Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 61, NWS Morristown, TN

April 27, 2011McMinn County, Polk County, Tennessee

NWS Morristown, TN issued this tornado warning at Apr 27, 2011, 8:42 PM EDT for McMinn County, Polk County, Tennessee. It was in force for 47 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: Apr 27, 2011, 8:42 PM EDT (00:42 UTC)
Expired: Apr 27, 2011, 9:29 PM EDT
In force: 47 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties McMinn County, TN, Polk County, TN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 27, 4:36 PM EDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.7 hours before the alert went out and 201 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: 308 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 104 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

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

483 
WFUS54 KMRX 280042
TORMRX
TNC107-139-280145-
/O.NEW.KMRX.TO.W.0061.110428T0042Z-110428T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
842 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  MCMINN COUNTY IN EAST TENNESSEE...
  POLK COUNTY IN EAST TENNESSEE...

* UNTIL 945 PM EDT

* AT 836 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  SOUTHWEST OF BENTON. DOPPLER RADAR SHOWED THIS TORNADO MOVING
  NORTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  BENTON...DUCKTOWN...PARKSVILLE...CALHOUN...BIG FROG MOUNTAIN...
  RELIANCE...ARCHVILLE...DENTVILLE...COPPERHILL AND TURTLETOWN.

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 100 AM EDT THURSDAY MORNING
FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE. A TORNADO WATCH
ALSO REMAINS IN EFFECT UNTIL 100 AM EDT THURSDAY MORNING FOR
SOUTHWEST VIRGINIA.

&&

LAT...LON 3499 8477 3510 8474 3516 8470 3524 8472
      3525 8470 3526 8474 3527 8475 3527 8473
      3529 8472 3529 8475 3531 8478 3537 8477
      3523 8436 3498 8435
TIME...MOT...LOC 0042Z 245DEG 29KT 3513 8470

$$

MJB

2 follow-up statements

526 
WWUS54 KMRX 280111
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
911 PM EDT WED APR 27 2011

TNC107-139-280145-
/O.CON.KMRX.TO.W.0061.000000T0000Z-110428T0145Z/
MCMINN TN-POLK TN-
911 PM EDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR POLK AND
MCMINN COUNTIES...

AT 906 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR RELIANCE...OR 6
MILES NORTHEAST OF BENTON...MOVING EAST AT 40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MAINLY RURAL AREAS OF POLK COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL OR LARGER AND DESTRUCTIVE STRAIGHT LINE WINDS.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

IF IN MOBILE HOMES OR VEHICLES...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.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EDT THURSDAY MORNING 
FOR SOUTHWEST NORTH CAROLINA AND EASTERN TENNESSEE.

&&

LAT...LON 3510 8472 3516 8470 3522 8470 3524 8472
      3525 8470 3526 8474 3527 8475 3527 8473
      3529 8472 3531 8478 3537 8477 3523 8436
      3509 8456
TIME...MOT...LOC 0111Z 257DEG 36KT 3523 8450

$$

TD

993 
WWUS54 KMRX 280129
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
929 PM EDT WED APR 27 2011

TNC107-139-280139-
/O.CAN.KMRX.TO.W.0061.000000T0000Z-110428T0145Z/
MCMINN TN-POLK TN-
929 PM EDT WED APR 27 2011

...THE TORNADO WARNING FOR POLK AND MCMINN COUNTIES IS CANCELLED...

THE STORMS THAT PROMPTED THE WARNING HAVE EXITED THE WARNED AREA.
THEREFORE...THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EDT THURSDAY MORNING
FOR SOUTHWEST NORTH CAROLINA AND EASTERN TENNESSEE.

LAT...LON 3510 8472 3516 8470 3522 8470 3524 8472
      3525 8470 3526 8474 3527 8475 3527 8473
      3529 8472 3531 8478 3537 8477 3523 8436
      3509 8456
TIME...MOT...LOC 0129Z 257DEG 36KT 3527 8428

