Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 2418
The Storm Prediction Center issued this mesoscale discussion at Sep 27, 2003, 2:12 AM CDT for 27 counties in Kentucky; 33 counties in Tennessee. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2003, 2:12 AM CDT (07:12 UTC)
- Expired
- Sep 27, 2003, 3:45 AM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 60 counties
Adair County, KY, Allen County, KY, Barren County, KY, Butler County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hart County, KY, Larue County, KY, Logan County, KY, Marion County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Wayne County, KY, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Clay County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 61 km from the middle of the area, began a volume at 07:16 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.2 hours before the alert went out and 379 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
- 780 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 368 m²/s²
- 0-3 km storm-relative helicity
- 432 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 26, 7:56 PM CDT | Mesoscale Discussion | SPC | Boone, Henderson | 94 min |
| Sep 26, 8:20 PM CDT | Tornado Watch | SPC | Boone, Campbell, Carroll, Gallatin, Henderson, Kenton and 3 more | 6 hr |
| Sep 26, 11:06 PM CDT | Mesoscale Discussion | SPC | Boone, Campbell, Carroll, Gallatin, Grant, Henderson and 6 more | 84 min |
| Sep 26, 11:40 PM CDT | Tornado Watch | SPC | Anderson, Bath, Boone, Bourbon, Bracken, Bullitt and 35 more | 5 hr |
| Sep 27, 2:37 AM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Bourbon, Bracken, Bullitt, Campbell and 36 more | 113 min |
| Sep 27, 4:15 AM CDT | Mesoscale Discussion | SPC | Bath, Bourbon, Carter, Clark, Elliott, Estill and 18 more | 60 min |
| Sep 27, 10:42 AM CDT | Mesoscale Discussion | SPC | Bell, Harlan, Knox, Leslie, Letcher | 108 min |
| Sep 27, 1:41 PM CDT | Mesoscale Discussion | SPC | Carter, Johnson, Unicoi | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Every mesoscale discussion in 2003
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.