Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 861
The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 9:13 AM CDT for Limestone County, Alabama; 18 counties in Kentucky; 63 counties in Tennessee. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2017, 9:13 AM CDT (14:13 UTC)
- Expired
- May 27, 2017, 10:45 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 82 counties
Limestone County, AL, Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Clinton County, KY, Cumberland County, KY, Knox County, KY, Logan County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Pulaski County, KY, Russell County, KY, Simpson County, KY, Todd County, KY, Warren County, KY, Wayne County, KY, Whitley County, KY, Anderson County, TN, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Montgomery County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 11 km from the middle of the area, began a volume at 14:16 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
Nashville Metro, TN (KBNA), launched 12:00Z, 2.2 hours before the alert went out and 9 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
- 825 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1026 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 |
|---|---|---|---|---|
| May 27, 3:54 AM CDT | Mesoscale Discussion | SPC | Fulton | 2 hr |
| May 27, 4:19 AM CDT | Severe Thunderstorm Watch | SPC | Fulton | 6 hr |
| May 27, 6:12 AM CDT | Mesoscale Discussion | SPC | Fulton | 2 hr |
| May 27, 12:50 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 88 more | 85 min |
| May 27, 1:16 PM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 59 min |
| May 27, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Ballard, Barren, Bourbon and 65 more | 7 hr |
| May 27, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Boone, Boyd, Bracken, Breathitt and 43 more | 6 hr |
| May 27, 3:50 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Ballard, Barren, Boyle and 53 more | 85 min |
| May 27, 5:13 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Ballard, Butler, Caldwell, Calloway, Carlisle and 22 more | 7 hr |
| May 27, 7:49 AM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 12 more | 86 min |
| May 27, 5:11 PM CDT | Mesoscale Discussion | SPC | Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 16 more | 64 min |
| May 27, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 9 hr |
Nearby
Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Kentucky, 2017Mesoscale Discussions in Alabama, 2017Every mesoscale discussion in 2017
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.