Alert archive / Tennessee / Tornado Warnings in 2012

Tornado Warning 16, NWS Huntsville, AL

March 2, 2012Franklin County, Tennessee

NWS Huntsville, AL issued this tornado warning at Mar 2, 2012, 3:16 PM CST for Franklin County, Tennessee. It was in force for 19 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: Mar 2, 2012, 3:16 PM CST (21:16 UTC)
Expired: Mar 2, 2012, 3:35 PM CST
In force: 19 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Franklin County, TN

The radar

The Northeast Alabama radar (KHTX), 31 km from the middle of the area, began a volume at 21:16 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

Time	Report	Where	Remark
Mar 2, 3:25 PM CST	HAIL 2.75	Decherd, TN	BASEBALL SIZE HAIL WAS REPORTED.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 2, 1:20 PM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.3 hours before the alert went out and 119 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: 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.

973 
WFUS54 KHUN 022116
TORHUN
TNC051-022145-
/O.NEW.KHUN.TO.W.0016.120302T2116Z-120302T2145Z/

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

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN FRANKLIN COUNTY IN TENNESSEE...

* UNTIL 345 PM CST

* AT 311 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO JUST SOUTH OF   
  WINCHESTER...MOVING EAST AT 45 MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...
  HIGHWAY 64.
  COWAN.
  SEWANEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CST FRIDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3522 8586 3513 8586 3509 8611 3520 8616
      3529 8591
TIME...MOT...LOC 2116Z 250DEG 40KT 3517 8602

$$

BCC

1 follow-up statement

799 
WWUS54 KHUN 022135
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
335 PM CST FRI MAR 2 2012

TNC051-022145-
/O.CAN.KHUN.TO.W.0016.000000T0000Z-120302T2145Z/
FRANKLIN TN-
335 PM CST FRI MAR 2 2012

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

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN 
FRANKLIN COUNTY UNTIL 345 PM CST.

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.

HOWEVER...LARGE HAIL...DAMAGING WINDS...AND FREQUENT LIGHTNING ARE 
STILL POSSIBLE FROM ANOTHER THUNDERSTORM MOVING ACROSS NORTHERN 
FRANKLIN COUNTY. STAY INDOORS UNTIL THE STORM HAS PASSED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CST FRIDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

LAT...LON 3522 8586 3513 8586 3509 8611 3520 8616
      3529 8591
TIME...MOT...LOC 2135Z 250DEG 40KT 3524 8578

$$

BCC

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 4:44 AM CST	Wind Advisory	HUN	Franklin, Lincoln, Moore	11 hr
Mar 2, 9:12 AM CST	Severe Thunderstorm Warning	HUN	Lincoln	33 min
Mar 2, 9:41 AM CST	Tornado Warning	HUN	Franklin, Lincoln	34 min
Mar 2, 9:55 AM CST	Tornado Warning	HUN	Franklin	9 min
Mar 2, 9:59 AM CST	Tornado Warning Emergency	HUN	Franklin, Lincoln	31 min
Mar 2, 10:10 AM CST	Tornado Warning	HUN	Franklin	35 min
Mar 2, 10:24 AM CST	Tornado Warning	HUN	Franklin	36 min
Mar 2, 1:55 PM CST	Severe Thunderstorm Warning	HUN	Lincoln	50 min
Mar 2, 2:00 PM CST	Tornado Warning	HUN	Lincoln	30 min
Mar 2, 2:28 PM CST	Tornado Warning	HUN	Franklin, Lincoln, Moore	32 min
Mar 2, 2:38 PM CST	Tornado Warning	HUN	Lincoln	18 min
Mar 2, 2:58 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	47 min
Mar 2, 3:58 PM CST	Tornado Warning	HUN	Franklin, Lincoln	14 min
Mar 2, 4:10 PM CST	Severe Thunderstorm Warning	HUN	Franklin, Lincoln	50 min

Nearby

Tornado Warnings in Tennessee, 2012 Every tornado warning in 2012 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.