Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 156, NWS New Orleans, LA

September 19, 2011Harrison County, Jackson County, Mississippi

NWS New Orleans, LA issued this tornado warning at Sep 19, 2011, 2:03 PM CDT for Harrison County, Jackson County, Mississippi. It was in force for 27 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
Sep 19, 2011, 2:03 PM CDT (19:03 UTC)
Expired
Sep 19, 2011, 2:30 PM CDT
In force
27 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon

Counties Harrison County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 56 km from the middle of the area, began a volume at 19:02 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.1 hours before the alert went out and 94 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, Slidell Radar S, LA at 12:00Z on 2011-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2343 joules per kilogram.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2011-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 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
2343 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
530 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.2

Open this sounding in Storm Lab

The text

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

923 
WFUS54 KLIX 191903
TORLIX
MSC047-059-191930-
/O.NEW.KLIX.TO.W.0156.110919T1903Z-110919T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
203 PM CDT MON SEP 19 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN HARRISON COUNTY IN SOUTHERN MISSISSIPPI...  
  WESTERN JACKSON COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 230 PM CDT

* AT 156 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A POSSIBLE TORNADO  
  OVER NORTH OF D'IBERVILLE...OR NEAR ST. MARTIN...MOVING NORTHEAST  
  AT 10 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. 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.

&&

LAT...LON 3046 8881 3046 8900 3068 8892 3069 8889
      3073 8889 3074 8888 3074 8863 3072 8858
TIME...MOT...LOC 1903Z 205DEG 10KT 3050 8888

$$

95/DM
1 follow-up statement
457 
WWUS54 KLIX 191913
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
213 PM CDT MON SEP 19 2011

MSC047-059-191930-
/O.CON.KLIX.TO.W.0156.000000T0000Z-110919T1930Z/
JACKSON MS-HARRISON MS-
213 PM CDT MON SEP 19 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM CDT FOR EASTERN 
HARRISON AND WESTERN JACKSON COUNTIES...

AT 208 PM CDT...LOCAL LAW ENFORCEMENT CONTINUED TO REPORT A TORNADO 
ABOUT 3 MILES NORTH OF THE INTERSTATE 10 AND INTERSTATE 110 
INTERCHANGE.  THE TORNADO IS MOVING NORTH AT 10 MPH AND WILL REMAIN 
OVER MAINLY RURAL AREAS OF HARRISON AND JACKSON COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. 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.

&&

LAT...LON 3048 8881 3049 8899 3066 8892 3063 8877
TIME...MOT...LOC 1911Z 200DEG 9KT 3051 8889

$$

95/DM

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 19, 12:51 PM CDTTornado WarningLIXHarrison9 min
Sep 19, 2:27 PM CDTTornado WarningLIXHarrison, Jackson33 min

Nearby

Tornado Warnings in Mississippi, 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.