$$

TD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 8:07 PM EDT	Tornado Warning	MRX	Anderson, Jefferson, Knox, Loudon, McMinn, Meigs and 3 more	53 min
Apr 27, 8:10 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Claiborne, Morgan, Roane, Scott, Union	65 min
Apr 27, 8:10 PM EDT	Tornado Warning	MRX	Bradley, Hamilton	65 min
Apr 27, 8:26 PM EDT	Flash Flood Warning	MRX	Anderson, Knox, Loudon, Meigs, Rhea, Roane	3 hr
Apr 27, 8:29 PM EDT	Tornado Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson and 2 more	61 min
Apr 27, 8:29 PM EDT	Tornado Warning	MRX	Marion	61 min
Apr 27, 8:48 PM EDT	Tornado Warning	MRX	Blount, Knox	27 min
Apr 27, 8:53 PM EDT	Tornado Warning	MRX	Bradley, McMinn	34 min
Apr 27, 8:54 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan, Washington	66 min
Apr 27, 9:00 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Grainger, Hancock, Union	45 min
Apr 27, 9:08 PM EDT	Tornado Warning	MRX	Bledsoe, Hamilton, Rhea, Sequatchie	52 min
Apr 27, 9:15 PM EDT	Severe Thunderstorm Warning	MRX	Campbell, Morgan, Scott	45 min
Apr 27, 9:17 PM EDT	Tornado Warning	MRX	Blount, Loudon, McMinn, Monroe	43 min
Apr 27, 9:18 PM EDT	Tornado Warning	MRX	Hawkins, Sullivan, Washington	42 min
Apr 27, 9:26 PM EDT	Tornado Warning	MRX	Cocke, Greene, Hamblen, Hawkins, Jefferson, Sevier and 2 more	64 min
Apr 27, 9:37 PM EDT	Severe Thunderstorm Warning	MRX	Hancock, Hawkins	53 min
Apr 27, 9:40 PM EDT	Tornado Warning	MRX	Meigs, Rhea, Roane	50 min
Apr 27, 9:50 PM EDT	Tornado Warning	MRX	Johnson, Sullivan	55 min
Apr 27, 9:53 PM EDT	Tornado Warning	MRX	Bradley, Hamilton, McMinn, Rhea	25 min
Apr 27, 9:58 PM EDT	Tornado Warning	MRX	Blount, Cocke, Jefferson, Sevier	62 min
Apr 27, 10:03 PM EDT	Areal Flood Warning	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Hamilton and 14 more	8 hr
Apr 27, 10:05 PM EDT	Tornado Warning	MRX	Anderson, Campbell, Claiborne, Loudon, Morgan, Scott and 1 more	40 min
Apr 27, 10:14 PM EDT	Tornado Warning	MRX	Blount, Bradley, Loudon, McMinn, Meigs, Monroe and 2 more	46 min
Apr 27, 10:24 PM EDT	Tornado Warning	MRX	Knox	51 min
Apr 27, 10:41 PM EDT	Tornado Warning	MRX	Carter, Johnson, Sullivan	64 min
Apr 27, 10:46 PM EDT	Tornado Warning	MRX	Claiborne, Grainger, Hamblen, Hancock, Hawkins, Union	59 min
Apr 27, 10:49 PM EDT	Tornado Warning	MRX	Blount, Knox, Loudon, Monroe, Sevier	26 min
Apr 27, 10:50 PM EDT	Tornado Warning	MRX	Greene, Unicoi, Washington	40 min
Apr 27, 10:52 PM EDT	Tornado Warning	MRX	Blount, Loudon, McMinn, Monroe, Polk	23 min
Apr 27, 10:57 PM EDT	Tornado Warning	MRX	Blount, Cocke, Jefferson, Sevier	63 min
Apr 27, 11:10 PM EDT	Tornado Warning	MRX	Carter, Johnson	65 min
Apr 27, 11:13 PM EDT	Tornado Warning	MRX	Blount, Knox, Loudon, Monroe	47 min
Apr 27, 11:21 PM EDT	Tornado Warning	MRX	Blount, Jefferson, Knox, Sevier	24 min
Apr 27, 11:27 PM EDT	Tornado Warning	MRX	Cocke, Greene, Jefferson, Sevier	63 min
Apr 28, 12:19 AM EDT	Severe Thunderstorm Warning	MRX	Carter, Greene, Johnson, Sullivan, Unicoi, Washington	56 min
Apr 28, 12:26 AM EDT	Severe Thunderstorm Warning	MRX	Greene	49 min
Apr 28, 12:40 AM EDT	Tornado Warning	MRX	Carter, Greene, Unicoi, Washington	31 min
Apr 28, 12:51 AM EDT	Tornado Warning	MRX	Johnson, Sullivan	39 min
Apr 28, 12:59 AM EDT	River Flood Warning	MRX	Bledsoe, Marion, Sequatchie	51 hr
Apr 28, 1:29 AM EDT	Areal Flood Advisory	MRX	Carter, Cocke, Greene, Hamblen, Hancock, Hawkins and 4 more	3 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; the sounding from the Mesonet's radiosonde archive.