Alert archive / Alabama / Tornado Warnings in 2012

Tornado Warning 69, NWS Mobile, AL

September 30, 2012Mobile County, Washington County, Alabama; Greene County, Mississippi

NWS Mobile, AL issued this tornado warning at Sep 30, 2012, 6:08 PM CDT for Mobile County, Washington County, Alabama; Greene County, Mississippi. It was in force for 34 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, 6:08 PM CDT (23:08 UTC)
Expired
Sep 30, 2012, 6:42 PM CDT
In force
34 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Mobile County, AL, Washington County, AL, Greene County, MS

The radar

The Mobile radar (KMOB), 69 km from the middle of the area, began a volume at 23:11 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, 5:50 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.1 hours before the alert went out and 178 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.

112 
WFUS54 KMOB 302308
TORMOB
ALC097-129-MSC041-010015-
/O.NEW.KMOB.TO.W.0069.120930T2308Z-121001T0015Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHWESTERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  SOUTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 715 PM CDT

* AT 608 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 10 MILES SOUTHEAST OF LEAKESVILLE...OR 12 MILES
  WEST OF GULFCREST...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  VINEGAR BEND...       TIBBIE...             DEER PARK...
  CHATOM...

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 200 AM CDT MONDAY MORNING FOR
SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3153 8828 3138 8804 3099 8834 3105 8852
TIME...MOT...LOC 2308Z 210DEG 27KT 3108 8842

$$
2 follow-up statements
793 
WWUS54 KMOB 302329
SVSMOB

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

ALC097-MSC041-302338-
/O.CAN.KMOB.TO.W.0069.000000T0000Z-121001T0015Z/
GREENE MS-MOBILE AL-
629 PM CDT SUN SEP 30 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTHWESTERN MOBILE AND
SOUTHEASTERN GREENE COUNTIES...

AT 625 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHWESTERN 
MOBILE AND SOUTHEASTERN GREENE COUNTIES HAD MOVED OUT OF 
NORTHWESTERN MOBILE AND SOUTHEASTERN GREENE COUNTIES...THUS THE 
TORNADO WARNING HAS BEEN CANCELLED.

LAT...LON 3153 8828 3138 8804 3114 8823 3114 8833
      3113 8833 3112 8835 3113 8838 3119 8844
      3121 8844
TIME...MOT...LOC 2328Z 206DEG 21KT 3117 8836

$$

ALC129-010015-
/O.CON.KMOB.TO.W.0069.000000T0000Z-121001T0015Z/
WASHINGTON AL-
629 PM CDT SUN SEP 30 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR SOUTHERN
WASHINGTON COUNTY...

AT 625 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 10 MILES NORTHWEST OF CITRONELLE...OR 5 MILES SOUTHWEST
OF DEER PARK...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  VINEGAR BEND...       TIBBIE...             DEER PARK...  

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.

&&

LAT...LON 3153 8828 3138 8804 3114 8823 3114 8833
      3113 8833 3112 8835 3113 8838 3119 8844
      3121 8844
TIME...MOT...LOC 2328Z 206DEG 21KT 3117 8836

$$
353 
WWUS54 KMOB 302342 RRA
SVSMOB

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

ALC129-302351-
/O.CAN.KMOB.TO.W.0069.000000T0000Z-121001T0015Z/
WASHINGTON AL-
642 PM CDT SUN SEP 30 2012

...THE TORNADO WARNING HAS BEEN CANCELLED FOR SOUTHERN WASHINGTON
COUNTY...

AT 639 PM CDT...THE ROTATION IN THE STORM THAT PROMPTED THE WARNING 
FOR SOUTHERN WASHINGTON COUNTY HAD WEAKENED...THUS THE TORNADO 
WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM CDT MONDAY.

LAT...LON 3153 8828 3138 8804 3114 8823 3114 8833
      3113 8833 3112 8835 3113 8838 3119 8844
      3121 8844
TIME...MOT...LOC 2341Z 206DEG 21KT 3124 8832

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 30, 11:15 AM CDTSpecial Marine WarningMOB60 min
Sep 30, 12:14 PM CDTSpecial Marine WarningMOB91 min
Sep 30, 12:15 PM CDTAreal Flood AdvisoryMOBBaldwin, Mobile2 hr
Sep 30, 6:29 PM CDTTornado WarningMOBBaldwin28 min
Sep 30, 3:36 PM CDTSevere Thunderstorm WarningMOBGeorge, Perry, Stone54 min
Sep 30, 4:09 PM CDTTornado WarningMOBStone51 min
Sep 30, 4:33 PM CDTTornado WarningMOBPerry, Stone42 min
Sep 30, 5:04 PM CDTTornado WarningMOBGeorge, Greene, Perry, Stone41 min

Nearby

Tornado Warnings in Alabama, 2012Tornado 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.