Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 76, NWS Memphis, TN

October 17, 2012Benton County, Marshall County, Tate County, Mississippi

NWS Memphis, TN issued this tornado warning at Oct 17, 2012, 9:46 PM CDT for Benton County, Marshall County, Tate County, Mississippi. It was in force for 29 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: Oct 17, 2012, 9:46 PM CDT (02:46 UTC)
Expired: Oct 17, 2012, 10:15 PM CDT
In force: 29 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

Counties Benton County, MS, Marshall County, MS, Tate County, MS

The radar

The Memphis radar (KNQA), 92 km from the middle of the area, began a volume at 02:47 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.

Issued	Product	Office	Lasted
Oct 17, 5:21 PM CDT	Tornado Watch	SPC	7 hr
Oct 17, 8:23 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 2.8 hours before the alert went out and 54 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: 947 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

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

637 
WFUS54 KMEG 180246
TORMEG
MSC009-093-137-180315-
/O.NEW.KMEG.TO.W.0076.121018T0246Z-121018T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
946 PM CDT WED OCT 17 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN BENTON COUNTY IN NORTHEAST MISSISSIPPI...
  SOUTHERN MARSHALL COUNTY IN NORTHWEST MISSISSIPPI...
  SOUTHEASTERN TATE COUNTY IN NORTHWEST MISSISSIPPI...

* UNTIL 1015 PM CDT

* AT 946 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING A TORNADO 6 MILES SOUTHWEST OF
  MARIANNA...OR 12 MILES WEST OF WALL DOXEY STATE PARK...MOVING EAST
  AT 55 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALL DOXEY
  STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STORM SHELTER. IF NO
STORM SHELTER IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

.TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3455 8924 3454 8925 3455 8947 3456 8948
      3456 8977 3471 8973 3476 8924
TIME...MOT...LOC 0246Z 270DEG 49KT 3465 8961

$$

1 follow-up statement

352 
WWUS54 KMEG 180308 RRA
SVSMEG

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1008 PM CDT WED OCT 17 2012

MSC009-093-137-180319-
/O.EXP.KMEG.TO.W.0076.000000T0000Z-121018T0315Z/
BENTON MS-TATE MS-MARSHALL MS-
1008 PM CDT WED OCT 17 2012

...THE TORNADO WARNING FOR SOUTHERN MARSHALL...SOUTHEASTERN TATE AND
SOUTHWESTERN BENTON COUNTIES WILL EXPIRE AT 1015 PM CDT...

AT 1009 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

.CONTINUE TO MONITOR WEATHER CONDITIONS AS FUTURE WARNINGS ARE
POSSIBLE FOR YOUR AREA.

LAT...LON 3455 8924 3454 8925 3455 8947 3456 8948
      3456 8977 3471 8973 3476 8924
TIME...MOT...LOC 0309Z 270DEG 49KT 3465 8923

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 17, 7:20 PM CDT	Severe Thunderstorm Warning	MEG	Tunica	40 min
Oct 17, 7:43 PM CDT	Tornado Warning	MEG	Tunica	32 min
Oct 17, 8:10 PM CDT	Tornado Warning	MEG	DeSoto, Panola, Tate, Tunica	35 min
Oct 17, 8:23 PM CDT	Tornado Warning	MEG	Tunica	37 min
Oct 17, 8:37 PM CDT	Tornado Warning	MEG	DeSoto, Tate	38 min
Oct 17, 8:42 PM CDT	Severe Thunderstorm Warning	MEG	Benton, DeSoto, Marshall	38 min
Oct 17, 8:49 PM CDT	Tornado Warning	MEG	DeSoto, Tate, Tunica	26 min
Oct 17, 9:01 PM CDT	Tornado Warning	MEG	DeSoto, Marshall, Tate	29 min
Oct 17, 9:05 PM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Quitman, Tallahatchie	40 min
Oct 17, 9:07 PM CDT	Tornado Warning	MEG	DeSoto, Tate, Tunica	23 min
Oct 17, 9:09 PM CDT	Tornado Warning	MEG	Coahoma, Tallahatchie	51 min
Oct 17, 9:18 PM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Panola, Quitman, Tate, Tunica	42 min
Oct 17, 9:23 PM CDT	Tornado Warning	MEG	Benton, Marshall	37 min
Oct 17, 9:26 PM CDT	Tornado Warning	MEG	Lafayette, Marshall, Panola, Tate	49 min
Oct 17, 9:28 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Tate, Tunica	32 min
Oct 17, 9:33 PM CDT	Severe Thunderstorm Warning	MEG	Panola, Quitman, Tallahatchie	42 min
Oct 17, 9:36 PM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Marshall, Panola	39 min
Oct 17, 9:49 PM CDT	Tornado Warning	MEG	Tallahatchie, Yalobusha	26 min
Oct 17, 9:53 PM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Tunica	52 min
Oct 17, 9:55 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Benton, Marshall, Tippah	50 min
Oct 17, 10:05 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Benton, Lafayette, Lee, Marshall, Prentiss and 2 more	40 min
Oct 17, 10:11 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Panola, Yalobusha	49 min
Oct 17, 10:17 PM CDT	Special Weather Statement	MEG	DeSoto, Marshall	28 min
Oct 17, 10:26 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Tippah, Tishomingo	64 min
Oct 17, 10:35 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Itawamba, Lee, Pontotoc, Prentiss, Tippah and 2 more	55 min
Oct 17, 10:42 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Lafayette, Lee, Pontotoc, Yalobusha	48 min
Oct 17, 10:44 PM CDT	Special Weather Statement	MEG	Coahoma, Panola, Quitman, Tate, Tunica	31 min
Oct 17, 10:46 PM CDT	Special Weather Statement	MEG	Benton, Marshall	44 min
Oct 17, 10:48 PM CDT	Special Weather Statement	MEG	Tallahatchie, Yalobusha	42 min
Oct 17, 11:08 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	52 min

Nearby

Tornado Warnings in Mississippi, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.