Alert archive / Tennessee / Tornado Warnings in 2017

Tornado Warning 34, NWS Nashville, TN

August 31, 2017Perry County, Tennessee

NWS Nashville, TN issued this tornado warning at Aug 31, 2017, 4:26 PM CDT for Perry County, Tennessee. It was in force for 19 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, 4:26 PM CDT (21:26 UTC)
Expired: Aug 31, 2017, 4:45 PM CDT
In force: 19 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Perry County, TN

The radar

The Nashville radar (KOHX), 125 km from the middle of the area, began a volume at 21:29 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 hours before the alert went out and 116 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: 198 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 462 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

260 
WFUS54 KOHX 312126
TOROHX
TNC135-312145-
/O.NEW.KOHX.TO.W.0034.170831T2126Z-170831T2145Z/

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

The National Weather Service in Nashville has issued a

* Tornado Warning for...
  East central Perry County in Middle Tennessee...

* Until 445 PM CDT
    
* At 426 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Linden, moving northwest at 20 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...
  Linden around 440 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Lobelville.

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 3573 8772 3570 8771 3570 8774 3566 8774
      3564 8770 3556 8768 3554 8770 3552 8775
      3567 8792
TIME...MOT...LOC 2126Z 152DEG 19KT 3557 8774 

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

$$

Whitehead

1 follow-up statement

252 
WWUS54 KOHX 312138
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
438 PM CDT THU AUG 31 2017

TNC135-312145-
/O.CON.KOHX.TO.W.0034.000000T0000Z-170831T2145Z/
Perry TN-
438 PM CDT THU AUG 31 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR CENTRAL
PERRY COUNTY...
    
At 438 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Linden, moving northwest at 15 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
central Perry County, including the following locations: Lobelville.

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 3573 8772 3570 8771 3570 8774 3566 8774
      3563 8773 3559 8771 3557 8772 3555 8778
      3567 8792
TIME...MOT...LOC 2138Z 136DEG 15KT 3561 8779 

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

$$

Whitehead

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 4:24 PM CDT	Tornado Warning	OHX	Lawrence, Wayne	21 min
Aug 31, 4:43 PM CDT	Tornado Warning	OHX	Lawrence, Lewis, Maury	32 min
Aug 31, 5:13 PM CDT	Tornado Warning	OHX	Lewis, Maury	32 min
Aug 31, 5:44 PM CDT	Tornado Warning	OHX	Hickman, Lewis, Maury	31 min
Aug 31, 5:57 PM CDT	Tornado Warning	OHX	Davidson	33 min
Aug 31, 6:17 PM CDT	Areal Flood Advisory	OHX	Davidson	118 min
Aug 31, 6:37 PM CDT	Flash Flood Warning	OHX	Davidson, Robertson	7 hr
Aug 31, 6:44 PM CDT	Tornado Warning	OHX	Davidson, Robertson	16 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.