Alert archive / Tennessee / Tornado Warnings in 2017

Tornado Warning 2, NWS Morristown, TN

April 30, 20174 counties in Tennessee

NWS Morristown, TN issued this tornado warning at Apr 30, 2017, 4:44 PM CDT for 4 counties in Tennessee. It was in force for 31 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 30, 2017, 4:44 PM CDT (21:44 UTC)
Expired: Apr 30, 2017, 5:15 PM CDT
In force: 31 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bledsoe County, TN, Hamilton County, TN, Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 69 km from the middle of the area, began a volume at 21:43 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 30, 4:56 PM CDT	TSTM WND DMG	Dunlap, TN	SEVERAL TREES DOWN IN THE SOUTHERN PART OF THE COUNTY, BETWEEN CARTWRIGHT AND DUNLAP.

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 30, 1:36 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.7 hours before the alert went out and 135 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: 329 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

352 
WFUS54 KMRX 302144
TORMRX
TNC007-065-115-153-302215-
/O.NEW.KMRX.TO.W.0002.170430T2144Z-170430T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Morristown TN
544 PM EDT SUN APR 30 2017

The National Weather Service in Morristown has issued a

* Tornado Warning for...
  Sequatchie County in eastern Tennessee...
  Southwestern Bledsoe County in eastern Tennessee...
  Northeastern Marion County in eastern Tennessee...
  North central Hamilton County in eastern Tennessee...

* Until 615 PM EDT/515 PM CDT/
    
* At 543 PM EDT/443 PM CDT/, a severe thunderstorm capable of
  producing a tornado was located near Whitwell, or 8 miles southwest
  of Dunlap, moving northeast at 40 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Dunlap, Soddy-Daisy, Whitwell, Powells Crossroads, Chimneys S.p.,
  Martin Springs, Cartwright, Flat Top Mountain, North Chickamauga
  Creek Gorge, Griffith Creek, Palio, Mowbray Mountain, Lone Oak and
  Sale Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3527 8566 3531 8559 3532 8556 3534 8554
      3534 8553 3536 8551 3552 8524 3529 8509
      3515 8557
TIME...MOT...LOC 2143Z 238DEG 37KT 3527 8546 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

AMP.23

2 follow-up statements

870 
WWUS54 KMRX 302158
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
558 PM EDT SUN APR 30 2017

TNC115-302208-
/O.CAN.KMRX.TO.W.0002.000000T0000Z-170430T2215Z/
Marion TN-
558 PM EDT SUN APR 30 2017

...THE TORNADO WARNING FOR NORTHEASTERN MARION COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 800 PM EDT/700 PM CDT/ for
eastern Tennessee.

LAT...LON 3526 8544 3534 8554 3552 8524 3532 8511
      3522 8540
TIME...MOT...LOC 2158Z 235DEG 36KT 3538 8538 

$$

TNC007-065-153-302215-
/O.CON.KMRX.TO.W.0002.000000T0000Z-170430T2215Z/
Sequatchie TN-Bledsoe TN-Hamilton TN-
558 PM EDT SUN APR 30 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT/515 PM CDT/
FOR CENTRAL SEQUATCHIE...SOUTHWESTERN BLEDSOE AND NORTH CENTRAL
HAMILTON COUNTIES...
    
At 558 PM EDT/458 PM CDT/, a severe thunderstorm capable of producing
a tornado was located over Dunlap, moving northeast at 40 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Dunlap, Soddy-Daisy, Cartwright, Flat Top Mountain, Palio, North
Chickamauga Creek Gorge, Mowbray Mountain and Sale Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3526 8544 3534 8554 3552 8524 3532 8511
      3522 8540
TIME...MOT...LOC 2158Z 235DEG 36KT 3538 8538 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

AMP.23

203 
WWUS54 KMRX 302209
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
609 PM EDT SUN APR 30 2017

TNC007-065-153-302219-
/O.EXP.KMRX.TO.W.0002.000000T0000Z-170430T2215Z/
Sequatchie TN-Bledsoe TN-Hamilton TN-
609 PM EDT SUN APR 30 2017

...THE TORNADO WARNING FOR CENTRAL SEQUATCHIE...SOUTHWESTERN BLEDSOE
AND NORTH CENTRAL HAMILTON COUNTIES WILL EXPIRE AT 615 PM EDT/515 PM
CDT/...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area. 

A tornado watch remains in effect until 800 PM EDT/700 PM CDT/ for 
eastern Tennessee.


LAT...LON 3526 8544 3534 8554 3552 8524 3532 8511
      3522 8540
TIME...MOT...LOC 2209Z 237DEG 37KT 3541 8530 

$$

AMP.23

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 1:47 PM CDT	Wind Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	29 hr
Apr 30, 3:39 PM CDT	Severe Thunderstorm Warning	MRX	Marion	51 min
Apr 30, 4:18 PM CDT	Severe Thunderstorm Warning	MRX	Marion, Sequatchie	27 min
Apr 30, 4:28 PM CDT	Special Weather Statement	MRX	Marion	32 min
Apr 30, 4:52 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Rhea, Sequatchie	23 min
Apr 30, 4:54 PM CDT	Special Weather Statement	MRX	Bledsoe	36 min
Apr 30, 5:06 PM CDT	Special Weather Statement	MRX	Hamilton	24 min
Apr 30, 5:14 PM CDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Meigs, Rhea, Sequatchie	61 min
Apr 30, 5:33 PM CDT	Special Weather Statement	MRX	Meigs	42 min
Apr 30, 6:13 PM CDT	Special Weather Statement	MRX	McMinn, Meigs, Rhea, Roane	47 min
Apr 30, 6:31 PM CDT	Special Weather Statement	MRX	Morgan, Scott	29 min

Nearby

Tornado Warnings in Tennessee, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.