Alert archive / Kentucky / Mesoscale Discussions in 2016

Mesoscale Discussion 1121

July 3, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2016, 1:45 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 3, 2016, 1:45 PM CDT (18:45 UTC)
Expired: Jul 3, 2016, 3:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 59 counties

Edwards County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Johnson County, IL, Lawrence County, IL, Massac County, IL, Pope County, IL, Saline County, IL, Wabash County, IL, Wayne County, IL, White 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, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Gibson County, TN, Henry County, TN, Obion County, TN, Stewart County, TN, Weakley County, TN

The radar

The Evansville,IN radar (KVWX), 85 km from the middle of the area, began a volume at 18:45 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.8 hours before the alert went out and 190 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: 93 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 3, 2:24 PM CDT	Tornado Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 12 more	8 hr
Jul 3, 5:23 PM CDT	Mesoscale Discussion	SPC	Alexander, Clay, Crawford, Edwards, Franklin, Gallatin and 19 more	97 min
Jul 3, 2:51 PM CDT	Tornado Watch	SPC	Adair, Allen, Barren, Boyle, Casey, Clinton and 20 more	7 hr

Nearby

Mesoscale Discussions in Kentucky, 2016 Mesoscale Discussions in Indiana, 2016 Mesoscale Discussions in Illinois, 2016 Every mesoscale discussion in 2016

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.