Alert archive / Tennessee / Tornado Warnings in 2009

Tornado Warning 89, NWS Nashville, TN

June 17, 2009Davidson County, Robertson County, Sumner County, Tennessee

NWS Nashville, TN issued this tornado warning at Jun 17, 2009, 7:12 PM CDT for Davidson County, Robertson County, Sumner County, Tennessee. It was in force for 33 min. 2 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: Jun 17, 2009, 7:12 PM CDT (00:12 UTC)
Expired: Jun 17, 2009, 7:45 PM CDT
In force: 33 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Robertson County, TN, Sumner County, TN

The radar

The Nashville radar (KOHX), 35 km from the middle of the area, began a volume at 00:12 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
Jun 17, 7:20 PM CDT	HAIL 0.75	Greenbrier, TN
Jun 17, 7:34 PM CDT	FUNNEL CLOUD	8 Nnw Nashville, TN	FUNNEL OBSERVED AT JOELTON

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
Jun 17, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.2 hours before the alert went out and 40 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: 3707 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOHX 180012
TOROHX
TNC037-147-165-180045-
/O.NEW.KOHX.TO.W.0089.090618T0012Z-090618T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
712 PM CDT WED JUN 17 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL DAVIDSON COUNTY IN MIDDLE TENNESSEE...
  SOUTHERN ROBERTSON COUNTY IN MIDDLE TENNESSEE...
  EXTREME WEST CENTRAL SUMNER COUNTY IN MIDDLE TENNESSEE...

* UNTIL 745 PM CDT

* AT 710 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD   
  NEAR COOPERTOWN...MOVING SOUTHEAST AT 15 MPH.

* THE TORNADO WILL BE NEAR...
  GREENBRIER...RIDGETOP AND 8 MILES WEST OF MILLERSVILLE BY 745 PM
  CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT 
WEDNESDAY EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3641 8667 3624 8684 3630 8693 3634 8690
      3638 8691 3638 8693 3637 8697 3643 8708
      3645 8710 3658 8697
TIME...MOT...LOC 0011Z 308DEG 11KT 3645 8695

$$

JLM

1 follow-up statement

000 
WWUS54 KOHX 180023
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
723 PM CDT WED JUN 17 2009

TNC037-147-165-180045-
/O.CON.KOHX.TO.W.0089.000000T0000Z-090618T0045Z/
DAVIDSON TN-ROBERTSON TN-SUMNER TN-
723 PM CDT WED JUN 17 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR EXTREME
WEST CENTRAL SUMNER...SOUTHWESTERN ROBERTSON AND NORTH CENTRAL
DAVIDSON COUNTIES...

AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR GREENBRIER...OR 8
MILES SOUTH OF SPRINGFIELD...MOVING SOUTHEAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  RIDGETOP BY 730 PM CDT...
  6 MILES SOUTHWEST OF MILLERSVILLE BY 740 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
WEDNESDAY EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3641 8667 3624 8684 3630 8693 3634 8690
      3638 8691 3638 8693 3637 8697 3643 8708
      3645 8710 3658 8697
TIME...MOT...LOC 0023Z 315DEG 17KT 3637 8685

$$

JLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:19 PM CDT	Tornado Warning	OHX	Montgomery, Robertson	26 min
Jun 17, 7:46 PM CDT	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	29 min
Jun 17, 8:09 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery	36 min
Jun 17, 8:17 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Montgomery, Williamson	28 min
Jun 17, 8:46 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	12 min
Jun 17, 10:11 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	34 min
Jun 17, 11:13 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	32 min
Jun 18, 12:00 AM CDT	Areal Flood Advisory	OHX	Stewart	3 hr
Jun 18, 12:01 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	29 min
Jun 18, 12:15 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	30 min

Nearby

Tornado Warnings in Tennessee, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.