FloodZoneMap.org

Flash Flood — Beaver, PA

May 28, 2019

Mid-level westerly flow of 45-70kts streamed over the Great Lakes/Upper Ohio Valley. A shortwave trough embedded within this zonal flow entered the region and moved eastward throughout the day, helping to provide forcing for ascent and strengthening of deep layer shear. Mid-level westerly flow of 45 to 70 knots also streamed over the Great Lakes and the Upper Ohio Valley. Large hail was supported by mean layer CAPE of 1500 to 3000 J/kg and effective bulk shear of 35 to 50kts. Additionally, stro

Source: NOAA National Weather Service Storm Events Database (event 824995). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Beaver, PA

This event is one of many recorded floods in Beaver County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Beaver County flood data →

More Flood Stories

Flood$1.0M damage

Beaver, PA · May 29, 2019

The risk for severe storms continued May 29th as necessary ingredients stayed in place. An unstable/ buoyant atmosphere, wind shear to sustain updrafts, and large scale |ascension with a crossing shortwave were all present.

Read the full account →
Flash Flood

Beaver, PA · Jun 6, 2025

Several rounds of thunderstorms trained over portions of Lawrence, Allegheny, Westmoreland Clarion and Beaver counties on June 6th. This was a result of a very moist airmass and a stationary boundary located over northern Ohio and northwestern Pennsylvania.

Read the full account →
Flash Flood

Beaver, PA · Jun 6, 2025

Several rounds of thunderstorms trained over portions of Lawrence, Allegheny, Westmoreland Clarion and Beaver counties on June 6th. This was a result of a very moist airmass and a stationary boundary located over northern Ohio and northwestern Pennsylvania.

Read the full account →
Flash Flood$25K damage

Beaver, PA · Mar 28, 2020

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 →