Alert archive / Tennessee / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 24
The Storm Prediction Center issued this severe thunderstorm watch at Feb 21, 2005, 8:40 AM CST for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 21, 2005, 8:40 AM CST (14:40 UTC)
- Expired
- Feb 21, 2005, 2:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 64 counties
Colbert County, AL, Cullman County, AL, DeKalb County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Catoosa County, GA, Dade County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA, McCreary County, KY, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hickman County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Northeast Alabama radar (KHTX), 60 km from the middle of the area, began a volume at 14:41 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.
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 8:43 AM CST | Flash Flood Warning | OHX | Giles, Lawrence, Wayne | 2 hr |
| Feb 21, 9:22 AM CST | Severe Thunderstorm Warning | OHX | Putnam, Warren, White | 38 min |
| Feb 21, 10:29 AM CST | Severe Thunderstorm Warning | MRX | Bradley, Loudon, McMinn, Monroe | 46 min |
| Feb 21, 10:47 AM CST | Severe Thunderstorm Warning | FFC | Catoosa, Walker | 43 min |
| Feb 21, 10:53 AM CST | Severe Thunderstorm Warning | MRX | Blount, Monroe, Polk | 37 min |
| Feb 21, 12:01 PM CST | Flash Flood Warning | OHX | Lawrence, Wayne | 119 min |
| Feb 21, 12:40 PM CST | Flash Flood Warning | HUN | Lauderdale | 3 hr |
| Feb 21, 12:45 PM CST | Flash Flood Warning | OHX | Giles | 3 hr |
| Feb 21, 1:40 PM CST | Flash Flood Warning | HUN | Lincoln | 2 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 2.7 hours before the alert went out and 87 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
- 65 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 1002 m above ground
- 0-6 km bulk shear
- 94 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 7:50 AM CST | Mesoscale Discussion | SPC | Lauderdale | 55 min |
| Feb 21, 10:52 AM CST | Mesoscale Discussion | SPC | Blount, Cherokee, DeKalb, Etowah, Marshall | 113 min |
| Feb 21, 12:17 PM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 12 more | 118 min |
| Feb 21, 12:45 PM CST | Severe Thunderstorm Watch | SPC | Blount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 17 more | 5 hr |
| Feb 21, 3:47 PM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, Cullman, DeKalb and 14 more | 118 min |
| Feb 21, 4:50 PM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Butler, Coffee, Conecuh, Covington and 8 more | 55 min |
| Feb 21, 5:48 PM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Cleburne, Cullman and 15 more | 27 min |
| Feb 21, 12:30 AM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 6 hr |
| Feb 21, 2:10 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 95 min |
| Feb 21, 3:00 AM CST | Severe Thunderstorm Watch | SPC | Bedford, Bledsoe, Cannon, Cheatham, Clay, Coffee and 29 more | 6 hr |
| Feb 21, 4:29 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 2 hr |
| Feb 21, 5:13 AM CST | Mesoscale Discussion | SPC | Bedford, Bledsoe, Cannon, Cheatham, Clay, Coffee and 30 more | 2 hr |
| Feb 21, 5:45 AM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Tennessee, 2005Severe Thunderstorm Watches in Alabama, 2005Severe Thunderstorm Watches in Georgia, 2005Every severe thunderstorm watch in 2005
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.