Alert archive / Tennessee / Tornado Warnings in 2011

Tornado Warning 25, NWS Huntsville, AL

April 4, 2011Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this tornado warning at Apr 4, 2011, 3:29 PM CDT for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 31 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 4, 2011, 3:29 PM CDT (20:29 UTC)
Expired: Apr 4, 2011, 4:00 PM CDT
In force: 31 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), 36 km from the middle of the area, began a volume at 20:31 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
Apr 4, 3:50 PM CDT	HAIL 0.5	Estill Springs, TN	DIME SIZE HAIL IN ESTILL SPRINGS.

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
Apr 4, 1:03 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.5 hours before the alert went out and 111 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: 68 J/kg
Mixed-layer CIN: -640 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 507 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

960 
WFUS54 KHUN 042029
TORHUN
TNC051-103-127-042100-
/O.NEW.KHUN.TO.W.0025.110404T2029Z-110404T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
329 PM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  FRANKLIN COUNTY IN TENNESSEE...
  EASTERN LINCOLN COUNTY IN TENNESSEE...
  SOUTHEASTERN MOORE COUNTY IN TENNESSEE...

* UNTIL 400 PM CDT

* AT 328 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  SMITHLAND...OR ABOUT 9 MILES SOUTH OF LYNCHBURG...MOVING EAST AT 60
  MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...
  HARMONY.
  WINCHESTER.
  COWAN.
  SEWANEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT MONDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3533 8599 3533 8597 3530 8592 3526 8589
      3523 8589 3523 8586 3506 8587 3505 8652
      3528 8642 3534 8600
TIME...MOT...LOC 2028Z 269DEG 57KT 3516 8636

$$

1 follow-up statement

790 
WWUS54 KHUN 042042
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
342 PM CDT MON APR 4 2011

TNC103-127-042052-
/O.CAN.KHUN.TO.W.0025.000000T0000Z-110404T2100Z/
MOORE TN-LINCOLN TN-
342 PM CDT MON APR 4 2011

...THE TORNADO WARNING FOR EASTERN LINCOLN AND SOUTHEASTERN MOORE
COUNTIES IS CANCELED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT MONDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

LAT...LON 3530 8592 3526 8589 3523 8589 3523 8586
      3506 8587 3506 8631 3514 8630 3515 8632
      3517 8630 3518 8628 3519 8629 3531 8620
      3534 8600
TIME...MOT...LOC 2042Z 269DEG 57KT 3516 8609

$$

TNC051-042100-
/O.CON.KHUN.TO.W.0025.000000T0000Z-110404T2100Z/
FRANKLIN TN-
342 PM CDT MON APR 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR FRANKLIN
COUNTY...

AT 342 PM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION.  THIS TORNADO WAS LOCATED
NEAR WINCHESTER...MOVING EAST AT 60 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT MONDAY EVENING FOR
NORTHERN ALABAMA AND CENTRAL TENNESSEE.

&&

LAT...LON 3530 8592 3526 8589 3523 8589 3523 8586
      3506 8587 3506 8631 3514 8630 3515 8632
      3517 8630 3518 8628 3519 8629 3531 8620
      3534 8600
TIME...MOT...LOC 2042Z 269DEG 57KT 3516 8609

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 1:41 PM CDT	Special Weather Statement	HUN	Lincoln	34 min
Apr 4, 2:18 PM CDT	Special Weather Statement	HUN	Lincoln, Moore	27 min
Apr 4, 3:03 PM CDT	Tornado Warning	HUN	Franklin, Lincoln, Moore	27 min
Apr 4, 3:21 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	39 min
Apr 4, 3:55 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln	35 min
Apr 4, 4:27 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	33 min

Nearby

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