Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 48, NWS Nashville, TN

April 24, 2011Sumner County, Trousdale County, Wilson County, Tennessee

NWS Nashville, TN issued this tornado warning at Apr 24, 2011, 1:06 PM CDT for Sumner County, Trousdale County, Wilson County, Tennessee. It was in force for 24 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
Apr 24, 2011, 1:06 PM CDT (18:06 UTC)
Expired
Apr 24, 2011, 1:30 PM CDT
In force
24 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon

Counties Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 34 km from the middle of the area, began a volume at 18:06 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

TimeReportWhereRemark
Apr 24, 1:09 PM CDTHAIL 0.881 Nne Gallatin, TN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.1 hours before the alert went out and 44 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2011-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1536 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2011-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1536 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.8

Open this sounding in Storm Lab

The text

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

094 
WFUS54 KOHX 241806
TOROHX
TNC165-169-189-241830-
/O.NEW.KOHX.TO.W.0048.110424T1806Z-110424T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
106 PM CDT SUN APR 24 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN SUMNER COUNTY IN MIDDLE TENNESSEE...
  TROUSDALE COUNTY IN MIDDLE TENNESSEE...
  NORTHERN WILSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 130 PM CDT

* AT 104 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR GALLATIN...AND MOVING EAST AT 35 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  HARTSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3644 8615 3644 8610 3634 8609 3630 8613
      3626 8611 3625 8612 3628 8654 3647 8653
      3649 8619
TIME...MOT...LOC 1806Z 270DEG 30KT 3637 8641

$$

BOYD
1 follow-up statement
713 
WWUS54 KOHX 241818
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
118 PM CDT SUN APR 24 2011

TNC165-169-189-241830-
/O.CON.KOHX.TO.W.0048.000000T0000Z-110424T1830Z/
TROUSDALE TN-SUMNER TN-WILSON TN-
118 PM CDT SUN APR 24 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL WILSON...
SOUTHEASTERN SUMNER AND WESTERN TROUSDALE COUNTIES UNTIL 130 PM
CDT...

AT 113 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR GALLATIN...MOVING EAST AT 25 MPH. THE STORM HAS
SLOWED IN ITS FORWARD MOTION.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN WILSON...SOUTHERN SUMNER AND WESTERN
  TROUSDALE COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3648 8620 3626 8618 3629 8650 3646 8650
      3649 8621
TIME...MOT...LOC 1816Z 267DEG 21KT 3638 8642

$$

BOYD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 12:34 AM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Robertson26 min
Apr 24, 12:13 PM CDTSevere Thunderstorm WarningOHXDavidson, Robertson, Sumner47 min
Apr 24, 12:37 PM CDTTornado WarningOHXDavidson, Robertson, Sumner38 min
Apr 24, 12:47 PM CDTFlash Flood WarningOHXSumner118 min
Apr 24, 1:22 PM CDTSevere Thunderstorm WarningOHXMacon, Sumner, Trousdale39 min
Apr 24, 1:36 PM CDTSevere Thunderstorm WarningOHXClay, Macon, Sumner, Trousdale54 min
Apr 24, 2:24 PM CDTSevere Thunderstorm WarningOHXClay, Jackson, Macon, Pickett66 min

Nearby

Tornado Warnings in Tennessee, 2011Every tornado warning in 2011Tornadoes in 2011

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.