Alert archive / Tennessee / Tornado Warnings in 2012

Tornado Warning 7, NWS Huntsville, AL

March 2, 2012Franklin County, Tennessee

NWS Huntsville, AL issued this tornado warning at Mar 2, 2012, 9:55 AM CST for Franklin County, Tennessee. It was in force for 9 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
Mar 2, 2012, 9:55 AM CST (15:55 UTC)
Expired
Mar 2, 2012, 10:04 AM CST
In force
9 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

County Franklin County, TN

The radar

The Northeast Alabama radar (KHTX), 43 km from the middle of the area, began a volume at 15:58 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.

IssuedProductOfficeLasted
Mar 2, 9:25 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 3.9 hours before the alert went out and 104 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 2012-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1667 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 2012-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.1939587897117136Sfc1 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
1667 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
523 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
169 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

800 
WFUS54 KHUN 021555
TORHUN
TNC051-021630-
/O.NEW.KHUN.TO.W.0007.120302T1555Z-120302T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
955 AM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL FRANKLIN COUNTY IN TENNESSEE...

* UNTIL 1030 AM CST

* AT 950 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ESTILL
  SPRINGS...OR ABOUT 7 MILES NORTH OF WINCHESTER...MOVING EAST AT 65
  MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...
  ALTO.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST FRIDAY AFTERNOON
FOR NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3535 8605 3535 8603 3532 8600 3531 8596
      3530 8592 3526 8589 3520 8614 3535 8620
      3537 8615
TIME...MOT...LOC 1555Z 251DEG 56KT 3531 8606

$$
1 follow-up statement
119 
WWUS54 KHUN 021604
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1004 AM CST FRI MAR 2 2012

TNC051-021614-
/O.CAN.KHUN.TO.W.0007.000000T0000Z-120302T1630Z/
FRANKLIN TN-
1004 AM CST FRI MAR 2 2012

...THE TORNADO WARNING FOR NORTH CENTRAL FRANKLIN COUNTY IS
CANCELED...

WEATHER SERVICE DOPPLER RADAR INDICATES THE TORNADIC THUNDERSTORM
THAT PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY. THEREFORE THE
TORNADO WARNING HAS BEEN CANCELED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST FRIDAY AFTERNOON 
FOR NORTHERN ALABAMA AND CENTRAL TENNESSEE.

LAT...LON 3535 8605 3535 8603 3532 8600 3531 8596
      3530 8592 3526 8589 3520 8614 3535 8620
      3537 8615
TIME...MOT...LOC 1604Z 251DEG 56KT 3464 8564

$$

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 2, 4:44 AM CSTWind AdvisoryHUNFranklin, Lincoln, Moore11 hr
Mar 2, 9:12 AM CSTSevere Thunderstorm WarningHUNLincoln33 min
Mar 2, 9:41 AM CSTTornado WarningHUNFranklin, Lincoln34 min
Mar 2, 9:59 AM CSTTornado Warning EmergencyHUNFranklin, Lincoln31 min
Mar 2, 10:10 AM CSTTornado WarningHUNFranklin35 min
Mar 2, 10:24 AM CSTTornado WarningHUNFranklin36 min
Mar 2, 1:55 PM CSTSevere Thunderstorm WarningHUNLincoln50 min
Mar 2, 2:00 PM CSTTornado WarningHUNLincoln30 min
Mar 2, 2:28 PM CSTTornado WarningHUNFranklin, Lincoln, Moore32 min
Mar 2, 2:38 PM CSTTornado WarningHUNLincoln18 min
Mar 2, 2:58 PM CSTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore47 min
Mar 2, 3:16 PM CSTTornado WarningHUNFranklin19 min
Mar 2, 3:58 PM CSTTornado WarningHUNFranklin, Lincoln14 min
Mar 2, 4:10 PM CSTSevere Thunderstorm WarningHUNFranklin, Lincoln50 min

Nearby

Tornado Warnings in Tennessee, 2012Every tornado warning in 2012Tornadoes in 2012

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.