 PM EST	Areal Flood Warning	PHI	Lehigh, Monroe, Northampton	12 hr
Dec 25, 12:08 AM EST	Special Weather Statement	CTP	Lancaster, Lebanon, York	67 min
Dec 25, 12:32 AM EST	River Flood Warning	BGM	Wyoming	15 hr
Dec 25, 12:36 AM EST	River Flood Warning	PHI	Montgomery	13 hr
Dec 25, 12:53 AM EST	Areal Flood Warning	PHI	Chester	6 hr
Dec 25, 12:59 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	21 hr
Dec 25, 1:40 AM EST	Areal Flood Warning	BGM	Bradford	6 hr
Dec 25, 1:43 AM EST	Special Weather Statement	BGM	Luzerne, Susquehanna, Wyoming	32 min
Dec 25, 1:56 AM EST	Areal Flood Warning	PHI	Bucks, Philadelphia	7 hr
Dec 25, 2:05 AM EST	Flash Flood Warning	BGM	Luzerne, Wyoming	4 hr
Dec 25, 2:13 AM EST	Flash Flood Warning	BGM	Bradford, Susquehanna	4 hr
Dec 25, 2:28 AM EST	River Flood Warning	PHI	Bucks	15 hr
Dec 25, 3:29 AM EST	Areal Flood Warning	PHI	Berks	6 hr
Dec 25, 3:33 AM EST	River Flood Warning	PHI	Chester, Delaware	17 hr
Dec 25, 3:58 AM EST	Areal Flood Warning	CTP	Columbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill	3 hr
Dec 25, 4:00 AM EST	River Flood Warning	PHI	Lehigh, Northampton	16 hr
Dec 25, 4:31 AM EST	Areal Flood Warning	PHI	Carbon, Lehigh, Monroe, Northampton	7 hr
Dec 25, 4:32 AM EST	Areal Flood Advisory	CTP	Lycoming, Sullivan	9 hr
Dec 25, 4:53 AM EST	River Flood Warning	PHI	Berks, Montgomery	9 hr
Dec 25, 5:53 AM EST	Areal Flood Warning	BGM	Bradford, Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming	6 hr
Dec 25, 6:32 AM EST	River Flood Warning	PHI	Montgomery, Philadelphia	7 hr
Dec 25, 6:48 AM EST	Areal Flood Advisory	CTP	Tioga	7 hr
Dec 25, 7:28 AM EST	River Flood Warning	PHI	Monroe	10 hr
Dec 25, 10:20 AM EST	River Flood Warning	BGM	Pike	17 hr
Dec 25, 10:21 AM EST	River Flood Warning	BGM	Wayne	22 hr
Dec 25, 12:10 PM EST	River Flood Warning	CTP	Dauphin	62 hr
Dec 25, 12:13 PM EST	Areal Flood Warning	PHI	Carbon, Monroe	9 hr
Dec 25, 12:31 PM EST	River Flood Warning	BGM	Susquehanna	56 hr
Dec 25, 12:31 PM EST	River Flood Warning	CTP	Lancaster, York	45 hr
Dec 25, 12:31 PM EST	River Flood Warning	CTP	Cumberland, Dauphin, Juniata, Lancaster, Perry, Snyder and 1 more	36 hr
Dec 25, 3:50 PM EST	River Flood Warning	CTP	Northumberland, Union	13 hr
Dec 25, 3:50 PM EST	River Flood Warning	CTP	Northumberland, Union	13 hr
Dec 25, 4:06 PM EST	River Flood Warning	BGM	Bradford	68 hr
Dec 25, 8:33 PM EST	Special Weather Statement	CLE	Erie	117 min
Dec 25, 10:11 PM EST	River Flood Warning	BGM	Wyoming	29 hr
Dec 25, 10:30 PM EST	Special Weather Statement	CLE	Erie	60 min
Dec 26, 5:12 AM EST	River Flood Warning	PHI	Northampton	10 hr
Dec 26, 6:56 AM EST	River Flood Warning	PHI	Bucks	9 hr
Dec 28, 7:22 AM EST	Special Weather Statement	BGM	Lackawanna, Pike, Wayne	53 min
Dec 30, 3:20 AM EST	Winter Weather Advisory	BGM	Susquehanna, Wayne	27 hr
Dec 31, 4:48 AM EST	Winter Weather Advisory	CTP	Somerset	103 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
Mesoscale Discussion	4
Special Weather Statement	17
Flooding
Areal Flood Warning	15
Flash Flood Warning	8
River Flood Warning	45
Flood Watch	3
Areal Flood Advisory	8
River Flood Advisory	1
Winter
Winter Storm Warning	7
Winter Storm Watch	8
Winter Weather Advisory	10
Wind and dust
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	1
Freezing Fog Advisory	1
Coast and beach
Coastal Flood Advisory	2

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 2019 2021

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.