2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A powerful cold front and upper level trough pushed across the Upper Ohio Valley on July 10th producing widespread severe weather and flash flooding from eastern Ohio, northern West Virginia, and western Pennsylvania. This included 3 separate tornadoes.
Read the full account →A deepening low pressure system, originating from the southern plains, moved towards the western Great Lakes on Wednesday March 9th. A wintry mix of precipitation changed over to all rain as the warm front associated with this system pushed across the region on Wednesday…
Read the full account →Slow moving thunderstorms produced heavy rain and isolated flash flooding over southern and southeastern portions of Central Pennsylvania during the afternoon and evening of June 1, 2007. Flash flooding transitioned into areal flooding over York County during the overnight hours.
Read the full account →A slow moving cold front moved northeastward toward northern Pennsylvania, and through the region on the 25th. A surge of deep moisture associated with this system produced a period of heavy rain from late on the 24th, through the morning hours on the 25th.
Read the full account →As a cold front moved southeast across the upper Ohio Valley, scattered severe thunderstorms developed across eastern Ohio, western Pennsylvania, and northern West Virginia.
Read the full account →As a cold front moved southeast across the upper Ohio Valley, scattered severe thunderstorms developed across eastern Ohio, western Pennsylvania, and northern West Virginia.
Read the full account →A strong Atlantic coast storm brought heavy rain with amounts between 1 and 3 inches on the 28th. A few locations got more than 3 inches. In addition, snowmelt was causing elevated river flows before the rain started late on the 27th.
Read the full account →Showers and thunderstorms began to develop in a highly unstable and moist atmosphere during the afternoon hours of July 12, 2025. Thunderstorms largely remained sub-severe; however, low effective bulk shear values led to slow-moving thunderstorms to occur across potions of…
Read the full account →Low pressure moving across the Upper Ohio Valley helped initiate showers and storms, some of which produced heavy rain, gusty wind, and isolated large hail across the region on the 5th.
Read the full account →A cold front slowly moving across the Ohio Valley was the focus for the development of scattered thunderstorms, some of which were severe, through the evening hours of the 16th of April.
Read the full account →Heavy rainfall of between 3 and 6 inches in 2 hours produced Flash Flooding in southern Fulton county. Most of the flooding occurred between the towns of Needmore and Big cove. Portions of Route 522, Barnett's Run Road, Hess Road and Gem Bridge road were closed due to flooding.
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 →A weak disturbance in the upper atmosphere slowly moved across the northern tier of Pennsylvania during the afternoon. This feature, along with a stationary frontal boundary at the surface over Northeast Pennsylvania triggered scattered to numerous thunderstorms during the heat…
Read the full account →A slow moving cold front and a moist unstable airmass combined to produce scattered severe thunderstorms and flash flooding across eastern Ohio and Western Pennsylvania.
Read the full account →A slow moving cold front and a moist unstable airmass combined to produce scattered severe thunderstorms and flash flooding across eastern Ohio and Western Pennsylvania.
Read the full account →A convergence boundary set up along the Allegheny Front and allowed for scattered showers and isolated thunderstorms to produce locally heavy rainfall in portions of Huntingdon County during the evening hours of September 22, 2025.
Read the full account →At 236 PM EDT on 17th, numerous roads were flooded in Pulaski and Shenango townships. By 845 PM, Ellwood City had 3.5 inches of rain. As of 6 PM on 18th, many roads were still flooded, and there were a few mud slides, including one on Vanguard Rd in Perry Twp.
Read the full account →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 →Training showers and thunderstorms developed over central Pennsylvania during the evening of August 17, 2023, ahead of an approaching cold front.
Read the full account →A cold front slowly moved northeast through the area on the 11th. It brought 1.5 to 2.5 inches of rain to the southwest quarter of the county. The rain and warmer weather also melted most of the snow that fell earlier in the week.
Read the full account →An upper level disturbance produced showers and thunderstorms with heavy rainfall across western Pennsylvania and the northern West Virginia Panhandle. Flooding of roadways and areas of poor drainage was reported.
Read the full account →A series of thunderstorms moved over portions of northwest Pennsylvania form June 16th through the 18th. A line of training thunderstorms on the evening of the 18th produced radar estimated rainfall amounts of 2 to 3 inches over portions of Crawford County.
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 →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 →