2,274 first-hand accounts of flood events in Pennsylvania, ranked by impact. Each is a NOAA-written narrative of the moment.
A cold front dropped across Pennsylvania during the afternoon hours of October 4th. A line of thunderstorms accompanied the front, dropping 1.0 to 1.5 inches of rain across urban portions of Allegheny and Westmoreland Counties in a short period of time.
Read the full account →A cold front dropped across Pennsylvania during the afternoon hours of October 4th. A line of thunderstorms accompanied the front, dropping 1.0 to 1.5 inches of rain across urban portions of Allegheny and Westmoreland Counties in a short period of time.
Read the full account →A cold front dropped across Pennsylvania during the afternoon hours of October 4th. A line of thunderstorms accompanied the front, dropping 1.0 to 1.5 inches of rain across urban portions of Allegheny and Westmoreland Counties in a short period of time.
Read the full account →The Pittsburgh region continued to sit under an upper level ridge while tropical moisture lingered in the Northeast U.S. Sufficient instability allowed for a few strong storms to develop, causing tree damage.
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 →For the second time in a week, extensive urban and lowland flooding was reported across Erie and Crawford Counties. The remnants of Ivan moved across the Ohio Valley on September 17th.
Read the full account →Slowly westward moving thunderstorms that formed along a backdoor cold front caused flash flooding in parts of Northampton and Upper Bucks Counties during the evening of the 15th. Reported event precipitation totals reached 2 to 3 inches.
Read the full account →The remnants of Sandy brought a variety of weather impacts to western Pennsylvania, eastern Ohio, northern West Virginia, and Garrett county Maryland as the storm made landfall and interacted with a cold front essentially right over the region.
Read the full account →Hurricane Irene brought heavy rains and high winds from northeast Pennsylvania to the Catskill Mountains of New York from Saturday evening the 27th to Sunday afternoon the 28th.
Read the full account →A significant severe weather and flash flood outbreak developed across northeast Pennsylvania as a storm system moved east from the Great Lakes. Thunderstorms with damaging winds and very heavy rain developed and moved across the area during the overnight hours on the 28th.
Read the full account →An upper level impulse moving along a wavy frontal boundary produced scattered thunderstorms with very heavy rainfall the morning of the 3rd. Some roads were closed due to flash flooding in Beaver county, while radar estimated nearly 4 inches of rain fell in 2 hours northeast of…
Read the full account →An upper level impulse moving along a wavy frontal boundary produced scattered thunderstorms with very heavy rainfall the morning of the 3rd. Some roads were closed due to flash flooding in Beaver county, while radar estimated nearly 4 inches of rain fell in 2 hours northeast 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 →Widespread flash flooding was reported in Pittsburgh and throughout Allegheny County. Heavy thunderstorm rains dropped 1.62 inches of rain in 45 minutes at the National Weather Service Office in Moon Township. Runoff from the rain flooded many streets in Moon Township.
Read the full account →A cold front associated with a surface low pressure system centered over Lake Superior approached the region late Tuesday, November 30th. Abundant moisture and temperatures above freezing ahead of the cold front allowed for most of the precipitation to fall as heavy rain.
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 →A slow moving storm from the Ohio Valley brought 2 to 4 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 →Major flooding occurred as thunderstorms stalled and dumped torrential rains across the St. Thomas area west of Chambersburg. Up to 12 inches of rain fell in the area overnight, washing out roads and flooding homes.
Read the full account →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 cold front moved across New York and became stationary over northeast Pennsylvania during the late afternoon. Torrential rain producing thunderstorms formed within the tropical-like environment and moved slowly over the same areas.
Read the full account →Two to four inches of rain fell on Erie County on September 8th through the early morning hours of the 9th. This rain was associated with the remnants of Tropical Storm Frances. Runoff from the rain caused lowland flooding to begin during the evening hours.
Read the full account →A slow moving storm from the Ohio Valley brought 2 to 4 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 →Upper level shortwave provided the support for shower and thunderstorm development in the afternoon on the 29th. Thunderstorms with heavy rain passed over Allegheny county, where over 2 inches of rain fell in an hour based on local observations.
Read the full account →Slow moving, heavy rain producing thunderstorms crossed the metropolitan areas of Northeast Pennsylvania during the late afternoon and evening. Rainfall amounts between 3 and 6 inches over a span from 90 minutes to 2 hours were common in many areas.
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