Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 67, NWS Mobile, AL

September 30, 2012Perry County, Stone County, Mississippi

NWS Mobile, AL issued this tornado warning at Sep 30, 2012, 4:33 PM CDT for Perry County, Stone County, Mississippi. It was in force for 42 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 30, 2012, 4:33 PM CDT (21:33 UTC)
Expired
Sep 30, 2012, 5:15 PM CDT
In force
42 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 76 km from the middle of the area, began a volume at 21:35 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.

IssuedProductOfficeLasted
Sep 30, 2:36 PM CDTTornado WatchSPC3 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.6 hours before the alert went out and 96 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 2012-09-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1360 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-09-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
1360 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
552 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

612 
WFUS54 KMOB 302133
TORMOB
MSC111-131-302215-
/O.NEW.KMOB.TO.W.0067.120930T2133Z-120930T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
433 PM CDT SUN SEP 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 515 PM CDT

* AT 433 PM CDT...A SEVERE THUNDERSTORM WITH STRONG ROTATION AND
  LIKELY PRODUCING A TORNADO WAS LOCATED 6 MILES SOUTH OF WIGGINS...
  OR 2 MILES EAST OF PERKINSTON...MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTH CENTRAL PERRY COUNTY
  RURAL NORTHEASTERN STONE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3100 8902 3086 8888 3085 8888 3075 8907
      3080 8916
TIME...MOT...LOC 2133Z 217DEG 29KT 3080 8908

$$
4 follow-up statements
715 
WWUS54 KMOB 302140
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
440 PM CDT SUN SEP 30 2012

MSC111-131-302215-
/O.CON.KMOB.TO.W.0067.000000T0000Z-120930T2215Z/
STONE MS-PERRY MS-
440 PM CDT SUN SEP 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTH
CENTRAL PERRY AND NORTHEASTERN STONE COUNTIES...

AT 440 PM CDT...A SEVERE THUNDERSTORM WITH STRONG ROTATION AND LIKELY
PRODUCING A TORNADO WAS LOCATED 5 MILES SOUTHEAST OF WIGGINS...OR 4 
MILES EAST OF PERKINSTON...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTH CENTRAL PERRY COUNTY
  RURAL NORTHEASTERN STONE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3078 8907 3081 8912 3100 8902 3086 8888
      3085 8888
TIME...MOT...LOC 2140Z 218DEG 23KT 3083 8906

$$
589 
WWUS54 KMOB 302146
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
446 PM CDT SUN SEP 30 2012

MSC111-131-302215-
/O.CON.KMOB.TO.W.0067.000000T0000Z-120930T2215Z/
STONE MS-PERRY MS-
446 PM CDT SUN SEP 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTH
CENTRAL PERRY AND NORTH CENTRAL STONE COUNTIES...

AT 446 PM CDT...A SEVERE THUNDERSTORM WITH STRONG ROTATION AND LIKELY
PRODUCING A TORNADO WAS LOCATED 5 MILES EAST OF WIGGINS...OR 6 MILES 
NORTHEAST OF PERKINSTON...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTH CENTRAL PERRY COUNTY
  RURAL NORTH CENTRAL STONE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3081 8905 3084 8909 3100 8902 3089 8891
      3086 8896
TIME...MOT...LOC 2146Z 214DEG 13KT 3084 8905

$$
597 
WWUS54 KMOB 302200
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
500 PM CDT SUN SEP 30 2012

MSC111-131-302215-
/O.CON.KMOB.TO.W.0067.000000T0000Z-120930T2215Z/
STONE MS-PERRY MS-
500 PM CDT SUN SEP 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTH
CENTRAL PERRY AND NORTHEASTERN STONE COUNTIES...

AT 500 PM CDT...A SEVERE THUNDERSTORM WITH STRONG ROTATION AND LIKELY
PRODUCING A TORNADO WAS LOCATED 9 MILES EAST OF WIGGINS...OR 12 
MILES NORTHEAST OF PERKINSTON...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTH CENTRAL PERRY COUNTY
  RURAL NORTHEASTERN STONE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3085 8898 3089 8903 3098 8900 3089 8891
      3086 8896
TIME...MOT...LOC 2200Z 224DEG 24KT 3089 8897

$$
472 
WWUS54 KMOB 302215
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
515 PM CDT SUN SEP 30 2012

MSC111-131-302225-
/O.EXP.KMOB.TO.W.0067.000000T0000Z-120930T2215Z/
STONE MS-PERRY MS-
515 PM CDT SUN SEP 30 2012

...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE FOR SOUTH CENTRAL
PERRY AND NORTHEASTERN STONE COUNTIES...

AT 515 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTH CENTRAL
PERRY AND NORTHEASTERN STONE COUNTIES HAS MOVED OUT OF THE COUNTY...
THUS THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEAST MISSISSIPPI.

LAT...LON 3085 8898 3089 8903 3098 8900 3089 8891
      3086 8896
TIME...MOT...LOC 2200Z 224DEG 24KT 3089 8897

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 30, 3:36 PM CDTSevere Thunderstorm WarningMOBGeorge, Perry, Stone54 min
Sep 30, 4:09 PM CDTTornado WarningMOBStone51 min
Sep 30, 5:04 PM CDTTornado WarningMOBGeorge, Greene, Perry, Stone41 min
Sep 30, 6:08 PM CDTTornado WarningMOBGreene34 min

Nearby

Tornado Warnings in Mississippi, 2012Every tornado warning in 2012Tornadoes in 2012

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.