Alert archive / Pennsylvania / Flash Flood Warnings in 2025

Flash Flood Warning 72, NWS Pittsburgh, PA

June 18, 2025Armstrong County, Butler County, Clarion County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jun 18, 2025, 11:25 AM EDT for Armstrong County, Butler County, Clarion County, Pennsylvania. It was in force for 3 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 18, 2025, 11:25 AM EDT (15:25 UTC)
Expired: Jun 18, 2025, 2:30 PM EDT
In force: 3 hr
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Flood severity: None

Counties Armstrong County, PA, Butler County, PA, Clarion County, PA

The radar

The Pittsburgh radar (KPBZ), 72 km from the middle of the area, began a volume at 15:25 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, 3.4 hours before the alert went out and 75 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 315 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

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 18, 7:21 AM EDT, 4 hours 4 minutes earlier.

Area forecast discussion, Jun 18, 7:21 AM EDT, 4 hours 4 minutes before

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Hazardous weather outlook, Jun 18, 8:37 AM EDT, 2 hours 48 minutes before

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In the hours before

Local storm report, Jun 18, 7:24 AM EDT, 4 hours 1 minute before

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Local storm report, Jun 18, 8:00 AM EDT, 3 hours 25 minutes before

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Local storm report, Jun 18, 8:02 AM EDT, 3 hours 23 minutes before

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Local storm report, Jun 18, 8:08 AM EDT, 3 hours 17 minutes before

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        Please try again in a few minutes.
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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 9:31 AM EDT	Flash Flood Warning	PBZ	Jefferson	5 hr
Jun 18, 4:18 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence, Mercer	47 min
Jun 18, 4:44 PM EDT	Flash Flood Warning	PBZ	Forest, Venango	3 hr
Jun 18, 5:20 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	40 min
Jun 18, 5:43 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Indiana	47 min
Jun 18, 5:47 PM EDT	Flash Flood Warning	PBZ	Clarion, Forest, Jefferson, Venango	3 hr
Jun 18, 7:21 PM EDT	Flash Flood Warning	PBZ	Jefferson	86 min
Jun 18, 7:26 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	34 min
Jun 18, 7:32 PM EDT	Areal Flood Warning	PBZ	Forest, Venango	118 min
Jun 18, 7:43 PM EDT	Tornado Warning	PBZ	Beaver, Lawrence	32 min

Nearby

Flash Flood Warnings in Pennsylvania, 2025 Every 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.