A weak trough and remnant outflows initiated afternoon thunderstorms. Initial single cell development across eastern Ohio ultimately congealed along propagating cold pools and surged southeast.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PBZ wrote it up.
A weak trough and remnant outflows initiated afternoon thunderstorms. Initial single cell development across eastern Ohio ultimately congealed along propagating cold pools and surged southeast. A rich moisture environment was in place with 1000-2000 J/kg MLCAPE and near 30 knots of effective shear. The storms rolled into more favorable DCAPE, as high as 1200 J/kg, farther southeast, and repeated updrafts along outflow produced swaths of damaging wind.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pittsburgh, PA wrote its last area forecast discussion before the first event at Jul 26, 12:48 PM EST, 3 hours 48 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 148 PM EDT Sat Jul 26 2025 .SYNOPSIS... Shower and thunderstorm chances continue today as a front lifts north across the region. Additional showers and thunderstorms are expected Sunday as the front drifts back to the south. Locally heavy rain and strong wind gusts are possible in some of the storms. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Showers and thunderstorms increase again this afternoon - Isolated instances of damaging wind and flash flooding possible - Hot and humid this afternoon; heat indices of 95 to 100 --------------------------------------------------------------- Earlier shower and thunderstorm activity associated with the first in a series of shortwaves has exited to the east. It deposited a band of 1 to 1.5 inches of rain near and north of I-80, with pockets of up to 2.5 inches in Jefferson County PA. Lesser amounts were observed to the south. The next shortwave will track across northern OH/southern Ontario this afternoon and evening, helping to push our lingering surface boundary northward as a warm front. With 1000-2000 J/kg of MLCAPE and no capping aloft, scattered to numerous storms are forecast to develop during the afternoon, with coverage best north of Pittsburgh associated with the shortwave. The air mass remains soupy, with precipitable water in the 1.8 to 2.1 inch range currently (the 12Z PBZ sounding measured 2.02 inches). These values will actually decrease slightly this afternoon as some drier mid-level air arrives this afternoon, visible on water vapor loops. Even so, these reduced values remain at the top end of climatology, so rainfall will continue to be efficient. The drier air aloft will also increase the potential for downburst winds in the stronger storms. DCAPE may increase into the 800-1000 J/kg range for a portion of the region, supporting this. Deep shear will remain relatively modest, on the order of 25 to 30 knots, but it may be enough to allow for some limited storm organization/cold pool conglomeration that may also support a wind risk. Isolated instances of flash flooding remain possible as well, given the high PWAT and respectable warm cloud depth. Winds aloft also favor some backbuilding/training of cells that could locally enhance rainfall totals. HREF shows maximum 6-hour rainfall potential in the range of 1.5 to 2.5 inches. Think that instances of flash flooding will remain isolated enough to preclude the need for a flood watch, although areas that received heavier rain this morning north of Pittsburgh will have a bit more elevated threat. Temperatures in the upper 80s to near 90 and dewpoints in the lower to mid 70s will lead to heat indices of 95 to 100 this afternoon, with perhaps a few downtown/valley locations rising a bit above 100. Yet another shortwave will cross the region overnight. Although storm intensity should be lower after sunset as overall instability diurnally decreases, at least scattered showers and thunderstorms can be expected overnight, again with best coverage north of Pittsburgh, Elevated instability should help to maintain thunder chances. Another warm and muggy night, with lows in the lower 70s for many. && .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... KEY MESSAGES: - More showers and thunderstorms Sunday. - Locally heavy rainfall and gusty wind possible in Sunday storms. - Hot with low chances for afternoon showers/storms Monday. ---------------------------------------------------------------- Tomorrow morning, a shortwave trough will pass through the region and the flow aloft will veer to the NW. This will move the surface boundary SE across the area on Sunday. Showers/storms are expected with the morning shortwave, however, they are expected to become more numerous as the front crosses the area in the afternoon. The 0- 6km shear will be near 30kt during the start of the day and weaken into the afternoon. Even with weakening shear, there is 2500-3000 J/kg most-unstable CAPE during the early evening with DCAPE between 750-850 J/kg. This could result in a Marginal Risk for severe storms with wind being the primary concern as there would not be enough shear to support hail growth. The showers/storms should end by Sunday evening as the front shifts south and dissipates, and as shortwave ridging begins to build across the area. Most of Monday is expected to be dry, as an upper high builds across the Central CONUS. The Upper Ohio Valley region is expected to be on the NE periphery of the high in NW flow with a weak shortwave trough expected to approach and cross the region during the afternoon. This could spark a few showers/storms with its passage. Mainly dry weather should return Monday night after the passage of the wave. The heat will return Monday as well, with highs around 90 for most locations. && .LONG TERM /TUESDAY THROUGH FRIDAY/... KEY MESSAGES: - Hot weather continues through mid week. - Mainly dry Tuesday and Wednesday. - Showers/storms return Wednesday night and Thursday. - Cooler and less humid by late week into the weekend. ------------------------------------------------------------------- Model ensembles indicate the Central CONUS upper high will persist through mid week. The Upper Ohio Valley region will remain on the NE periphery of the high, under NW flow aloft. At this time, ensembles indicate little shortwave support for precip during the day Tuesday and Wednesday, though isolated storms are possible. The high is progged to weaken and retrograde west late Wednesday into Thursday. An increasingly amplified pattern will build across the northern CONUS, with a prominent trough across the NE CONUS. A shortwave embedded in the main trough, along with a surface cold front, are expected to approach and cross the region Wednesday night into Thursday, with shower and thunderstorm chances. Dry, cooler, and less humid weather is expected by Friday as high pressure builds in. Dry and relatively seasonable temperatures are expected to persist throughout the weekend. