Alert archive / Tennessee / Tornado Warnings in 2017

Tornado Warning 35, NWS Nashville, TN

August 31, 2017Lawrence County, Lewis County, Maury County, Tennessee

NWS Nashville, TN issued this tornado warning at Aug 31, 2017, 4:43 PM CDT for Lawrence County, Lewis County, Maury County, Tennessee. It was in force for 32 min. 3 reports 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: Aug 31, 2017, 4:43 PM CDT (21:43 UTC)
Expired: Aug 31, 2017, 5:15 PM CDT
In force: 32 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Lawrence County, TN, Lewis County, TN, Maury County, TN

The radar

The Nashville radar (KOHX), 107 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
Aug 31, 5:11 PM CDT	TORNADO	2 W Mount Pleasant, TN	NWS STORM SURVEY FOUND AN EF0 TORNADO. PATH LENGTH WAS 1.5 MILES...WIDTH 50 YARDS. PEAK WIND 75 MPH. SEVERAL TREES AND POWER POLES WERE KNOCKED DOWN AND TWO BARNS LOST THEIR ROOFS.
Aug 31, 5:15 PM CDT	TORNADO	3 Nw Mount Pleasant, TN	7 POWER POLES DOWN ALONG WITH TREES. TDS OBSERVED ON RADAR AT TIME OF REPORT.
Aug 31, 5:20 PM CDT	TORNADO	2 W Mount Pleasant, TN	NWS STORM SURVEY FOUND AN EF0 TORNADO. PATH LENGTH WAS 1.5 MILES...WIDTH 50 YARDS. PEAK WIND 75 MPH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.7 hours before the alert went out and 95 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.

988 
WFUS54 KOHX 312143
TOROHX
TNC099-101-119-312215-
/O.NEW.KOHX.TO.W.0035.170831T2143Z-170831T2215Z/

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

The National Weather Service in Nashville has issued a

* Tornado Warning for...
  East central Lewis County in Middle Tennessee...
  Southwestern Maury County in Middle Tennessee...
  Northeastern Lawrence County in Middle Tennessee...

* Until 515 PM CDT
    
* At 442 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Summertown, or 12 miles northeast of Lawrenceburg,
  moving north 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 dangerous storm will be near...
  Mount Pleasant around 505 PM CDT. 

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 3556 8738 3559 8720 3543 8719 3543 8721
      3539 8721 3539 8722 3538 8726
TIME...MOT...LOC 2142Z 167DEG 24KT 3541 8724 

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

$$

Whitehead

1 follow-up statement

441 
WWUS54 KOHX 312207
SVSOHX

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

TNC099-312216-
/O.CAN.KOHX.TO.W.0035.000000T0000Z-170831T2215Z/
Lawrence TN-
507 PM CDT THU AUG 31 2017

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

LAT...LON 3544 8729 3545 8730 3556 8738 3559 8720
      3543 8719 3543 8720 3544 8723 3543 8723
TIME...MOT...LOC 2206Z 146DEG 28KT 3549 8721 

$$

TNC101-119-312215-
/O.CON.KOHX.TO.W.0035.000000T0000Z-170831T2215Z/
Lewis TN-Maury TN-
507 PM CDT THU AUG 31 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR EAST
CENTRAL LEWIS AND SOUTHWESTERN MAURY COUNTIES...
    
At 506 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Mount Pleasant, or 12 miles southwest of Columbia,
moving northwest 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 dangerous storm will be near...
  Mount Pleasant around 515 PM CDT. 

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 3544 8729 3545 8730 3556 8738 3559 8720
      3543 8719 3543 8720 3544 8723 3543 8723
TIME...MOT...LOC 2206Z 146DEG 28KT 3549 8721 

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, 4:26 PM CDT	Tornado Warning	OHX	Perry	19 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.