Alert archive / Tennessee / Tornado Warnings in 2009

Tornado Warning 71, NWS Nashville, TN

May 8, 2009Macon County, Tennessee

NWS Nashville, TN issued this tornado warning at May 8, 2009, 3:14 PM CDT for Macon County, Tennessee. It was in force for 31 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, 3:14 PM CDT (20:14 UTC)
Expired: May 8, 2009, 3:45 PM CDT
In force: 31 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Macon County, TN

The radar

The Nashville radar (KOHX), 66 km from the middle of the area, began a volume at 20:17 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, 8.2 hours before the alert went out and 77 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 082014
TOROHX
TNC111-082045-
/O.NEW.KOHX.TO.W.0071.090508T2014Z-090508T2045Z/

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 345 PM CDT

* AT 311 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME
  NORTHWESTERN MACON COUNTY...OR 11 MILES NORTHWEST OF LAFAYETTE...
  MOVING EAST AT 45 MPH.

* THE TORNADO WILL BE CROSS...
  MAINLY RURAL PARTS OF NORTHERN MACON COUNTY...TOWARD COMMUNITIES LIKE
  GALEN AND PUMPKINVILLE.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT FRIDAY AFTERNOON
FOR CENTRAL TENNESSEE. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 700 PM CDT FRIDAY EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3663 8580 3654 8580 3655 8622 3665 8620
TIME...MOT...LOC 2013Z 264DEG 11KT 3659 8621

$$

19

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, 2:38 PM CDT	Tornado Warning	OHX	Macon	37 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, 3:23 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.