Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 11, NWS Nashville, TN

February 24, 2011Macon County, Sumner County, Trousdale County, Tennessee

NWS Nashville, TN issued this tornado warning at Feb 24, 2011, 10:17 PM CST for Macon County, Sumner County, Trousdale County, Tennessee. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 24, 2011, 10:17 PM CST (04:17 UTC)
Expired: Feb 24, 2011, 11:00 PM CST
In force: 43 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Macon County, TN, Sumner County, TN, Trousdale County, TN

The radar

The Nashville radar (KOHX), 49 km from the middle of the area, began a volume at 04:20 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 24, 7:41 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.3 hours before the alert went out and 61 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

301 
WFUS54 KOHX 250417
TOROHX
TNC111-165-169-250500-
/O.NEW.KOHX.TO.W.0011.110225T0417Z-110225T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1017 PM CST THU FEB 24 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN MACON COUNTY IN MIDDLE TENNESSEE...
  EASTERN SUMNER COUNTY IN MIDDLE TENNESSEE...
  NORTHERN TROUSDALE COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1100 PM CST

* AT 1011 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GALLATIN...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARTSVILLE...LAFAYETTE AND WESTMORELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3664 8610 3664 8602 3642 8591 3643 8598
      3641 8598 3633 8646 3648 8652 3665 8617
      3665 8611
TIME...MOT...LOC 0417Z 254DEG 34KT 3643 8636

$$

BOYD

2 follow-up statements

745 
WWUS54 KOHX 250436
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1036 PM CST THU FEB 24 2011

TNC165-250446-
/O.CAN.KOHX.TO.W.0011.000000T0000Z-110225T0500Z/
SUMNER TN-
1036 PM CST THU FEB 24 2011

...THE TORNADO WARNING FOR EASTERN SUMNER COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3664 8602 3642 8591 3643 8598 3641 8598
      3639 8619 3649 8622 3652 8621 3653 8622
      3656 8622 3665 8617
TIME...MOT...LOC 0436Z 254DEG 34KT 3648 8614

$$

TNC111-169-250500-
/O.CON.KOHX.TO.W.0011.000000T0000Z-110225T0500Z/
TROUSDALE TN-MACON TN-
1036 PM CST THU FEB 24 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN MACON AND
NORTHEASTERN TROUSDALE COUNTIES UNTIL 1100 PM CST...

AT 1033 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES NORTH OF HARTSVILLE...MOVING EAST AT 40
MPH.

LOCATIONS IMPACTED INCLUDE...
  LAFAYETTE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3664 8602 3642 8591 3643 8598 3641 8598
      3639 8619 3649 8622 3652 8621 3653 8622
      3656 8622 3665 8617
TIME...MOT...LOC 0436Z 254DEG 34KT 3648 8614

$$

LAROSA

934 
WWUS54 KOHX 250456
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1056 PM CST THU FEB 24 2011

TNC111-169-250506-
/O.EXP.KOHX.TO.W.0011.000000T0000Z-110225T0500Z/
TROUSDALE TN-MACON TN-
1056 PM CST THU FEB 24 2011

...THE TORNADO WARNING FOR WESTERN MACON AND NORTHEASTERN TROUSDALE
COUNTIES WILL EXPIRE AT 1100 PM CST...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 3664 8602 3642 8591 3643 8598 3641 8598
      3639 8619 3649 8622 3652 8621 3653 8622
      3656 8622 3665 8617
TIME...MOT...LOC 0456Z 254DEG 34KT 3653 8591

$$

LAROSA

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 7:22 PM CST	Tornado Warning	OHX	Stewart	24 min
Feb 24, 8:24 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Stewart	36 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, 8:54 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, 9:20 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, 9:46 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	59 min
Feb 24, 9:58 PM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Wayne	62 min
Feb 24, 10:02 PM CST	Tornado Warning Emergency	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, 10:26 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	OHX	DeKalb	30 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, 11:31 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
Feb 25, 1:25 AM CST	River Flood Warning	OHX	Bedford	6 days

Nearby

Tornado Warnings in Tennessee, 2011 Every tornado warning in 2011 Tornadoes 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.