Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 83, NWS Morristown, TN

April 27, 20114 counties in Tennessee

NWS Morristown, TN issued this tornado warning at Apr 27, 2011, 11:13 PM EDT for 4 counties in Tennessee. It was in force for 47 min. 1 report 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: Apr 27, 2011, 11:13 PM EDT (03:13 UTC)
Expired: Apr 28, 2011, 12:00 AM EDT
In force: 47 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

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

The radar

The Knoxville radar (KMRX), 93 km from the middle of the area, began a volume at 03:14 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
Apr 27, 11:45 PM EDT	HAIL 1.25	Townsend, 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
Apr 27, 4:36 PM EDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.2 hours before the alert went out and 240 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: 1215 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1433 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 408 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 15.2

Open this sounding in Storm Lab

The text

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

383 
WFUS54 KMRX 280313
TORMRX
TNC009-093-105-123-280400-
/O.NEW.KMRX.TO.W.0083.110428T0313Z-110428T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1113 PM EDT WED APR 27 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...
  MONROE COUNTY IN EAST TENNESSEE...

* UNTIL MIDNIGHT EDT

* AT 1106 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES
  SOUTHEAST OF MADISONVILLE. DOPPLER RADAR SHOWED THIS TORNADO MOVING
  NORTHEAST AT 60 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  MARYVILLE...ALCOA...EAGLETON VILLAGE...VONORE...CITICO BEACH...
  GREENBACK...TALASSEE...CLOVER HILL...HAPPY VALLEY...CADES COVE...
  WALLAND...TOWNSEND AND WILDWOOD.

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 3543 8444 3595 8391 3576 8372 3571 8371
      3571 8368 3557 8366 3556 8376 3552 8383
      3552 8387 3547 8392 3545 8397 3541 8401
      3530 8402 3524 8418 3527 8423 3521 8430
      3521 8433
TIME...MOT...LOC 0313Z 229DEG 59KT 3546 8414

$$
17

2 follow-up statements

132 
WWUS54 KMRX 280322
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1122 PM EDT WED APR 27 2011

TNC009-093-105-123-280400-
/O.CON.KMRX.TO.W.0083.000000T0000Z-110428T0400Z/
LOUDON TN-KNOX TN-MONROE TN-BLOUNT TN-
1122 PM EDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR
BLOUNT...MONROE...KNOX AND LOUDON COUNTIES...

AT 1119 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR TARIFFVILLE...OR
13 MILES EAST OF MADISONVILLE...MOVING NORTHEAST AT 65 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MARYVILLE...ALCOA...EAGLETON VILLAGE...GREENBACK...TALASSEE...
  CLOVER HILL...HAPPY VALLEY...CADES COVE...WALLAND...WILDWOOD AND
  TOWNSEND.

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 EAST CENTRAL TENNESSEE.

&&

LAT...LON 3553 8432 3595 8391 3576 8372 3571 8371
      3571 8368 3569 8368 3557 8366 3556 8376
      3552 8387 3547 8392 3545 8397 3541 8401
      3533 8403
TIME...MOT...LOC 0322Z 232DEG 56KT 3551 8410

$$

286 
WWUS54 KMRX 280326
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1126 PM EDT WED APR 27 2011

TNC009-093-105-123-280400-
/O.CON.KMRX.TO.W.0083.000000T0000Z-110428T0400Z/
LOUDON TN-KNOX TN-MONROE TN-BLOUNT TN-
1126 PM EDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR
BLOUNT...MONROE...KNOX AND LOUDON COUNTIES...

AT 1123 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR TALASSEE...OR 17
MILES SOUTH OF MARYVILLE...MOVING NORTHEAST AT 80 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MARYVILLE...ALCOA...EAGLETON VILLAGE...CLOVER HILL...HAPPY
  VALLEY...CADES COVE...WALLAND...TOWNSEND AND WILDWOOD.

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 3553 8432 3595 8391 3576 8372 3571 8371
      3571 8368 3569 8368 3557 8366 3556 8376
      3552 8387 3547 8392 3545 8397 3541 8401
      3533 8403
TIME...MOT...LOC 0326Z 231DEG 69KT 3554 8399

$$

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, 8:42 PM EDT	Tornado Warning	MRX	McMinn, Polk	47 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, 11:21 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.