Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1875

October 13, 201429 counties in Indiana; 14 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Oct 13, 2014, 3:54 PM EDT for 29 counties in Indiana; 14 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 13, 2014, 3:54 PM EDT (19:54 UTC)
Expired: Oct 13, 2014, 6:00 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 43 counties

Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Harrison County, IN, Hendricks County, IN, Jackson County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Perry County, IN, Pike County, IN, Putnam County, IN, Scott County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Butler County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Warren County, KY

The radar

The Louisville radar (KLVX), 75 km from the middle of the area, began a volume at 19:59 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 541Oct 13, 4:55 PM EDT

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 228 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: 830 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 305 m²/s²
0-3 km storm-relative helicity: 400 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
Oct 13, 9:05 AM EDT	Mesoscale Discussion	SPC	Gibson, Posey, Vanderburgh	115 min
Oct 13, 3:24 PM EDT	Tornado Watch	SPC	Benton, Jasper, Lake, Newton, Porter	7 hr
Oct 13, 4:54 PM EDT	Tornado Watch	SPC	Bartholomew, Boone, Brown, Carroll, Clark, Clay and 47 more	8 hr
Oct 13, 6:47 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clark, Clay, Clinton and 40 more	88 min
Oct 13, 11:29 AM EDT	Tornado Watch	SPC	Ballard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 7 more	8 hr
Oct 13, 4:19 PM EDT	Mesoscale Discussion	SPC	Ballard, Caldwell, Calloway, Carlisle, Crittenden, Graves and 5 more	86 min

Nearby

Mesoscale Discussions in Indiana, 2014 Mesoscale Discussions in Kentucky, 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.