Red Flag Warnings in Pennsylvania
133 red flag warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Red Flag Warnings
- 133
- Busiest year
- 201024 red flag warnings
- Average year
- 8over 17 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Delaware County52
- Philadelphia County52
- Berks County47
- Lehigh County46
- Northampton County44
- Carbon County39
- Monroe County39
- Lackawanna County36
- Luzerne County36
- Pike County36
- Wayne County36
- Wyoming County34
- Susquehanna County32
- Bradford County31
- Lebanon County29
- Dauphin County28
- Lancaster County28
- Columbia County27
- Montour County27
- Northumberland County27
- York County27
- Sullivan County26
- Schuylkill County26
- Bedford County25
- Cumberland County25
- Lycoming County25
- Snyder County25
- Union County25
- Adams County24
- Fulton County24
- Franklin County24
- Perry County24
- Blair County23
- Huntingdon County23
- Juniata County23
- Mifflin County23
- Tioga County23
- Centre County22
- Clinton County22
- Bucks County20
26 more counties
- Montgomery County20
- Chester County18
- Cameron County17
- Potter County17
- Elk County16
- Clearfield County15
- McKean County15
- Warren County15
- Cambria County14
- Somerset County14
- Greene County7
- Allegheny County6
- Washington County6
- Armstrong County5
- Beaver County5
- Butler County5
- Clarion County5
- Forest County5
- Jefferson County5
- Lawrence County5
- Fayette County5
- Mercer County4
- Venango County4
- Westmoreland County4
- Crawford County1
- Erie County1
Nearby
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.