Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 5, NWS Morristown, TN

February 28, 2011Bradley County, Hamilton County, Tennessee

NWS Morristown, TN issued this tornado warning at Feb 28, 2011, 2:22 PM EST for Bradley County, Hamilton County, Tennessee. It was in force for 38 min. 5 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 28, 2011, 2:22 PM EST (19:22 UTC)
Expired: Feb 28, 2011, 3:00 PM EST
In force: 38 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Bradley County, TN, Hamilton County, TN

The radar

The Northeast Alabama radar (KHTX), 113 km from the middle of the area, began a volume at 19:25 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 28, 2:25 PM EST	TSTM WND DMG	Chattanooga, TN	FEW TREES DOWN NEAR INTERSECTION OF HOOKER AND WILSON ROADS.
Feb 28, 2:30 PM EST	TSTM WND DMG	Red Bank, TN	FEW TREES DOWN ON A HOUSE.
Feb 28, 2:30 PM EST	TORNADO	2 N Red Bank, TN	EF1. MAX WIND SPEED 85 MPH. PATH LENGTH 2.6 MILES. AVERAGE PATH WIDTH 85 TO 100 YARDS WITH A MAXIMUM WIDTH OF 150 YARDS. NUMEROUS TREES DOWN. AT LEAST 10 HOMES WITH DAMAGE.
Feb 28, 2:40 PM EST	TSTM WND DMG	5 Se Cleveland, TN	FEW TREES AND A FLAG POLE DOWN.
Feb 28, 2:45 PM EST	HAIL 1	Cleveland, 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 28, 1:29 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.4 hours before the alert went out and 185 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: 948 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 795 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 404 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

197 
WFUS54 KMRX 281922
TORMRX
TNC011-065-282000-
/O.NEW.KMRX.TO.W.0005.110228T1922Z-110228T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
222 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* TORNADO WARNING FOR...
  BRADLEY COUNTY IN EAST TENNESSEE...
  HAMILTON COUNTY IN EAST TENNESSEE...

* UNTIL 300 PM EST

* AT 220 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES WEST OF
  HARRISON...OR 5 MILES NORTH OF CHATTANOOGA. DOPPLER RADAR SHOWED
  THIS TORNADO MOVING EAST AT 65 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  CLEVELAND...HARRISON...CHARLESTON...EAST BRAINERD...SHADY GROVE...
  OOLTEWAH...COLLEGEDALE...MCDONALD...FLINT SPRINGS...HOPEWELL...
  WATERVILLE...GAP SPRINGS...TASSO AND CALHOUN.

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 800 PM EST MONDAY EVENING FOR
SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE.

&&

LAT...LON 3500 8534 3527 8530 3532 8495 3530 8493
      3532 8490 3533 8481 3528 8472 3527 8475
      3525 8473 3525 8469 3523 8471 3522 8469
      3514 8471 3500 8478
TIME...MOT...LOC 1923Z 264DEG 60KT 3514 8517

$$

1 follow-up statement

437 
WWUS54 KMRX 281937
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
237 PM EST MON FEB 28 2011

TNC011-065-282000-
/O.CON.KMRX.TO.W.0005.000000T0000Z-110228T2000Z/
HAMILTON TN-BRADLEY TN-
237 PM EST MON FEB 28 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM EST FOR BRADLEY
AND HAMILTON COUNTIES...

AT 234 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A POSSIBLE TORNADO.  THIS TORNADIC AREA WAS LOCATED NEAR 
MCDONALD...OR 10 MILES SOUTHWEST OF CLEVELAND...MOVING EAST AT 65 
MPH.

LOCATIONS IN THE WARNING INCLUDE...
  CLEVELAND...CHARLESTON...MCDONALD...HOPEWELL...FLINT SPRINGS...
  WATERVILLE...TASSO AND GAP SPRINGS.

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.



A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST MONDAY EVENING FOR
SOUTHWEST NORTH CAROLINA AND EAST TENNESSEE.

&&

LAT...LON 3500 8534 3527 8530 3532 8495 3530 8493
      3532 8490 3533 8481 3528 8472 3527 8475
      3525 8473 3525 8469 3523 8471 3522 8469
      3514 8471 3500 8478
TIME...MOT...LOC 1935Z 275DEG 55KT 3512 8500

$$

GM

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 8:21 PM EST	Dense Fog Advisory	MRX	Anderson, Blount, Campbell, Carter, Claiborne, Cocke and 17 more	8 hr
Feb 28, 8:38 AM EST	Severe Thunderstorm Warning	MRX	Campbell, Scott	52 min
Feb 28, 9:28 AM EST	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Hancock, Scott, Union	47 min
Feb 28, 10:00 AM EST	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Scott	30 min
Feb 28, 10:15 AM EST	River Flood Warning	MRX	Claiborne, Grainger, Hancock	47 hr
Feb 28, 10:15 AM EST	River Flood Warning	MRX	Sevier	17 hr
Feb 28, 10:15 AM EST	River Flood Warning	MRX	Claiborne, Hancock	27 hr
Feb 28, 10:26 AM EST	Areal Flood Advisory	MRX	Morgan, Scott	3 hr
Feb 28, 10:40 AM EST	Severe Thunderstorm Warning	MRX	Campbell, Claiborne, Hancock, Union	50 min
Feb 28, 10:56 AM EST	Areal Flood Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Scott, Union	6 hr
Feb 28, 11:15 AM EST	Severe Thunderstorm Warning	MRX	Bledsoe, Rhea	45 min
Feb 28, 12:23 PM EST	Severe Thunderstorm Warning	MRX	Anderson, Knox	37 min
Feb 28, 12:48 PM EST	Tornado Warning	MRX	Anderson, Blount, Cocke, Jefferson, Knox, Sevier	42 min
Feb 28, 1:02 PM EST	Areal Flood Warning	MRX	Blount, Cocke, Grainger, Greene, Hamblen, Hancock and 8 more	12 hr
Feb 28, 1:17 PM EST	Tornado Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson and 1 more	25 min
Feb 28, 1:43 PM EST	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Meigs, Rhea, Sequatchie	32 min
Feb 28, 1:48 PM EST	Tornado Warning	MRX	Hamilton, Marion, Sequatchie	42 min
Feb 28, 2:33 PM EST	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Meigs, Monroe, Rhea	42 min
Feb 28, 2:47 PM EST	Tornado Warning	MRX	Bradley, Monroe, Polk	43 min
Feb 28, 3:08 PM EST	Severe Thunderstorm Warning	MRX	Blount, Monroe	37 min
Feb 28, 4:42 PM EST	Areal Flood Warning	MRX	Anderson, Campbell, Claiborne, Grainger, Hancock, Knox 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.