2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A low pressure system and its associated warm front were slowly progressing through the Ohio valley bringing numerous rounds of showers and thunderstorms.
Read the full account →A cold front was located northwest of the region during the afternoon and evening hours of the 10th. A warm and unstable airmass caused showers and thunderstorms to develop shortly after noontime and persist through the afternoon and evening hours.
Read the full account →Heavy thunderstorm rain caused flooding of streets, streams and low lying areas. Dozens of roads were closed. Two underpasses flooded in Saegertown, with water over the roof of a car stuck in one of them.
Read the full account →In response to very heavy rains across parts of the Allegheny River Basin, the Allegheny River went above flood stage between Lock 9 and Lock 3. The river crested 3.5 feet above the 19 foot flood stage at Lock 9.
Read the full account →A strengthening line of showers and storms pushed into central Pennsylvania from the west during the afternoon of August 11, 2021. At the same time, discreet cells developed over the Lower Susquehanna Valley, well ahead of the main line.
Read the full account →The Ohio River, at the Point in Pittsburgh to Dashields Lock and Dam, went above their 25 foot flood stages in response to heavy thunderstorm rains in the Allegheny and Monongahela River Basins. Only minor flooding occurred.
Read the full account →A strong low pressure system tracked northeast from Kentucky to western New York state during the daylight hours on Thursday the 16th. A large fetch of Gulf and Atlantic moisture was pulled northward ahead of the cold front, which produced a squall line of thunderstorms.
Read the full account →Showers and thunderstorms formed ahead of a crossing cold front on July 17th. An upper speed max rotating through an upper trough to the west provided support for lift through right entrance region jet dynamics.
Read the full account →Slow moving thunderstorms along a nearly stationary cold front produced locally heavy rainfall in a short duration, resulting in flash flooding across portions of the Lower Susquehanna Valley.
Read the full account →A slow moving upper level low over the central U.S provided for southerly flow and moisture transport to eastern Ohio, western Pennsylvania, and northern West Virginia.
Read the full account →Strong south to southeast winds resulted in widespread tidal flooding for much of the coast line and tidal waterways. The strong southeast to south winds resulted in a push of water up the Delaware Bay/River and through the back bays of the Atlantic coast.
Read the full account →Strong south to southeast winds resulted in widespread tidal flooding for much of the coast line and tidal waterways. The strong southeast to south winds resulted in a push of water up the Delaware Bay/River and through the back bays of the Atlantic coast.
Read the full account →Strong south to southeast winds resulted in widespread tidal flooding for much of the coast line and tidal waterways. The strong southeast to south winds resulted in a push of water up the Delaware Bay/River and through the back bays of the Atlantic coast.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event.
Read the full account →A strong low pressure system moved across the Upper Ohio Valley bringing heavy rain as well as a line of severe thunderstorms. Flooding of streams and creeks was widespread across eastern Ohio and western Pennsylvania.
Read the full account →A strong low pressure system moved across the Upper Ohio Valley bringing heavy rain as well as a line of severe thunderstorms. Flooding of streams and creeks was widespread across eastern Ohio and western Pennsylvania.
Read the full account →A strong low pressure system moved across the Upper Ohio Valley bringing heavy rain as well as a line of severe thunderstorms. Flooding of streams and creeks was widespread across eastern Ohio and western Pennsylvania.
Read the full account →A strong low pressure system moved across the Upper Ohio Valley bringing heavy rain as well as a line of severe thunderstorms. Flooding of streams and creeks was widespread across eastern Ohio and western Pennsylvania.
Read the full account →A strong low pressure system moved across the Upper Ohio Valley bringing heavy rain as well as a line of severe thunderstorms. Flooding of streams and creeks was widespread across eastern Ohio and western Pennsylvania.
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