Alert archive / Tennessee / Tornado Warnings in 2009

Tornado Warning 101, NWS Nashville, TN

October 9, 2009Giles County, Marshall County, Tennessee

NWS Nashville, TN issued this tornado warning at Oct 9, 2009, 3:21 PM CDT for Giles County, Marshall County, Tennessee. It was in force for 24 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: Oct 9, 2009, 3:21 PM CDT (20:21 UTC)
Expired: Oct 9, 2009, 3:45 PM CDT
In force: 24 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Giles County, TN, Marshall County, TN

The radar

The Northeast Alabama radar (KHTX), 73 km from the middle of the area, began a volume at 20:22 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.

Issued	Product	Office	Lasted
Oct 9, 12:24 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.4 hours before the alert went out and 94 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: 1183 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 667 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOHX 092021
TOROHX
TNC055-117-092045-
/O.NEW.KOHX.TO.W.0101.091009T2021Z-091009T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
321 PM CDT FRI OCT 9 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MARSHALL COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL GILES COUNTY IN MIDDLE TENNESSEE...

* UNTIL 345 PM CDT

* AT 319 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EAST
  CENTRAL GILES COUNTY...OR 8 MILES EAST OF PULASKI...MOVING
  NORTHEAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL SOUTHERN MARSHALL COUNTY AT 330 PM CDT
  RURAL EASTERN GILES COUNTY AT 330 PM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CDT FRIDAY AFTERNOON
FOR CENTRAL TENNESSEE.

&&

LAT...LON 3528 8697 3544 8667 3534 8659 3533 8662
      3532 8664 3532 8667 3529 8671 3527 8673
      3527 8681 3522 8681 3519 8689
TIME...MOT...LOC 2020Z 235DEG 39KT 3524 8689

$$

LAROSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 12:02 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson	28 min
Oct 9, 12:16 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	44 min
Oct 9, 12:47 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Williamson	28 min
Oct 9, 12:48 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner	27 min
Oct 9, 1:25 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	35 min
Oct 9, 1:41 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	34 min
Oct 9, 2:11 PM CDT	Severe Thunderstorm Warning	OHX	Maury	22 min
Oct 9, 2:20 PM CDT	Severe Thunderstorm Warning	OHX	Wilson	25 min
Oct 9, 2:23 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith	22 min
Oct 9, 2:43 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson	32 min
Oct 9, 3:16 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	19 min
Oct 9, 3:17 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury	28 min
Oct 9, 3:18 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	28 min
Oct 9, 3:24 PM CDT	Tornado Warning	OHX	Coffee	36 min
Oct 9, 3:38 PM CDT	Tornado Warning	OHX	Bedford, Marshall	37 min
Oct 9, 3:59 PM CDT	Tornado Warning	OHX	Bedford, Cannon, Coffee, Rutherford	31 min
Oct 9, 4:07 PM CDT	Tornado Warning	OHX	Bedford, Coffee	23 min
Oct 9, 4:23 PM CDT	Tornado Warning	OHX	Coffee, Warren	37 min
Oct 9, 4:51 PM CDT	Severe Thunderstorm Warning	OHX	Grundy	24 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.