Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 8, NWS Morristown, TN

March 23, 20115 counties in Tennessee

NWS Morristown, TN issued this tornado warning at Mar 23, 2011, 9:00 PM EDT for 5 counties in Tennessee. It was in force for 45 min. 3 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 23, 2011, 9:00 PM EDT (01:00 UTC)
Expired: Mar 23, 2011, 9:45 PM EDT
In force: 45 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Blount County, TN, Knox County, TN, Loudon County, TN, Monroe County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 105 km from the middle of the area, began a volume at 01:01 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 23, 9:50 PM EDT	TSTM WND DMG	Greenback, TN	POSSIBLE TORNADO REPORTED BY DISPATCH...MUTIPLE POWER LINES AND TREES DOWN ON HWY 95 ALSO DAMAGE TO ROOF OF HOUSE.
Mar 23, 9:50 PM EDT	TORNADO	4 Ne Greenback, TN	EF-3 TORNADO WITH MAXIMUM WINDS OF 140 MPH AND MAXIMUM PATH WIDTH OF 500 YARDS WITH A 4.5 MILE LENGTH.
Mar 23, 9:55 PM EDT	TSTM WND DMG	2 E Greenback, TN	* 1 INJ * POSSIBLE TORNADO...3 STORY HOUSE DESTROYED AND ROOF BLOWN OFF ANOTHER HOUSE.

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 23, 3:45 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.0 hours before the alert went out and 194 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: 239 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

488 
WFUS54 KMRX 240100
TORMRX
TNC009-093-105-123-145-240145-
/O.NEW.KMRX.TO.W.0008.110324T0100Z-110324T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
900 PM EDT WED MAR 23 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  BLOUNT COUNTY IN EAST TENNESSEE...
  KNOX COUNTY IN EAST TENNESSEE...
  LOUDON COUNTY IN EAST TENNESSEE...
  EXTREME NORTHERN MONROE COUNTY IN EAST TENNESSEE...
  ROANE COUNTY IN EAST TENNESSEE...

* UNTIL 945 PM EDT

* AT 856 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A TORNADO 8 MILES SOUTHWEST OF ROCKWOOD. DOPPLER RADAR SHOWED THIS
  TORNADO MOVING EAST AT 50 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  KINGSTON...LOUDON...LENOIR CITY...FARRAGUT...FAIRVIEW...PAINT
  ROCK...BRADBURY...PHILADELPHIA...GREENBACK...FRIENDSVILLE...CLOVER
  HILL AND BEARDEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE AND SOUTHWEST
VIRGINIA.

&&

LAT...LON 3567 8462 3572 8462 3571 8467 3572 8470
      3575 8470 3577 8475 3579 8474 3583 8478
      3589 8471 3594 8428 3591 8426 3595 8426
      3594 8423 3595 8423 3598 8399 3558 8401
TIME...MOT...LOC 0100Z 277DEG 42KT 3578 8470

$$

DH

1 follow-up statement

237 
WWUS54 KMRX 240123
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
923 PM EDT WED MAR 23 2011

TNC009-093-105-123-145-240145-
/O.CON.KMRX.TO.W.0008.000000T0000Z-110324T0145Z/
LOUDON TN-ROANE TN-KNOX TN-BLOUNT TN-MONROE TN-
923 PM EDT WED MAR 23 2011

...A TORNADO WARNING NUMBER 9 REMAINS IN EFFECT UNTIL 945 PM EDT FOR 
EXTREME NORTHERN MONROE...BLOUNT...KNOX...ROANE AND LOUDON 
COUNTIES...

AT 919 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR LOUDON...MOVING
EAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  LOUDON...LENOIR CITY...FARRAGUT...GREENBACK...FRIENDSVILLE...CLOVER
  HILL AND BEARDEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR SOUTHWEST NORTH CAROLINA AND EAST TENNESSEE AND SOUTHWEST 
VIRGINIA.

&&

LAT...LON 3578 8459 3585 8440 3588 8426 3595 8399
      3561 8401 3562 8424 3567 8462 3572 8462
TIME...MOT...LOC 0122Z 277DEG 42KT 3575 8439

$$

GM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 8:18 PM EDT	Areal Flood Advisory	MRX	Campbell, Claiborne, Hancock, Hawkins, Johnson, Sullivan	3 hr
Mar 23, 8:28 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Hancock, Hawkins, Johnson, Sullivan, Washington	62 min
Mar 23, 8:36 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Claiborne, Cocke, Grainger, Greene and 12 more	54 min
Mar 23, 8:40 PM EDT	Tornado Warning	MRX	Bledsoe, Loudon, McMinn, Meigs, Monroe, Polk and 2 more	50 min
Mar 23, 8:54 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Bradley, Hamilton, McMinn, Marion, Meigs and 2 more	66 min
Mar 23, 9:29 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Cocke, Greene, Jefferson, Sevier, Unicoi and 1 more	46 min
Mar 23, 9:41 PM EDT	Tornado Warning	MRX	Blount, Loudon, Monroe, Sevier	49 min
Mar 23, 9:53 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Marion, Meigs, Monroe and 2 more	52 min
Mar 24, 5:45 AM EDT	Freeze Watch	MRX	Carter, Greene, Hancock, Hawkins, Sullivan, Washington	9 hr

Nearby

Tornado Warnings in Tennessee, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.