Alert archive / Tennessee / Tornado Warnings in 2012

Tornado Warning 3, NWS Morristown, TN

February 29, 20124 counties in Tennessee

NWS Morristown, TN issued this tornado warning at Feb 29, 2012, 5:37 PM EST for 4 counties in Tennessee. It was in force for 38 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: Feb 29, 2012, 5:37 PM EST (22:37 UTC)
Expired: Feb 29, 2012, 6:15 PM EST
In force: 38 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Anderson County, TN, Campbell County, TN, Morgan County, TN, Scott County, TN

The radar

The Knoxville radar (KMRX), 108 km from the middle of the area, began a volume at 22:38 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, 5:45 PM EST	TSTM WND DMG	2 Nw Norris, TN	SEVERAL TREES DOWN.
Feb 29, 5:45 PM EST	HAIL 1.75	2 Nw Norris, 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
Feb 29, 12:31 PM EST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.6 hours before the alert went out and 180 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.

223 
WFUS54 KMRX 292237
TORMRX
TNC001-013-129-151-292315-
/O.NEW.KMRX.TO.W.0003.120229T2237Z-120229T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KNOXVILLE-TRI CITIES TN
ISSUED BY NATIONAL WEATHER SERVICE PEACHTREE CITY GA
537 PM EST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN KNOXVILLE-TRI CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN ANDERSON COUNTY IN TENNESSEE
  WESTERN CAMPBELL COUNTY IN TENNESSEE
  NORTHERN MORGAN COUNTY IN TENNESSEE
  SOUTHERN SCOTT COUNTY IN TENNESSEE

* UNTIL 615 PM EST

* AT 533 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 26 MILES WEST OF
  WARTBURG...MOVING EAST AT 65 MPH. THIS STORM HAS A HISTORY OF 
PRODUCING
  DAMAGE. TAKE SHELTER NOW.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LA
  FOLLETTE AND JACKSBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN A MOBILE HOME OR VEHICLE...EVACUATE THEM AND GET INSIDE
A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

&&

LAT...LON 3611 8410 3607 8480 3608 8480 3609 8484
      3615 8491 3621 8491 3624 8489 3652 8406
TIME...MOT...LOC 2235Z 258DEG 57KT 3612 8501

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 29, 5:17 PM EST	Severe Thunderstorm Warning	MRX	Anderson, Campbell	58 min
Feb 29, 5:36 PM EST	Tornado Warning	MRX	Anderson, Campbell, Morgan, Scott	39 min
Feb 29, 6:20 PM EST	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, Meigs, Rhea, Sequatchie	40 min

Nearby

Tornado Warnings in Tennessee, 2012 Every tornado warning in 2012 Tornadoes 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.