Alert archive / Tennessee / Tornado Warnings in 2012

Tornado Warning 57, NWS Nashville, TN

September 17, 2012Bedford County, Tennessee

NWS Nashville, TN issued this tornado warning at Sep 17, 2012, 3:55 PM CDT for Bedford County, Tennessee. It was in force for 35 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, 3:55 PM CDT (20:55 UTC)
Expired: Sep 17, 2012, 4:30 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Bedford County, TN

The radar

The Northeast Alabama radar (KHTX), 67 km from the middle of the area, began a volume at 20:57 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, 4:00 PM CDT	TSTM WND DMG	6 E Shelbyville, TN	SEVERAL TREES BLOWN DOWN ON A PROPERTY ON HIGHWAY 41A SOUTH ABOUT 6 MILES EAST OF SHELBYVILLE. SHINGLES WERE ALSO BLOWN OFF HOUSE.
Sep 17, 4:02 PM CDT	TORNADO	4 W Normandy, TN	AN EF0 TORNADO TOUCHED DOWN AT A RESIDENCE ALONG HWY 41A APPROXIMATELY 1/2 MILE EAST OF THE HWY 41A - NORMANDY ROAD INTERSECTION. DOZENS OF TREES WERE SNAPPED AND UPROOTED AT THISLOCATION AND THE RESIDENCE SUFFERED ROOF DAMAGE WITH MANY SHINGLES BLOWN OFF. THE
Sep 17, 4:15 PM CDT	TSTM WND DMG	3 N Normandy, TN	PUBLIC REPORTED TELEPHONE POLES BLOWN DOWN IN THE CORTNER COMMUNITY NORTH OF NORMANDY. POSSIBLE TORNADO.

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, 8.9 hours before the alert went out and 74 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.

832 
WFUS54 KOHX 172055
TOROHX
TNC003-172130-
/O.NEW.KOHX.TO.W.0057.120917T2055Z-120917T2130Z/

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL BEDFORD COUNTY IN MIDDLE TENNESSEE...

* UNTIL 430 PM CDT

* AT 352 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES SOUTHEAST OF SHELBYVILLE...AND MOVING
  NORTHEAST AT 25 MPH.

* THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
  BEDFORD COUNTY...INCLUDING THE FOLLOWING LOCATIONS NORMANDY AND
  WARTRACE.

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.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NASHVILLE.

&&

LAT...LON 3546 8646 3562 8625 3562 8624 3554 8624
      3542 8625 3538 8640
TIME...MOT...LOC 2055Z 230DEG 22KT 3543 8637

$$

AL

1 follow-up statement

868 
WWUS54 KOHX 172125
SVSOHX

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

TNC003-172130-
/O.CON.KOHX.TO.W.0057.000000T0000Z-120917T2130Z/
BEDFORD TN-
425 PM CDT MON SEP 17 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL BEDFORD
COUNTY UNTIL 430 PM CDT...

AT 420 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 9 MILES NORTHWEST OF MANCHESTER...MOVING NORTHEAST
AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NASHVILLE.

&&

LAT...LON 3559 8628 3562 8625 3562 8624 3560 8624
      3554 8624 3542 8625 3541 8630
TIME...MOT...LOC 2125Z 230DEG 22KT 3555 8620

$$

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, 3:56 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, 4:06 PM CDT	Tornado Warning	OHX	Coffee	54 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.