Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 20, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 25, 2026, 10:45 PM EDT for Allegheny County, Westmoreland County, Pennsylvania. It was in force for 72 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 25, 2026, 10:45 PM EDT (02:45 UTC)
- Expired
- Jun 25, 2026, 11:57 PM EDT
- In force
- 72 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegheny County, PA, Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 45 km from the middle of the area, began a volume at 02:46 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 2.8 hours before the alert went out and 32 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 338 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1024 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.9
What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Jun 25, 7:17 PM EDT, 3 hours 28 minutes earlier.
Area forecast discussion, Jun 25, 7:17 PM EDT, 3 hours 28 minutes before
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</html>Hazardous weather outlook, Jun 25, 1:02 PM EDT, 9 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Pittsburgh PA 102 PM EDT Thu Jun 25 2026 OHZ039>041-048>050-057>059-068-PAZ007>009-013>016-020>022-029-073- 074-077-078-WVZ001>003-261200- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Mercer-Venango-Forest-Lawrence- Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong-Washington- Westmoreland-Higher Elevations of Westmoreland-Indiana- Higher Elevations of Indiana-Hancock-Brooke-Ohio- 102 PM EDT Thu Jun 25 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 slight risk of severe thunderstorms this afternoon and evening with the threats for large hail and damaging wind gusts. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a marginal risk of excessive rainfall for much of the area, with the most likely area being along and south of I-70 Friday night into Saturday. Heat will begin to build in the lowlands by Tuesday and Wednesday with Highs in the lower 90s and heat indices of 100 to 105 possible. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. OHZ069-PAZ031-075-076-WVZ004-012-021-509>514-261200- Monroe-Greene-Fayette-Higher Elevations of Fayette-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 102 PM EDT Thu Jun 25 2026 This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, and northern West Virginia. .DAY ONE...This afternoon and tonight. While thunderstorms are possible tonight, the severe weather threat is expected to remain north of the area. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a marginal risk of excessive rainfall Friday night into Saturday with local amounts of 2 to 3 inches and flash flooding possible. Heat will begin to build in the lowlands by Tuesday and Wednesday with Highs in the lower 90s and heat indices of 100 to 105 possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. Craven
In the hours before
Local storm report, Jun 25, 6:22 PM EDT, 4 hours 23 minutes before
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</html>Local storm report, Jun 25, 6:24 PM EDT, 4 hours 21 minutes before
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</html>Local storm report, Jun 25, 6:32 PM EDT, 4 hours 13 minutes before
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</html>Local storm report, Jun 25, 6:35 PM EDT, 4 hours 10 minutes before
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</html>Local storm report, Jun 25, 6:36 PM EDT, 4 hours 9 minutes before
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</html>Local storm report, Jun 25, 6:45 PM EDT, 4 hours before
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</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 1:03 PM EDT | Flood Watch | PBZ | Greene | 23 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.