Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 1122

June 22, 201515 counties in Ohio; Crawford County, Erie County, Mercer County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2015, 6:38 PM EDT for 15 counties in Ohio; Crawford County, Erie County, Mercer County, Pennsylvania. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2015, 6:38 PM EDT (22:38 UTC)
Expired: Jun 22, 2015, 7:45 PM EDT
In force: 67 min
Issued by: the Storm Prediction Center

Counties Ashland County, OH, Ashtabula County, OH, Carroll County, OH, Columbiana County, OH, Cuyahoga County, OH, Geauga County, OH, Holmes County, OH, Lake County, OH, Mahoning County, OH, Medina County, OH, Portage County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Crawford County, PA, Erie County, PA, Mercer County, PA

The radar

The Cleveland radar (KCLE), 87 km from the middle of the area, began a volume at 22:39 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, 10.6 hours before the alert went out and 141 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: 1332 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 46 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
Jun 22, 12:00 PM EDT	Mesoscale Discussion	SPC	Williams	2 hr
Jun 22, 3:09 PM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Crawford, Defiance, Erie, Fulton and 14 more	96 min
Jun 22, 4:47 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Ashtabula, Carroll, Columbiana, Crawford, Cuyahoga and 24 more	3 hr

Nearby

Mesoscale Discussions in Ohio, 2015 Mesoscale Discussions in Pennsylvania, 2015 Every mesoscale discussion in 2015

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.