Alert archive / Tennessee / Tornado Warnings in 2009

Tornado Warning 69, NWS Nashville, TN

May 8, 2009Macon County, Tennessee

NWS Nashville, TN issued this tornado warning at May 8, 2009, 2:38 PM CDT for Macon County, Tennessee. It was in force for 37 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: May 8, 2009, 2:38 PM CDT (19:38 UTC)
Expired: May 8, 2009, 3:15 PM CDT
In force: 37 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Macon County, TN

The radar

The Nashville radar (KOHX), 62 km from the middle of the area, began a volume at 19:39 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
May 8, 12:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.6 hours before the alert went out and 73 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: 117 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOHX 081938
TOROHX
TNC111-082015-
/O.NEW.KOHX.TO.W.0069.090508T1938Z-090508T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
238 PM CDT FRI MAY 8 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  MACON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 315 PM CDT

* AT 236 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES WEST OF
  LAFAYETTE...OR 9 MILES NORTH OF HARTSVILLE...MOVING NORTHEAST AT 45
  MPH.

* THE TORNADO WILL BE NEAR...
  LAFAYETTE BY 250 PM CDT...
  8 MILES NORTHWEST OF RED BOILING SPRINGS BY 300 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO SAFE
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER
YOUR HEAD.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3663 8579 3647 8581 3649 8621 3652 8621
      3653 8622 3655 8621 3664 8590 3664 8582
TIME...MOT...LOC 1938Z 242DEG 41KT 3652 8619

$$

19

1 follow-up statement

000 
WWUS54 KOHX 081944
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
244 PM CDT FRI MAY 8 2009

TNC111-082015-
/O.CON.KOHX.TO.W.0069.000000T0000Z-090508T2015Z/
MACON TN-
244 PM CDT FRI MAY 8 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR MACON
COUNTY...

AT 243 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO. THIS TORNADO WAS LOCATED 8 MILES WEST OF 
LAFAYETTE...MOVING NORTHEAST AT 40 MPH.

THE TORNADO WILL BE NEAR...
  LAFAYETTE BY 255 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY 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 700 PM CDT FRIDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3663 8579 3655 8580 3648 8600 3649 8621
      3652 8621 3653 8622 3655 8621 3656 8618
      3663 8594 3664 8594 3664 8582
TIME...MOT...LOC 1944Z 242DEG 41KT 3652 8616

$$

BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 4:10 AM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	35 min
May 8, 4:18 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Williamson	27 min
May 8, 4:32 AM CDT	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner	43 min
May 8, 5:49 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	26 min
May 8, 6:18 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Warren	27 min
May 8, 8:41 AM CDT	Areal Flood Advisory	OHX	Davidson	3 hr
May 8, 11:30 AM CDT	Flash Flood Watch	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more	37 hr
May 8, 1:05 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	40 min
May 8, 1:16 PM CDT	Tornado Warning	OHX	Montgomery, Stewart	44 min
May 8, 1:43 PM CDT	Tornado Warning	OHX	Montgomery, Robertson	47 min
May 8, 2:14 PM CDT	Tornado Warning	OHX	Macon, Sumner	31 min
May 8, 2:30 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	30 min
May 8, 2:30 PM CDT	Tornado Warning	OHX	Robertson, Sumner	45 min
May 8, 2:59 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	16 min
May 8, 3:08 PM CDT	Tornado Warning	OHX	Clay, Macon	22 min
May 8, 3:14 PM CDT	Tornado Warning	OHX	Macon	31 min
May 8, 3:23 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	22 min
May 8, 3:24 PM CDT	Tornado Warning	OHX	Clay, Overton, Pickett	51 min
May 8, 3:32 PM CDT	Tornado Warning	OHX	Overton, Pickett	28 min
May 8, 3:59 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	46 min
May 8, 4:02 PM CDT	Tornado Warning	OHX	Fentress, Pickett	28 min
May 8, 4:07 PM CDT	Areal Flood Advisory	OHX	Fentress, Overton, Pickett	3 hr
May 8, 4:29 PM CDT	Tornado Warning	OHX	Fentress	16 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.