2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A strong coastal storm developed over the eastern Gulf of Mexico, crossed the Florida peninsula, and pushed northward up the East Coast from December 17 through December 19, 2023.
Read the full account →Tropical moisture continued to stream northward into northeast Pennsylvania ahead of a frontal system which slowly moved westward into the eastern Great Lakes by Tuesday morning the 27th.
Read the full account →The remnants of tropical storm Allison drenched the southern halves of Montgomery and Bucks Counties and Philadelphia with up to 10 inches of rain. Torrential downpours occurred from early afternoon through the late evening on the 16th.
Read the full account →A MCV and broader mid-level trough crossed the central Appalachians and triggered strong to severe thunderstorms from the central ridges into the Susquehanna River Valley during the afternoon and evening.
Read the full account →The remnants of Tropical Storm Lee moved northward from the southern Appalachians on the 6th to the middle Atlantic states on the 7th before stalling on the 8th.
Read the full account →Heavy rainfall from the remnants of Tropical Storm Lee produced widespread flooding, flash flooding and river flooding mainly near and to the east of the Susquehanna Valley from September 4-10.
Read the full account →Hurricane Floyd battered Eastern Pennsylvania (especially Southeast sections around Philadelphia) on September 16th and brought with it torrential and in some places record breaking rains and damaging winds.
Read the full account →The remnants of Hurricane Jeanne interacting with two frontal boundaries in the region caused torrential downpours to occur during the late afternoon and evening of the 28th.
Read the full account →Tropical Storm Isaias brought high winds, heavy rain, several tornadoes, and coastal flooding to the mid-Atlantic region, becoming the most impactful tropical cyclone to impact most of the region since Sandy in 2012.
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 →Tropical Storm Isaias brought high winds, heavy rain, several tornadoes, and coastal flooding to the mid-Atlantic region, becoming the most impactful tropical cyclone to impact most of the region since Sandy in 2012.
Read the full account →Irene produced heavy flooding rain, tropical storm force wind gusts with hundreds of thousands of outages, moderate tidal flooding along the Delaware River and one flooding related death in Eastern Pennsylvania over the weekend of August 27th and 28th.
Read the full account →Irene produced heavy flooding rain, tropical storm force wind gusts with hundreds of thousands of outages, moderate tidal flooding along the Delaware River and one flooding related death in Eastern Pennsylvania over the weekend of August 27th and 28th.
Read the full account →A slow moving cold front coupled with a deep southerly flow of very moist air caused slow moving and in some instances back building thunderstorms to occur during the afternoon and evening of the 28th.
Read the full account →An advancing warm front promoted heavy rain and thunderstorms during the afternoon of March 28th. Substantial breaks in the clouds south of the boundary, along with substantial warm air advection, resulted in around 1500 J/kg of mean-layer CAPE, and substantial (60kts+)…
Read the full account →Showers and thunderstorms developed along a warm front across northern Pennsylvania in the afternoon and evening of the 22nd. With a tropical air mass in place, rainfall became very efficient especially over southern Armstrong and central Indiana counties in Pennsylvania.
Read the full account →Strong to severe thunderstorms brought heavy rain to parts of eastern Pennsylvania, and to parts of northern and central New Jersey during the late afternoon and evening hours of May 29.
Read the full account →Moisture from the remnants of tropical storm Bonnie moved northward into the region and interacted with a frontal boundary over the region. This resulted in several rounds of heavy rain on the night of the 29th and the early morning of the 30th.
Read the full account →I persistent upper level flow of moist southerly air brought waves of flooding and flash flooding to the region. Significant flooding was reported across eastern portions of the area.
Read the full account →I persistent upper level flow of moist southerly air brought waves of flooding and flash flooding to the region. Significant flooding was reported across eastern portions of the area.
Read the full account →The remnants of Tropical Storm Lee that interacted with a stalled frontal boundary produced several days with periods of heavy rain across Eastern Pennsylvania from the 5th into the 8th.
Read the full account →Heavy rainfall between 1 and 2 inches over northwest Pennsylvania and 2 to 4 inches across central and eastern Pennsylvania combined with snowmelt in the northern mountains to produce significant flooding. The worst flooding occurred over the eastern half of the Commonwealth.
Read the full account →Irene produced heavy flooding rain, tropical storm force wind gusts with hundreds of thousands of outages, moderate tidal flooding along the Delaware River and one flooding related death in Eastern Pennsylvania over the weekend of August 27th and 28th.
Read the full account →The remnants of Hurricane Ivan interacting with a slowly moving cold front caused widespread very heavy rain to fall from late in the evening on the 17th until around 10 a.m. EDT on the 18th.
Read the full account →