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.
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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.
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. Flash flooding was reported in the aforementioned counties with considerable flooding noted in Allegheny county.
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 Jun 6, 9:46 AM EST, 1 hour 38 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 1046 AM EDT Fri Jun 6 2025 .SYNOPSIS... A stationary front will remain across the region today and tonight, and will provide the focus for periodic showers and thunderstorms. Some storms could be severe and could contain locally heavy rain this afternoon and evening. The front will drift south Saturday, with shower and storm chances diminishing. Unsettled weather is then expected Sunday through Tuesday with a series of crossing disturbances. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... KEY MESSAGES: - Additional rounds of showers and thunderstorms today - Marginal Risk for severe storms this afternoon - Locally heavy rainfall possible --------------------------------------------------------------- Updated to refresh near-term grids based on radar/ob trends. Subtle shortwave/vort max was responsible for morning thunderstorms that produced locally heavy rainfall in portions of eastern Ohio and southwest PA. Morning sounding measured 1.68 inch precipitable water values, which is near the climatologic maximum for early June, highlighting the ongoing heavy rainfall threat. The marginal (level 1 out of 5) risk for damaging wind gusts remains. Downdraft CAPE will be less favorable today, but a bit deep-layer shear will be present, which will allow for storm organization and some isolated damaging gusts. Previous discussion... A stationary front was analyzed across northern Ohio into NW PA. This front will remain quasi stationary today with the flow aloft parallel to the front. Individual vort maxes embedded in the westerly flow aloft will provide additional ascent for showers and thunderstorms today. One shortwave is expected to cross the area this morning, bringing an increase in showers and a few storms. These showers and isolated thunderstorms have recently developed across Ohio as this wave approaches. A surface wave is expected to develop along the front this afternoon, as it tracks across the Upper Ohio Valley region. This should bring another increase in showers and thunderstorms. Building diurnal instability is progged through the day, with mean MU CAPE values ranging from 1000-1500 j/kg. An increase in the mid and upper level flow should result in more shear than yesterday, with 0-6km values from 30-40kt. This could result in a few organized storms across the region, with a damaging wind potential. The Storm Prediction Center has included most of the area in a Marginal Risk, or level 1 out of 5, for severe storms this afternoon and early evening. PWATS remain elevated at around 1.5 inches. Locally heavy rainfall is possible, though storm motion should be faster than today. Still, if any area receives multiple storms, localized flash flooding will be possible. Will include this potential in the Hazardous Weather Outlook and add a mention of locally heavy rain to the forecast grids. The threat appears to be too localized for a flash flood watch at this time. && .SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/... KEY MESSAGES: - Marginal Risk for severe storms early this evening - Locally heavy rainfall possible especially this evening - Decreased rain chances Saturday - Increasing showers/storms Sunday ---------------------------------------------------------------- The surface wave will continue to track east along the front early this evening. Showers and thunderstorms will continue, along with a marginal potential for damaging wind gusts and locally heavy rain. MU CAPE quickly diminishes this evening after the passage of the surface wave. Expect the severe weather potential to end early this evening with the loss of surface based instability, though elevated instability could still support a few storms overnight. Another crossing shortwave trough is progged for a Friday night passage, with showers and a few thunderstorms continuing. The resulting WNW flow behind this trough should help to push the front south of the region on Saturday. Expect an overall decrease in POPS from N-S, with most areas from PIT northward staying dry. Areas to the south will still be in closer proximity to the front, with shower and isolated thunderstorm chances continuing. Saturday evening should be dry with the front to our south. Another shortwave trough is expected to advance out of the Midwest Saturday night, along with a developing surface low. The trough will cross th Upper Ohio Valley region on Sunday, as the surface low tracks across the Great Lakes, pulling the front back north as a warm front. Increasing shower and thunderstorm chances are expected again during the day with the approach and passage of the shortwave trough and warm front. There is also a potential for severe storms Sunday with increasing shear and instability, though details will be monitored over the next couple of days. The front should lift north of the region Sunday night, as the shortwave trough exits. Expect showers and thunderstorms to taper off Sunday evening, and end overnight. && .LONG TERM /MONDAY THROUGH THURSDAY/... KEY MESSAGES: - Unsettled weather Tuesday - Dry and less humid weather returns Wednesday and Thursday ------------------------------------------------------------------- Model ensembles indicate a deep trough across the Upper Midwest on Monday, advancing eastward through the day. Expect shower and thunderstorm chances to increase again Monday with moisture and ascent overspreading the region in SW flow ahead of the trough. The highest shower and thunderstorm chances are expected on Tuesday, as the trough axis crosses the region. The trough is expected to exit the region on Wednesday, as surface high pressure begins to build in. This should return dry weather to the region Wednesday and Thursday. Temperatures should average near seasonable levels through midweek, before