Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 654

April 28, 201128 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2011, 3:19 AM EDT for 28 counties in Ohio. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Apr 28, 2011, 3:19 AM EDT (07:19 UTC)
Expired: Apr 28, 2011, 4:15 AM EDT
In force: 56 min
Issued by: the Storm Prediction Center

All 28 counties

Ashland County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Muskingum County, OH, Noble County, OH, Portage County, OH, Richland County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH

The radar

The Cleveland radar (KCLE), 63 km from the middle of the area, began a volume at 07:22 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, 7.3 hours before the alert went out and 155 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: 38 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1277 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 134 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
Apr 27, 9:22 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Auglaize, Brown, Butler, Champaign and 37 more	53 min
Apr 28, 12:51 AM EDT	Mesoscale Discussion	SPC	Allen, Fulton, Hancock, Henry, Lucas, Putnam and 1 more	54 min
Apr 28, 1:38 PM EDT	Mesoscale Discussion	SPC	Brown, Butler, Clermont, Hamilton, Montgomery, Preble and 1 more	97 min

Nearby

Mesoscale Discussions in Ohio, 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.