Flash Flood Watches in Pennsylvania
474 flash flood watches 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 flash flood watches reaches back to 2005.
Flash Flood Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Flash Flood Watches
- 474
- Busiest year
- 201950 flash flood watches
- Average year
- 30over 16 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.
- Philadelphia County104
- Delaware County103
- Northampton County91
- Berks County90
- Lehigh County90
- York County85
- Lancaster County84
- Lebanon County78
- Adams County77
- Dauphin County76
- Wayne County76
- Carbon County75
- Monroe County75
- Cumberland County73
- Franklin County73
- Montgomery County73
- Lackawanna County72
- Somerset County72
- Luzerne County71
- Bucks County71
- Bedford County70
- Perry County68
- Chester County68
- Pike County67
- Schuylkill County65
- Wyoming County64
- Bradford County62
- Cambria County62
- Greene County62
- Susquehanna County62
- Allegheny County60
- Blair County59
- Fulton County59
- Washington County57
- Lycoming County56
- Fayette County56
- Beaver County54
- Westmoreland County53
- Northumberland County52
- Columbia County51
26 more counties
- Huntingdon County51
- Montour County51
- Union County51
- Juniata County50
- Snyder County49
- Sullivan County49
- Clearfield County47
- Tioga County46
- Butler County44
- Centre County44
- Clinton County44
- Mifflin County44
- Armstrong County43
- Elk County43
- McKean County42
- Clarion County41
- Jefferson County41
- Potter County40
- Lawrence County39
- Warren County39
- Cameron County37
- Venango County37
- Forest County35
- Mercer County35
- Crawford County29
- Erie County27
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.