Alert archive / Tennessee / Tornado Watches in 2011
Tornado Watch 16
The Storm Prediction Center issued this tornado watch at Feb 24, 2011, 7:41 PM CST for 23 counties in Kentucky; 39 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2011, 7:41 PM CST (01:41 UTC)
- Expired
- Feb 25, 2011, 12:32 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 65 kt
All 62 counties
Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hart County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, Metcalfe County, KY, Monroe County, KY, Ohio County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Warren County, KY, Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall 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, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 52 km from the middle of the area, began a volume at 01:43 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
47 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 8:24 PM CST | Severe Thunderstorm Warning | OHX | Benton, Houston, Humphreys, Stewart | 36 min |
| Feb 24, 8:28 PM CST | Severe Thunderstorm Warning | LMK | Butler, Logan, Ohio | 32 min |
| Feb 24, 8:30 PM CST | Tornado Warning | OHX | Perry | 30 min |
| Feb 24, 8:30 PM CST | Tornado Warning | OHX | Benton, Houston, Humphreys, Stewart | 30 min |
| Feb 24, 8:51 PM CST | Severe Thunderstorm Warning | LMK | Butler, Edmonson, Grayson, Warren | 24 min |
| Feb 24, 8:54 PM CST | Tornado Warning | OHX | Hickman | 36 min |
| Feb 24, 8:58 PM CST | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more | 63 min |
| Feb 24, 9:00 PM CST | Severe Thunderstorm Warning | OHX | Lewis, Wayne | 45 min |
| Feb 24, 9:00 PM CST | Tornado Warning | OHX | Cheatham, Dickson, Houston, Humphreys, Montgomery | 30 min |
| Feb 24, 9:12 PM CST | Tornado Warning | OHX | Dickson, Humphreys | 33 min |
| Feb 24, 9:13 PM CST | Severe Thunderstorm Warning | LMK | Butler, Edmonson, Logan, Warren | 32 min |
| Feb 24, 9:14 PM CST | Severe Thunderstorm Warning | LMK | Breckinridge, Edmonson, Grayson, Hardin, Hart | 31 min |
| Feb 24, 9:20 PM CST | Severe Thunderstorm Warning | LMK | Logan, Simpson, Warren | 25 min |
| Feb 24, 9:20 PM CST | Tornado Warning | OHX | Montgomery, Robertson, Sumner | 25 min |
| Feb 24, 9:26 PM CST | Severe Thunderstorm Warning | OHX | Maury, Williamson | 34 min |
| Feb 24, 9:30 PM CST | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Macon, Montgomery, Robertson and 3 more | 60 min |
| Feb 24, 9:34 PM CST | Tornado Warning | OHX | Cheatham, Davidson, Williamson | 26 min |
| Feb 24, 9:41 PM CST | Severe Thunderstorm Warning | LMK | Allen, Logan, Simpson, Warren | 34 min |
| Feb 24, 9:45 PM CST | Severe Thunderstorm Warning | LMK | Barren, Edmonson, Hardin, Hart, Larue | 30 min |
| Feb 24, 9:46 PM CST | Severe Thunderstorm Warning | OHX | Bedford, Marshall, Maury, Rutherford, Williamson | 59 min |
| Feb 24, 9:47 PM CST | Flash Flood Warning | LMK | Allen, Barren, Butler, Edmonson, Grayson, Hardin and 6 more | 3 hr |
| Feb 24, 9:58 PM CST | Tornado Warning | LMK | Larue | 17 min |
| Feb 24, 9:58 PM CST | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Lewis, Wayne | 62 min |
| Feb 24, 10:00 PM CST | Tornado Warning | LMK | Allen, Barren, Edmonson, Hart, Warren | 30 min |
| Feb 24, 10:02 PM CST | Tornado Warning | OHX | Davidson, Rutherford, Wilson | 28 min |
| Feb 24, 10:08 PM CST | Tornado Warning | OHX | Davidson, Macon, Smith, Sumner, Trousdale, Wilson | 37 min |
| Feb 24, 10:16 PM CST | Severe Thunderstorm Warning | LMK | Allen, Barren, Metcalfe, Monroe | 29 min |
| Feb 24, 10:17 PM CST | Tornado Warning | OHX | Macon, Sumner, Trousdale | 43 min |
| Feb 24, 10:22 PM CST | Severe Thunderstorm Warning | LMK | Adair, Allen, Barren, Cumberland, Green, Hart and 2 more | 23 min |
| Feb 24, 10:24 PM CST | Severe Thunderstorm Warning | LMK | Green, Larue, Marion, Taylor | 36 min |
| Feb 24, 10:26 PM CST | Severe Thunderstorm Warning | OHX | Clay, Fentress, Jackson, Macon, Overton, Pickett and 5 more | 79 min |
