Alert archive / Tennessee / Tornado Warnings in 2013

Tornado Warning 45, NWS Nashville, TN

December 21, 2013Macon County, Sumner County, Trousdale County, Tennessee

NWS Nashville, TN issued this tornado warning at Dec 21, 2013, 9:21 PM CST for Macon County, Sumner County, Trousdale County, Tennessee. It was in force for 39 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: Dec 21, 2013, 9:21 PM CST (03:21 UTC)
Expired: Dec 21, 2013, 10:00 PM CST
In force: 39 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), 42 km from the middle of the area, began a volume at 03:21 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
Dec 21, 8:16 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.4 hours before the alert went out and 55 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: 417 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 587 m²/s²
0-3 km storm-relative helicity: 694 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

147 
WFUS54 KOHX 220321
TOROHX
TNC111-165-169-220400-
/O.NEW.KOHX.TO.W.0045.131222T0321Z-131222T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
921 PM CST SAT DEC 21 2013

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 1000 PM CST

* AT 916 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A
  TORNADO. THESE DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 6 MILES SOUTHEAST OF FRANKLIN TO WHITE HOUSE...AND MOVING EAST
  AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LAFAYETTE...WESTMORELAND...COTTONTOWN...OAK GROVE AND BETHPAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3663 8597 3639 8608 3641 8669 3658 8661
      3665 8655 3666 8651 3666 8635
TIME...MOT...LOC 0320Z 259DEG 39KT 3668 8645 3643 8656

$$

TB12

1 follow-up statement

001 
WWUS54 KOHX 220342
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
942 PM CST SAT DEC 21 2013

TNC111-165-169-220400-
/O.CON.KOHX.TO.W.0045.000000T0000Z-131222T0400Z/
SUMNER TN-TROUSDALE TN-MACON TN-
942 PM CST SAT DEC 21 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN MACON...NORTHERN
TROUSDALE AND NORTHEASTERN SUMNER COUNTIES UNTIL 1000 PM CST...

AT 939 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO.  THESE
DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM SCOTTSVILLE
TO 8 MILES SOUTHWEST OF WESTMORELAND...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  LAFAYETTE...WESTMORELAND...OAK GROVE AND BETHPAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

THIS LINE OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CST SUNDAY MORNING
FOR CENTRAL TENNESSEE. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
200 AM CST SUNDAY MORNING FOR CENTRAL TENNESSEE.

LAT...LON 3665 8639 3663 8597 3639 8608 3641 8654
TIME...MOT...LOC 0343Z 259DEG 39KT 3672 8614 3648 8626

$$

TB12

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 21, 7:36 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	24 min
Dec 21, 7:53 PM CST	Severe Thunderstorm Warning	OHX	Benton, Humphreys, Perry	22 min
Dec 21, 7:56 PM CST	Severe Thunderstorm Warning	OHX	Benton, Dickson, Houston, Humphreys, Montgomery, Stewart	34 min
Dec 21, 8:00 PM CST	Tornado Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	30 min
Dec 21, 8:09 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys, Lewis, Perry, Wayne	36 min
Dec 21, 8:18 PM CST	Severe Thunderstorm Warning	OHX	Wayne	42 min
Dec 21, 8:21 PM CST	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	39 min
Dec 21, 8:24 PM CST	Tornado Warning	OHX	Cheatham, Dickson, Humphreys, Montgomery	36 min
Dec 21, 8:39 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Lawrence, Lewis, Maury and 3 more	36 min
Dec 21, 8:42 PM CST	Tornado Warning	OHX	Dickson, Hickman, Williamson	33 min
Dec 21, 8:51 PM CST	Tornado Warning	OHX	Cheatham, Davidson, Dickson, Sumner, Williamson	24 min
Dec 21, 8:53 PM CST	Tornado Warning	OHX	Robertson, Sumner	37 min
Dec 21, 9:05 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Hickman, Lawrence, Lewis, Maury, Wayne and 1 more	40 min
Dec 21, 9:13 PM CST	Tornado Warning	OHX	Davidson, Sumner, Wilson	32 min
Dec 21, 9:15 PM CST	Special Weather Statement	OHX	Lawrence, Wayne	45 min
Dec 21, 9:37 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Davidson, Giles, Lawrence, Marshall, Maury and 3 more	38 min
Dec 21, 9:38 PM CST	Tornado Warning	OHX	Davidson, Sumner, Trousdale, Wilson	22 min
Dec 21, 9:53 PM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith, Trousdale	37 min
Dec 21, 9:56 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Trousdale, Wilson	49 min
Dec 21, 10:09 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, DeKalb, Giles, Lawrence, Marshall and 3 more	36 min
Dec 21, 10:09 PM CST	Tornado Warning	OHX	Smith, Wilson	36 min
Dec 21, 10:12 PM CST	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	33 min
Dec 21, 10:18 PM CST	Tornado Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	27 min
Dec 21, 10:30 PM CST	Tornado Warning	OHX	Clay, Jackson, Smith	30 min
Dec 21, 10:34 PM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton, Pickett	26 min
Dec 21, 10:42 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, DeKalb, Giles, Lawrence, Marshall and 2 more	48 min
Dec 21, 10:44 PM CST	Severe Thunderstorm Warning	OHX	Jackson, Overton, Pickett, Putnam, Smith	31 min
Dec 21, 10:59 PM CST	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	31 min
Dec 21, 11:02 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, DeKalb, Putnam, Rutherford and 2 more	43 min
Dec 21, 11:16 PM CST	Severe Thunderstorm Warning	OHX	Fentress, Overton, Pickett, Putnam	59 min
Dec 21, 11:36 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Fentress, Overton, Putnam, Van Buren and 2 more	39 min
Dec 21, 11:44 PM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	46 min
Dec 22, 12:13 AM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Putnam, Van Buren, White	47 min
Dec 22, 12:16 AM CST	Severe Thunderstorm Warning	OHX	Fentress	14 min
Dec 22, 12:29 AM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	31 min
Dec 22, 1:59 PM CST	River Flood Advisory	OHX	Grundy	10 hr

Nearby

Tornado Warnings in Tennessee, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.