rising 500 mb heights and a building ridge return readings to above average by Thursday. && .AVIATION /15Z FRIDAY THROUGH TUESDAY/... First wave of showers and isolated thunderstorms is crossing the area this morning. Cigs have and will continue to quickly lower into MVFR/IFR except south and east of PIT (MGW/LBE). Showers will become spottier again by midday with gradual cig improvement. Scattered showers and thunderstorms are likely after 18z today as convective temperatures are reached. Covered this threat with PROB30s given scattered nature of potential thunderstorms. Lingering showers/storms will diminish near 00z as cigs lower into IFR areawide. Restrictions will overnight continue through much of Saturday morning. Outlook... Widespread MVFR/IFR ceiling restrictions are expected into Saturday as a series of shortwaves brings continued shower and thunderstorm chances. These are likely to lift Saturday afternoon with brief drying. Crossing low pressure will renew restriction potential with rain on Sunday, with additional waves of rain expected Monday into Tuesday. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...WM NEAR TERM...WM/CL SHORT TERM...WM LONG TERM...WM AVIATION...Rackley
Hazardous Weather Outlook National Weather Service Pittsburgh PA 343 AM EDT Fri Jun 6 2025 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- 031-073>078-WVZ001>004-012-021-509>514-070745- 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- 343 AM EDT Fri Jun 6 2025 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. Rounds of showers and thunderstorms are expected today in the vicinity of a stationary front across the region. There is a Marginal Risk, or level 1 out of 5, for severe thunderstorms this afternoon and early evening. The main hazard is expected to be damaging wind gusts. In addition, locally heavy rainfall is also possible with the storms. This could lead to localized flash flooding, especially for areas that see multiple heavy thunderstorms. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a Marginal Risk for severe thunderstorms on Sunday with a crossing warm front, especially for areas across western Pennsylvania and northern West Virginia. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. WM
The Pittsburgh radar (KPBZ), 51 km away, was scanning. The volume nearest the first event began at 16:23 UTC.
26 flash flood. Local standard time, as filed.
State official reported flooding on PA 108 in both directions between Shiderly Lane and Old Hickory Road.
Several reports of manhole covers being blown off in the city of New Castle. Also a transit van was stuck in the middle of the road with water over the tires. Flooding is also being reported on Covert Road.
The public reported that Old Butler Road was closed due to flooding.
State official reported that Reed Road near Mount Air Road was closed due to flooding.
State official and the public reported several roads closed due to flooding, including Ellwood Road, which had 2 feet of water on the roadway.
The public reported that Sunnyside Road was completely flooded and closed both ways.
Penndot reported flooding on Mount Herman Church Road and Boak Road between Princeton Station and Frew Mill Road.
PennDOT reported flooding on Union Valley Road in both directions between Fletcher Road, Savannah Road, and Snake Run Road.
PennDOT reported flooding on PA 48 both directions between Broadway Blvd and Macbeth Dr. Also, trained spotters and the public reported flooding on several roads in Monroeville/Pitcarin including, Pitcarin Rd, Wall Ave, and Ravine St.
Emergency Management reported several roads flooded in the area of Murrysville and Export including Trafford Rd, Washington Ave, and the intersection of Route 22 and Mellon Rd. The 911 center also reported that there was an occupied vehicle trapped in water on Pleasant Valley Rd.
State official reported flooding at the intersection of PA-819 and PA-981.
Local media shared photo of a flooded intersection with Plum Creek breaching its banks.
The public reported that a vehicle was submerged on the Tri-Boro Expressway at State Street near Turtle Creek.
Local media shared a photo of flooded parking lot and street near Ginnys Pizza in Export, PA. Image shows a sedan with water up to its back bumper.
Member of the public reported Flooding on Heckman Road and 5th Street in North Versailles. An hour later, a county official reported that a house on 5th Ave was flooding with water slowly rising from the basement. Residents were unable to get out and a swift water rescue team was being dispatched.
The public reported that several roads in downtown Pittsburgh were experiencing flooding including Grant Street, Liberty Avenue, Seventh Avenue, and East Busway.
Local media reported that the roadway and parking lots are flooded at Lokay Lanes. Dry Camp Run has overflowed its banks. Debris in the roads as well.
PennDOT reported flooding on I-376 eastbound at Exit 69B.
PennDOT reported flooding on state route 51 southbound between Crane Ave and Exit ramp.
NWS Employee reported that the tunnel/ramp to get from Bigelow Blvd to the Bloomfield Bridge is flooded with about 6-10 inches of standing water. People are driving through it.
Member of the public shared a picture on social media showing a flooded road and Jacks Run breaching its banks.
Member of the public shared a photo showing State Route 130 closed in Harrison City due to being submerged in water.
Local 911 Center reported that Old Route 119 near Fosterville Road was closed due to flooding.
State official reported that Craggs Creek has overrun its banks and flooded Highway 68. The road was closed for a period of time.
County 911 center reported flooding on Franklin Avenue near Spring Street and flooding along Kennedy Boulevard.
County 911 center reported that Route 65 was temporarily closed due to flooding with vehicle stuck.
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, June 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: 1278105, 1278108, 1278115, 1278116, 1278118, 1278119, 1278120, 1278122, 1278133, 1278142, 1278125, 1278181, 1278143, 1278174, 1278144, 1278145, 1278148, 1278162, 1278161, 1278149, 1278151, 1278154, 1278157, 1278200, 1278202, 1278205.