Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 810

May 27, 20159 counties in Indiana; 8 counties in Michigan; 33 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 27, 2015, 3:26 PM EDT for 9 counties in Indiana; 8 counties in Michigan; 33 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 27, 2015, 3:26 PM EDT (19:26 UTC)
Expired: May 27, 2015, 5:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 50 counties

Adams County, IN, Allen County, IN, Blackford County, IN, DeKalb County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Steuben County, IN, Wells County, IN, Hillsdale County, MI, Lenawee County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Ashland County, OH, Auglaize County, OH, Champaign County, OH, Crawford County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Knox County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 144 km from the middle of the area, began a volume at 19:27 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, 7.4 hours before the alert went out and 154 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: 15 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 113 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 27, 8:57 AM EDT	Mesoscale Discussion	SPC	Boone, Brown, Clay, Clinton, Crawford, Daviess and 28 more	2 hr
May 27, 12:09 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 38 more	96 min
May 27, 1:08 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, DeKalb, Grant, Huntington and 7 more	6 hr
May 27, 1:22 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Clark, Dearborn, Decatur, Fayette, Floyd and 16 more	83 min

Nearby

Mesoscale Discussions in Ohio, 2015 Mesoscale Discussions in Indiana, 2015 Mesoscale Discussions in Michigan, 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.