Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1709

September 10, 201430 counties in Indiana; Lenawee County, Monroe County, Michigan; 23 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Sep 10, 2014, 4:08 PM EDT for 30 counties in Indiana; Lenawee County, Monroe County, Michigan; 23 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Sep 10, 2014, 4:08 PM EDT (20:08 UTC)
Expired: Sep 10, 2014, 6:15 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 55 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Brown County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Lenawee County, MI, Monroe County, MI, Allen County, OH, Auglaize County, OH, Darke County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Lucas County, OH, Mercer County, OH, Miami County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 141 km from the middle of the area, began a volume at 20:11 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 12:00Z, 8.1 hours before the alert went out and 166 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: 586 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 85 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
Sep 10, 11:34 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 44 more	116 min
Sep 10, 1:54 PM EDT	Tornado Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 51 more	9 hr
Sep 10, 2:48 PM EDT	Mesoscale Discussion	SPC	Fountain, Vermillion	117 min
Sep 10, 4:24 PM EDT	Severe Thunderstorm Watch	SPC	Benton, Cass, Fulton, Jasper, Kosciusko, Marshall and 4 more	6 hr
Sep 10, 5:36 PM EDT	Mesoscale Discussion	SPC	Posey	84 min
Sep 10, 6:11 PM EDT	Mesoscale Discussion	SPC	Clay, Delaware, Fayette, Hamilton, Hancock, Hendricks and 13 more	64 min

Nearby

Mesoscale Discussions in Indiana, 2014 Mesoscale Discussions in Ohio, 2014 Mesoscale Discussions in Michigan, 2014 Every mesoscale discussion in 2014

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.