Alert archive / Mississippi / Tornado Warnings in 2011

Tornado Warning 120, NWS Mobile, AL

September 4, 2011Perry County, Stone County, Mississippi

NWS Mobile, AL issued this tornado warning at Sep 4, 2011, 7:05 PM CDT for Perry County, Stone County, Mississippi. It was in force for 28 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 4, 2011, 7:05 PM CDT (00:05 UTC)
Expired: Sep 4, 2011, 7:33 PM CDT
In force: 28 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 90 km from the middle of the area, began a volume at 00:08 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.

What was reported inside it

Time	Report	Where	Remark
Sep 4, 7:10 PM CDT	TORNADO	5 Ssw Wiggins, MS	PUBLIC REPORTED TORNADO JUST WEST OF THE PERKINSTON AREA.
Sep 4, 7:20 PM CDT	TORNADO	2 Wsw Wiggins, MS	TORNADO REPORTED NEAR U.S. HIGHWAY 49 AND HIGHWAY 26 ON THE WESTERN SIDE OF WIGGINS. REPORT RELAYED BY STONE COUNTY EMA.
Sep 4, 7:23 PM CDT	TORNADO	3 Nw Wiggins, MS	PUBLIC REPORTING TORNADO PASSING THROUGH THE BOND AREA OF NORTHERN STONE COUNTY NORTH OF WIGGINS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 3:47 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.1 hours before the alert went out and 87 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.

316 
WFUS54 KMOB 050005
TORMOB
MSC111-131-050045-
/O.NEW.KMOB.TO.W.0120.110905T0005Z-110905T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
705 PM CDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  CENTRAL STONE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 745 PM CDT

* AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES SOUTH OF
  WIGGINS...OR 3 MILES SOUTHWEST OF PERKINSTON...MOVING NORTH AT 30
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  WIGGINS...            PERKINSTON...         MCHENRY...

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 1000 PM CDT SUNDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3091 8922 3092 8914 3101 8915 3100 8897
      3068 8912 3070 8928
TIME...MOT...LOC 0005Z 192DEG 26KT 3077 8917

$$

3 follow-up statements

442 
WWUS54 KMOB 050015
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
715 PM CDT SUN SEP 4 2011

MSC111-131-050045-
/O.CON.KMOB.TO.W.0120.000000T0000Z-110905T0045Z/
STONE MS-PERRY MS-
715 PM CDT SUN SEP 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHWESTERN PERRY AND CENTRAL STONE COUNTIES...

AT 712 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR WIGGINS...MOVING 
NORTH AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOND 
AND BARBARA.

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.

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 1000 PM CDT SUNDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3078 8923 3091 8922 3092 8914 3101 8915
      3100 8897 3077 8908
TIME...MOT...LOC 0015Z 186DEG 29KT 3085 8917

$$

881 
WWUS54 KMOB 050021
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
721 PM CDT SUN SEP 4 2011

MSC111-131-050045-
/O.CON.KMOB.TO.W.0120.000000T0000Z-110905T0045Z/
STONE MS-PERRY MS-
721 PM CDT SUN SEP 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHWESTERN PERRY AND NORTH CENTRAL STONE COUNTIES...

AT 717 PM CDT...THE PUBLIC REPORTED A TORNADO NEAR WIGGINS AT THE 
INTERSECTION OF HIGHWAY 49 AND COUNTY ROAD 26. THIS TORNADO IS 
MOVING NORTH AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOND.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3082 8907 3082 8922 3091 8922 3092 8914
      3101 8915 3100 8897
TIME...MOT...LOC 0019Z 180DEG 28KT 3088 8918

$$

865 
WWUS54 KMOB 050033
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
733 PM CDT SUN SEP 4 2011

MSC111-131-050043-
/O.CAN.KMOB.TO.W.0120.000000T0000Z-110905T0045Z/
STONE MS-PERRY MS-
733 PM CDT SUN SEP 4 2011

...THE TORNADO WARNING FOR SOUTHWESTERN PERRY AND NORTH CENTRAL STONE
COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3082 8907 3082 8922 3091 8922 3092 8914
      3101 8915 3100 8897
TIME...MOT...LOC 0033Z 180DEG 28KT 3099 8918

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 4:40 AM CDT	Tornado Warning	MOB	George, Greene	50 min
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.