Alert archive / Tennessee / Tornado Warnings in 2016

Tornado Warning 19, NWS Memphis, TN

December 17, 2016Lake County, Tennessee

NWS Memphis, TN issued this tornado warning at Dec 17, 2016, 3:08 PM CST for Lake County, Tennessee. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Dec 17, 2016, 3:08 PM CST (21:08 UTC)
Expired
Dec 17, 2016, 3:22 PM CST
In force
14 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Lake County, TN

The radar

The Paducah radar (KPAH), 92 km from the middle of the area, began a volume at 21:08 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Dec 17, 1:42 PM CSTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 9.1 hours before the alert went out and 186 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2016-12-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2016-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 320 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
200 J/kg
Mixed-layer CIN
-240 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
320 m²/s²
0-3 km storm-relative helicity
327 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

716 
WFUS54 KMEG 172108
TORMEG
TNC095-172145-
/O.NEW.KMEG.TO.W.0019.161217T2108Z-161217T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
308 PM CST SAT DEC 17 2016

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Northeastern Lake County in western Tennessee...

* Until 345 PM CST
    
* At 308 PM CST, a severe thunderstorm producing a tornado was
  located near Marston, or 8 miles east of Portageville, moving east
  at 30 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. 

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Lake County, including the following locations: Cates,
  Bessie, New Markham, Wright and Cronanville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter 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 3643 8937 3640 8952 3642 8954 3644 8954
      3646 8952 3648 8952 3650 8954 3650 8949
      3647 8949 3646 8948 3646 8946 3650 8942
      3650 8935
TIME...MOT...LOC 2108Z 251DEG 25KT 3646 8956 

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

$$
2 follow-up statements
200 
WFUS54 KMEG 172110 CCA
TORMEG
TNC095-172145-
/O.COR.KMEG.TO.W.0019.161217T2108Z-161217T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
310 PM CST SAT DEC 17 2016

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Northeastern Lake County in western Tennessee...

* Until 345 PM CST
    
* At 310 PM CST, a severe thunderstorm producing a tornado was
  located near Marston, or near Portageville, moving east at 30 mph.

  HAZARD...Tornado and ping pong ball size hail. 

  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...
  Cates, Bessie, New Markham, Wright and Cronanville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter 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 3643 8937 3640 8952 3642 8954 3644 8954
      3646 8952 3648 8952 3650 8954 3650 8949
      3647 8949 3646 8948 3646 8946 3650 8942
      3650 8935
TIME...MOT...LOC 2110Z 251DEG 25KT 3646 8956 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$
131 
WWUS54 KMEG 172122
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
322 PM CST SAT DEC 17 2016

TNC095-172131-
/O.CAN.KMEG.TO.W.0019.000000T0000Z-161217T2145Z/
Lake TN-
322 PM CST SAT DEC 17 2016

...THE TORNADO WARNING FOR NORTHEASTERN LAKE COUNTY IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A tornado watch remains in effect until 900 PM CST for western
Tennessee.

LAT...LON 3643 8937 3640 8952 3642 8954 3644 8954
      3646 8952 3648 8952 3650 8954 3650 8949
      3647 8949 3646 8948 3646 8946 3650 8942
      3650 8935
TIME...MOT...LOC 2119Z 251DEG 25KT 3649 8946 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 12:16 PM CSTWinter Weather AdvisoryMEGBenton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more18 hr
Dec 17, 3:05 PM CSTSpecial Weather StatementMEGLake25 min
Dec 17, 4:16 PM CSTSevere Thunderstorm WarningMEGHardeman13 min
Dec 17, 4:20 PM CSTTornado Warning Tornado observedMEGHardeman8 min
Dec 17, 4:37 PM CSTSevere Thunderstorm WarningMEGChester, Henderson, Madison21 min
Dec 17, 5:04 PM CSTSevere Thunderstorm WarningMEGLake, Obion41 min
Dec 17, 5:27 PM CSTSevere Thunderstorm WarningMEGLauderdale48 min
Dec 17, 5:51 PM CSTSevere Thunderstorm WarningMEGDyer, Lauderdale39 min

Nearby

Tornado Warnings in Tennessee, 2016Every tornado warning in 2016Tornadoes in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.