Alert archive / Illinois / Mesoscale Discussions in 2015

Mesoscale Discussion 1071

June 19, 201517 counties in Illinois; 16 counties in Indiana; 6 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2015, 12:48 PM CDT for 17 counties in Illinois; 16 counties in Indiana; 6 counties in Kentucky. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2015, 12:48 PM CDT (17:48 UTC)
Expired: Jun 19, 2015, 2:45 PM CDT
In force: 117 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 39 counties

Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Massac County, IL, Pope County, IL, Richland County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Warrick County, IN, Crittenden County, KY, Daviess County, KY, Henderson County, KY, Livingston County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 27 km from the middle of the area, began a volume at 17:51 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, 5.8 hours before the alert went out and 234 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: 938 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: 1 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
Jun 19, 4:22 AM CDT	Mesoscale Discussion	SPC	Ballard, Carlisle, Fulton, Graves, Hickman, McCracken	53 min

Nearby

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