2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
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 →A line of pre-frontal convection developed well ahead of an approaching cold front in a moderate CAPE and moderate shear environment over central Pennsylvania during the afternoon of August 4, 2017.
Read the full account →Rich tropical moisture remained across the Northeast region. Precipitable water values continued to be high at 1.90 to 2.00 inches. Morning soundings showed very little upper level flow.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →A line of thunderstorms developed east of Cleveland from a breeze off of Lake Erie near 17Z. Areas south and east of the line gave way to more storms as outflow boundaries converged. With high PWAT values (near 1.90) flash flooding became an issue with training storms.
Read the full account →An upper-level trough remained in place over the region on August 5th. Instability was sufficient for the generation of numerous showers and thunderstorms, especially north of Pittsburgh, but relatively low CAPE and shear levels kept storms sub-severe.
Read the full account →An upper-level trough remained in place over the region on August 5th. Instability was sufficient for the generation of numerous showers and thunderstorms, especially north of Pittsburgh, but relatively low CAPE and shear levels kept storms sub-severe.
Read the full account →Tropical Storm Gordon made landfall near the Mississippi-Alabama border on the 4th. It slowly moved north through the Ohio Valley for the next week. This left Pennsylvania in an extremely moist southerly flow with widespread showers and thunderstorms through the period.
Read the full account →Tropical Storm Gordon made landfall near the Mississippi-Alabama border on the 4th. It slowly moved north through the Ohio Valley for the next week. This left Pennsylvania in an extremely moist southerly flow with widespread showers and thunderstorms through the period.
Read the full account →Tropical Storm Gordon made landfall near the Mississippi-Alabama border on the 4th. It slowly moved north through the Ohio Valley for the next week. This left Pennsylvania in an extremely moist southerly flow with widespread showers and thunderstorms through the period.
Read the full account →Tropical Storm Gordon made landfall near the Mississippi-Alabama border on the 4th. It slowly moved north through the Ohio Valley for the next week. This left Pennsylvania in an extremely moist southerly flow with widespread showers and thunderstorms through the period.
Read the full account →Tropical Storm Gordon made landfall near the Mississippi-Alabama border on the 4th. It slowly moved north through the Ohio Valley for the next week. This left Pennsylvania in an extremely moist southerly flow with widespread showers and thunderstorms through the period.
Read the full account →Yet another day of showers and thunderstorms with heavy rain passed over Allegheny county, Pennsylvania. After 3 prior days of rain, flash flood guidance was less than an inch over the region.
Read the full account →Yet another day of showers and thunderstorms with heavy rain passed over Allegheny county, Pennsylvania. After 3 prior days of rain, flash flood guidance was less than an inch over the region.
Read the full account →Yet another day of showers and thunderstorms with heavy rain passed over Allegheny county, Pennsylvania. After 3 prior days of rain, flash flood guidance was less than an inch over the region.
Read the full account →Yet another day of showers and thunderstorms with heavy rain passed over Allegheny county, Pennsylvania. After 3 prior days of rain, flash flood guidance was less than an inch over the region.
Read the full account →Slow-moving thunderstorms with heavy rain developed along a stalled boundary across the upper Ohio Valley on the 5th through the 6th. A very warm and moist conditions supported heavy rainfall rates that lead to flooding in several counties across the region.
Read the full account →Slow-moving thunderstorms with heavy rain developed along a stalled boundary across the upper Ohio Valley on the 5th through the 6th. A very warm and moist conditions supported heavy rainfall rates that lead to flooding in several counties across the region.
Read the full account →Slow-moving thunderstorms with heavy rain developed along a stalled boundary across the upper Ohio Valley on the 5th through the 6th. A very warm and moist conditions supported heavy rainfall rates that lead to flooding in several counties across the region.
Read the full account →Slow-moving thunderstorms with heavy rain developed along a stalled boundary across the upper Ohio Valley on the 5th through the 6th. A very warm and moist conditions supported heavy rainfall rates that lead to flooding in several counties across the region.
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