Alert archive / Pennsylvania / Mesoscale Discussions in 2016

Mesoscale Discussion 823

June 5, 20165 counties in Ohio; 8 counties in Pennsylvania; Hancock County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2016, 4:33 PM EDT for 5 counties in Ohio; 8 counties in Pennsylvania; Hancock County, West Virginia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2016, 4:33 PM EDT (20:33 UTC)
Expired: Jun 5, 2016, 6:00 PM EDT
In force: 87 min
Issued by: the Storm Prediction Center

Counties Carroll County, OH, Columbiana County, OH, Harrison County, OH, Jefferson County, OH, Mahoning County, OH, Beaver County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Hancock County, WV

The radar

The Pittsburgh radar (KPBZ), 74 km from the middle of the area, began a volume at 20:36 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, 8.6 hours before the alert went out and 87 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: 24 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 12:31 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Champaign, Clark, Coshocton and 25 more	119 min
Jun 5, 2:38 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Carroll, Columbiana, Coshocton, Cuyahoga and 15 more	4 hr
Jun 5, 1:14 PM EDT	Mesoscale Discussion	SPC	Adams, Berks, Carbon, Chester, Cumberland, Dauphin and 8 more	91 min
Jun 5, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more	6 hr
Jun 5, 4:57 PM EDT	Mesoscale Discussion	SPC	Bucks, Chester, Delaware, Montgomery, Philadelphia	93 min

Nearby

Mesoscale Discussions in Pennsylvania, 2016 Mesoscale Discussions in Ohio, 2016 Mesoscale Discussions in West Virginia, 2016 Every mesoscale discussion in 2016

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.