Alert archive / Pennsylvania / Flash Flood Warnings in 2025
Flash Flood Warning 64, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 17, 2025, 12:50 PM EDT for Allegheny County, Butler County, Pennsylvania. It was in force for 5 hr. 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 17, 2025, 12:50 PM EDT (16:50 UTC)
- Expired
- Jun 17, 2025, 6:00 PM EDT
- In force
- 5 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegheny County, PA, Butler County, PA
The radar
The Pittsburgh radar (KPBZ), 29 km from the middle of the area, began a volume at 16:51 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 12:00Z, 4.8 hours before the alert went out and 34 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
- 249 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 732 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 17, 11:40 AM EDT, 1 hour 10 minutes earlier.
Area forecast discussion, Jun 17, 11:40 AM EDT, 1 hour 10 minutes before
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<link rel="stylesheet" href="index.css">
</head>
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<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
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Please try again in a few minutes.
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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 17, 3:17 AM EDT | Flood Watch | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more | 27 hr |
| Jun 17, 12:34 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 17, 1:06 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| Jun 17, 2:17 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson, Westmoreland | 7 hr |
| Jun 17, 5:44 PM EDT | Flash Flood Warning | PBZ | Clarion, Forest, Mercer, Venango | 3 hr |
| Jun 17, 5:52 PM EDT | Tornado Warning | PBZ | Armstrong, Clarion | 23 min |
| Jun 17, 6:09 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 17, 7:13 PM EDT | Flash Flood Warning | PBZ | Armstrong, Clarion, Forest, Indiana, Jefferson | 2 hr |
| Jun 17, 7:30 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2025Every flash flood warning in 2025
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.