Alert archive / Tennessee / Mesoscale Discussions in 2004
Mesoscale Discussion 1670
The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2004, 3:44 PM CDT for 6 states. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jul 14, 2004, 3:44 PM CDT (20:44 UTC)
- Expired
- Jul 14, 2004, 5:15 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 91 counties
Colbert County, AL, DeKalb County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Morgan County, AL, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Poinsett County, AR, St. Francis County, AR, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dade County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Murray County, GA, Pickens County, GA, Walker County, GA, Whitfield County, GA, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Carroll County, TN, Chester County, TN, Coffee County, TN, Crockett County, TN, Decatur County, TN, DeKalb County, TN, Dyer County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Humphreys County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Perry County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Sequatchie County, TN, Shelby County, TN, Tipton County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN
The radar
The Northeast Alabama radar (KHTX), 76 km from the middle of the area, began a volume at 20:46 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, 8.7 hours before the alert went out and 122 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
- 1898 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
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 |
|---|---|---|---|---|
| Jul 13, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | DeKalb, Jackson, Madison | 6 hr |
| Jul 13, 10:21 PM CDT | Mesoscale Discussion | SPC | Blount, Cherokee, Cullman, DeKalb, Etowah, Jackson and 5 more | 114 min |
| Jul 14, 12:03 PM CDT | Mesoscale Discussion | SPC | Colbert, DeKalb, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 117 min |
| Jul 14, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Colbert, DeKalb, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 5 hr |
| Jul 14, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 32 more | 6 hr |
| Jul 14, 6:23 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 32 more | 97 min |
| Jul 14, 9:40 AM CDT | Severe Thunderstorm Watch | SPC | Columbia, Elbert, Franklin, Habersham, Hart, Lincoln and 4 more | 6 hr |
| Jul 13, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Boone, Buchanan, Caldwell, Carroll and 28 more | 5 hr |
| Jul 13, 11:13 PM CDT | Mesoscale Discussion | SPC | Mississippi | 2 hr |
| Jul 13, 7:36 PM CDT | Mesoscale Discussion | SPC | Anderson, Bedford, Benton, Bledsoe, Campbell, Cannon and 32 more | 114 min |
| Jul 14, 5:17 AM CDT | Mesoscale Discussion | SPC | Anderson, Clay, Cumberland, DeKalb, Fentress, Jackson and 14 more | 58 min |
| Jul 14, 7:35 AM CDT | Mesoscale Discussion | SPC | Anderson, Blount, Campbell, Cocke, Grainger, Greene and 11 more | 85 min |
Nearby
Mesoscale Discussions in Tennessee, 2004Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in Arkansas, 2004Every mesoscale discussion in 2004
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.