Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 46, NWS Pittsburgh, PA

May 28, 2010Allegheny County, Beaver County, Washington County, Pennsylvania; Jefferson County, Ohio; Brooke County, Hancock County, Ohio County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 28, 2010, 6:22 PM EDT for Allegheny County, Beaver County, Washington County, Pennsylvania; Jefferson County, Ohio; Brooke County, Hancock County, Ohio County, West Virginia. It was in force for 38 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 28, 2010, 6:22 PM EDT (22:22 UTC)
Expired: May 28, 2010, 7:00 PM EDT
In force: 38 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

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

The radar

The Pittsburgh radar (KPBZ), 26 km from the middle of the area, began a volume at 22:43 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, 10.4 hours before the alert went out and 29 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: 7 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1286 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 7:59 AM EDT	Special Weather Statement	PBZ	Venango	61 min
May 28, 3:20 PM EDT	Special Weather Statement	PBZ	Indiana	55 min
May 28, 3:50 PM EDT	Special Weather Statement	PBZ	Jefferson	40 min
May 28, 4:22 PM EDT	Special Weather Statement	PBZ	Indiana	38 min
May 28, 4:50 PM EDT	Special Weather Statement	PBZ	Lawrence, Mercer	25 min
May 28, 5:17 PM EDT	Special Weather Statement	PBZ	Lawrence	43 min
May 28, 5:34 PM EDT	Special Weather Statement	PBZ	Allegheny	41 min
May 28, 6:11 PM EDT	Special Weather Statement	PBZ	Beaver, Washington	64 min
May 27, 9:47 PM EDT	Special Weather Statement	PBZ	Guernsey	58 min
May 28, 6:23 PM EDT	Special Weather Statement	PBZ	Columbiana	52 min
May 28, 6:32 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Jefferson	43 min
May 28, 7:18 PM EDT	Special Weather Statement	PBZ	Carroll, Tuscarawas	57 min
May 28, 5:05 PM EDT	Special Weather Statement	PBZ	Tucker	40 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Severe Thunderstorm Warnings in West Virginia, 2010 Severe Thunderstorm Warnings in Ohio, 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.