Alert archive / Indiana / Mesoscale Discussions in 2015

Mesoscale Discussion 2038

December 23, 201513 counties in Illinois; 37 counties in Indiana; 6 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 12:06 PM CST for 13 counties in Illinois; 37 counties in Indiana; 6 counties in Kentucky. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Dec 23, 2015, 12:06 PM CST (18:06 UTC)
Expired: Dec 23, 2015, 1:30 PM CST
In force: 84 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 56 counties

Clay County, IL, Crawford County, IL, Edwards County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jasper County, IL, Lawrence County, IL, Richland County, IL, Saline County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Hancock County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Vigo County, IN, Warrick County, IN, Washington County, IN, Crittenden County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 39 km from the middle of the area, began a volume at 18:08 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 560Dec 23, 12:25 PM CST

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.1 hours before the alert went out and 204 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: 12 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 465 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 212 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
Dec 23, 6:13 AM CST	Mesoscale Discussion	SPC	Alexander, Bond, Clinton, Franklin, Gallatin, Hamilton and 17 more	2 hr
Dec 23, 9:05 AM CST	Mesoscale Discussion	SPC	Alexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 20 more	85 min
Dec 23, 9:13 AM CST	Tornado Watch	SPC	Alexander, Bond, Champaign, Christian, Clark, Clay and 38 more	8 hr
Dec 23, 9:41 AM CST	Mesoscale Discussion	SPC	Cook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more	2 hr
Dec 23, 10:29 AM CST	Mesoscale Discussion	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more	91 min
Dec 23, 12:42 PM CST	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Calhoun, Cass, Fulton and 25 more	2 hr
Dec 23, 1:55 PM CST	Tornado Watch	SPC	Adams, Brown, Bureau, Calhoun, Cass, Fulton and 24 more	4 hr
Dec 23, 3:24 PM CST	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Calhoun, Cass, Fulton and 26 more	96 min
Dec 23, 12:28 PM CST	Tornado Watch	SPC	Bartholomew, Boone, Brown, Carroll, Clark, Clay and 51 more	8 hr
Dec 23, 1:55 PM CST	Mesoscale Discussion	SPC	Allen, DeKalb, Elkhart, Huntington, Kosciusko, LaGrange and 4 more	95 min
Dec 23, 2:16 PM CST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 34 more	59 min
Dec 23, 4:59 PM CST	Mesoscale Discussion	SPC	Clark, Crawford, Dubois, Floyd, Harrison, Orange and 4 more	2 hr
Dec 23, 2:49 PM CST	Mesoscale Discussion	SPC	Calloway	86 min
Dec 23, 3:17 PM CST	Severe Thunderstorm Watch	SPC	Boone, Bracken, Campbell, Gallatin, Grant, Kenton and 5 more	7 hr

Nearby

Mesoscale Discussions in Indiana, 2015 Mesoscale Discussions in Illinois, 2015 Mesoscale Discussions in Kentucky, 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.