Alert archive / Tennessee / Tornado Warnings in 2012

Tornado Warning 60, NWS Nashville, TN

September 17, 2012Coffee County, Tennessee

NWS Nashville, TN issued this tornado warning at Sep 17, 2012, 4:06 PM CDT for Coffee County, Tennessee. It was in force for 54 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: Sep 17, 2012, 4:06 PM CDT (21:06 UTC)
Expired: Sep 17, 2012, 5:00 PM CDT
In force: 54 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Coffee County, TN

The radar

The Northeast Alabama radar (KHTX), 70 km from the middle of the area, began a volume at 21:07 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
Sep 17, 4:25 PM CDT	TSTM WND DMG	7 Nw Manchester, TN	TREE DOWN ON 16TH MODEL ROAD
Sep 17, 4:28 PM CDT	TSTM WND DMG	9 Nnw Manchester, TN	TREE DOWN ON COLE RIDGE ROAD NORTH OF MANCHESTER
Sep 17, 4:45 PM CDT	FUNNEL CLOUD	6 Nnw Manchester, TN	FUNNEL CLOUD SPOTTED NEAR GOOSE POND ROAD AND FREDONIA ROAD NORTH OF MANCHESTER

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.1 hours before the alert went out and 77 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: 491 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 510 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

214 
WFUS54 KOHX 172106
TOROHX
TNC031-172200-
/O.NEW.KOHX.TO.W.0060.120917T2106Z-120917T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
406 PM CDT MON SEP 17 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN COFFEE COUNTY IN MIDDLE TENNESSEE...

* UNTIL 500 PM CDT

* AT 402 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 7 MILES EAST OF SHELBYVILLE...AND MOVING
  NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MANCHESTER.

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 3541 8626 3545 8624 3564 8624 3569 8618
      3566 8615 3565 8609 3565 8603 3566 8599
      3561 8595 3558 8595 3555 8591 3554 8591
      3540 8622
TIME...MOT...LOC 2107Z 233DEG 18KT 3547 8630

$$

TB12

1 follow-up statement

829 
WWUS54 KOHX 172145
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
445 PM CDT MON SEP 17 2012

TNC031-172200-
/O.CON.KOHX.TO.W.0060.000000T0000Z-120917T2200Z/
COFFEE TN-
445 PM CDT MON SEP 17 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL COFFEE
COUNTY UNTIL 500 PM CDT...

AT 444 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES NORTH OF MANCHESTER...MOVING NORTHEAST AT
20 MPH.

STORM SPOTTERS HAVE REPORTED SEEING A FUNNEL CLOUD NORTHWEST OF 
MANCHESTER AT 445 PM ASSOCIATED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN COFFEE COUNTY.

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 3555 8611 3562 8618 3566 8615 3565 8609
      3565 8603 3566 8599 3561 8595 3558 8595
TIME...MOT...LOC 2145Z 233DEG 18KT 3558 8611

$$

TB12

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 2:48 AM CDT	Flood Watch	OHX	Bedford, Cannon, Clay, Coffee, Cumberland, Davidson and 23 more	27 hr
Sep 17, 11:41 AM CDT	Areal Flood Advisory	OHX	Giles, Hickman, Lawrence, Lewis, Marshall, Maury and 1 more	6 hr
Sep 17, 1:46 PM CDT	Tornado Warning	OHX	Bedford	29 min
Sep 17, 2:11 PM CDT	Flash Flood Warning	OHX	Giles, Marshall	3 hr
Sep 17, 2:55 PM CDT	Areal Flood Advisory	OHX	Bedford, Rutherford, Williamson	6 hr
Sep 17, 3:55 PM CDT	Tornado Warning	OHX	Bedford	35 min
Sep 17, 3:56 PM CDT	Tornado Warning	OHX	Cannon, Coffee, Warren	34 min
Sep 17, 3:57 PM CDT	Tornado Warning	OHX	Van Buren, Warren, White	33 min
Sep 17, 4:26 PM CDT	Tornado Warning	OHX	DeKalb, Warren, White	34 min
Sep 17, 4:28 PM CDT	Tornado Warning	OHX	Van Buren, Warren, White	32 min
Sep 17, 4:43 PM CDT	Tornado Warning	OHX	Cannon, Warren	47 min
Sep 17, 6:15 PM CDT	Areal Flood Advisory	OHX	Cannon, Coffee, DeKalb, Jackson, Overton, Putnam and 2 more	4 hr

Nearby

Tornado Warnings in Tennessee, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.