| Feb 24, 10:27 PM CST | Flash Flood Warning | OHX | Stewart | 3 hr |
| Feb 24, 10:36 PM CST | Tornado Warning | OHX | Clay, Jackson, Macon | 24 min |
| Feb 24, 10:37 PM CST | Severe Thunderstorm Warning | OHX | Bedford, Cannon, Coffee, Marshall, Maury, Rutherford | 23 min |
| Feb 24, 10:39 PM CST | Tornado Warning | OHX | Clay, Fentress, Jackson, Macon, Overton, Pickett and 2 more | 36 min |
| Feb 24, 10:45 PM CST | Severe Thunderstorm Warning | LMK | Adair, Casey, Clinton, Cumberland, Green, Metcalfe and 3 more | 30 min |
| Feb 24, 10:45 PM CST | Severe Thunderstorm Warning | OHX | DeKalb | 30 min |
| Feb 24, 10:57 PM CST | Flash Flood Warning | LMK | Adair, Barren, Boyle, Casey, Clinton, Cumberland and 9 more | 3 hr |
| Feb 24, 11:03 PM CST | Severe Thunderstorm Warning | LMK | Boyle, Garrard, Jessamine, Mercer | 27 min |
| Feb 24, 11:03 PM CST | Severe Thunderstorm Warning | OHX | Bedford, Cannon, Coffee, Marshall, Rutherford, Warren | 42 min |
| Feb 24, 11:14 PM CST | Severe Thunderstorm Warning | OHX | DeKalb, White | 31 min |
| Feb 24, 11:16 PM CST | Severe Thunderstorm Warning | LMK | Casey, Clinton, Cumberland, Garrard, Lincoln, Madison and 1 more | 29 min |
| Feb 24, 11:31 PM CST | Severe Thunderstorm Warning | OHX | Coffee, Grundy, Van Buren, Warren | 44 min |
| Feb 24, 11:34 PM CST | Severe Thunderstorm Warning | OHX | Cumberland | 41 min |
| Feb 24, 11:40 PM CST | Severe Thunderstorm Warning | OHX | White | 35 min |
| Feb 24, 11:40 PM CST | Severe Thunderstorm Warning | OHX | Fentress, Overton, Pickett, Putnam | 50 min |
| Feb 25, 12:07 AM CST | Severe Thunderstorm Warning | OHX | Cumberland | 23 min |
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 00:00Z, 1.7 hours before the alert went out and 65 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
- 17 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 793 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 538 m²/s²
- 0-3 km storm-relative helicity
- 629 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
755
WWUS20 KWNS 250142
SEL6
SPC WW 250142
KYZ000-TNZ000-250700-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 16
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CST THU FEB 24 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL KENTUCKY
MIDDLE TENNESSEE
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 745 PM
UNTIL 100 AM CST.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF BOWLING
GREEN KENTUCKY TO 65 MILES SOUTH OF NASHVILLE TENNESSEE. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 14...WW 15...
DISCUSSION...FAST MOVING LINE OF SEVERE THUNDERSTORMS WITH EMBEDDED
BOWS/SUPERCELLS WILL TRACK RAPIDLY EASTWARD ACROSS PORTIONS OF
CENTRAL KY AND MIDDLE TN. DAMAGING WINDS APPEAR TO BE THE MAIN
THREAT...HOWEVER ISOLATED QLCS TORNADOES WILL ALSO BE POSSIBLE IN
MOST INTENSE CIRCULATIONS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 24045.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 7:22 PM CST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Caldwell, Calloway and 32 more | 83 min |
| Feb 24, 10:59 PM CST | Severe Thunderstorm Watch | SPC | Bell, Breathitt, Clay, Harlan, Jackson, Knott and 12 more | 5 hr |
| Feb 25, 12:48 AM CST | Mesoscale Discussion | SPC | Bell, Floyd, Harlan, Johnson, Knott, Lawrence and 6 more | 27 min |
| Feb 24, 8:11 PM CST | Mesoscale Discussion | SPC | Giles, Hardin, Lawrence, Lewis, Lincoln, McNairy and 4 more | 64 min |
| Feb 24, 8:30 PM CST | Tornado Watch | SPC | Franklin, Lincoln, Moore | 6 hr |
| Feb 24, 10:38 PM CST | Mesoscale Discussion | SPC | Giles, Hardin, Lawrence, Lewis, Lincoln, McNairy and 4 more | 97 min |
| Feb 25, 1:35 AM CST | Mesoscale Discussion | SPC | Blount, Monroe, Polk | 55 min |
Nearby
Tornado Watches in Tennessee, 2011Tornado Watches in Kentucky, 2011Every tornado watch in 2011
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.