Scattered showers and storms moved across the region during the afternoon as a front crossed the region. Most convection was sub-severe early on with meager CAPE and effective shear, however, convection intensified east of Pittsburgh as the ongoing convection encountered a more unstable air mass.
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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.
Scattered showers and storms moved across the region during the afternoon as a front crossed the region. Most convection was sub-severe early on with meager CAPE and effective shear, however, convection intensified east of Pittsburgh as the ongoing convection encountered a more unstable air mass. Damaging winds were the only threat with convection.
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 Aug 17, 12:25 PM EST, 0 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 125 PM EDT Sun Aug 17 2025 .SYNOPSIS... Needed rainfall is possible through this evening with a passing disturbance, otherwise most will be dry the upcoming work week. Monday will be the coolest day with highs right where they should be this time of year. It doesn't last long with the mercury going up through mid week to highs well into the 80s, but will fall short of 90. The best shot of getting a drink for our parched lawns arrives midweek and it is a low probability. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Scattered showers and thunderstorms this evening, dissipating after sunset. - Quiet weather tonight with seasonable low temperatures. --------------------------------------------------------------- Scattered showers and thunderstorms are ongoing across the area this afternoon as a weak surface trough moves through the area. A few of the strongest storms are producing wind gusts up to 45 mph and a quick 0.5 to 0.75 inches of rainfall, but overall the severe and flooding threats remain low. Expect this activity to taper off towards sunset with the loss of diurnal heating, followed by quiet weather overnight with low temperatures hovering around seasonal normals. && .SHORT TERM /MONDAY THROUGH WEDNESDAY NIGHT/... KEY MESSAGES: - "Coolest" day of the week is Monday - Needed rainfall could occur Tuesday / Wednesday ---------------------------------------------------------------- There will be intervals of smoke aloft early this week with an uptick in wildfire reports out west and in Canada. We do not anticipate any impacts at the surface given projections of concentration and looking upstream states with no air quality statements ongoing. As we remain in a dry stretch this August, the forecast trend is following suit for this time frame. Despite a weakening shortwave trough passing through Tuesday night into Wednesday, southeast wind and downward vertical motion on the west side of Hurricane Erin should keep the column dry enough that precip coverage won't be much if any at all. This is evident in the pop 12 hour profile from the NBM with a shadow effect across northern WV and through most of western PA Tuesday and Tuesday night. Values are highest where we normally would expect with this low level wind regime across eastern parts of Tucker and Preston counties north into eastern sections of Indiana and Jefferson. Again, a wetting rain might be tough to come by if a shower does form given probs of of tenth of an inch or greater is around 30% Wednesday night into Thursday and mainly in the mountains. Temperatures after a seasonable Monday with values ranging from the upper 70s to lower 80s, climb between 2-4F areawide Tuesday and hover there the remainder of the short term. Humidity will be on the increase as overnight lows bottom out in the lower to mid 60s. You can see this in the PWAT profiles as we start out Monday with values less than an inch /in some cases 0.8" over northern PA/, but they quickly rebound to 1.5" Tuesday and Wednesday. The plume of the real muggy air will stay west of our region. Confidence is high of no severe thunderstorm or flash flood threat through mid week. && .LONG TERM /THURSDAY THROUGH SUNDAY/... KEY MESSAGES: - More dry days on tap - Temperatures above average ------------------------------------------------------------------- Overall the cluster analysis illustrates good agreement in the long wave pattern dominated by a mid level anticyclone in the southwest and a transitory trough moving across southern Canada into the northern United States by next weekend. Where things become less certain is with the amplification of the aforementioned mid level trough when it reaches the Great Lakes by next weekend. This doesn't have an impact on us with respect to precipitation chances until day 6 and 7 of the forecast. Trends continue to be drier during the late week window as the result of subsidence on the west side of Hurricane Erin and the baroclinic zone being well to our south in the heart of Dixie. Elevated heat source will be the primary trigger for showers and storms during peak heating hours. NBM 25-50th percentile precip numbers for Thursday and Friday are zilch, while the mean remains at a few hundredths. Will continue to keep these numbers on the downward trend with values equating to slight chance to at most chance verbiage in text forecasts. The good news is that it doesn't appear we will be adding to our tally of 90F days at any of our climate sites. The probability of exceeding 89F for the long term is 10% or less. Meanwhile, our air conditioners will get a break at night as well given lower to mid 60s will be common. We are in the single digit percentages of seeing overnight lows stay warmer than 70F at any of our six climate locations. && .AVIATION /18Z SUNDAY THROUGH THURSDAY/... Scattered showers and thunderstorms are ongoing across the area this afternoon, with a few storms becoming strong enough to produce wind gusts up to 40 knots and LIFR visibilities. Expect convection to continue through the rest of the afternoon and early evening before tapering off towards sunset, with quieter weather forecast overnight. Outside of convection, a mix of VFR cigs ahead of the cold front and MVFR cigs behind the front are prevailing. Widespread MVFR/IFR ceilings settle in at least briefly overnight as the front moves through the rest of the area and stalls around the Mason-Dixon. Conditions return to VFR Monday morning with the onset of daytime heating/mixing. Outlook... VFR weather returns Monday and Tuesday. There could be patchy fog Monday morning depending on where it rains Sunday. Additional rounds of showers and thunderstorms bring restrictions back to the area Wednesday and Thursday. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...McMullen NEAR TERM...Cermak SHORT TERM...McMullen LONG TERM...McMullen AVIATION...Cermak
Hazardous Weather Outlook National Weather Service Pittsburgh PA 856 AM EDT Sun Aug 17 2025 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- 031-073>078-WVZ001>004-012-021-509>514-181300- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong- Washington-Greene-Westmoreland-Higher Elevations of Westmoreland- Fayette-Higher Elevations of Fayette-Indiana- Higher Elevations of Indiana-Hancock-Brooke-Ohio-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 856 AM EDT Sun Aug 17 2025 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Pittsburgh radar (KPBZ), 54 km away, was scanning. The volume nearest the first event began at 17:24 UTC.
9 thunderstorm wind. Local standard time, as filed.
Multiple trees were reported down at a residence along Baughman Lane.
Several trees were reported down in Greensburg.
Several trees were reported down in Unity township.
Over 20 trees were reported down within the parking lot area of Fallingwater.
A tree was reported down onto a vehicle along Mill Run Road.
A tree was reported down and on a vehicle along Holland Hill Road.
A tree was reported down along Sugar Loaf Road.
A tree was reported down on powerlines along Mae West Road.
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, August 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: 1281668, 1281669, 1281670, 1281676, 1281673, 1281671, 1281672, 1281675, 1281674.