Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 78, NWS Pittsburgh, PA

July 27, 2023Fayette County, Pennsylvania; Preston County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 27, 2023, 3:39 PM EDT for Fayette County, Pennsylvania; Preston County, West Virginia. It was in force for 31 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: Jul 27, 2023, 3:39 PM EDT (19:39 UTC)
Expired: Jul 27, 2023, 4:10 PM EDT
In force: 31 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fayette County, PA, Preston County, WV

The radar

The Pittsburgh radar (KPBZ), 105 km from the middle of the area, began a volume at 19:41 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.7 hours before the alert went out and 211 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: 590 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1387 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 127 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 severe thunderstorm 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 severe thunderstorm warning went out at Jul 27, 3:28 PM EDT, 11 minutes earlier.

Area forecast discussion, Jul 27, 3:28 PM EDT, 11 minutes before

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Hazardous weather outlook, Jul 27, 3:38 PM EDT, 1 minute before

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In the hours before

Local storm report, Jul 27, 10:39 AM EDT, 5 hours before

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Local storm report, Jul 27, 10:42 AM EDT, 4 hours 57 minutes before

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Special weather statement, Jul 27, 2:39 PM EDT, 1 hour before

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Special weather statement, Jul 27, 3:11 PM EDT, 28 minutes before

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Special weather statement, Jul 27, 3:35 PM EDT, 4 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
Jul 26, 8:15 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	45 min
Jul 26, 8:26 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	49 min
Jul 26, 8:48 PM EDT	Special Weather Statement	PBZ	Venango	27 min
Jul 26, 8:57 PM EDT	Special Weather Statement	PBZ	Butler	33 min
Jul 26, 9:04 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Clarion, Venango	41 min
Jul 26, 9:24 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	51 min
Jul 26, 10:04 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	41 min
Jul 26, 10:16 PM EDT	Flash Flood Warning	PBZ	Clarion	3 hr
Jul 26, 10:37 PM EDT	Flash Flood Warning	PBZ	Clarion	2 hr
Jul 26, 10:44 PM EDT	Flash Flood Warning	PBZ	Jefferson	2 hr
Jul 27, 2:12 AM EDT	Special Weather Statement	PBZ	Lawrence	33 min
Jul 27, 2:58 AM EDT	Special Weather Statement	PBZ	Beaver	32 min
Jul 27, 3:05 AM EDT	Heat Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 7 more	38 hr
Jul 27, 3:18 AM EDT	Special Weather Statement	PBZ	Butler, Clarion	27 min
Jul 27, 2:39 PM EDT	Special Weather Statement	PBZ	Greene	36 min
Jul 27, 3:11 PM EDT	Special Weather Statement	PBZ	Fayette	34 min
Jul 27, 3:35 PM EDT	Special Weather Statement	PBZ	Fayette	25 min
Jul 27, 3:59 PM EDT	Special Weather Statement	PBZ	Tucker	31 min
Jul 27, 4:22 PM EDT	Special Weather Statement	PBZ	Preston	23 min
Jul 27, 4:30 PM EDT	Special Weather Statement	PBZ	Tucker	30 min
Jul 27, 5:06 PM EDT	Special Weather Statement	PBZ	Marion	24 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023 Severe Thunderstorm Warnings in West Virginia, 2023 Every severe thunderstorm warning in 2023

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.