Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 8, NWS Nashville, TN

January 23, 20124 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 23, 2012, 12:55 AM CST for 4 counties in Tennessee. It was in force for 15 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: Jan 23, 2012, 12:55 AM CST (06:55 UTC)
Expired: Jan 23, 2012, 1:10 AM CST
In force: 15 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Giles County, TN, Lawrence County, TN, Marshall County, TN, Maury County, TN

The radar

The Nashville radar (KOHX), 111 km from the middle of the area, began a volume at 06:58 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
Jan 22, 10:59 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.9 hours before the alert went out and 98 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 517 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 337 m²/s²
0-3 km storm-relative helicity: 371 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

281 
WUUS54 KOHX 230655
SVROHX
TNC055-099-117-119-230730-
/O.NEW.KOHX.SV.W.0008.120123T0655Z-120123T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1255 AM CST MON JAN 23 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GILES COUNTY IN MIDDLE TENNESSEE...
  NORTHEASTERN LAWRENCE COUNTY IN MIDDLE TENNESSEE...
  WEST CENTRAL MARSHALL COUNTY IN MIDDLE TENNESSEE...
  SOUTHWESTERN MAURY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 130 AM CST

* AT 1249 AM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 80 MPH. THE STORM WAS NEAR LAWRENCEBURG...MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOUNT PLEASANT...
  COLUMBIA...
  LEWISBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING WIND DAMAGE IN 
IRON CITY. TAKE SHELTER NOW INSIDE A STURDY BUILDING...AND STAY AWAY 
FROM WINDOWS!

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A
STRONG BUILDING...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 3529 8744 3545 8732 3545 8729 3546 8728
      3550 8728 3572 8711 3542 8670 3517 8733
TIME...MOT...LOC 0655Z 232DEG 45KT 3531 8730

$$

FORECASTER: ROSE

1 follow-up statement

382 
WWUS54 KOHX 230710
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
110 AM CST MON JAN 23 2012

TNC055-099-117-119-230720-
/O.CAN.KOHX.SV.W.0008.000000T0000Z-120123T0730Z/
GILES TN-LAWRENCE TN-MARSHALL TN-MAURY TN-
110 AM CST MON JAN 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR MAURY...SOUTHERN MARSHALL...
NORTHEASTERN LAWRENCE AND NORTHERN GILES COUNTIES IS CANCELED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 600 AM CST.

LAT...LON 3529 8744 3545 8732 3545 8729 3546 8728
      3550 8728 3572 8711 3542 8670 3517 8733
TIME...MOT...LOC 0710Z 232DEG 45KT 3542 8712

$$

ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 11:23 PM CST	Severe Thunderstorm Warning	OHX	Stewart	7 min
Jan 22, 11:40 PM CST	Special Weather Statement	OHX	Cheatham, Dickson, Giles, Hickman, Houston, Humphreys and 7 more	50 min
Jan 22, 11:53 PM CST	Tornado Warning	OHX	Wayne	37 min
Jan 22, 11:56 PM CST	Special Weather Statement	OHX	Cheatham, Dickson, Giles, Hickman, Houston, Humphreys and 7 more	64 min
Jan 23, 12:17 AM CST	Severe Thunderstorm Warning	OHX	Benton, Dickson, Houston, Humphreys	43 min
Jan 23, 12:25 AM CST	Tornado Warning	OHX	Hickman, Lawrence, Lewis, Maury, Perry, Wayne	20 min
Jan 23, 12:28 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 3 more	47 min
Jan 23, 12:40 AM CST	Special Weather Statement	OHX	Cheatham, Davidson, Dickson, Giles, Hickman, Lawrence and 12 more	50 min
Jan 23, 12:40 AM CST	Tornado Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery	35 min
Jan 23, 12:53 AM CST	Tornado Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	37 min
Jan 23, 1:13 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, DeKalb, Dickson, Macon, Robertson and 5 more	32 min
Jan 23, 1:21 AM CST	Tornado Warning	OHX	Cheatham, Davidson, Robertson, Sumner, Williamson	39 min
Jan 23, 1:35 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	25 min
Jan 23, 1:37 AM CST	Tornado Warning	OHX	Davidson, Sumner, Williamson, Wilson	23 min
Jan 23, 1:41 AM CST	Severe Thunderstorm Warning	OHX	Clay, Davidson, Jackson, Macon, Smith, Sumner and 3 more	34 min
Jan 23, 2:09 AM CST	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Putnam, Rutherford and 3 more	36 min
Jan 23, 2:17 AM CST	Severe Thunderstorm Warning	OHX	Bedford, Coffee	28 min
Jan 23, 2:46 AM CST	Severe Thunderstorm Warning	OHX	Clay, Cumberland, DeKalb, Fentress, Jackson, Overton and 3 more	59 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.