Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 293, NWS Nashville, TN

July 19, 20125 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 19, 2012, 9:57 PM CDT for 5 counties in Tennessee. It was in force for 33 min. 1 report 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: Jul 19, 2012, 9:57 PM CDT (02:57 UTC)
Expired: Jul 19, 2012, 10:30 PM CDT
In force: 33 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Macon County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 51 km from the middle of the area, began a volume at 02:58 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.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 10:03 PM CDT	TSTM WND DMG	1 E Mount Juliet, TN	NWS STORM SURVEY FOUND MICROBURST WIND DAMAGE ACROSS EASTERN MOUNT JULIET. SCATTERED TREES AND LARGE TREE LIMBS WERE SNAPPED OR BLOWN DOWN ON SEVERAL ROADWAYS INCLUDING LEBANON ROAD...CURD ROAD...GREYSTONE ROAD...AND THURMAN STREET. WIND SPEEDS WERE ESTIMATED

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
Jul 19, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.0 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: 2853 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1475 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

560 
WUUS54 KOHX 200257
SVROHX
TNC111-159-165-169-189-200330-
/O.NEW.KOHX.SV.W.0293.120720T0257Z-120720T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
957 PM CDT THU JUL 19 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SMITH COUNTY...
  SOUTH CENTRAL SUMNER COUNTY...
  TROUSDALE COUNTY...
  WILSON COUNTY...
  SOUTH CENTRAL MACON COUNTY...

* UNTIL 1030 PM CDT

* AT 953 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THESE SEVERE STORMS EXTENDED FROM LAFAYETTE TO
  GREEN HILL...AND WERE MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LEBANON...
  CARTHAGE...
  WATERTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING 
WIDESPREAD WIND DAMAGE. TAKE SHELTER NOW INSIDE A STURDY 
BUILDING...AND STAY AWAY FROM WINDOWS!

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS LINE OF
SEVERE THUNDERSTORMS. MOVE INDOORS IMMEDIATELY! REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3630 8584 3625 8583 3625 8581 3626 8580
      3622 8578 3621 8580 3619 8580 3608 8604
      3609 8605 3607 8606 3597 8629 3599 8633
      3627 8663 3651 8607
TIME...MOT...LOC 0257Z 324DEG 26KT 3641 8598 3619 8654

$$

FORECASTER: ROSE

2 follow-up statements

759 
WWUS54 KOHX 200317
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1017 PM CDT THU JUL 19 2012

TNC111-165-169-200327-
/O.CAN.KOHX.SV.W.0293.000000T0000Z-120720T0330Z/
SUMNER TN-TROUSDALE TN-MACON TN-
1017 PM CDT THU JUL 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MACON...
TROUSDALE AND SOUTH CENTRAL SUMNER COUNTIES IS CANCELED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 3631 8585 3625 8583 3626 8580 3622 8578
      3618 8581 3608 8603 3609 8605 3606 8607
      3597 8628 3601 8636 3617 8652 3632 8616
      3629 8613 3635 8608 3640 8595
TIME...MOT...LOC 0317Z 324DEG 26KT 3633 8587 3611 8643

$$

TNC159-189-200330-
/O.CON.KOHX.SV.W.0293.000000T0000Z-120720T0330Z/
SMITH TN-WILSON TN-
1017 PM CDT THU JUL 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WILSON AND
SMITH COUNTIES UNTIL 1030 PM CDT...

AT 1012 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 7 MILES NORTH OF CARTHAGE TO BELINDA CITY...MOVING SOUTHEAST AT
30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  CARTHAGE AROUND 1025 PM CDT.
  GORDONSVILLE AND WATERTOWN AROUND 1030 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE SOUTH
CARTHAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING. MOVE INDOORS IMMEDIATELY! LIGHTNING 
IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3631 8585 3625 8583 3626 8580 3622 8578
      3618 8581 3608 8603 3609 8605 3606 8607
      3597 8628 3601 8636 3617 8652 3632 8616
      3629 8613 3635 8608 3640 8595
TIME...MOT...LOC 0317Z 324DEG 26KT 3633 8587 3611 8643

$$

ROSE

598 
WWUS54 KOHX 200329
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1029 PM CDT THU JUL 19 2012

TNC159-189-200340-
/O.EXP.KOHX.SV.W.0293.000000T0000Z-120720T0330Z/
SMITH TN-WILSON TN-
1029 PM CDT THU JUL 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR WILSON AND SMITH COUNTIES HAS
EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 3631 8585 3625 8583 3626 8580 3622 8578
      3618 8581 3608 8603 3609 8605 3606 8607
      3597 8628 3601 8636 3617 8652 3632 8616
      3629 8613 3635 8608 3640 8595
TIME...MOT...LOC 0330Z 324DEG 26KT 3625 8580 3603 8636

$$

ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:55 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Montgomery, Robertson	35 min
Jul 19, 8:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	33 min
Jul 19, 8:51 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton, Smith	54 min
Jul 19, 8:56 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	34 min
Jul 19, 9:00 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner, Wilson	15 min
Jul 19, 9:23 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	37 min
Jul 19, 9:29 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Sumner, Wilson	31 min
Jul 19, 9:36 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson	24 min
Jul 19, 9:46 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Overton, Pickett, Smith	29 min
Jul 19, 10:00 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery, Stewart	45 min
Jul 19, 10:01 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Rutherford, Sumner, Williamson and 1 more	29 min
Jul 19, 10:14 PM CDT	Special Weather Statement	OHX	Fentress, Jackson, Overton, Putnam	46 min
Jul 19, 10:29 PM CDT	Special Weather Statement	OHX	Davidson, Smith, Williamson, Wilson	31 min
Jul 19, 10:41 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	19 min
Jul 19, 10:59 PM CDT	Special Weather Statement	OHX	Cannon, Cumberland, DeKalb, Putnam, Rutherford, White and 1 more	31 min
Jul 19, 11:18 PM CDT	Special Weather Statement	OHX	Stewart	27 min
Jul 19, 11:36 PM CDT	Special Weather Statement	OHX	Robertson, Sumner	24 min
Jul 20, 12:20 AM CDT	Special Weather Statement	OHX	Montgomery	40 min
Jul 20, 12:26 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Wilson	49 min
Jul 20, 12:41 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	34 min
Jul 20, 1:32 AM CDT	Areal Flood Advisory	OHX	Davidson, Rutherford, Williamson, Wilson	3 hr
Jul 20, 2:56 AM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Maury, Williamson	3 hr
Jul 20, 3:57 AM CDT	Areal Flood Advisory	OHX	Davidson, Sumner, Wilson	2 hr
Jul 20, 7:01 AM CDT	River Flood Advisory	OHX	Bedford	9 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.