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... Generally VFR conditions are in place at 18Z, although some lower stratocumulus remains at FKL/DUJ; this should mix out over the next hour to a cumulus deck. As a boundary lifts north as a warm front this afternoon, the next in a series of shortwaves will support the development of scattered to numerous showers and thunderstorms this afternoon, with coverage highest north of PIT. Timing between now and sunset is fairly tricky, and used fairly wide 3-hour TEMPO (PIT on north) or PROB30 (south of PIT) groups to try to give the best timing. Any storm will be capable of heavy rain/brief IFR visibility, as well as gusty wind. Outside of precipitation, wind will be light out of the southwest with scattered to broken cumulus. A relative lull in activity is expected this evening, with generally VFR conditions. Yet another shortwave will cross tonight, maintaining shower and thunderstorm chances, although intensity should drop off a bit as storms become elevated once again. Again, chances are a bit better north of PIT, and used prevailing SHRA/TEMPO TSRA where chances are highest, generally between 06Z and 13Z. A low stratocumulus deck is expected to develop overnight even away from showers, with MVFR/IFR ceilings. Cannot rule out some patchy fog as well, especially where heavy rain occurs. Gradual improvement is expected past sunrise, with some lingering showers into mid-morning. By midday, low VFR/high MVFR ceilings are forecast, with a developing light west wind. Another round of afternoon convection is possible, mainly after 18Z. Outlook... Daily showers and thunderstorm chances, with restriction chances, will continue into early next week with a series of disturbances. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...CL NEAR TERM...CL SHORT TERM...Lupo LONG TERM...WM/Lupo AVIATION...CL
Hazardous Weather Outlook National Weather Service Pittsburgh PA 149 PM EDT Sat Jul 26 2025 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020-022- WVZ001>004-012-271800- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Armstrong-Hancock-Brooke- Ohio-Marshall-Wetzel- 149 PM EDT Sat Jul 26 2025 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...This afternoon and tonight. There is a Marginal Risk, or level 1 out of 5, for severe thunderstorms this afternoon and evening. The main hazard is expected to be damaging wind gusts. In addition, showers and thunderstorms could produce locally heavy rainfall, which could result in localized flash flooding this afternoon and evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Showers and thunderstorms could produce locally heavy rainfall on Sunday, which could result in localized flash flooding. Monday through Wednesday, expect the return of heat indices in the upper 90s to 100F. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. PAZ021-029-031-073>078-WVZ021-509>514-271800- Allegheny-Washington-Greene-Westmoreland- Higher Elevations of Westmoreland-Fayette- Higher Elevations of Fayette-Indiana-Higher Elevations of Indiana- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 149 PM EDT Sat Jul 26 2025 This Hazardous Weather Outlook is for southwest Pennsylvania, western Pennsylvania and northern West Virginia. .DAY ONE...This afternoon and tonight. There is a Marginal Risk, or level 1 out of 5, for severe thunderstorms this afternoon and evening. The main hazard is expected to be damaging wind gusts. In addition, showers and thunderstorms could produce locally heavy rainfall, which could result in localized flash flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday. There is a Marginal Risk, or level 1 out of 5, for severe thunderstorms on Sunday. The main hazard is expected to be damaging wind gusts. There is a Marginal Risk, or level 1 out of 4, for excessive rain on Sunday. Showers and thunderstorms could produce locally heavy rainfall, which could result in localized flash flooding. Monday through Wednesday, expect the return of heat indices in the upper 90s to 100F. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. Lupo
The Pittsburgh radar (KPBZ), 77 km away, was scanning. The volume nearest the first event began at 21:34 UTC.
9 thunderstorm wind, 9 flash flood. Local standard time, as filed.
Report of trees down along Lewisville Road.
Report of a utility line down along Newport Road.
Report of a tree down along Cramer Road.
Report of trees down on wires along Hamel Road.
Report of tree down along Bonniebrook Road near Route 422.
Report of trees down on wires along Logan Road.
Reports of multiple trees and power lines down in the area.
Report of multiple trees and power lines down in Middlesex Township.
Report with images of snapped trees along McGrady Hollow Road.
Report of a couple of trailers surrounded by water with water rescue crews assisting in evacuation.
Report of Chartiers Creek out of its banks with water running across the road and entering business at least ankle deep.
Report of four vehicles stranded with water up to their doors near State Route 19 and Interstate 79 close to Little Tenmile Creek.
Report of flooding on Jolly School Road near Interstate 70.
Report of Park Avenue flooded near the Washington County Airport.
Report and video of water rushing through the Glen Meadows Trailer Park and damaging trailer homes.
Report of flooding over Brookhaven Avenue that is preventing entry and exit of mobile homes.
Report of flooding along Green Valley Road just north of U.S. 40.
Report of three feet of water in a building.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2025Every state in 2025This day in weather historyWarnings in Pennsylvania, July 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1278646, 1278647, 1278649, 1278650, 1278651, 1278654, 1278656, 1278663, 1278668, 1280541, 1280542, 1280550, 1280551, 1280554, 1280555, 1280557, 1280558, 1280559.