Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 1944
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2003, 3:14 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2003, 3:14 PM CDT (20:14 UTC)
- Expired
- Jul 21, 2003, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 100 counties
Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Murray County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Allen County, KY, Christian County, KY, Cumberland County, KY, Logan County, KY, Monroe County, KY, Muhlenberg County, KY, Simpson County, KY, Todd County, KY, Warren County, KY, Choctaw County, MS, Clay County, MS, Itawamba County, MS, Lowndes County, MS, Monroe County, MS, Oktibbeha County, MS, Bedford County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Lawrence County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Wilson County, TN
The radar
The Northeast Alabama radar (KHTX), 96 km from the middle of the area, began a volume at 20:14 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, 8.2 hours before the alert went out and 126 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
- 1467 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 1108 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 117 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 |
|---|---|---|---|---|
| Jul 21, 1:10 PM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, DeKalb, Etowah, Franklin and 9 more | 95 min |
| Jul 21, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 13 more | 5 hr |
| Jul 21, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Calhoun, Chambers, Chilton, Choctaw and 18 more | 5 hr |
| Jul 21, 5:03 AM CDT | Mesoscale Discussion | SPC | Boone, Campbell, Carroll, Gallatin, Grant, Henry and 5 more | 117 min |
| Jul 21, 5:10 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 2 more | 6 hr |
| Jul 21, 6:39 AM CDT | Mesoscale Discussion | SPC | Boyd, Bracken, Carter, Fleming, Greenup, Harrison and 5 more | 96 min |
| Jul 21, 7:03 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barren, Breckinridge, Bullitt, Butler and 31 more | 117 min |
| Jul 21, 7:40 AM CDT | Severe Thunderstorm Watch | SPC | Bath, Boyd, Carter, Elliott, Greenup, Lawrence and 3 more | 5 hr |
| Jul 21, 10:27 AM CDT | Mesoscale Discussion | SPC | Boone, Breckinridge, Bullitt, Butler, Caldwell, Carroll and 33 more | 2 hr |
| Jul 21, 11:55 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Boyle, Butler, Caldwell and 34 more | 6 hr |
| Jul 21, 1:41 PM CDT | Mesoscale Discussion | SPC | Bell, Floyd, Harlan, Knott, Leslie, Letcher and 3 more | 64 min |
| Jul 21, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 21 more | 4 hr |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Georgia, 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.