2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A stationary frontal system over northeastern Pennsylvania combined with a weak upper level disturbance to focus heavy rain producing thunderstorms over the area.
Read the full account →A strengthening coastal low pressure system brought several rounds of rain to the region Sunday night into Monday (December 17-18th). Total rainfall amounts across the forecast area varied from about 1.50 inches up to 7.00 inches.
Read the full account →A warm, moist airmass remained in place through the latter half of the month which allowed for daily shower and thunderstorm chances. Training storms was the primary factor to the resultant flash flooding as cells developed upshear of the initial updrafts in West Virginia, Ohio,…
Read the full account →A strong mid-level trough and an associated frontal zone crossed through the|Mid-South and took aim on the OH Valley. Strong forcing associated the energy aloft coupled with a gradually destabilizing boundary layer out ahead it set the stage for areas of locally heavy showers…
Read the full account →A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →Ample moisture and a near-stationary boundary assisted in the development of slow moving thunderstorms late on June 14th. Precipitable water values exceeding 90% of climatology, which supported efficient rainfall.
Read the full account →A potent cold front pushed into an unseasonably warm and humid air mass, generating widespread showers and thunderstorms. There was a considerable amount of both low level and deep layer shear, and some of the storms produced damaging winds.
Read the full account →Heavy rain with little, if any, lightning moved along a stationary front in a tropical environment. Moisture was plentiful, with precipitable water values of over 2 inches.
Read the full account →A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A deep plume of tropical moisture had spread over Northeast Pennsylvania ahead of the remnants of Tropical Storm Debby. Prolonged torrential rains blanketed the region during the night and early morning hours before becoming enhanced by the approaching tropical remnants.
Read the full account →A deep stream of moisture was pulled northwestward from the Atlantic Ocean into the mountains of south-central Pennsylvania around an upper level low centered over the Ohio Valley during the afternoon and evening hours of May 13. 2025.
Read the full account →Several rounds of thunderstorms trained over portions of Lawrence, Allegheny, Westmoreland Clarion and Beaver counties on June 6th. This was a result of a very moist airmass and a stationary boundary located over northern Ohio and northwestern Pennsylvania.
Read the full account →Several rounds of thunderstorms trained over portions of Lawrence, Allegheny, Westmoreland Clarion and Beaver counties on June 6th. This was a result of a very moist airmass and a stationary boundary located over northern Ohio and northwestern Pennsylvania.
Read the full account →A weak area of low pressure moved into Northeastern Pennsylvania during the afternoon which provided a focus for heavy rain-producing thunderstorms.
Read the full account →The risk for severe storms continued May 29th as necessary ingredients stayed in place. An unstable/ buoyant atmosphere, wind shear to sustain updrafts, and large scale |ascension with a crossing shortwave were all present.
Read the full account →On January 11 the region was impacted by anomalously high temperatures around 60 degrees. This was accompanied by gusty winds around 25 mph. The area snowpack was completely eliminated in a combination of melting and evaporation.
Read the full account →Low pressure was slowly moving northeast from IN through northern OH during the day of July 11th, 2021, lifting a warm front northward towards northwest PA. Showers and thunderstorms moved northeast across Erie County, PA for much of the daytime hours ahead of this front.
Read the full account →A weak trough and remnant outflows initiated afternoon thunderstorms. Initial single cell development across eastern Ohio ultimately congealed along propagating cold pools and surged southeast.
Read the full account →A potent cold front pushed into an unseasonably warm and humid air mass, generating widespread showers and thunderstorms. There was a considerable amount of both low level and deep layer shear, and some of the storms produced damaging winds.
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…
Read the full account →A warm, unstable airmass has been in place over the region for much of the week leading up to July 17th, 2021, with several rounds of rainfall during the week leading to saturated soils across northwest PA.
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