Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 79, NWS Morristown, TN

April 27, 2011Greene County, Unicoi County, Washington County, Tennessee

NWS Morristown, TN issued this tornado warning at Apr 27, 2011, 10:50 PM EDT for Greene County, Unicoi County, Washington County, Tennessee. It was in force for 40 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: Apr 27, 2011, 10:50 PM EDT (02:50 UTC)
Expired: Apr 27, 2011, 11:30 PM EDT
In force: 40 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Greene County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 79 km from the middle of the area, began a volume at 02:51 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, 10:56 PM EDT	TORNADO	Camp Creek, TN	* 5 FATAL * POSSIBLE TORNADO NEAR CAMP CREEK WHICH CAUSED SIGNIFICANT STRUCTURAL DAMAGE AND SEVERAL FATALITIES AND NUMEROUS INJURIES.
Apr 27, 11:03 PM EDT	TORNADO	5 E Tusculum, TN	EF3. NEAR HORSE CREEK. MAX WIND SPEED OF 150 MPH.

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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.8 hours before the alert went out and 236 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: 2272 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 233 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 14.4

Open this sounding in Storm Lab

The text

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

721 
WFUS54 KMRX 280250
TORMRX
TNC059-171-179-280330-
/O.NEW.KMRX.TO.W.0079.110428T0250Z-110428T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1050 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  GREENE COUNTY IN EAST TENNESSEE...
  UNICOI COUNTY IN EAST TENNESSEE...
  WASHINGTON COUNTY IN EAST TENNESSEE...

* UNTIL 1130 PM EDT

* AT 1047 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  NORTHWEST OF HOT SPRINGS...OR 13 MILES SOUTH OF GREENEVILLE.
  DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT 70 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  GREENEVILLE...ERWIN...JOHNSON CITY...TUSCULUM...BANNER HILL...
  JONESBOROUGH...CAMP CREEK...ROCKY FORK...CHUCKY...LIBERTY...
  LIMESTONE...EMBREEVILLE...LEESBURG...AVONDALE...UNICOI AND
  LIMESTONE COVE.


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 NORTHEAST TENNESSEE.

&&

LAT...LON 3612 8225 3610 8237 3599 8247 3596 8261
      3603 8260 3606 8263 3604 8268 3599 8278
      3592 8281 3594 8289 3611 8306 3644 8241
      3635 8230 3626 8234 3623 8226 3616 8222
TIME...MOT...LOC 0250Z 236DEG 59KT 3602 8285

$$

DMG

1 follow-up statement

138 
WWUS54 KMRX 280306
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1106 PM EDT WED APR 27 2011

TNC059-171-179-280330-
/O.CON.KMRX.TO.W.0079.000000T0000Z-110428T0330Z/
UNICOI TN-WASHINGTON TN-GREENE TN-
1106 PM EDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT FOR
GREENE...WASHINGTON AND UNICOI COUNTIES...

AT 1105 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR LIBERTY...OR 10
MILES WEST OF ERWIN...MOVING NORTHEAST AT 65 MPH.

THE TORNADO WILL BE NEAR...
  JONESBOROUGH AND ERWIN AROUND 1115 PM EDT.
  JOHNSON CITY AROUND 1120 PM EDT.

OTHER LOCATIONS AFFECTED BY THIS SEVERE THUNDERSTORM INCLUDE
EMBREEVILLE...LEESBURG...AVONDALE AND UNICOI.

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.

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.

&&

LAT...LON 3612 8225 3610 8237 3599 8247 3596 8261
      3603 8260 3606 8263 3604 8268 3599 8278
      3592 8281 3594 8289 3611 8306 3644 8241
      3635 8230 3626 8234 3623 8226 3616 8222
TIME...MOT...LOC 0306Z 235DEG 57KT 3616 8258

$$

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, 8:42 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, 10:52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.