Alert archive / Illinois / Mesoscale Discussions in 2011

Mesoscale Discussion 1097

June 5, 201118 counties in Illinois; 15 counties in Indiana; 9 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2011, 7:27 AM CDT for 18 counties in Illinois; 15 counties in Indiana; 9 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 5, 2011, 7:27 AM CDT (12:27 UTC)
Expired: Jun 5, 2011, 9:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 42 counties

Clay County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Perry County, IL, Richland County, IL, Saline 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, Harrison County, IN, Knox 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, Breckinridge County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, McLean County, KY, Meade County, KY, Ohio County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 5 km from the middle of the area, began a volume at 12:31 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, 0.5 hours before the alert went out and 226 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: 2668 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1128 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 95 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 4, 7:55 PM CDT	Mesoscale Discussion	SPC	Champaign, Christian, Clark, Coles, Crawford, Cumberland and 13 more	65 min
Jun 5, 2:52 AM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 36 more	2 hr
Jun 5, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 37 more	7 hr
Jun 4, 11:08 PM CDT	Mesoscale Discussion	SPC	Bartholomew, Brown, Clay, Greene, Jackson, Jennings and 11 more	67 min
Jun 5, 10:47 AM CDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Breckinridge, Butler, Caldwell and 28 more	88 min
Jun 5, 12:02 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Barren, Christian, Edmonson, Logan, Metcalfe and 5 more	5 hr
Jun 5, 2:55 PM CDT	Mesoscale Discussion	SPC	Allen, Barren, Christian, Logan, Lyon, Metcalfe and 5 more	65 min

Nearby

Mesoscale Discussions in Illinois, 2011 Mesoscale Discussions in Indiana, 2011 Mesoscale Discussions in Kentucky, 2011 Every mesoscale discussion in 2011

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.