Alert archive / Pennsylvania / Flash Flood Warnings in 2026

Flash Flood Warning 23, NWS Pittsburgh, PA

July 4, 2026Fayette County, Washington County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jul 4, 2026, 6:32 PM EDT for Fayette County, Washington County, Westmoreland 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: Jul 4, 2026, 6:32 PM EDT (22:32 UTC)
Expired: Jul 4, 2026, 9:30 PM EDT
In force: 3 hr
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Flood severity: None

Counties Fayette County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 57 km from the middle of the area, began a volume at 22:33 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, 10.5 hours before the alert went out and 40 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: 528 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1496 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 4, 1:45 PM EDT, 4 hours 47 minutes earlier.

Area forecast discussion, Jul 4, 1:45 PM EDT, 4 hours 47 minutes before

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Hazardous weather outlook, Jul 4, 1:53 AM EDT, 16 hours 39 minutes before

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In the hours before

Local storm report, Jul 4, 6:10 PM EDT, 22 minutes before

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Local storm report, Jul 4, 6:15 PM EDT, 17 minutes before

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Local storm report, Jul 4, 6:18 PM EDT, 14 minutes before

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Local storm report, Jul 4, 6:20 PM EDT, 12 minutes before

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Local storm report, Jul 4, 6:26 PM EDT, 6 minutes before

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Local storm report, Jul 4, 6:31 PM EDT, 1 minute 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
Jul 3, 8:00 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	45 min
Jul 3, 8:09 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Mercer, Venango	51 min
Jul 3, 8:37 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Indiana, Jefferson	38 min
Jul 3, 9:04 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	26 min
Jul 3, 9:09 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	22 min
Jul 3, 9:17 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	31 min
Jul 3, 9:30 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	15 min
Jul 3, 9:40 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence, Mercer	52 min
Jul 3, 9:53 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	23 min
Jul 3, 11:33 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Forest, Jefferson	42 min
Jul 4, 1:08 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	52 min
Jul 4, 1:54 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	51 min
Jul 4, 2:32 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	28 min
Jul 4, 2:50 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	28 min
Jul 4, 2:52 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	38 min
Jul 4, 3:15 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	26 min
Jul 4, 3:17 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	43 min
Jul 4, 3:25 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	50 min
Jul 4, 3:27 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	48 min
Jul 4, 3:30 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	45 min
Jul 4, 3:40 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	38 min
Jul 4, 4:10 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	46 min
Jul 4, 4:13 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	47 min
Jul 4, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	70 min
Jul 4, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	48 min
Jul 4, 4:48 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson, Venango	30 min
Jul 4, 4:50 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	32 min
Jul 4, 4:55 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	42 min
Jul 4, 5:05 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	Greene	37 min
Jul 4, 5:16 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	29 min
Jul 4, 5:27 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	Greene	23 min
Jul 4, 5:41 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PBZ	Greene	25 min
Jul 4, 5:42 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Indiana, Westmoreland	48 min
Jul 4, 5:44 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	33 min
Jul 4, 6:02 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	43 min
Jul 4, 6:20 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington, Westmoreland	55 min
Jul 4, 7:01 PM EDT	Flash Flood Warning	PBZ	Westmoreland	3 hr
Jul 3, 10:53 PM EDT	Severe Thunderstorm Warning	PBZ	Harrison, Jefferson	26 min
Jul 4, 2:16 PM EDT	Severe Thunderstorm Warning	PBZ	Columbiana	44 min
Jul 4, 2:31 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Tuscarawas	36 min
Jul 4, 3:58 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Harrison, Jefferson	21 min
Jul 4, 4:53 PM EDT	Severe Thunderstorm Warning	PBZ	Monroe	39 min
Jul 4, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Harrison, Jefferson	39 min
Jul 4, 6:38 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Noble	38 min
Jul 4, 2:15 PM EDT	Severe Thunderstorm Warning	PBZ	Preston	38 min
Jul 4, 4:13 PM EDT	Severe Thunderstorm Warning	PBZ	Tucker	37 min

Nearby

Flash Flood Warnings in Pennsylvania, 2026 Every 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.