Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 129, NWS Mobile, AL

September 5, 2011George County, Greene County, Mississippi

NWS Mobile, AL issued this tornado warning at Sep 5, 2011, 4:40 AM CDT for George County, Greene County, Mississippi. It was in force for 50 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, 4:40 AM CDT (09:40 UTC)
Expired: Sep 5, 2011, 5:30 AM CDT
In force: 50 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties George County, MS, Greene County, MS

The radar

The Mobile radar (KMOB), 51 km from the middle of the area, began a volume at 09:40 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, 9.7 hours before the alert went out and 129 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.

786 
WFUS54 KMOB 050940
TORMOB
MSC039-041-051030-
/O.NEW.KMOB.TO.W.0129.110905T0940Z-110905T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
440 AM CDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 530 AM CDT

* AT 435 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 18 MILES NORTH
  OF ST. MARTIN...OR 11 MILES NORTHWEST OF VANCLEAVE...MOVING NORTH
  AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LEAKESVILLE...        LUCEDALE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT 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 MANUFACTURED 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
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3121 8867 3111 8843 3110 8843 3073 8862
      3073 8885 3074 8886
TIME...MOT...LOC 0940Z 200DEG 38KT 3073 8874

$$

2 follow-up statements

712 
WWUS54 KMOB 051007
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
507 AM CDT MON SEP 5 2011

MSC039-041-051030-
/O.CON.KMOB.TO.W.0129.000000T0000Z-110905T1030Z/
GREENE MS-GEORGE MS-
507 AM CDT MON SEP 5 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR GEORGE
AND SOUTHEASTERN GREENE COUNTIES...

AT 503 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR 
LUCEDALE...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  LUCEDALE...    VERNAL...       HILLMAN...
  DUEITT...      LEAKESVILLE...  PISGAH...
  BRADLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT MONDAY MORNING FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3121 8867 3111 8843 3110 8843 3073 8862
      3073 8885 3074 8886
TIME...MOT...LOC 1006Z 204DEG 35KT 3096 8863

$$

318 
WWUS54 KMOB 051017
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
517 AM CDT MON SEP 5 2011

MSC039-051026-
/O.CAN.KMOB.TO.W.0129.000000T0000Z-110905T1030Z/
GEORGE MS-
517 AM CDT MON SEP 5 2011

...THE TORNADO WARNING FOR GEORGE COUNTY IS CANCELLED...

AT 512 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORM THAT PROMPTED THE WARNING HAD MOVED NORTH OUT 
OF GEORGE COUNTY...THUS THE TORNADO WARNING HAS BEEN CANCELLED FOR 
GEORGE COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT MONDAY MORNING FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3100 8853 3101 8864 3105 8865 3118 8860
      3111 8843 3110 8843
TIME...MOT...LOC 1016Z 204DEG 35KT 3105 8858

$$

MSC041-051030-
/O.CON.KMOB.TO.W.0129.000000T0000Z-110905T1030Z/
GREENE MS-
517 AM CDT MON SEP 5 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR
SOUTHEASTERN GREENE COUNTY...

AT 512 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR 
VERNAL...OR 6 MILES NORTH OF LUCEDALE...MOVING NORTHEAST AT 40 MPH.

THE TORNADO WILL BE NEAR...
  DUEITT...LEAKESVILLE AND PISGAH BY 525 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT MONDAY MORNING FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3100 8853 3101 8864 3105 8865 3118 8860
      3111 8843 3110 8843
TIME...MOT...LOC 1016Z 204DEG 35KT 3105 8858

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 4, 7:05 PM CDT	Tornado Warning	MOB	Perry, Stone	28 min
Sep 4, 8:15 PM CDT	Tornado Warning	MOB	Perry	45 min
Sep 4, 8:28 PM CDT	Tornado Warning	MOB	Wayne	62 min
Sep 4, 9:58 PM CDT	Wind Advisory	MOB	George, Greene, Perry, Stone, Wayne	24 hr
Sep 5, 5:24 AM CDT	Tornado Warning	MOB	Greene, Wayne	51 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.