2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A slow-moving warm front in an extremely moist (PWAT values exceeding 2.00, values closer to 2.25 across the Lower Susquehanna Valley) and unstable environment allowed for multiple clusters of thunderstorms to begin to form during the late morning hours and continue through the…
Read the full account →A fairly moist and unstable environment ahead of a shortwave trough allowed for showers and thunderstorms to begin forming across central Pennsylvania during the morning hours of July 14, 2025.
Read the full account →A fairly moist and unstable environment ahead of a shortwave trough allowed for showers and thunderstorms to begin forming across central Pennsylvania during the morning hours of July 14, 2025.
Read the full account →A fairly moist and unstable environment ahead of a shortwave trough allowed for showers and thunderstorms to begin forming across central Pennsylvania during the morning hours of July 14, 2025.
Read the full account →A fairly moist and unstable environment ahead of a shortwave trough allowed for showers and thunderstorms to begin forming across central Pennsylvania during the morning hours of July 14, 2025.
Read the full account →A fairly moist and unstable environment ahead of a shortwave trough allowed for showers and thunderstorms to begin forming across central Pennsylvania during the morning hours of July 14, 2025.
Read the full account →Convection across southern Pennsylvania began to develop in an unstable and moist environment ahead of a shortwave trough traversing the area during the afternoon and evening hours of July 9, 2025.
Read the full account →Mid-level shortwave approaching the region, coupled with a low-level warm front, allowed for ample lift across central Pennsylvania during the late afternoon and evening hours of July 16, 2025.
Read the full account →Mid-level shortwave approaching the region, coupled with a low-level warm front, allowed for ample lift across central Pennsylvania during the late afternoon and evening hours of July 16, 2025.
Read the full account →A surface cold front was stationed near the Mason-Dixon line, with an area of surface low pressure developing and tracking across southern portions of central Pennsylvania.
Read the full account →A surface cold front was stationed near the Mason-Dixon line, with an area of surface low pressure developing and tracking across southern portions of central Pennsylvania.
Read the full account →The combination of snowmelt from the previous week's two storms, unseasonably warm temperatures and an additional one to two inches of rain caused the flash flooding of almost every small stream and significant roadway flooding the afternoon and early evening hours on the 19th.
Read the full account →For the second time in a week, extensive urban and lowland flooding was reported across Erie and Crawford Counties. The remnants of Ivan moved across the Ohio Valley on September 17th.
Read the full account →A cold front associated with a surface low pressure system centered over Lake Superior approached the region late Tuesday, November 30th. Abundant moisture and temperatures above freezing ahead of the cold front allowed for most of the precipitation to fall as heavy rain.
Read the full account →A cold front across northwestern Pennsylvania allowed for severe thunderstorms to form during the early morning hours across northwestern Pennsylvania, briefly producing quarter-sized hail before moving northeastward into New York.
Read the full account →A cold front across northwestern Pennsylvania allowed for severe thunderstorms to form during the early morning hours across northwestern Pennsylvania, briefly producing quarter-sized hail before moving northeastward into New York.
Read the full account →Low pressure stationed across the Delmarva during the early morning hours of May 6, 2025 began to lift north and east during the afternoon hours, allowing portions of eastern Pennsylvania to have a brief period of residence time in the warm sector.
Read the full account →Low pressure stationed across the Delmarva during the early morning hours of May 6, 2025 began to lift north and east during the afternoon hours, allowing portions of eastern Pennsylvania to have a brief period of residence time in the warm sector.
Read the full account →A slow-moving warm front in an extremely moist (PWAT values exceeding 2.00, values closer to 2.25 across the Lower Susquehanna Valley) and unstable environment allowed for multiple clusters of thunderstorms to begin to form during the late morning hours and continue through the…
Read the full account →A slow-moving surface warm front stationed across western Pennsylvania allowed for slow-moving showers and thunderstorms to form across southwestern Pennsylvania in an environment of anomalously moist air with long, skinny CAPE and enhanced low-level shear.
Read the full account →A surface cold front stationed across northern Pennsylvania allowed for scattered showers and thunderstorms to form in an environment with ample instability and limited shear during the afternoon and evening hours of June 25, 2025.
Read the full account →A stationary front set up across the Laurel Highlands during the morning and afternoon hours of June 6, 2025 providing ample lift in an environment with plentiful moisture and sufficient instability to produce a severe thunderstorm in Cambria County, with multiple trees down in…
Read the full account →A low pressure system stationed along the Hudson Bay allowed for central Pennsylvania to experience a brief period in the warm sector during the afternoon hours of June 9, 2025 ahead of a mid-level trough.
Read the full account →A low pressure system stationed along the Hudson Bay allowed for central Pennsylvania to experience a brief period in the warm sector during the afternoon hours of June 9, 2025 ahead of a mid-level trough.
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