Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 408
The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2003, 9:19 AM CDT for Limestone County, Madison County, Alabama; 12 counties in Kentucky; 24 counties in Tennessee. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Apr 6, 2003, 9:19 AM CDT (14:19 UTC)
- Expired
- Apr 6, 2003, 11:15 AM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 38 counties
Limestone County, AL, Madison County, AL, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Todd County, KY, Trigg County, KY, Bedford County, TN, Benton County, TN, Carroll County, TN, Cheatham County, TN, Davidson County, TN, Dickson County, TN, Giles County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Stewart County, TN, Weakley County, TN, Williamson County, TN
The radar
The Nashville radar (KOHX), 105 km from the middle of the area, began a volume at 14:21 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, 2.3 hours before the alert went out and 97 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
- 1528 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 6, 12:40 PM CDT | Mesoscale Discussion | SPC | Greene, Hale, Marengo, Perry, Pickens, Sumter and 1 more | 2 hr |
| Apr 6, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | Lauderdale | 6 hr |
| Apr 6, 1:35 PM CDT | Tornado Watch | SPC | Bibb, Butler, Chilton, Choctaw, Clarke, Dallas and 8 more | 5 hr |
| Apr 6, 2:56 PM CDT | Mesoscale Discussion | SPC | Bibb, Chilton, Dallas, Greene, Hale, Perry and 4 more | 2 hr |
| Apr 6, 6:23 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Choctaw, Cullman, Fayette, Franklin and 14 more | 97 min |
| Apr 6, 6:50 PM CDT | Tornado Watch | SPC | Autauga, Bibb, Chilton, Choctaw, Cullman, Dallas and 12 more | 6 hr |
| Apr 6, 11:05 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 11 more | 5 hr |
| Apr 6, 12:27 PM CDT | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Gibson, Hardeman, Haywood and 4 more | 2 hr |
| Apr 6, 1:07 PM CDT | Mesoscale Discussion | SPC | Bedford, Bledsoe, Bradley, Cannon, Cheatham, Coffee and 33 more | 113 min |
| Apr 6, 3:02 PM CDT | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, DeKalb and 18 more | 118 min |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Alabama, 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.