Alert archive / Tennessee / Tornado Warnings in 2014

Tornado Warning 7, NWS Nashville, TN

February 20, 2014Coffee County, Grundy County, Tennessee

NWS Nashville, TN issued this tornado warning at Feb 20, 2014, 10:29 PM CST for Coffee County, Grundy County, Tennessee. It was in force for 31 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 20, 2014, 10:29 PM CST (04:29 UTC)
Expired: Feb 20, 2014, 11:00 PM CST
In force: 31 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Coffee County, TN, Grundy County, TN

The radar

The Northeast Alabama radar (KHTX), 57 km from the middle of the area, began a volume at 04:29 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 was reported inside it

Time	Report	Where	Remark
Feb 20, 10:29 PM CST	TORNADO	11 Wnw Tracy City, TN	AN EF1 TORNADO TOUCHED DOWN ALONG I-24 AROUND 3 MILES NW OF PELHAM DAMAGING TWO BILLBOARDS. SEVERAL TREES WERE UPROOTED ALONG BETSY WILLIS ROAD. A FARM ON HWY 41 SUFFERED SIGNIFICANT DAMAGE WITH 3 GRAIN SILOS AND AN OUTBUILDING DESTROYED WITH A BARN LOSING PAR
Feb 20, 10:30 PM CST	TSTM WND DMG	11 Wnw Tracy City, TN	PUBLIC REPORTED SEVERAL GRAIN SILOS WERE DAMAGED AND DESTROYED ALONG HIGHWAY 41 NEAR BETSY WILLIS ROAD IN HILLSBORO. DEBRIS WAS BLOWN ACROSS THE HIGHWAY INTO ADJACENT FIELDS. POSSIBLE TORNADO.
Feb 20, 10:50 PM CST	TSTM WND DMG	Gruetli-Laager, TN	PUBLIC REPORTED SEVERAL TREES DOWN ON ROADS AROUND GRUETLI-LAAGER AND PALMER INCLUDING COLONY ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 20, 6:49 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.5 hours before the alert went out and 111 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: 231 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 346 m²/s²
0-3 km storm-relative helicity: 386 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

900 
WFUS54 KOHX 210429
TOROHX
TNC031-061-210500-
/O.NEW.KOHX.TO.W.0007.140221T0429Z-140221T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1029 PM CST THU FEB 20 2014

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN COFFEE COUNTY IN MIDDLE TENNESSEE...
  GRUNDY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1100 PM CST

* AT 1026 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
  DANGEROUS STORM WAS LOCATED 7 MILES NORTH OF SEWANEE...OR 11 MILES
  NORTHEAST OF WINCHESTER...AND MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GRUETLI-LAAGER...HILLSBORO...PELHAM...COALMONT...ALTAMONT...
  BEERSHEBA SPRINGS AND PALMER.

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 3525 8590 3528 8592 3531 8598 3531 8600
      3534 8604 3535 8607 3552 8579 3553 8574
      3553 8560 3549 8553 3544 8553 3541 8548
      3537 8550
TIME...MOT...LOC 0429Z 236DEG 50KT 3533 8592

$$

SHAMBURGER

2 follow-up statements

403 
WWUS54 KOHX 210441
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1041 PM CST THU FEB 20 2014

TNC031-210451-
/O.CAN.KOHX.TO.W.0007.000000T0000Z-140221T0500Z/
COFFEE TN-
1041 PM CST THU FEB 20 2014

...THE TORNADO WARNING FOR SOUTHEASTERN COFFEE COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST FRIDAY MORNING FOR
CENTRAL TENNESSEE.

LAT...LON 3528 8592 3534 8590 3537 8587 3538 8588
      3546 8589 3552 8579 3553 8560 3549 8553
      3544 8553 3541 8548 3537 8550 3527 8581
      3525 8590
TIME...MOT...LOC 0441Z 231DEG 51KT 3544 8578

$$

TNC061-210500-
/O.CON.KOHX.TO.W.0007.000000T0000Z-140221T0500Z/
GRUNDY TN-
1041 PM CST THU FEB 20 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR GRUNDY
COUNTY...

