Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 377, NWS Nashville, TN

December 17, 2012Bedford County, Marshall County, Rutherford County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Dec 17, 2012, 3:41 PM CST for Bedford County, Marshall County, Rutherford County, Tennessee. It was in force for 34 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: Dec 17, 2012, 3:41 PM CST (21:41 UTC)
Expired: Dec 17, 2012, 4:15 PM CST
In force: 34 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Marshall County, TN, Rutherford County, TN

The radar

The Nashville radar (KOHX), 72 km from the middle of the area, began a volume at 21:41 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
Dec 17, 11:26 AM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.7 hours before the alert went out and 60 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: 100 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 447 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 185 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.

890 
WUUS54 KOHX 172141
SVROHX
TNC003-117-149-172215-
/O.NEW.KOHX.SV.W.0377.121217T2141Z-121217T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
341 PM CST MON DEC 17 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL RUTHERFORD COUNTY IN MIDDLE TENNESSEE...
  NORTHERN BEDFORD COUNTY IN MIDDLE TENNESSEE...
  CENTRAL MARSHALL COUNTY IN MIDDLE TENNESSEE...

* UNTIL 415 PM CST

* AT 341 PM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR CHAPEL
  HILL...MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHELBYVILLE...

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 700 PM MONDAY
EVENING FOR CENTRAL TENNESSEE.
&&

LAT...LON 3569 8640 3549 8635 3546 8674 3565 8678
TIME...MOT...LOC 2141Z 264DEG 26KT 3555 8663

$$

FORECASTER: 31

1 follow-up statement

897 
WWUS54 KOHX 172154
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
354 PM CST MON DEC 17 2012

TNC117-172203-
/O.CAN.KOHX.SV.W.0377.000000T0000Z-121217T2215Z/
MARSHALL TN-
354 PM CST MON DEC 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARSHALL COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3558 8665 3558 8664 3558 8665 3567 8664
      3569 8640 3549 8635 3547 8665
TIME...MOT...LOC 2153Z 264DEG 26KT 3557 8653

$$

TNC003-149-172215-
/O.CON.KOHX.SV.W.0377.000000T0000Z-121217T2215Z/
RUTHERFORD TN-BEDFORD TN-
354 PM CST MON DEC 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
BEDFORD AND SOUTH CENTRAL RUTHERFORD COUNTIES UNTIL 415 PM CST...

AT 353 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED JUST
NORTHWEST OF SHELBYVILLE...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  SHELBYVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE
TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3558 8665 3558 8664 3558 8665 3567 8664
      3569 8640 3549 8635 3547 8665
TIME...MOT...LOC 2153Z 264DEG 26KT 3557 8653

$$
31

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 12:08 PM CST	Special Weather Statement	OHX	Robertson	67 min
Dec 17, 12:13 PM CST	Special Weather Statement	OHX	Benton, Dickson, Houston, Stewart	47 min
Dec 17, 12:21 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	24 min
Dec 17, 12:22 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	23 min
Dec 17, 1:06 PM CST	Special Weather Statement	OHX	Benton, Humphreys	24 min
Dec 17, 1:16 PM CST	Special Weather Statement	OHX	Montgomery, Robertson, Sumner	59 min
Dec 17, 1:39 PM CST	Special Weather Statement	OHX	Dickson, Hickman, Humphreys	51 min
Dec 17, 2:26 PM CST	Special Weather Statement	OHX	Cheatham, Davidson, Wilson	64 min
Dec 17, 2:33 PM CST	Special Weather Statement	OHX	Macon, Trousdale	27 min
Dec 17, 2:53 PM CST	Severe Thunderstorm Warning	OHX	Clay, Macon	37 min
Dec 17, 3:04 PM CST	Special Weather Statement	OHX	Macon, Trousdale	56 min
Dec 17, 3:12 PM CST	Special Weather Statement	OHX	Maury, Rutherford, Williamson	63 min
Dec 17, 3:21 PM CST	Special Weather Statement	OHX	Giles, Lawrence, Wayne	54 min
Dec 17, 3:34 PM CST	Special Weather Statement	OHX	Jackson, Smith, Wilson	56 min
Dec 17, 4:12 PM CST	Special Weather Statement	OHX	Coffee	63 min
Dec 17, 4:28 PM CST	Special Weather Statement	OHX	Fentress	32 min
Dec 17, 4:39 PM CST	Special Weather Statement	OHX	Giles	66 min
Dec 17, 5:17 PM CST	Special Weather Statement	OHX	Van Buren	28 min
Dec 17, 5:24 PM CST	Severe Thunderstorm Warning	OHX	Grundy, Van Buren, Warren	20 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.