Alert archive / Pennsylvania / 2009
Weather alerts in Pennsylvania, April 2009
40 weather alerts in April 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 April 2009. Tap one for its archive.
- Alerts
- 40
- Warnings
- 9
- Watches
- 4
- Advisories
- 16
- Busiest day
- April 3, 200910 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 2, 5:13 AM EDT | Dense Fog Advisory | PHI | Berks, Delaware, Lehigh, Northampton, Philadelphia | 4 hr |
| Apr 3, 3:04 AM EDT | High Wind Watch | CTP | Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more | 9 hr |
| Apr 3, 9:29 AM EDT | Special Weather Statement | CTP | Bedford, Fulton, Somerset | 61 min |
| Apr 3, 9:31 AM EDT | Special Weather Statement | CTP | Adams, Cumberland, Franklin, Lancaster, York | 74 min |
| Apr 3, 10:42 AM EDT | Special Weather Statement | CTP | Blair, Huntingdon | 48 min |
| Apr 3, 11:12 AM EDT | Special Weather Statement | CTP | Lancaster | 48 min |
| Apr 3, 11:45 AM EDT | Wind Advisory | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 6 more | 16 hr |
| Apr 3, 11:47 AM EDT | Wind Advisory | CTP | Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more | 28 hr |
| Apr 3, 2:58 PM EDT | Wind Advisory | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 30 hr |
| Apr 3, 3:02 PM EDT | Wind Advisory | CLE | Crawford, Erie | 13 hr |
| Apr 3, 3:08 PM EDT | Wind Advisory | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 29 hr |
| Apr 5, 4:46 AM EDT | Winter Storm Watch | CLE | Crawford, Erie | 34 hr |
| Apr 5, 3:06 PM EDT | Flood Watch | PHI | Delaware, Philadelphia | 22 hr |
| Apr 6, 2:55 PM EDT | Lake Effect Snow Advisory | PBZ | Forest, Mercer, Venango | 41 hr |
| Apr 6, 2:55 PM EDT | Winter Weather Advisory | PBZ | 38 hr | |
| Apr 6, 2:56 PM EDT | Lake Effect Snow Advisory | CTP | McKean, Warren | 39 hr |
| Apr 6, 2:56 PM EDT | Winter Weather Advisory | CTP | Elk, Potter, Somerset | 37 hr |
| Apr 6, 3:15 PM EDT | Lake Effect Snow Warning | CLE | Crawford, Erie | 37 hr |
| Apr 6, 3:15 PM EDT | Lake Effect Snow Advisory | CLE | Erie | 37 hr |
| Apr 16, 3:01 PM EDT | Frost Advisory | PHI | Delaware | 17 hr |
| Apr 16, 3:06 PM EDT | Frost Advisory | CTP | Adams, Franklin, Lancaster, York | 18 hr |
| Apr 19, 2:36 PM EDT | Flood Watch | PHI | Delaware, Northampton, Philadelphia | 22 hr |
| Apr 20, 8:19 AM EDT | Wind Advisory | CLE | Erie | 11 hr |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | Franklin | 2 hr |
| Apr 21, 5:54 PM EDT | Special Weather Statement | CTP | Columbia, Lebanon, Montour, Northumberland, Schuylkill, Sullivan and 1 more | 51 min |
| Apr 21, 6:20 PM EDT | Special Weather Statement | CTP | Lancaster | 55 min |
| Apr 21, 7:06 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 39 min |
| Apr 23, 2:57 AM EDT | Frost Advisory | CTP | Adams, Franklin, Lancaster, York | 29 hr |
| Apr 23, 4:00 AM EDT | Frost Advisory | PHI | Delaware | 28 hr |
| Apr 24, 7:35 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 25 min |
| Apr 24, 7:45 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 30 min |
| Apr 24, 8:43 AM EDT | Special Weather Statement | CTP | Somerset | 47 min |
| Apr 24, 9:24 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 36 min |
| Apr 24, 9:32 AM EDT | Special Weather Statement | CTP | Cambria | 58 min |
| Apr 24, 9:38 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Jefferson | 37 min |
| Apr 24, 6:51 PM EDT | Mesoscale Discussion | SPC | Cameron, Elk, Forest, Jefferson, McKean, Potter and 1 more | 54 min |
| Apr 25, 1:24 PM EDT | Mesoscale Discussion | SPC | McKean, Potter, Warren | 66 min |
| Apr 28, 10:25 AM EDT | Red Flag Warning | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 10 hr |
| Apr 28, 10:34 AM EDT | Red Flag Warning | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 9 hr |
| Apr 28, 10:43 AM EDT | Red Flag Warning | CTP | Adams, Bedford, Blair, Centre, Clinton, Columbia and 19 more | 9 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 | 5 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 8 |
| Flooding | |
| Flood Watch | 2 |
| Winter | |
| Lake Effect Snow Warning | 1 |
| Winter Storm Watch | 1 |
| Lake Effect Snow Advisory | 3 |
| Winter Weather Advisory | 2 |
| Cold | |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lancaster County9
- Delaware County7
- Franklin County7
- Adams County6
- York County6
- Philadelphia County5
- McKean County5
- Potter County5
- Somerset County5
- Warren County5
- Erie County5
- Northampton County4
- Bedford County4
- Blair County4
- Columbia County4
- Cumberland County4
- Elk County4
- Fulton County4
- Huntingdon County4
- Lebanon County4
- Montour County4
- Northumberland County4
- Schuylkill County4
- Sullivan County4
- Tioga County4
- Berks County3
- Lehigh County3
- Cambria County3
- Cameron County3
- Centre County3
- Clinton County3
- Dauphin County3
- Juniata County3
- Lycoming County3
- Mifflin County3
- Perry County3
- Snyder County3
- Union County3
- Forest County3
- Jefferson County3
24 more counties
- Crawford County3
- Clearfield County2
- Allegheny County2
- Armstrong County2
- Greene County2
- Mercer County2
- Venango County2
- Washington County2
- Bradford County2
- Lackawanna County2
- Luzerne County2
- Pike County2
- Susquehanna County2
- Wayne County2
- Wyoming County2
- Carbon County2
- Monroe County2
- Westmoreland County2
- Indiana County2
- Beaver County1
- Butler County1
- Clarion County1
- Lawrence County1
- Fayette County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.