AT 1039 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR ALTAMONT...OR 16
MILES EAST OF MANCHESTER...MOVING NORTHEAST AT 60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GRUETLI-LAAGER...BEERSHEBA SPRINGS AND PALMER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST FRIDAY MORNING FOR
CENTRAL TENNESSEE.

&&

LAT...LON 3528 8592 3534 8590 3537 8587 3538 8588
      3546 8589 3552 8579 3553 8560 3549 8553
      3544 8553 3541 8548 3537 8550 3527 8581
      3525 8590
TIME...MOT...LOC 0441Z 231DEG 51KT 3544 8578

$$

SHAMBURGER

244 
WWUS54 KOHX 210451
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1051 PM CST THU FEB 20 2014

TNC061-210500-
/O.CAN.KOHX.TO.W.0007.000000T0000Z-140221T0500Z/
GRUNDY TN-
1051 PM CST THU FEB 20 2014

...THE TORNADO WARNING FOR GRUNDY COUNTY IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND 
NO LONGER APPEARED CAPABLE OF PRODUCING A TORNADO.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST FRIDAY MORNING FOR
CENTRAL TENNESSEE.

LAT...LON 3528 8592 3534 8590 3537 8587 3538 8588
      3546 8589 3552 8579 3553 8560 3549 8553
      3544 8553 3541 8548 3537 8550 3527 8581
      3525 8590
TIME...MOT...LOC 0450Z 231DEG 51KT 3552 8565

$$

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 6:34 PM CST	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Lewis, Perry	56 min
Feb 20, 6:34 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery, Robertson	26 min
Feb 20, 6:41 PM CST	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	49 min
Feb 20, 6:58 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson	32 min
Feb 20, 7:14 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	16 min
Feb 20, 7:15 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Lewis, Marshall, Maury, Williamson	45 min
Feb 20, 7:15 PM CST	Tornado Warning	OHX	Robertson, Sumner	30 min
Feb 20, 7:25 PM CST	Severe Thunderstorm Warning	OHX	Robertson, Sumner	35 min
Feb 20, 7:28 PM CST	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury, Wayne	47 min
Feb 20, 7:31 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson, Sumner	44 min
Feb 20, 7:56 PM CST	Tornado Warning	OHX	Davidson, Maury, Rutherford, Williamson	34 min
Feb 20, 8:07 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Macon, Robertson, Rutherford, Sumner, Trousdale and 1 more	38 min
Feb 20, 8:09 PM CST	Tornado Warning	OHX	Davidson, Sumner, Wilson	36 min
Feb 20, 8:18 PM CST	Special Weather Statement	OHX	Giles, Lawrence, Marshall, Rutherford	42 min
Feb 20, 8:23 PM CST	Severe Thunderstorm Warning	OHX	Rutherford, Wilson	37 min
Feb 20, 8:35 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	25 min
Feb 20, 8:37 PM CST	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Smith, Sumner and 2 more	38 min
Feb 20, 8:52 PM CST	Special Weather Statement	OHX	Giles, Marshall	38 min
Feb 20, 9:07 PM CST	Severe Thunderstorm Warning	OHX	Giles, Marshall	38 min
Feb 20, 9:08 PM CST	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Overton, Pickett, Putnam and 2 more	37 min
Feb 20, 9:24 PM CST	Tornado Warning	OHX	Clay, Jackson, Overton	36 min
Feb 20, 9:40 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Warren	35 min
Feb 20, 9:41 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Putnam, White	34 min
Feb 20, 9:45 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Fentress, Overton, Pickett, Putnam, White	45 min
Feb 20, 9:47 PM CST	Tornado Warning	OHX	Clay, Overton, Pickett	13 min
Feb 20, 10:03 PM CST	Tornado Warning	OHX	Bedford, Coffee	27 min
Feb 20, 10:14 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Grundy, Van Buren, Warren	61 min
Feb 20, 10:15 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Putnam, White	45 min
Feb 20, 10:26 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam	34 min
Feb 20, 11:19 PM CST	Special Weather Statement	OHX	Cumberland	56 min

Nearby

Tornado Warnings in Tennessee, 2014 Every tornado warning in 2014 Tornadoes in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.