A narrow warm sector along and south of a nearly stationary boundary saw showers and thunderstorms develop in the afternoon hours. Training along the boundary mostly resulted in a flash flooding threat, though moisture pooling ahead of the front supported MLCAPE values reaching 1000 J/kg, and 30-40 knots of effective shear supported some storm organization for a damaging wind and embedded…
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The episode as NWS PBZ wrote it up.
A narrow warm sector along and south of a nearly stationary boundary saw showers and thunderstorms develop in the afternoon hours. Training along the boundary mostly resulted in a flash flooding threat, though moisture pooling ahead of the front supported MLCAPE values reaching 1000 J/kg, and 30-40 knots of effective shear supported some storm organization for a damaging wind and embedded tornado threat with locally backed surface 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 Jun 22, 1:00 PM EST, 2 hours 42 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Pittsburgh PA 200 PM EDT Mon Jun 22 2026 .WHAT HAS CHANGED... Updated aviation section for 18z TAF package. Slight increase in chance for tornadoes with any severe storms this afternoon especially over northern WV and parts of southwestern PA. Uncertainty remains regarding where the axis of heaviest rainfall sets up today, but trends indicate it is likely south of Pittsburgh, potentially in northern West Virginia. && .KEY MESSAGES... 1) Rounds of showers and thunderstorms are expected today through this evening. Risks for isolated severe thunderstorms and instances of flash flooding remain. 2) Dry conditions and seasonable temperatures are expected through midweek. && .DISCUSSION... KEY MESSAGE 1... This afternoon, moisture maximizes in areas south of Pittsburgh, with precipitable water maximizing in the 1.6 to 1.8 inch range. Despite abundant cloud cover, surface-based CAPE is expected to build above 1000 J/kg southeast of a rough IDI/PIT/ZZV line (40% or greater chance on HREF progs). Expected 0-6km shear of 25-35 knots should be sufficient for storm organization into clusters/lines ahead of the advancing cold front. Damaging winds are the most likely severe threat in this scenario. Tornadoes are the secondary threat where convection could potentially take advantage of locally backed flow in the vicinity of the warm sector, most likely southeast of Pittsburgh, where the SPC Slight (level 2 of 5) Risk of severe thunderstorms exists. More isolated potential exists over the rest of the region for damaging gusts. The noted precipitable water levels suggest efficient rain- producing storms, as does decent low-level sounding saturation and warm cloud depths. Fast storm motion should help to limit the heavy rain threat to some degree unless training occurs. CAMS are also still in disagreement as to where the heaviest corridor of precipitation may set up and REFS/HREF suggesting maximum total rainfall potential of 2 to 3 inches in the worst case scenario. Such rainfall totals could cause localized flood issues. If later CAM runs focus heavy rainfall more favorably on a region (most likely target zone: northern West Virginia), then a short-fuse Flood Watch could be considered. The passage of the cold front tonight should decrease coverage of showers and storms from west to east, likely pulling out of the southeastern ridges overnight. A developing subsidence inversion will likely lock in low-level moisture, producing stratus and fog late tonight. KEY MESSAGE 2... High pressure builds in the wake of the departing low, and after a potentially dreary sunrise Tuesday, dry weather and a trend towards seasonable temperatures is expected through Wednesday. High values should reach the upper 70s to around 80 by midweek. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... Flow has decreased near track of surface low and light winds have allowed IFR stratus to persist at KDUJ and KBVI. While would expect some improvement likely to MVFR by evening, the ceilings will lower again after dark to IFR in most locations. Showers and thunderstorms will be most prevalent in the central and southern TAF sites but associated wind gusts. Severe gusts are unlikely with moist airmass but brief LIFR downpours are expected. Isolated tornadoes possible until 22-00z. Activity will decrease from west to east after 00Z as a cold front crosses. However, a developing subsidence inversion should lock in low-level moisture, producing IFR conditions in stratus and fog after sunset and continuing through the night. These restrictions should be in place through about 15Z. Outlook... VFR conditions are likely to return Tuesday by 15z after the morning stratus burns off. The next chance for widespread restrictions will be Thursday with increased precipitation potential. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && DISCUSSION...CL/Lupo AVIATION...Craven
Hazardous Weather Outlook National Weather Service Pittsburgh PA 1252 PM EDT Mon Jun 22 2026 PAZ021-029-031-073>076-WVZ004-012-021-509>514-231700- Allegheny-Washington-Greene-Westmoreland- Higher Elevations of Westmoreland-Fayette- Higher Elevations of Fayette-Marshall-Wetzel-Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 1252 PM EDT Mon Jun 22 2026 This Hazardous Weather Outlook is for southwest Pennsylvania, western Pennsylvania, and northern West Virginia. .DAY ONE...This afternoon and tonight. There is a Slight Risk (level 2 of 5) for severe thunderstorms this afternoon and evening. Damaging wind gusts are the primary threat with the chance of a tornado. Also, rounds of showers and thunderstorms may produce instances of heavy rainfall into this evening. There is the potential for isolated flooding issues, particularly in urban and poor drainage areas. A short-fuse Flood Watch may be issued later today if the threat increases. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020-022-077- 078-WVZ001>003-231700- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Armstrong-Indiana- Higher Elevations of Indiana-Hancock-Brooke-Ohio- 1252 PM EDT Mon Jun 22 2026 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 (level 1 of 5) for severe thunderstorms this afternoon and evening with wind being the main threat. Also, rounds of showers and thunderstorms may produce instances of heavy rainfall into this evening. There is the potential for isolated flooding issues, particularly in urban and poor drainage areas. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. Lupo
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
432 PM EDT Mon Jun 22 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0431 PM Flash Flood 1 E Wheeling 40.08N 80.68W
06/22/2026 Ohio WV 911 Call Center
Several roads closed due to flash flooding,
including Lynwood Ave.
&&
WMPreliminary Local Storm Report
National Weather Service Pittsburgh PA
440 PM EDT Mon Jun 22 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM Flash Flood 2 SSW West Liberty 40.14N 80.61W
06/22/2026 Ohio WV 911 Call Center
Roads closed due to flash flooding.
&&
WMPreliminary Local Storm Report
National Weather Service Pittsburgh PA
441 PM EDT Mon Jun 22 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM Flash Flood 1 WNW Wheeling 40.08N 80.72W
06/22/2026 Ohio WV Public
Route 40 closed due to flash flooding.
&&
WMThe Pittsburgh radar (KPBZ), 59 km away, was scanning. The volume nearest the first event began at 20:42 UTC.
7 thunderstorm wind, 1 tornado, 1 flash flood. Local standard time, as filed.
Tree down and large branch snapped.
Tree down across roadway on Hamer Road near Navajo Valley Road.
Tree down across the road near the intersection of Williams Road and Gillespie Road.
Tree and wires down across Layton Road near Falbo Road.
Several trees down.
NWS Storm Survey confirms an EF-1 tornado with maximum wind of 90 mph.
Trees and power lines down.
Tree down partially blocking Broadford Road at Hickory Square Road.
Member of the public reported that Wharton Furnace Road was being washed out with flooding around region.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2026Every state in 2026This day in weather historyThe tornado archive for Pennsylvania, 2026Warnings in Pennsylvania, June 2026
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: 1353538, 1353540, 1353539, 1353541, 1353542, 1353537, 1353543, 1353544, 1355830.