Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 221, NWS Jackson, MS

November 16, 2011Lamar County, Mississippi

NWS Jackson, MS issued this tornado warning at Nov 16, 2011, 5:25 AM CST for Lamar 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: Nov 16, 2011, 5:25 AM CST (11:25 UTC)
Expired: Nov 16, 2011, 5:45 AM CST
In force: 20 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Lamar County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 118 km from the middle of the area, began a volume at 11:25 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
Nov 16, 2:20 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.4 hours before the alert went out and 117 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: 1734 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 661 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

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

452 
WFUS54 KJAN 161125
TORJAN
MSC073-161215-
/O.NEW.KJAN.TO.W.0221.111116T1125Z-111116T1215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
525 AM CST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN LAMAR COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF WEST HATTIESBURG...

* UNTIL 615 AM CST

* AT 525 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 17 MILES
  SOUTHWEST OF WEST HATTIESBURG MOVING NORTHEAST AT 40 MPH.

* THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED COUNTY.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM CST WEDNESDAY MORNING
FOR EASTERN MISSISSIPPI.

&&

LAT...LON 3124 8966 3129 8965 3143 8946 3135 8945
      3134 8935 3126 8935 3115 8965
TIME...MOT...LOC 1125Z 237DEG 35KT 3123 8960

$$

BYB

1 follow-up statement

891 
WWUS54 KJAN 161145
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
545 AM CST WED NOV 16 2011

MSC073-161156-
/O.CAN.KJAN.TO.W.0221.000000T0000Z-111116T1215Z/
LAMAR MS-
545 AM CST WED NOV 16 2011

...THE TORNADO WARNING FOR NORTHERN LAMAR COUNTY IS CANCELLED...

THE STORM THAT PROMPTED THE TORNADO WARNING HAS WEAKENED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM CST WEDNESDAY MORNING
FOR EASTERN MISSISSIPPI.

LAT...LON 3124 8966 3129 8965 3143 8946 3135 8945
      3134 8935 3126 8935 3115 8965
TIME...MOT...LOC 1146Z 237DEG 35KT 3134 8940

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 1:20 AM CST	Special Weather Statement	JAN	Neshoba	60 min
Nov 16, 1:44 AM CST	Special Weather Statement	JAN	Kemper, Lauderdale, Noxubee	61 min
Nov 16, 2:16 AM CST	Special Weather Statement	JAN	Jefferson Davis	44 min
Nov 16, 2:54 AM CST	Tornado Warning	JAN	Covington, Jefferson Davis	66 min
Nov 16, 3:20 AM CST	Tornado Warning	JAN	Lawrence, Marion	25 min
Nov 16, 3:45 AM CST	Tornado Warning	JAN	Jefferson Davis	45 min
Nov 16, 3:49 AM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Marion	26 min
Nov 16, 3:51 AM CST	Tornado Warning	JAN	Smith	23 min
Nov 16, 3:51 AM CST	Tornado Warning	JAN	Jefferson Davis, Lawrence, Marion	24 min
Nov 16, 4:12 AM CST	Tornado Warning	JAN	Covington	48 min
Nov 16, 4:16 AM CST	Tornado Warning	JAN	Covington, Jefferson Davis, Lamar, Marion	44 min
Nov 16, 4:38 AM CST	Tornado Warning	JAN	Smith	35 min
Nov 16, 4:55 AM CST	Tornado Warning	JAN	Jones	38 min
Nov 16, 5:22 AM CST	Tornado Warning	JAN	Jasper	38 min
Nov 16, 5:47 AM CST	Tornado Warning	JAN	Clarke	43 min
Nov 16, 6:32 AM CST	Tornado Warning	JAN	Clarke, Lauderdale	28 min
Nov 16, 5:34 PM CST	Special Weather Statement	JAN	Clarke	46 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.