Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 154, NWS New Orleans, LA

September 5, 2011Jackson County, Mississippi

NWS New Orleans, LA issued this tornado warning at Sep 5, 2011, 5:00 AM CDT for Jackson County, Mississippi. It was in force for 30 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 5, 2011, 5:00 AM CDT (10:00 UTC)
Expired: Sep 5, 2011, 5:30 AM CDT
In force: 30 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Jackson County, MS

The radar

The Mobile radar (KMOB), 37 km from the middle of the area, began a volume at 10:03 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
Sep 4, 9:42 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.0 hours before the alert went out and 112 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: 1653 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

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

892 
WFUS54 KLIX 051000
TORLIX
MSC059-051030-
/O.NEW.KLIX.TO.W.0154.110905T1000Z-110905T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
500 AM CDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL JACKSON COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 530 AM CDT

* AT 458 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  VANCLEAVE...OR 10 MILES NORTHWEST OF ESCATAWPA...MOVING NORTH AT 35
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WADE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT MONDAY MORNING FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3049 8860 3055 8880 3074 8873 3074 8850
      3074 8848
TIME...MOT...LOC 1000Z 200DEG 29KT 3060 8867

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 7:55 PM CDT	Tornado Warning	LIX	Hancock, Harrison	50 min
Sep 4, 10:33 PM CDT	Coastal Flood Warning	LIX		17 hr
Sep 4, 10:43 PM CDT	Wind Advisory	LIX	Amite, Pearl River, Pike, Walthall, Wilkinson	25 hr
Sep 5, 4:21 AM CDT	Tornado Warning	LIX	Jackson	24 min
Sep 5, 7:04 AM CDT	Severe Thunderstorm Warning	LIX	Jackson	26 min
Sep 5, 9:33 AM CDT	River Flood Warning	LIX	Pike, Walthall	49 hr

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.