Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 208, NWS Pittsburgh, PA

July 23, 2013Fayette County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 23, 2013, 8:21 PM EDT for Fayette County, Pennsylvania. It was in force for 54 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 23, 2013, 8:21 PM EDT (00:21 UTC)
Expired: Jul 23, 2013, 9:15 PM EDT
In force: 54 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

County Fayette County, PA

The radar

The Pittsburgh radar (KPBZ), 84 km from the middle of the area, began a volume at 00:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 23, 1:54 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 0.4 hours before the alert went out and 303 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: 221 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1241 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 23, 6:48 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 23, 6:48 PM EDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jul 23, 6:54 PM EDT, 1 hour 27 minutes before

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In the hours before

Local storm report, Jul 23, 7:40 PM EDT, 41 minutes before

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Local storm report, Jul 23, 7:41 PM EDT, 40 minutes before

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Local storm report, Jul 23, 7:42 PM EDT, 39 minutes before

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Local storm report, Jul 23, 7:49 PM EDT, 32 minutes before

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Special weather statement, Jul 23, 7:54 PM EDT, 27 minutes before

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Local storm report, Jul 23, 7:57 PM EDT, 24 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 23, 9:09 PM EDT	Areal Flood Advisory	PBZ	Fayette	3 hr
Jul 23, 8:52 PM EDT	Areal Flood Advisory	PBZ	Muskingum	3 hr
Jul 23, 9:27 PM EDT	Areal Flood Advisory	PBZ	Noble	3 hr
Jul 23, 10:56 PM EDT	Areal Flood Advisory	PBZ	Columbiana	6 hr
Jul 23, 8:39 PM EDT	Special Weather Statement	PBZ	Monongalia, Preston	51 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.