Alert archive / Kentucky / Mesoscale Discussions in 2018
Mesoscale Discussion 1109
The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2018, 7:24 PM EDT for 5 states. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2018, 7:24 PM EDT (23:24 UTC)
- Expired
- Jul 20, 2018, 9:00 PM EDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 67 counties
Bath County, KY, Bell County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clark County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lewis County, KY, Madison County, KY, Magoffin County, KY, Martin County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rockcastle County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY, Lawrence County, OH, Campbell County, TN, Claiborne County, TN, Grainger County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Sullivan County, TN, Union County, TN, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Wise County, VA, Boone County, WV, Cabell County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Putnam County, WV, Wayne County, WV, Wyoming County, WV
The radar
The Jackson,KY radar (KJKL), 40 km from the middle of the area, began a volume at 23:23 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
Roanoke, VA (KRNK), launched 12:00Z, 11.4 hours before the alert went out and 301 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 12:17 PM EDT | Mesoscale Discussion | SPC | Butler, Caldwell, Calloway, Christian, Crittenden, Daviess and 11 more | 58 min |
| Jul 20, 1:19 PM EDT | Mesoscale Discussion | SPC | Adair, Anderson, Barren, Boone, Boyle, Breckinridge and 33 more | 56 min |
| Jul 20, 1:37 PM EDT | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Boone, Bourbon and 54 more | 7 hr |
| Jul 20, 1:58 PM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 18 more | 62 min |
| Jul 20, 3:43 PM EDT | Mesoscale Discussion | SPC | Adair, Anderson, Bath, Boone, Bourbon, Boyle and 60 more | 62 min |
| Jul 20, 4:16 PM EDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 31 more | 6 hr |
| Jul 20, 6:37 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Boone, Bourbon and 57 more | 53 min |
| Jul 20, 6:54 PM EDT | Mesoscale Discussion | SPC | Allen, Barren, Butler, Caldwell, Calloway, Christian and 17 more | 3 hr |
| Jul 20, 7:22 PM EDT | Tornado Watch | SPC | Adair, Allen, Anderson, Ballard, Barren, Bourbon and 65 more | 8 hr |
| Jul 20, 3:59 PM EDT | Mesoscale Discussion | SPC | Darke, Defiance, Mercer, Paulding, Van Wert | 61 min |
| Jul 19, 9:54 PM EDT | Severe Thunderstorm Watch | SPC | Dyer, Fayette, Haywood, Lauderdale, Shelby, Tipton | 114 min |
Nearby
Mesoscale Discussions in Kentucky, 2018Mesoscale Discussions in West Virginia, 2018Mesoscale Discussions in Tennessee, 2018Every mesoscale discussion in 2018
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.