Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 52, NWS Pittsburgh, PA

May 31, 2010Indiana County, Jefferson County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 31, 2010, 5:10 PM EDT for Indiana County, Jefferson County, Pennsylvania. It was in force for 50 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: May 31, 2010, 5:10 PM EDT (21:10 UTC)
Expired: May 31, 2010, 6:00 PM EDT
In force: 50 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Indiana County, PA, Jefferson County, PA

The radar

The State College radar (KCCX), 87 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 104 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: 240 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1389 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 56 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 May 31, 3:42 PM EDT, 1 hour 28 minutes earlier.

Area forecast discussion, May 31, 3:42 PM EDT, 1 hour 28 minutes before

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Hazardous weather outlook, May 31, 3:30 PM EDT, 1 hour 40 minutes before

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In the hours before

Special weather statement, May 31, 3:21 PM EDT, 1 hour 49 minutes before

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Special weather statement, May 31, 3:37 PM EDT, 1 hour 33 minutes before

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Special weather statement, May 31, 3:54 PM EDT, 1 hour 16 minutes before

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Local storm report, May 31, 4:12 PM EDT, 58 minutes before

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Special weather statement, May 31, 4:17 PM EDT, 53 minutes before

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Special weather statement, May 31, 5:00 PM EDT, 10 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 31, 1:18 PM EDT	Special Weather Statement	PBZ	Beaver	42 min
May 31, 1:29 PM EDT	Special Weather Statement	PBZ	Forest, Mercer, Venango	46 min
May 31, 1:33 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler	27 min
May 31, 2:06 PM EDT	Special Weather Statement	PBZ	Mercer	54 min
May 31, 2:16 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	44 min
May 31, 2:23 PM EDT	Special Weather Statement	PBZ	Allegheny	52 min
May 31, 2:33 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Clarion, Mercer, Venango	57 min
May 31, 2:52 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	53 min
May 31, 3:20 PM EDT	Flash Flood Watch	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 4 more	12 hr
May 31, 3:21 PM EDT	Special Weather Statement	PBZ	Forest	54 min
May 31, 3:54 PM EDT	Special Weather Statement	PBZ	Indiana	51 min
May 31, 4:17 PM EDT	Special Weather Statement	PBZ	Forest	43 min
May 31, 5:00 PM EDT	Special Weather Statement	PBZ	Indiana	45 min
May 31, 5:15 PM EDT	Special Weather Statement	PBZ	Westmoreland	60 min
May 31, 5:21 PM EDT	Special Weather Statement	PBZ	Allegheny	54 min
May 31, 6:19 PM EDT	Special Weather Statement	PBZ	Beaver	56 min
May 31, 6:30 PM EDT	Special Weather Statement	PBZ	Allegheny	60 min
May 31, 6:58 PM EDT	Special Weather Statement	PBZ	Butler	62 min
May 31, 6:59 PM EDT	Special Weather Statement	PBZ	Butler	61 min
May 31, 7:28 PM EDT	Special Weather Statement	PBZ	Mercer	62 min
May 31, 7:55 PM EDT	Areal Flood Advisory	PBZ	Allegheny	3 hr
May 31, 9:22 AM EDT	Special Weather Statement	PBZ	Harrison	53 min
May 31, 5:25 PM EDT	Special Weather Statement	PBZ	Jefferson	65 min
May 31, 5:37 PM EDT	Special Weather Statement	PBZ	Belmont	53 min
May 31, 6:29 PM EDT	Special Weather Statement	PBZ	Belmont	61 min
May 31, 12:37 PM EDT	Special Weather Statement	PBZ	Hancock	23 min
May 31, 3:37 PM EDT	Special Weather Statement	PBZ	Preston	53 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Every severe thunderstorm warning in 2010

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.