Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 92, NWS Nashville, TN

March 31, 20125 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 31, 2012, 1:55 PM CDT for 5 counties in Tennessee. It was in force for 35 min. 2 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: Mar 31, 2012, 1:55 PM CDT (18:55 UTC)
Expired: Mar 31, 2012, 2:30 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Coffee County, TN, Marshall County, TN, Maury County, TN, Rutherford County, TN

The radar

The Nashville radar (KOHX), 75 km from the middle of the area, began a volume at 18:58 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
Mar 31, 2:30 PM CDT	HAIL 1.25	Columbia, TN
Mar 31, 2:32 PM CDT	HAIL 1	Columbia, TN

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 31, 12:47 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.9 hours before the alert went out and 62 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: 1321 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 509 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

148 
WUUS54 KOHX 311855
SVROHX
TNC003-031-117-119-149-311930-
/O.NEW.KOHX.SV.W.0092.120331T1855Z-120331T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
155 PM CDT SAT MAR 31 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN RUTHERFORD COUNTY IN MIDDLE TENNESSEE...
  BEDFORD COUNTY IN MIDDLE TENNESSEE...
  COFFEE COUNTY IN MIDDLE TENNESSEE...
  NORTHERN MARSHALL COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL MAURY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 230 PM CDT

* AT 150 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE DAMAGING
  HAIL UP TO GOLF BALL SIZE. THESE SEVERE STORMS EXTENDED FROM
  COLUMBIA TO CHAPEL HILL TO BELL BUCKLE...AND WERE MOVING SOUTHEAST
  AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHELBYVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING LARGE 
HAIL. TAKE SHELTER NOW INSIDE A STURDY BUILDING...AND STAY AWAY FROM 
WINDOWS! IF TIME ALLOWS...PUT YOUR AUTOMOBILES INTO A CARPORT OR 
GARAGE.

&&

LAT...LON 3544 8647 3539 8684 3567 8714 3572 8681
      3570 8674 3572 8669 3566 8623 3538 8593
TIME...MOT...LOC 1854Z 319DEG 21KT 3562 8696 3566 8670
          3561 8626

$$

FORECASTER: ROSE

1 follow-up statement

843 
WWUS54 KOHX 311914
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
214 PM CDT SAT MAR 31 2012

TNC003-031-117-119-149-311930-
/O.CON.KOHX.SV.W.0092.000000T0000Z-120331T1930Z/
RUTHERFORD TN-BEDFORD TN-COFFEE TN-MARSHALL TN-MAURY TN-
214 PM CDT SAT MAR 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
MAURY...NORTHERN MARSHALL...COFFEE...BEDFORD AND SOUTHWESTERN
RUTHERFORD COUNTIES UNTIL 230 PM CDT...

AT 211 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS PRODUCING GOLF BALL SIZE HAIL.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF LEWISBURG TO
12 MILES NORTHWEST OF SHELBYVILLE TO 7 MILES NORTHWEST OF
MANCHESTER...MOVING SOUTHEAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SHELBYVILLE...LEWISBURG AND MANCHESTER AROUND 230 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE NORMANDY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3544 8647 3539 8684 3567 8714 3572 8681
      3570 8674 3572 8669 3566 8623 3538 8593
TIME...MOT...LOC 1914Z 319DEG 21KT 3553 8687 3557 8661
          3552 8617

$$

ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 1:04 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford	26 min
Mar 31, 1:15 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Williamson	45 min
Mar 31, 1:25 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford	35 min
Mar 31, 2:01 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury	29 min
Mar 31, 2:08 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, White	17 min
Mar 31, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury	33 min
Mar 31, 2:29 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee	16 min
Mar 31, 2:35 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	25 min
Mar 31, 2:43 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, White	17 min
Mar 31, 2:57 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Maury	48 min
Mar 31, 3:18 PM CDT	Flash Flood Warning	OHX	Giles	3 hr
Mar 31, 3:25 PM CDT	Special Weather Statement	OHX	Perry	35 min
Mar 31, 3:31 PM CDT	Severe Thunderstorm Warning	OHX	Perry, Wayne	29 min
Mar 31, 3:41 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	49 min
Mar 31, 3:56 PM CDT	Tornado Warning	OHX	Giles	19 min
Mar 31, 3:58 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	32 min
Mar 31, 4:14 PM CDT	Tornado Warning	OHX	Giles	18 min
Mar 31, 4:23 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	37 min
Mar 31, 4:28 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	32 min
Mar 31, 4:35 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	25 min
Mar 31, 4:58 PM CDT	Severe Thunderstorm Warning	OHX	Marshall	32 min
Mar 31, 5:01 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	29 min
Mar 31, 5:12 PM CDT	Severe Thunderstorm Warning	OHX	Marshall	20 min
Mar 31, 5:19 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	26 min
Mar 31, 5:46 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	14 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.