Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 70, NWS Nashville, TN

March 15, 20126 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 15, 2012, 3:03 PM CDT for 6 counties in Tennessee. It was in force for 26 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: Mar 15, 2012, 3:03 PM CDT (20:03 UTC)
Expired: Mar 15, 2012, 3:29 PM CDT
In force: 26 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Robertson County, TN, Rutherford County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 20 km from the middle of the area, began a volume at 20:05 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
Mar 15, 3:24 PM CDT	HAIL 0.88	Gallatin, TN	REPORTED BY GALLATIN FD AT OLD HWY 109 AT OLD DOUGLAS LANE

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
Mar 15, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.1 hours before the alert went out and 22 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: 1726 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 108 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.

878 
WUUS54 KOHX 152003
SVROHX
TNC037-147-149-165-169-189-152100-
/O.NEW.KOHX.SV.W.0070.120315T2003Z-120315T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
303 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL ROBERTSON COUNTY IN MIDDLE TENNESSEE...
  NORTH CENTRAL RUTHERFORD COUNTY IN MIDDLE TENNESSEE...
  SOUTHERN SUMNER COUNTY IN MIDDLE TENNESSEE...
  WEST CENTRAL TROUSDALE COUNTY IN MIDDLE TENNESSEE...
  WESTERN WILSON COUNTY IN MIDDLE TENNESSEE...
  DAVIDSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 400 PM CDT

* AT 300 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE SEVERE STORMS
  EXTENDED FROM RIDGETOP TO PEGRAM...AND WERE MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MILLERSVILLE...
  NASHVILLE...
  OAK HILL...
  LAKEWOOD...
  GREEN HILL...
  GALLATIN...
  RURAL HILL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM THURSDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3642 8624 3599 8646 3605 8693 3609 8704
      3613 8700 3623 8698 3633 8692 3636 8692
      3636 8691 3637 8691 3642 8688
TIME...MOT...LOC 2003Z 273DEG 18KT 3639 8679 3607 8694

$$

SHAMBURGER

1 follow-up statement

011 
WWUS54 KOHX 152029
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
329 PM CDT THU MAR 15 2012

TNC037-147-149-165-169-189-152040-
/O.CAN.KOHX.SV.W.0070.000000T0000Z-120315T2100Z/
ROBERTSON TN-RUTHERFORD TN-SUMNER TN-TROUSDALE TN-WILSON TN-
DAVIDSON TN-
329 PM CDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR DAVIDSON...WESTERN WILSON...
TROUSDALE...SOUTHERN SUMNER...NORTH CENTRAL RUTHERFORD AND SOUTH
CENTRAL ROBERTSON COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THESE
THUNDERSTORMS.

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

LAT...LON 3642 8624 3599 8646 3605 8693 3609 8704
      3613 8700 3623 8698 3633 8692 3636 8692
      3636 8691 3637 8691 3642 8688
TIME...MOT...LOC 2030Z 273DEG 18KT 3638 8662 3606 8677

$$

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 14, 7:35 PM CDT	Special Weather Statement	OHX	Clay, Macon, Trousdale	55 min
Mar 15, 1:21 AM CDT	Special Weather Statement	OHX	Cumberland, White	54 min
Mar 15, 1:52 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	38 min
Mar 15, 12:16 PM CDT	Special Weather Statement	OHX	Williamson	59 min
Mar 15, 12:39 PM CDT	Special Weather Statement	OHX	Montgomery, Stewart	66 min
Mar 15, 12:47 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	35 min
Mar 15, 12:59 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Stewart	61 min
Mar 15, 1:20 PM CDT	Special Weather Statement	OHX	Williamson	55 min
Mar 15, 1:31 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Montgomery, Stewart	44 min
Mar 15, 1:49 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	41 min
Mar 15, 2:13 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery, Stewart	47 min
Mar 15, 2:19 PM CDT	Flash Flood Warning	OHX	Williamson	3 hr
Mar 15, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Maury, Williamson	48 min
Mar 15, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	43 min
Mar 15, 2:42 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner, Trousdale	63 min
Mar 15, 3:07 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	53 min
Mar 15, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	33 min
Mar 15, 3:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	33 min
Mar 15, 4:08 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys	37 min
Mar 15, 4:19 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	26 min
Mar 15, 4:23 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson	37 min
Mar 15, 4:37 PM CDT	Severe Thunderstorm Warning	OHX	Overton, Putnam	23 min
Mar 15, 4:39 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Rutherford, Williamson	36 min
Mar 15, 5:05 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Overton, Pickett	40 min
Mar 15, 5:07 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury, Rutherford, Williamson	38 min
Mar 15, 5:24 PM CDT	Flash Flood Warning	OHX	Williamson	3 hr
Mar 15, 5:31 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, Rutherford, Wilson	44 min
Mar 15, 5:45 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Marshall, Rutherford	45 min
Mar 15, 6:03 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.