Alert archive / Pennsylvania / 2020
Weather alerts in Pennsylvania, September 2020
67 weather alerts in September 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 September 2020. Tap one for its archive.
- Alerts
- 67
- Warnings
- 4
- Watches
- 5
- Advisories
- 33
- Busiest day
- September 3, 202017 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 |
|---|---|---|---|---|
| Sep 2, 3:37 PM EDT | Mesoscale Discussion | SPC | Adams, Chester, Cumberland, Dauphin, Franklin, Lancaster and 2 more | 53 min |
| Sep 2, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Chester, Cumberland, Dauphin, Delaware and 5 more | 5 hr |
| Sep 2, 7:18 PM EDT | Special Weather Statement | CTP | York | 27 min |
| Sep 2, 7:58 PM EDT | Special Weather Statement | CTP | Lancaster | 32 min |
| Sep 2, 8:07 PM EDT | Special Weather Statement | CTP | Sullivan | 38 min |
| Sep 2, 8:07 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Sep 2, 8:20 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Montgomery and 1 more | 115 min |
| Sep 2, 8:44 PM EDT | Special Weather Statement | CTP | Sullivan | 31 min |
| Sep 2, 9:13 PM EDT | Special Weather Statement | BGM | Luzerne | 47 min |
| Sep 3, 4:23 AM EDT | Beach Hazards Statement | CLE | Erie | 61 hr |
| Sep 3, 12:20 PM EDT | Special Weather Statement | PBZ | Fayette | 25 min |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | Adams, Chester, Cumberland, Delaware, Franklin, Fulton and 3 more | 114 min |
| Sep 3, 3:42 PM EDT | Tornado Watch | SPC | Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 8 more | 6 hr |
| Sep 3, 4:47 PM EDT | Special Weather Statement | CTP | Adams | 28 min |
| Sep 3, 5:11 PM EDT | Special Weather Statement | CTP | York | 34 min |
| Sep 3, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 30 min |
| Sep 3, 5:40 PM EDT | Special Weather Statement | CTP | Berks | 35 min |
| Sep 3, 6:13 PM EDT | Special Weather Statement | CTP | Lancaster | 47 min |
| Sep 3, 7:14 PM EDT | Special Weather Statement | PHI | Bucks | 46 min |
| Sep 3, 7:16 PM EDT | Special Weather Statement | PHI | Montgomery | 44 min |
| Sep 3, 7:17 PM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 43 min |
| Sep 6, 3:30 PM EDT | Beach Hazards Statement | CLE | Erie | 29 hr |
| Sep 7, 11:20 AM EDT | Special Weather Statement | PBZ | Mercer | 25 min |
| Sep 7, 11:46 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer, Venango | 29 min |
| Sep 7, 11:53 AM EDT | Areal Flood Advisory | PBZ | Lawrence, Mercer | 3 hr |
| Sep 7, 1:44 PM EDT | Areal Flood Advisory | PBZ | Lawrence | 3 hr |
| Sep 7, 3:22 PM EDT | Areal Flood Advisory | PBZ | Butler | 113 min |
| Sep 8, 3:48 PM EDT | Beach Hazards Statement | CLE | Erie | 6 hr |
| Sep 9, 5:08 PM EDT | Flash Flood Watch | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 29 hr |
| Sep 10, 3:15 AM EDT | Dense Fog Advisory | CLE | Erie | 7 hr |
| Sep 10, 1:38 PM EDT | Flash Flood Watch | CTP | Adams, Dauphin, Lancaster, Lebanon, York | 6 hr |
| Sep 10, 1:56 PM EDT | Areal Flood Advisory | CTP | Lancaster, York | 2 hr |
| Sep 10, 3:07 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery | 3 hr |
| Sep 10, 4:02 PM EDT | Areal Flood Advisory | CTP | Lancaster, York | 118 min |
| Sep 10, 4:20 PM EDT | Areal Flood Advisory | CTP | Adams | 2 hr |
| Sep 10, 5:04 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 3 hr |
| Sep 10, 9:27 PM EDT | Beach Hazards Statement | CLE | Erie | 29 hr |
| Sep 13, 10:16 AM EDT | Beach Hazards Statement | CLE | Erie | 27 hr |
| Sep 14, 3:28 AM EDT | Frost Advisory | CTP | McKean | 29 hr |
| Sep 16, 3:59 PM EDT | Beach Hazards Statement | CLE | Erie | 60 hr |
| Sep 18, 3:12 AM EDT | Frost Advisory | BGM | Bradford, Lackawanna, Pike, Susquehanna, Wayne, Wyoming | 29 hr |
| Sep 18, 3:31 AM EDT | Frost Advisory | CTP | Cameron, Clearfield, Sullivan, Tioga, Warren | 28 hr |
