Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1349

July 9, 201510 counties in Illinois; 14 counties in Kentucky; 9 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2015, 6:10 PM CDT for 10 counties in Illinois; 14 counties in Kentucky; 9 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 9, 2015, 6:10 PM CDT (23:10 UTC)
Expired: Jul 9, 2015, 8:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 33 counties

Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 43 km from the middle of the area, began a volume at 23:09 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

Little Rock, AR (KBYH), launched 12:00Z, 11.2 hours before the alert went out and 254 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: 643 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: -65 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
Jul 8, 9:01 PM CDT	Mesoscale Discussion	SPC	Alexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 19 more	89 min
Jul 8, 11:40 PM CDT	Mesoscale Discussion	SPC	Breckinridge, Butler, Caldwell, Calloway, Christian, Crittenden and 19 more	65 min
Jul 9, 4:11 AM CDT	Mesoscale Discussion	SPC	Adair, Barren, Boyle, Butler, Casey, Christian and 19 more	3 hr
Jul 9, 11:15 AM CDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Bell, Boyle, Breathitt and 37 more	3 hr
Jul 9, 4:58 PM CDT	Mesoscale Discussion	SPC	Breathitt, Clay, Floyd, Harlan, Jackson, Knott and 9 more	2 hr
Jul 8, 7:00 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	2 hr
Jul 9, 3:26 PM CDT	Mesoscale Discussion	SPC	Barry, Bollinger, Butler, Carter, Christian, Douglas and 14 more	2 hr

Nearby

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