Alert archive / Indiana / Mesoscale Discussions in 2017

Mesoscale Discussion 1756

November 5, 201710 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Nov 5, 2017, 1:36 PM EST for 10 counties in Indiana. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Nov 5, 2017, 1:36 PM EST (18:36 UTC)
Expired: Nov 5, 2017, 2:30 PM EST
In force: 54 min
Issued by: the Storm Prediction Center

Counties Boone County, IN, Carroll County, IN, Clinton County, IN, Grant County, IN, Hamilton County, IN, Howard County, IN, Madison County, IN, Montgomery County, IN, Tippecanoe County, IN, Tipton County, IN

The radar

The Indianapolis radar (KIND), 67 km from the middle of the area, began a volume at 18:37 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

Lincoln, IL (KILX), launched 12:00Z, 6.6 hours before the alert went out and 200 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: 1199 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 382 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 5, 7:04 AM EST	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Cass, Clay, Clinton and 15 more	2 hr
Nov 5, 11:48 AM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Daviess, Dearborn, Decatur, Greene and 8 more	57 min
Nov 5, 12:08 PM EST	Tornado Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 44 more	7 hr
Nov 5, 12:09 PM EST	Mesoscale Discussion	SPC	Fountain, Vermillion, Vigo, Warren	66 min
Nov 5, 3:51 PM EST	Mesoscale Discussion	SPC	Gibson, Knox, Posey, Sullivan, Vanderburgh, Vigo and 1 more	114 min
Nov 5, 4:50 PM EST	Tornado Watch	SPC	Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick	6 hr
Nov 5, 5:58 PM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Dearborn and 28 more	62 min
Nov 5, 6:31 PM EST	Severe Thunderstorm Watch	SPC	Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 20 more	6 hr

Nearby

Mesoscale Discussions in Indiana, 2017 Every mesoscale discussion in 2017

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.