| Sep 18, 3:31 AM EDT | Freeze Watch | CTP | Elk, McKean, Potter | 10 hr |
| Sep 18, 9:12 AM EDT | Frost Advisory | PBZ | Clarion, Forest, Jefferson, Mercer, Venango | 24 hr |
| Sep 18, 1:03 PM EDT | Freeze Warning | CTP | Elk, McKean, Potter | 19 hr |
| Sep 18, 2:53 PM EDT | Frost Advisory | CLE | Crawford, Erie | 18 hr |
| Sep 19, 12:53 PM EDT | Frost Advisory | CTP | Adams, Bedford, Blair, Cambria, Centre, Clearfield and 20 more | 20 hr |
| Sep 19, 1:17 PM EDT | Frost Advisory | PBZ | Armstrong, Butler, Clarion, Fayette, Forest, Jefferson and 4 more | 20 hr |
| Sep 19, 2:46 PM EDT | Frost Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 17 hr |
| Sep 19, 3:04 PM EDT | Frost Advisory | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 18 hr |
| Sep 19, 3:04 PM EDT | Frost Advisory | CLE | Crawford, Erie | 18 hr |
| Sep 20, 11:59 AM EDT | Frost Advisory | CTP | Adams, Bedford, Blair, Cambria, Centre, Clearfield and 18 more | 21 hr |
| Sep 20, 12:12 PM EDT | Frost Advisory | PBZ | Armstrong, Butler, Clarion, Forest, Jefferson, Venango | 21 hr |
| Sep 20, 2:41 PM EDT | Frost Advisory | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 18 hr |
| Sep 20, 3:16 PM EDT | Frost Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 15 hr |
| Sep 21, 1:35 PM EDT | Frost Advisory | CTP | Adams, Bedford, Blair, Cambria, Clinton, Columbia and 16 more | 19 hr |
| Sep 21, 2:26 PM EDT | Frost Advisory | BGM | Lackawanna, Luzerne, Pike, Wayne | 19 hr |
| Sep 21, 3:35 PM EDT | Frost Advisory | PBZ | Clarion, Fayette, Forest, Jefferson, Westmoreland | 17 hr |
| Sep 25, 8:01 AM EDT | Dense Fog Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 119 min |
| Sep 28, 9:32 AM EDT | Beach Hazards Statement | CLE | Erie | 25 hr |
| Sep 29, 3:26 PM EDT | Areal Flood Advisory | PHI | Delaware | 3 hr |
| Sep 29, 6:20 PM EDT | Areal Flood Advisory | PHI | Bucks, Philadelphia | 3 hr |
| Sep 29, 9:24 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more | 4 hr |
| Sep 29, 10:17 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Northampton | 3 hr |
| Sep 30, 1:46 AM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Philadelphia | 3 hr |
| Sep 30, 2:37 AM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 4 hr |
| Sep 30, 5:10 AM EDT | Beach Hazards Statement | CLE | Erie | 41 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 | 3 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 14 |
| Flooding | |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 14 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 17 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Beach Hazards Statement | 8 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- York County13
- Lancaster County11
- Erie County11
- Adams County10
- Montgomery County10
- Bucks County10
- Chester County9
- Berks County9
- Delaware County9
- Philadelphia County9
- Lehigh County8
- Cumberland County7
- Dauphin County7
- Franklin County6
- Northampton County6
- Lebanon County5
- Sullivan County5
- Mercer County5
- Carbon County5
- Luzerne County4
- Fulton County4
- Lawrence County4
- Venango County4
- Lackawanna County4
- Pike County4
- Wayne County4
- Clarion County4
- Forest County4
- Jefferson County4
- Monroe County4
- Fayette County3
- Butler County3
- McKean County3
- Bradford County3
- Susquehanna County3
- Wyoming County3
- Clearfield County3
- Bedford County3
- Blair County3
- Cambria County3
22 more counties
- Clinton County3
- Columbia County3
- Huntingdon County3
- Juniata County3
- Lycoming County3
- Mifflin County3
- Montour County3
- Northumberland County3
- Perry County3
- Snyder County3
- Somerset County3
- Union County3
- Elk County2
- Potter County2
- Crawford County2
- Centre County2
- Schuylkill County2
- Armstrong County2
- Westmoreland County2
- Cameron County1
- Tioga County1
- Warren County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.