Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1093

June 4, 201144 counties in Ohio; 5 counties in Pennsylvania; 16 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2011, 8:58 PM EDT for 44 counties in Ohio; 5 counties in Pennsylvania; 16 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 4, 2011, 8:58 PM EDT (00:58 UTC)
Expired: Jun 4, 2011, 11:00 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 65 counties

Ashland County, OH, Athens County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Brooke County, WV, Doddridge County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 155 km from the middle of the area, began a volume at 00:57 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 00:00Z, 1.0 hours before the alert went out and 160 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: 567 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1517 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 8:55 PM EDT	Mesoscale Discussion	SPC	Auglaize, Butler, Clark, Clinton, Darke, Greene and 8 more	65 min
Jun 5, 12:08 AM EDT	Mesoscale Discussion	SPC	Adams, Athens, Belmont, Brown, Carroll, Clermont and 27 more	67 min

Nearby

Mesoscale Discussions in Ohio, 2011 Mesoscale Discussions in West Virginia, 2011 Mesoscale Discussions in Pennsylvania, 2011 Every mesoscale discussion in 2011

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.