Alert archive / Ohio / Mesoscale Discussions in 2013

Mesoscale Discussion 2064

December 6, 201331 counties in Ohio; Lawrence County, Mercer County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Dec 6, 2013, 4:37 AM EST for 31 counties in Ohio; Lawrence County, Mercer County, Pennsylvania. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Dec 6, 2013, 4:37 AM EST (09:37 UTC)
Expired: Dec 6, 2013, 10:00 AM EST
In force: 5 hr
Issued by: the Storm Prediction Center

All 33 counties

Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Highland County, OH, Holmes County, OH, Knox County, OH, Licking County, OH, Madison County, OH, Mahoning County, OH, Morrow County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Portage County, OH, Ross County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Warren County, OH, Wayne County, OH, Lawrence County, PA, Mercer County, PA

The radar

The Cleveland radar (KCLE), 143 km from the middle of the area, began a volume at 09:37 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.6 hours before the alert went out and 147 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: -176 m²/s²
0-3 km storm-relative helicity: 102 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
Dec 6, 12:31 PM EST	Mesoscale Discussion	SPC	Adams, Brown, Butler, Champaign, Clark, Clermont and 17 more	4 hr
Dec 6, 4:02 PM EST	Mesoscale Discussion	SPC	Adams, Athens, Belmont, Brown, Butler, Carroll and 46 more	3 hr

Nearby

Mesoscale Discussions in Ohio, 2013 Mesoscale Discussions in Pennsylvania, 2013 Every mesoscale discussion in 2013

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.