96
Recorded events
0
Direct deaths
0
Direct injuries
$2.3M
Property damage
Flash Flood in Lawrence County, Pennsylvania: 96 recorded events between 1996 and 2026. The strongest on record measured 0. That places the county #182 nationally and #16 statewide for this hazard.
Decade by decade
Flash Flood in Lawrence County, Pennsylvania: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Lawrence County is the 2020s, when 38 of the county's 96 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Lawrence County archive, flash flood makes up 16.2% of all recorded severe weather across 6 hazard types. Nationally the county sits at #182 for this hazard and #16 within Pennsylvania, putting it in the 94.1 percentile of all U.S. counties.
Seasonality
Events by month
Jul is the peak month for flash flood in Lawrence County with 27 recorded events, while Oct is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Mar 31, 2026 | NEW BEDFORD | — | $0 |
| Mar 31, 2026 | WILMINGTON JCT | — | $0 |
| Jul 14, 2025 | CHEWTON | 0 | $0 |
| Jul 14, 2025 | NEW CASTLE JCT | 0 | $0 |
| Jul 14, 2025 | WIEGLETOWN | 0 | $0 |
| Jul 14, 2025 | UNION VLY | 0 | $0 |
| Jul 14, 2025 | NEW CASTLE JCT | 0 | $0 |
| Jun 6, 2025 | UNION VLY | 0 | $5K |
| Jun 6, 2025 | WIEGLETOWN | 0 | $5K |
| Jun 6, 2025 | MAHONINGTOWN | 0 | $2K |
Other hazards here
More from Lawrence County
- Thunderstorm Wind 354
- Hail 105
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Three to five inches of rain fell in southwest Lawrence over a 3 hour period. At least eight homes were impacted by flooding in Wayne and Shenango Townships. Numerous roads were closed in the area and several water rescues from houses and cars were performed by local firefighters. The most significant damage in Shenango Township occurred around Union Valley, Snake Run, and Lower Boyd School Roads, the latter of which was undermined, creating damage to the asphalt. Roads impacted in Wayne Township included Shenango Stop, Union Valley, Snake Run, Chewton-West Pittsburg, Fletcher Hill, Boyd School, Lower Boyd School, Old Pittsburgh, and Union Valley Roads. McKee Run was reported to overflow its banks.||The Lawrence County Commissioners issued a disaster declaration for the entire county, with the Shenango and Wayne Township supervisors adopting similar measures for their respective municipalities.
Thunderstorms moving across the county dumped over 3 inches of rainfall, producing widespread flash flooding across the county. Numerous reports of basement flooding were reported. In New Castle, the water roared down one street with such force it lifted the blacktop off of the road. Many motorists were trapped inside their vehicles in flooded intersections, with one vanload of children trapped on a New Castle street. Despite the widespread flooding, no injuries were reported.
Thunderstorm rains procuded street and basement flooding across the county. Several vehicles became stranded in flooded roadways. In New Castle, several businesses reported up to a foot of water in their stores, ruining carpeting and inventory. An assisted-living center in Neshannock Township reported several inches of water through their first floor. No residents were injured. In addition, many homes across the area reported basement flooding.
Quick answers
Frequently asked
How many flash flood events are on record in Lawrence County, Pennsylvania?
96 flash flood events are recorded in Lawrence County between 1996 and 2026, causing 0 direct deaths.
What is the strongest flash flood recorded in Lawrence County?
The strongest flash flood on record in Lawrence County measured 0.
Where does the flash flood data for Lawrence County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flash Flood in Lawrence County, Pennsylvania.” Severe Weather History. severeweatherhistory.com/county/pennsylvania/lawrence-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.