Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Nashville, TN

February 29, 20124 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 29, 2012, 3:04 PM CST for 4 counties in Tennessee. It was in force for 26 min. 6 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: Feb 29, 2012, 3:04 PM CST (21:04 UTC)
Expired: Feb 29, 2012, 3:30 PM CST
In force: 26 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Jackson County, TN, Overton County, TN, Putnam County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 109 km from the middle of the area, began a volume at 21:05 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
Feb 29, 3:19 PM CST	TSTM WND GST 0	7 N Cookeville, TN	60-70 MPH WINDS REPORTED NORTH OF COOKEVILLE ALONG WITH PEA-SIZED HAIL.
Feb 29, 3:19 PM CST	TSTM WND GST 70	7 N Cookeville, TN	60-70 MPH WINDS REPORTED NORTH OF COOKEVILLE ALONG WITH PEA-SIZED HAIL.
Feb 29, 3:24 PM CST	TSTM WND DMG	10 Ssw Livingston, TN	BARN SUFFERED ROOF DAMAGE. ALSO HALF DOLLAR SIZED HAIL WAS REPORTED.
Feb 29, 3:30 PM CST	TSTM WND DMG	8 N Cookeville, TN	TREES DOWN. QUARTER SIZED HAIL ALSO REPORTED.
Feb 29, 3:30 PM CST	HAIL 1	5 Nne Algood, TN	QUARTER SIZED HAIL REPORTED IN HICKMAN COUNTY
Feb 29, 3:35 PM CST	HAIL 1	3 S Livingston, TN	HAIL REPORTED NEAR HIGHWAY 84 AND INDUSTRIAL DRIVE

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
Feb 29, 11:31 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.1 hours before the alert went out and 115 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: 580 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 510 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 365 m²/s²
0-3 km storm-relative helicity: 485 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

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

409 
WUUS54 KOHX 292104
SVROHX
TNC087-133-141-159-292130-
/O.NEW.KOHX.SV.W.0021.120229T2104Z-120229T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
304 PM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OVERTON COUNTY IN MIDDLE TENNESSEE...
  NORTHWESTERN PUTNAM COUNTY IN MIDDLE TENNESSEE...
  EASTERN SMITH COUNTY IN MIDDLE TENNESSEE...
  JACKSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 330 PM CST

* AT 301 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
  CARTHAGE...MOVING EAST AT 70 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GAINESBORO...
  LIVINGSTON...

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM WEDNESDAY EVENING FOR
CENTRAL TENNESSEE.

&&

LAT...LON 3646 8515 3643 8514 3640 8512 3630 8512
      3623 8510 3615 8588 3634 8590 3644 8553
      3640 8550 3646 8548 3652 8524
TIME...MOT...LOC 2104Z 261DEG 61KT 3627 8573

$$

SHAMBURGER

1 follow-up statement

595 
WWUS54 KOHX 292118
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
318 PM CST WED FEB 29 2012

TNC159-292127-
/O.CAN.KOHX.SV.W.0021.000000T0000Z-120229T2130Z/
SMITH TN-
318 PM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SMITH COUNTY IS
CANCELLED...

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

LAT...LON 3646 8515 3640 8512 3630 8512 3623 8510
      3616 8581 3618 8579 3618 8581 3619 8579
      3621 8581 3621 8578 3624 8578 3627 8584
      3644 8553 3640 8550 3646 8548 3652 8524
TIME...MOT...LOC 2117Z 262DEG 58KT 3629 8547

$$

TNC087-133-141-292130-
/O.CON.KOHX.SV.W.0021.000000T0000Z-120229T2130Z/
OVERTON TN-PUTNAM TN-JACKSON TN-
318 PM CST WED FEB 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
JACKSON...NORTHWESTERN PUTNAM AND OVERTON COUNTIES UNTIL 330 PM
CST...

AT 315 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7
MILES NORTHWEST OF ALGOOD...OR 9 MILES NORTH OF COOKEVILLE...MOVING
EAST AT 65 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LIVINGSTON AROUND 325 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3646 8515 3640 8512 3630 8512 3623 8510
      3616 8581 3618 8579 3618 8581 3619 8579
      3621 8581 3621 8578 3624 8578 3627 8584
      3644 8553 3640 8550 3646 8548 3652 8524
TIME...MOT...LOC 2117Z 262DEG 58KT 3629 8547

$$

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 29, 10:35 AM CST	Special Weather Statement	OHX	Stewart	55 min
Feb 29, 11:26 AM CST	Tornado Warning	OHX	Houston, Montgomery, Stewart	34 min
Feb 29, 2:40 PM CST	Special Weather Statement	OHX	Pickett	35 min
Feb 29, 3:30 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Jackson, Overton, Pickett, Putnam	45 min
Feb 29, 3:33 PM CST	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Putnam, Smith, White, Wilson	27 min
Feb 29, 3:38 PM CST	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Putnam, Rutherford, Smith, White and 1 more	37 min
Feb 29, 3:46 PM CST	Tornado Warning	OHX	DeKalb, Putnam, White	29 min
Feb 29, 4:09 PM CST	Tornado Warning	OHX	Cumberland, Fentress, Overton, Putnam, White	36 min
Feb 29, 5:14 PM CST	Severe Thunderstorm Warning	OHX	Grundy	16 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.