Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 7, NWS Huntsville, AL

February 24, 2011Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this tornado warning at Feb 24, 2011, 11:32 PM CST for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 28 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
Feb 24, 2011, 11:32 PM CST (05:32 UTC)
Expired
Feb 25, 2011, 12:00 AM CST
In force
28 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 39 km from the middle of the area, began a volume at 05:35 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
Feb 24, 8:30 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 5.5 hours before the alert went out and 107 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 00:00Z on 2011-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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 00:00Z on 2011-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 538 square meters per square second.1939587897117Sfc1 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
17 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
538 m²/s²
0-3 km storm-relative helicity
629 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

211 
WFUS54 KHUN 250532
TORHUN
TNC051-103-127-250600-
/O.NEW.KHUN.TO.W.0007.110225T0532Z-110225T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1132 PM CST THU FEB 24 2011

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN FRANKLIN COUNTY IN TENNESSEE...
  EAST CENTRAL LINCOLN COUNTY IN TENNESSEE...
  SOUTHEASTERN MOORE COUNTY IN TENNESSEE...

* UNTIL MIDNIGHT CST

* AT 1131 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MARBLE     
  HILL...MOVING EAST AT 55 MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...
  ESTILL SPRINGS.
  WOODS RESERVOIR.
  ALTO.
  ST. ANDREWS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR THE TORNADO...IT MAY BE TOO LATE. TAKE COVER NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CST FRIDAY MORNING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3536 8602 3533 8599 3533 8597 3530 8592
      3526 8589 3523 8589 3523 8586 3521 8587
      3508 8654 3527 8643 3537 8608
TIME...MOT...LOC 0531Z 256DEG 50KT 3523 8631

$$
SL
1 follow-up statement
403 
WWUS54 KHUN 250542
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1142 PM CST THU FEB 24 2011

TNC103-250551-
/O.CAN.KHUN.TO.W.0007.000000T0000Z-110225T0600Z/
LINCOLN TN-
1142 PM CST THU FEB 24 2011

...THE TORNADO WARNING FOR EAST CENTRAL LINCOLN COUNTY IS CANCELED...

WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORM THAT 
PROMPTED THE TORNADO WARNING HAD MOVED OUT OF THE COUNTY. THEREFORE 
THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
LIMESTONE COUNTY UNTIL 1215 AM CST FOR DESTRUCTIVE WINDS IN EXCESS 
OF 70 MPH.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CST FRIDAY MORNING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

LAT...LON 3536 8602 3533 8600 3530 8592 3526 8589
      3523 8589 3523 8586 3521 8587 3514 8622
      3513 8629 3513 8632 3514 8635 3513 8635
      3532 8628 3537 8608
TIME...MOT...LOC 0541Z 256DEG 50KT 3526 8614

$$

TNC051-127-250600-
/O.CON.KHUN.TO.W.0007.000000T0000Z-110225T0600Z/
MOORE TN-FRANKLIN TN-
1142 PM CST THU FEB 24 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST FOR
NORTHERN FRANKLIN AND SOUTHEASTERN MOORE COUNTIES...

AT 1141 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR TIMS FORD LAKE 
MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DECHERD...WOODS RESERVOIR...ALTO...SEWANEE AND ST. ANDREWS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR THE TORNADO...IT MAY BE TOO LATE. TAKE COVER NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CST FRIDAY MORNING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3536 8602 3533 8600 3530 8592 3526 8589
      3523 8589 3523 8586 3521 8587 3514 8622
      3513 8629 3513 8632 3514 8635 3513 8635
      3532 8628 3537 8608
TIME...MOT...LOC 0541Z 256DEG 50KT 3526 8614

$$

SL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 10:45 PM CSTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore45 min
Feb 24, 11:25 PM CSTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore50 min
Feb 24, 11:56 PM CSTTornado WarningHUNFranklin22 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.