Alert archive / Tennessee / Tornado Warnings in 2017

Tornado Warning 68, NWS Memphis, TN

August 31, 2017Hardeman County, Tennessee

NWS Memphis, TN issued this tornado warning at Aug 31, 2017, 3:29 PM CDT for Hardeman County, Tennessee. It was in force for 16 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
Aug 31, 2017, 3:29 PM CDT (20:29 UTC)
Expired
Aug 31, 2017, 3:45 PM CDT
In force
16 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Hardeman County, TN

The radar

The Memphis radar (KNQA), 90 km from the middle of the area, began a volume at 20:29 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
Aug 31, 11:13 AM CDTTornado WatchSPC11 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 8.5 hours before the alert went out and 111 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 2017-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 2017-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.1939Sfc1 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
20 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
525 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

704 
WFUS54 KMEG 312029
TORMEG
TNC069-312100-
/O.NEW.KMEG.TO.W.0068.170831T2029Z-170831T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
329 PM CDT THU AUG 31 2017

The National Weather Service in Memphis has issued a

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

* Until 400 PM CDT
    
* At 329 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located near Silerton, or 7 miles south of Chickasaw 
  State Forest, moving northwest 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. 

* This dangerous storm will be near...
  Silerton around 335 PM CDT. 
  Chickasaw State Forest around 340 PM CDT. 
  Cloverport around 350 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Toone,
Teague, Hornsby, Pine Top and Shandy.

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 3519 8889 3543 8911 3543 8884 3539 8884
      3536 8881 3524 8879
TIME...MOT...LOC 2029Z 154DEG 34KT 3527 8884 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$
1 follow-up statement
348 
WWUS54 KMEG 312045
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
345 PM CDT THU AUG 31 2017

TNC069-312055-
/O.CAN.KMEG.TO.W.0068.000000T0000Z-170831T2100Z/
Hardeman TN-
345 PM CDT THU AUG 31 2017

...THE TORNADO WARNING FOR NORTHEASTERN HARDEMAN COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and is no longer producing a tornado. Therefore, the warning
has been cancelled.

A tornado watch remains in effect until 800 PM CDT for western
Tennessee.

LAT...LON 3519 8889 3543 8911 3543 8884 3539 8884
      3536 8881 3524 8879
TIME...MOT...LOC 2044Z 154DEG 34KT 3541 8892 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 9:13 PM CDTRiver Flood WarningMEGHardeman62 hr
Aug 31, 8:22 AM CDTFlash Flood WarningMEGDyer, Lauderdale3 hr
Aug 31, 12:01 PM CDTTornado WarningMEGFayette44 min
Aug 31, 12:03 PM CDTTornado WarningMEGFayette, Hardeman42 min
Aug 31, 12:43 PM CDTTornado WarningMEGFayette, Hardeman47 min
Aug 31, 12:49 PM CDTTornado WarningMEGShelby41 min
Aug 31, 1:24 PM CDTFlash Flood WarningMEGShelby3 hr
Aug 31, 1:49 PM CDTTornado WarningMEGFayette, Hardeman41 min
Aug 31, 2:36 PM CDTFlash Flood WarningMEGFayette, Hardeman9 hr
Aug 31, 2:47 PM CDTTornado WarningMEGHardin, McNairy43 min
Aug 31, 3:08 PM CDTFlash Flood WarningMEGShelby9 hr
Aug 31, 3:10 PM CDTTornado Warning Tornado observedMEGHardin, McNairy32 min
Aug 31, 3:23 PM CDTTornado WarningMEGDecatur52 min
Aug 31, 3:26 PM CDTTornado WarningMEGChester, McNairy25 min
Aug 31, 4:43 PM CDTFlash Flood WarningMEGShelby6 hr
Aug 31, 5:21 PM CDTFlash Flood WarningMEGChester, Fayette, Hardeman, Hardin, Haywood, Henderson and 3 more6 hr
Aug 31, 6:08 PM CDTFlash Flood WarningMEGBenton, Carroll, Chester, Decatur, Hardin, Henderson and 1 more6 hr

Nearby

Tornado Warnings in Tennessee, 2017Every tornado warning in 2017Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.