Alert archive / Tennessee / Tornado Warnings in 2007

Tornado Warning 9, NWS Nashville, TN

October 18, 2007Benton County, Humphreys County, Tennessee

NWS Nashville, TN issued this tornado warning at Oct 18, 2007, 9:56 PM CDT for Benton County, Humphreys County, Tennessee. It was in force for 34 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: Oct 18, 2007, 9:56 PM CDT (02:56 UTC)
Expired: Oct 18, 2007, 10:30 PM CDT
In force: 34 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Benton County, TN, Humphreys County, TN

What was reported inside it

Time	Report	Where	Remark
Oct 18, 10:20 PM CDT	TSTM WND DMG	Mcewen, TN	911 DISPATCHER REPORTED A TREE DOWN.

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
Oct 18, 1:31 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.9 hours before the alert went out and 104 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: 1487 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KOHX 190258
TOROHX
TNC005-085-190330-
/O.NEW.KOHX.TO.W.0009.071019T0256Z-071019T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
956 PM CDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN BENTON COUNTY IN TENNESSEE...
  HUMPHREYS COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF WAVERLY...

* UNTIL 1030 PM CDT

* AT 955 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 20 MILES
  SOUTHWEST OF WAVERLY...OR ABOUT 15 MILES SOUTH OF CAMDEN...MOVING
  NORTHEAST AT 40 MPH.

* THE TORNADO WILL BE...
  8 MILES SOUTH OF MCEWEN BY 1030 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3619 8756 3608 8753 3604 8756 3600 8753
      3595 8757 3595 8762 3582 8790 3584 8795
      3580 8799 3584 8809 3592 8815 3621 8759
TIME...MOT...LOC 0256Z 247DEG 36KT 3587 8800

$$
BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 18, 8:08 PM CDT	Tornado Warning	OHX	Stewart	37 min
Oct 18, 8:48 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Stewart	57 min
Oct 18, 9:17 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Stewart	43 min
Oct 18, 10:19 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Humphreys, Lawrence and 8 more	56 min
Oct 18, 11:10 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Hickman, Macon, Maury, Robertson and 5 more	50 min
Oct 18, 11:19 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Hickman, Lawrence, Lewis, Maury, Perry and 1 more	56 min
Oct 18, 11:51 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Clay, Davidson, DeKalb, Jackson, Macon and 6 more	54 min
Oct 19, 12:03 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury	27 min
Oct 19, 12:35 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Grundy, Rutherford, Warren	40 min
Oct 19, 12:39 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, Clay, DeKalb, Fentress, Jackson, Overton and 7 more	51 min
Oct 19, 1:22 AM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	38 min
Oct 19, 1:34 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam, Van Buren and 1 more	41 min

Nearby

Tornado Warnings in Tennessee, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.