2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
Several days of heavy rain throughout Southeastern Pennsylvania culminated with major flooding along the Brandywine Basin and moderate flooding along Schuylkill River from the 27th through the 29th. President George W. Bush declared Chester County a disaster area.
Read the full account →A passing shortwave trough and surface cold front brought scattered showers and thunderstorm on July 11th. Increasing shear, building instability, and mid-level dry resulted in a few strong storms across the area.
Read the full account →Low pressure moved north along the Atlantic Seaboard spreading steady and heavy rain into northeastern Pennsylvania during the overnight hours. Rainfall amounts of 2 to 4 inches were observed along with a considerable amount of melting snow into area rivers and streams.
Read the full account →Low pressure moved north along the Atlantic Seaboard spreading steady and heavy rain into northeastern Pennsylvania during the overnight hours. Rainfall amounts of 2 to 4 inches were observed along with a considerable amount of melting snow into area rivers and streams.
Read the full account →An excessively warm and humid airmass resided over northeastern Pennsylvania for several days. A weak surface boundary provided the focus for slow moving, conglomerated thunderstorms which produced several hours of locally heavy downpours.
Read the full account →A low pressure system located over southern Ontario along with surface boundaries in the vicinity of northeast Pennsylvania resulted in severe thunderstorms during the late afternoon and evening hours.
Read the full account →A stationary front poised in the vicinity of central New York and northeast Pennsylvania was the focus for very warm and moist atmospheric conditions across the region.
Read the full account →Deep moisture combined with an approaching cold front and a favorable position of the jet stream triggered numerous heavy rain producing thunderstorms over northeastern Pennsylvania.
Read the full account →Deep moisture combined with an approaching cold front and a favorable position of the jet stream triggered numerous heavy rain producing thunderstorms over northeastern Pennsylvania.
Read the full account →Rain from the remnants of Hurricane Ivan started during the night of the 16th, and continued into the evening of the 17th. At 115 PM EDT on 17th, roads flooded in Canonsburg and Washington. At 206 PM, there was widespread stream flooding in Burgettstown, McDonald, and Midway.
Read the full account →Remnants of mesoscale convective systems over the Great Lakes advanced into the Ohio River Valley throughout the day on August 12th and helped to create severe storms.
Read the full account →Up to seven inches of heavy thunderstorm rain caused flooding of streets, streams, basements and low lying areas. In the city of Erie, homes were destroyed and some homes and apartments had to be evacuated.
Read the full account →Thunderstorms with torrential downpours that remained nearly stationary during the early evening of the 30th, caused flash flooding in the Mill Creek Basin in Bucks County just above its confluence with the Neshaminy Creek.
Read the full account →The remnants of Hurricane Ivan interacting with a slowly moving cold front caused widespread very heavy rain to fall during the first half of the day on the 18th in Lehigh County.
Read the full account →A slow moving frontal system brought moderate to heavy rains across much of central and north-central Pennsylvania during the overnight hours between October 20th and 21st.
Read the full account →A cold front dropped down across the region on the morning of July 21st. Convective initiation was aided by increased low-level moisture convergence along the front, as well as destabilization of the atmosphere due to daytime heating.
Read the full account →A cold front dropped down across the region on the morning of July 21st. Convective initiation was aided by increased low-level moisture convergence along the front, as well as destabilization of the atmosphere due to daytime heating.
Read the full account →A cold front dropped down across the region on the morning of July 21st. Convective initiation was aided by increased low-level moisture convergence along the front, as well as destabilization of the atmosphere due to daytime heating.
Read the full account →A cold front dropped down across the region on the morning of July 21st. Convective initiation was aided by increased low-level moisture convergence along the front, as well as destabilization of the atmosphere due to daytime heating.
Read the full account →Mid-level westerly flow of 45-70kts streamed over the Great Lakes/Upper Ohio Valley. A shortwave trough embedded within this zonal flow entered the region and moved eastward throughout the day, helping to provide forcing for ascent and strengthening of deep layer shear.
Read the full account →Mid-level westerly flow of 45-70kts streamed over the Great Lakes/Upper Ohio Valley. A shortwave trough embedded within this zonal flow entered the region and moved eastward throughout the day, helping to provide forcing for ascent and strengthening of deep layer shear.
Read the full account →Major flooding occurred along the Delaware River from Matamoras, PA and Port Jervis, NY south through the eastern border of Pike County Wednesday June 28th.
Read the full account →A series of low pressure systems that moved north along a slowly moving cold front brought heavy rain into Eastern Pennsylvania on September 30th and October 1st. Event precipitation totals average 5 to 10 inches with the highest amounts in the Philadelphia western suburbs.
Read the full account →A slow moving frontal system brought moderate to heavy rains across much of central and north-central Pennsylvania during the overnight hours between October 20th and 21st.
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