Alert archive / Pennsylvania / Flash Flood Warnings in 2025

Flash Flood Warning 6, NWS Pittsburgh, PA

May 4, 20255 counties in Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at May 4, 2025, 10:05 PM EDT for 5 counties in Pennsylvania. It was in force for 4 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: May 4, 2025, 10:05 PM EDT (02:05 UTC)
Expired: May 5, 2025, 2:00 AM EDT
In force: 4 hr
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Flood severity: None

Counties Armstrong County, PA, Butler County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 66 km from the middle of the area, began a volume at 02:07 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.

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 May 4, 9:30 PM EDT, 35 minutes earlier.

Area forecast discussion, May 4, 9:30 PM EDT, 35 minutes before

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Hazardous weather outlook, May 4, 2:20 PM EDT, 7 hours 45 minutes before

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
220 PM EDT Sun May 4 2025

OHZ040-041-050-PAZ007>009-013>016-020>022-029-031-073>078-WVZ001>003-
509>512-051830-
Carroll-Columbiana-Jefferson OH-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-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-
220 PM EDT Sun May 4 2025

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 (level 1 of 5) risk of severe thunderstorms in
this evening. Low-end risks of damaging wind, large hail, and an
isolated tornado exist. There is also a Marginal (level 1 of 4) risk
of isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a Marginal risk of strong to severe thunderstorms Monday.
Damaging winds and hail will be the primary threats, although a
tornado cannot be ruled out.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

OHZ039-048-049-057>059-068-069-WVZ004-012-021-513-514-051830-
Tuscarawas-Coshocton-Harrison-Muskingum-Guernsey-Belmont-Noble-
Monroe-Marshall-Wetzel-Marion-Western Tucker-Eastern Tucker-
220 PM EDT Sun May 4 2025

This Hazardous Weather Outlook is for east central Ohio, and
northern West Virginia.

.DAY ONE...This afternoon and tonight.

There is a Marginal (level 1 of 5) risk of severe thunderstorms in
this evening. Low-end risks of damaging wind, large hail, and an
isolated tornado exist. There is also a Marginal (level 1 of 4) risk
of isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

CL

In the hours before

Local storm report, May 4, 9:23 PM EDT, 42 minutes before

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Local storm report, May 4, 9:32 PM EDT, 33 minutes before

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Local storm report, May 4, 9:33 PM EDT, 32 minutes before

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Local storm report, May 4, 9:39 PM EDT, 26 minutes before

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Local storm report, May 4, 9:44 PM EDT, 21 minutes before

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Local storm report, May 4, 9:58 PM EDT, 7 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 8:03 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	22 min
May 4, 8:32 PM EDT	Flash Flood Warning	PBZ	Armstrong	3 hr
May 4, 8:46 PM EDT	Flash Flood Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	3 hr
May 4, 9:41 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana	25 min
May 5, 4:22 AM EDT	Dense Fog Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more	5 hr
May 5, 4:25 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	34 min
May 5, 4:34 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington, Westmoreland	17 min
May 5, 5:28 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	32 min
May 4, 8:18 PM EDT	Severe Thunderstorm Warning	PBZ	Preston, Tucker	57 min
May 4, 8:53 PM EDT	Severe Thunderstorm Warning	PBZ	Preston, Tucker	37 min
May 5, 4:34 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	Muskingum	41 min
May 5, 4:43 PM EDT	Severe Thunderstorm Warning	PBZ	Guernsey, Muskingum, Noble	28 min
May 5, 5:08 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Muskingum	52 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; radar from the NEXRAD Level II archive.