Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 184, NWS Pittsburgh, PA

October 2, 2018Allegheny County, Beaver County, Washington County, Pennsylvania; Jefferson County, Ohio; Brooke County, Hancock County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Oct 2, 2018, 2:45 PM EDT for Allegheny County, Beaver County, Washington County, Pennsylvania; Jefferson County, Ohio; Brooke County, Hancock County, West Virginia. It was in force for 45 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: Oct 2, 2018, 2:45 PM EDT (18:45 UTC)
Expired: Oct 2, 2018, 3:30 PM EDT
In force: 45 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jefferson County, OH, Allegheny County, PA, Beaver County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV

The radar

The Pittsburgh radar (KPBZ), 21 km from the middle of the area, began a volume at 18:45 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 (KAGC), launched 12:00Z, 6.8 hours before the alert went out and 27 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: 779 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.7

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 Oct 2, 1:53 PM EDT, 52 minutes earlier.

Area forecast discussion, Oct 2, 1:53 PM EDT, 52 minutes before

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Hazardous weather outlook, Oct 2, 1:11 PM EDT, 1 hour 34 minutes before

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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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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
Oct 2, 4:10 AM EDT	Special Weather Statement	PBZ	Venango	35 min
Oct 2, 4:42 AM EDT	Special Weather Statement	PBZ	Forest	33 min
Oct 2, 3:28 PM EDT	Special Weather Statement	PBZ	Allegheny	32 min
Oct 2, 4:02 PM EDT	Special Weather Statement	PBZ	Venango	28 min
Oct 2, 4:12 PM EDT	Tornado Warning	PBZ	Venango	33 min
Oct 2, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	13 min
Oct 2, 4:17 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Jefferson	28 min
Oct 2, 4:25 PM EDT	Special Weather Statement	PBZ	Allegheny	35 min
Oct 2, 4:33 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	42 min
Oct 2, 4:42 PM EDT	Special Weather Statement	PBZ	Westmoreland	33 min
Oct 2, 4:44 PM EDT	Special Weather Statement	PBZ	Jefferson	31 min
Oct 2, 4:47 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	43 min
Oct 2, 4:54 PM EDT	Tornado Warning	PBZ	Forest	36 min
Oct 2, 5:03 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	42 min
Oct 2, 5:05 PM EDT	Special Weather Statement	PBZ	Mercer	25 min
Oct 2, 5:07 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	38 min
Oct 2, 5:10 PM EDT	Tornado Warning	PBZ	Greene, Washington	35 min
Oct 2, 5:19 PM EDT	Tornado Warning	PBZ	Jefferson	26 min
Oct 2, 5:23 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	52 min
Oct 2, 5:26 PM EDT	Severe Thunderstorm Warning	PBZ	Forest	34 min
Oct 2, 5:29 PM EDT	Areal Flood Advisory	PBZ	Forest	2 hr
Oct 2, 5:31 PM EDT	Special Weather Statement	PBZ	Venango	29 min
Oct 2, 5:36 PM EDT	Tornado Warning	PBZ	Jefferson	24 min
Oct 2, 5:39 PM EDT	Tornado Warning	PBZ	Fayette, Greene	36 min
Oct 2, 5:44 PM EDT	Special Weather Statement	PBZ	Mercer	31 min
Oct 2, 5:48 PM EDT	Tornado Warning	PBZ	Westmoreland	27 min
Oct 2, 5:49 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	26 min
Oct 2, 5:58 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	47 min
Oct 2, 5:59 PM EDT	Tornado Warning Tornado observed	PBZ	Jefferson	16 min
Oct 2, 6:02 PM EDT	Tornado Warning	PBZ	Fayette, Greene	28 min
Oct 2, 6:03 PM EDT	Special Weather Statement	PBZ	Forest	57 min
Oct 2, 6:10 PM EDT	Tornado Warning	PBZ	Westmoreland	24 min
Oct 2, 6:18 PM EDT	Tornado Warning	PBZ	Jefferson	27 min
Oct 2, 6:24 PM EDT	Special Weather Statement	PBZ	Mercer	36 min
Oct 2, 7:24 PM EDT	Tornado Warning	PBZ	Armstrong, Clarion	20 min
Oct 2, 4:34 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton	41 min
Oct 2, 5:04 PM EDT	Severe Thunderstorm Warning	PBZ	Tuscarawas	41 min
Oct 2, 5:31 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Guernsey, Tuscarawas	44 min
Oct 2, 5:44 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Harrison, Tuscarawas	46 min
Oct 2, 5:53 PM EDT	Special Weather Statement	PBZ	Columbiana	37 min
Oct 2, 6:07 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Harrison, Tuscarawas	38 min
Oct 2, 6:29 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Guernsey, Tuscarawas	46 min
Oct 2, 6:32 PM EDT	Severe Thunderstorm Warning	PBZ	Muskingum	43 min
Oct 2, 6:42 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey	48 min
Oct 2, 6:51 PM EDT	Special Weather Statement	PBZ	Guernsey	24 min
Oct 2, 6:59 PM EDT	Special Weather Statement	PBZ	Harrison	31 min
Oct 2, 7:10 PM EDT	Severe Thunderstorm Warning	PBZ	Guernsey, Muskingum	39 min
Oct 2, 7:10 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Harrison	38 min
Oct 2, 7:12 PM EDT	Tornado Warning	PBZ	Preston	33 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2018 Severe Thunderstorm Warnings in West Virginia, 2018 Severe Thunderstorm Warnings in Ohio, 2018 Every severe thunderstorm warning in 2018

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.