2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
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 →For the second time within a week heavy rain fell across Eastern Pennsylvania. An additional 1.5 to 5 inches of precipitation fell and caused more widespread river, stream and poor drainage flooding including the Delaware, Lehigh and Schuylkill Rivers.
Read the full account →The first of what eventually became numerous large ice jams were reported by ice observers on the Allegheny River and its tributaries by December 26th. This abnormally early ice development continued to build as frigid temperatures persisted.
Read the full account →A shield of moderate to heavy rainfall, associated with the remnants of tropical cyclone Ida, moved from the DelMarVa peninsula to New England.
Read the full account →Remnant moisture from Tropical Storm Henri produced copious amounts of rain during the early morning of the 15th across Chester County. The heaviest rain fell from Downingtown south through Kenneth Square.
Read the full account →Several bands of strong to severe thunderstorms developed along two north-south axes of low level confluence across central Pennsylvania into upstate New York.
Read the full account →On March 2nd and 3rd milder temperatures and rainfall over the southwest portion of the area resulted in several ice jams and snow melt flooding.||The first signs of flooding began on Tuesday Evening, March 3rd when minor localized flooding was reported.
Read the full account →Torrential rains from slow-moving thunderstorms occurred at multiple times during the day, with events early in the morning, during the mid afternoon and early evening hours in Plymouth Borough.
Read the full account →Showers and thunderstorms, some of which where severe, developed in a rather unstable environment with modest shear, in the afternoon and evening of the 28th.
Read the full account →A shortwave trough and its associated surface cold front advanced across the upper Midwest and Great Lakes on July 10th. Conditions were favorable for strong/ severe downburst winds.
Read the full account →A shortwave trough and its associated surface cold front advanced across the upper Midwest and Great Lakes on July 10th. Conditions were favorable for strong/ severe downburst winds.
Read the full account →At 245 PM EDT on 17th, flooding began in Sarver. At 315 PM, Butler reported 3" of rain. At 445 PM, flooding occurred in Butler. State of emergency declared 5 PM EDT 17th. By 6 PM, 4.3" of rain in Penn Twp. Harmony and Jackson townships hardest hit.
Read the full account →Heavy thunderstorm rains continued to create flash flooding conditions throughout the county. Some roads, including Allegheny River Boulevard in downtown Pittsburgh, experienced extensive flooding.The most significant flash flood event occurred at an automobile dealership in…
Read the full account →A slow moving storm from the Ohio Valley brought 1 to 3 inches of rain on April 2nd and 3rd. Before this storm, the rivers and streams had high flows due to a previous rainstorm March 28th and snowmelt. All towns were affected in the county by flash flooding.
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 →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 →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 →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 →Storms producing heavy rainfall developed and crossed over an area that was already saturated from earlier rain on the evening of the 30th. The result was flooding over portions of Follansbee, West Virginia and in several locations around Washington and Allegheny counties in…
Read the full account →A lingering mesoscale convective vortex over northwest Ohio that is acting as a trigger for developing thunderstorms on its eastern flank. 850-300mb mean steering flow, suggested at storm motion had the potential to slow down and create flash flooding in regions downstream (i.e.
Read the full account →A cold front supported scattered heavy rain-producing thunderstorms across Northeastern Pennsylvania. Multiple storms moved very slowly over the same townships of Lackawanna, Wayne and Pike counties.
Read the full account →Unseasonably cool air associated with a strong upper level low over the Great Lakes region combined with warm Lake Erie waters to produce persistent, intense lake-enhanced rainfall which trained repeatedly over northern Erie County, Pennsylvania during the early morning hours of…
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 weak cold front moved southeast across eastern Ohio and western Pennsylvania the afternoon and evening of the 28th. While some wind damage was reported, more significant flash flooding occurred over portions of Allegheny and Fayette counties in Pennsylvania, with the…
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