Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 163, NWS Jackson, MS

May 13, 2011Choctaw County, Webster County, Mississippi

NWS Jackson, MS issued this tornado warning at May 13, 2011, 6:55 PM CDT for Choctaw County, Webster County, Mississippi. It was in force for 20 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: May 13, 2011, 6:55 PM CDT (23:55 UTC)
Expired: May 13, 2011, 7:15 PM CDT
In force: 20 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Choctaw County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 102 km from the middle of the area, began a volume at 23:58 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.

Issued	Product	Office	Lasted
May 13, 12:31 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.9 hours before the alert went out and 150 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: 2132 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

215 
WFUS54 KJAN 132355
TORJAN
MSC019-155-140030-
/O.NEW.KJAN.TO.W.0163.110513T2355Z-110514T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
655 PM CDT FRI MAY 13 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CHOCTAW COUNTY IN CENTRAL MISSISSIPPI...
  SOUTHERN WEBSTER COUNTY IN NORTH CENTRAL MISSISSIPPI...

* UNTIL 730 PM CDT

* AT 655 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES WEST OF
  EUPORA MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  REFORM...SHERWOOD AND MATHISTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING HAIL 
AND DESTRUCTIVE STRAIGHT LINE WINDS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
SATURDAY MORNING FOR NORTHEASTERN MISSISSIPPI.

&&

LAT...LON 3360 8910 3342 8912 3345 8939 3346 8939
      3346 8948 3347 8951 3361 8950
TIME...MOT...LOC 2355Z 271DEG 25KT 3352 8941

$$

BYB

1 follow-up statement

399 
WWUS54 KJAN 140015
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
715 PM CDT FRI MAY 13 2011

MSC019-155-140025-
/O.CAN.KJAN.TO.W.0163.000000T0000Z-110514T0030Z/
WEBSTER MS-CHOCTAW MS-
715 PM CDT FRI MAY 13 2011

...THE TORNADO WARNING FOR NORTHERN CHOCTAW AND SOUTHERN WEBSTER
COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE TORNADO WARNING HAS WEAKENED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
SATURDAY MORNING FOR NORTHEASTERN MISSISSIPPI.

LAT...LON 3360 8910 3342 8912 3345 8939 3346 8939
      3346 8948 3347 8951 3361 8950
TIME...MOT...LOC 0015Z 271DEG 25KT 3352 8924

$$

BYB

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 13, 3:25 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Washington	36 min
May 13, 4:24 AM CDT	Special Weather Statement	JAN	Bolivar	31 min
May 13, 4:44 AM CDT	Special Weather Statement	JAN	Sunflower	31 min
May 13, 5:21 AM CDT	Special Weather Statement	JAN	Sunflower	29 min
May 13, 5:44 AM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore, Sunflower	46 min
May 13, 6:35 AM CDT	Special Weather Statement	JAN	Sunflower	45 min
May 13, 7:47 AM CDT	Special Weather Statement	JAN	Lowndes	58 min
May 13, 7:56 AM CDT	Special Weather Statement	JAN	Lowndes	29 min
May 13, 8:15 AM CDT	Special Weather Statement	JAN	Lowndes	45 min
May 13, 11:16 AM CDT	Flash Flood Warning	JAN	Warren	119 min
May 13, 11:31 AM CDT	Special Weather Statement	JAN	Forrest, Lamar	59 min
May 13, 11:39 AM CDT	Special Weather Statement	JAN	Covington, Jefferson Davis	61 min
May 13, 12:25 PM CDT	Special Weather Statement	JAN	Madison	60 min
May 13, 12:58 PM CDT	Special Weather Statement	JAN	Grenada	62 min
May 13, 1:27 PM CDT	Special Weather Statement	JAN	Scott	28 min
May 13, 2:08 PM CDT	Flash Flood Warning	JAN	Carroll, Montgomery	2 hr
May 13, 2:30 PM CDT	Special Weather Statement	JAN	Jefferson Davis, Lawrence, Marion	45 min
May 13, 2:41 PM CDT	Special Weather Statement	JAN	Montgomery	44 min
May 13, 2:45 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Carroll, Holmes, Montgomery	45 min
May 13, 2:48 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Montgomery	42 min
May 13, 3:12 PM CDT	Special Weather Statement	JAN	Forrest, Lamar	43 min
May 13, 3:15 PM CDT	Special Weather Statement	JAN	Covington, Jones	45 min
May 13, 3:37 PM CDT	Special Weather Statement	JAN	Choctaw, Montgomery, Webster	43 min
May 13, 3:37 PM CDT	Severe Thunderstorm Warning	JAN	Jones	53 min
May 13, 3:46 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Webster	33 min
May 13, 4:46 PM CDT	Special Weather Statement	JAN	Jasper	39 min
May 13, 5:06 PM CDT	Areal Flood Warning	JAN	Issaquena, Warren	48 hr
May 13, 5:14 PM CDT	Special Weather Statement	JAN	Newton	46 min
May 13, 5:26 PM CDT	Special Weather Statement	JAN	Neshoba	29 min
May 13, 5:29 PM CDT	Special Weather Statement	JAN	Montgomery	41 min
May 13, 5:30 PM CDT	Special Weather Statement	JAN	Newton	40 min
May 13, 5:42 PM CDT	Severe Thunderstorm Warning	JAN	Neshoba, Newton	46 min
May 13, 6:03 PM CDT	Flash Flood Warning	JAN	Montgomery, Webster	117 min
May 13, 6:25 PM CDT	Special Weather Statement	JAN	Scott	30 min
May 13, 6:45 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Montgomery, Webster	41 min

Nearby

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