Alert archive / Tennessee / Tornado Warnings in 2011
Tornado Warning 18, NWS Morristown, TN
NWS Morristown, TN issued this tornado warning at Apr 9, 2011, 8:39 PM EDT for Cocke County, Tennessee. It was in force for 24 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 9, 2011, 8:39 PM EDT (00:39 UTC)
- Expired
- Apr 9, 2011, 9:03 PM EDT
- In force
- 24 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
County Cocke County, TN
The radar
The Knoxville radar (KMRX), 44 km from the middle of the area, began a volume at 00:42 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 9, 8:45 PM EDT | TSTM WND DMG | Cosby, TN | FEW TREES DOWN IN COSBY...DEL RIO AND GRASSY FORK...REPORTED BY DISPATCH. |
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 9, 2:00 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.7 hours before the alert went out and 285 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 317 m²/s²
- 0-3 km storm-relative helicity
- 506 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
609
WFUS54 KMRX 100039
TORMRX
TNC029-100115-
/O.NEW.KMRX.TO.W.0018.110410T0039Z-110410T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
839 PM EDT SAT APR 9 2011
THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A
* TORNADO WARNING FOR...
COCKE COUNTY IN EAST TENNESSEE...
* UNTIL 915 PM EDT
* AT 834 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
PARROTTSVILLE...OR NEAR NEWPORT. DOPPLER RADAR SHOWED THIS TORNADO
MOVING SOUTHEAST AT 45 MPH.
* THIS TORNADIC STORM WILL AFFECT MAINLY RURAL AREAS OF COCKE
COUNTY...INCLUDING THE FOLLOWING LOCATIONS DEL RIO AND ROUND
MOUNTAIN.
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 900 PM EDT SATURDAY EVENING
FOR SOUTHWEST NORTH CAROLINA AND EAST TENNESSEE AND SOUTHWEST
VIRGINIA.
&&
LAT...LON 3592 8330 3596 8329 3611 8311 3608 8304
3594 8289 3592 8291 3587 8289 3586 8291
3584 8291 3579 8295 3577 8299 3578 8308
3572 8322
TIME...MOT...LOC 0039Z 305DEG 38KT 3598 8308
$$
172 follow-up statements
975
WWUS54 KMRX 100053
SVSMRX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
853 PM EDT SAT APR 9 2011
TNC029-100115-
/O.CON.KMRX.TO.W.0018.000000T0000Z-110410T0115Z/
COCKE TN-
853 PM EDT SAT APR 9 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR COCKE
COUNTY...
AT 851 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR DEL RIO...OR 14
MILES EAST OF NEWPORT...MOVING SOUTHEAST AT 45 MPH.
* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF COCKE
COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE AND SOUTHWEST
VIRGINIA.
&&
LAT...LON 3592 8330 3596 8329 3611 8311 3608 8304
3594 8289 3592 8291 3587 8289 3586 8291
3584 8291 3579 8295 3577 8299 3578 8308
3572 8322
TIME...MOT...LOC 0053Z 305DEG 38KT 3589 8293
$$
17368
WWUS54 KMRX 100103
SVSMRX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
903 PM EDT SAT APR 9 2011
TNC029-100113-
/O.CAN.KMRX.TO.W.0018.000000T0000Z-110410T0115Z/
COCKE TN-
903 PM EDT SAT APR 9 2011
...THE TORNADO WARNING FOR COCKE COUNTY IS CANCELLED...
THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LEVELS. THEREFORE...THE WARNING HAS BEEN CANCELLED.
LAT...LON 3592 8330 3596 8329 3611 8311 3608 8304
3594 8289 3592 8291 3587 8289 3586 8291
3584 8291 3579 8295 3577 8299 3578 8308
3572 8322
TIME...MOT...LOC 0103Z 305DEG 38KT 3583 8282
$$
17The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 8:15 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Jefferson | 45 min |
Nearby
Tornado Warnings in Tennessee, 2011Every tornado warning in 2011Tornadoes 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.