Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1041

May 31, 201114 counties in Ohio; Crawford County, Mercer County, Venango County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at May 31, 2011, 4:07 PM EDT for 14 counties in Ohio; Crawford County, Mercer County, Venango County, Pennsylvania. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: May 31, 2011, 4:07 PM EDT (20:07 UTC)
Expired: May 31, 2011, 6:00 PM EDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Cuyahoga County, OH, Geauga County, OH, Holmes County, OH, Mahoning County, OH, Medina County, OH, Portage County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Crawford County, PA, Mercer County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 82 km from the middle of the area, began a volume at 20:04 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

Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 282 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: 1647 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 1517 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: -60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
May 31, 1:59 PM EDT	Mesoscale Discussion	SPC	Williams	3 hr
May 31, 3:33 PM EDT	Severe Thunderstorm Watch	SPC	Defiance, Fulton, Paulding, Williams	7 hr
May 31, 7:26 PM EDT	Mesoscale Discussion	SPC	Defiance, Fulton, Paulding, Williams	2 hr

Nearby

Mesoscale Discussions in Ohio, 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.