Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 95, NWS Mobile, AL

September 3, 2011Mobile County, Alabama

NWS Mobile, AL issued this tornado warning at Sep 3, 2011, 11:58 PM CDT for Mobile County, Alabama. It was in force for 62 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 3, 2011, 11:58 PM CDT (04:58 UTC)
Expired
Sep 4, 2011, 1:00 AM CDT
In force
62 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 05:01 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 3, 9:43 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.0 hours before the alert went out and 146 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 00:00Z on 2011-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1081 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2011-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 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
1081 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
495 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

466 
WFUS54 KMOB 040458
TORMOB
ALC097-040600-
/O.NEW.KMOB.TO.W.0095.110904T0458Z-110904T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1158 PM CDT SAT SEP 3 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 100 AM CDT

* AT 1152 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 15 MILES SOUTH
  OF DAUPHIN ISLAND...OR 13 MILES SOUTH OF SAND ISLAND...MOVING NORTH
  AT 35 MPH. THERE IS ANOTHER POTENTIAL TORNADI THUNDERSTORM         
  FOLLOWING CLOSELY BEHIND THE LEAD THUNDERSTORM THAT IS BEING       
  WARNED FOR.

* LOCATIONS IMPACTED INCLUDE...
  TILLMANS CORNER...    THEODORE...           CODEN...       
  GRAND BAY...          BELLE FONTAINE...     BAYOU LA BATRE...

  OR...THE WESTERN HALF OF MOBILE COUNTY.

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 1 AND 20.

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 SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3026 8819 3031 8819 3032 8823 3036 8820
      3033 8825 3037 8825 3038 8839 3078 8841
      3077 8816 3055 8810 3035 8811 3031 8813
      3029 8819 3026 8818 3029 8812 3024 8811
      3023 8830
TIME...MOT...LOC 0456Z 167DEG 30KT 3007 8819

$$
2 follow-up statements
881 
WWUS54 KMOB 040529
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1229 AM CDT SUN SEP 4 2011

ALC097-040600-
/O.CON.KMOB.TO.W.0095.000000T0000Z-110904T0600Z/
MOBILE AL-
1229 AM CDT SUN SEP 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHWESTERN MOBILE COUNTY...

AT 1219 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR CODEN...MOVING 
NORTH AT 35 MPH. ADDITIONAL TORNADO PRODUCING THUNDERSTORMS...ONE 
OVER THE MISSISSIPPI SOUND AND ANOTHER JUST SOUTH OF DAUPHIN ISLAND 
WILL CONTINUE MOVING NORTHWARD OFF OF THE GULF OF MEXICO IN THE WAKE 
OF THIS LEAD THUNDERSTORM.

THESE POTENTIAL TORNADO PRODUCING SUPERCELLS WILL CONTINUE MOVING 
ACROSS MAINLY THE SOUTHERN AND WESTERN HALF OF MOBILE COUNTY DURING 
THE NEXT HOUR.

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 SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3026 8819 3031 8819 3032 8823 3036 8820
      3033 8825 3037 8825 3038 8839 3078 8841
      3077 8816 3055 8810 3035 8811 3031 8813
      3029 8819 3026 8818 3029 8812 3024 8811
      3023 8830
TIME...MOT...LOC 0525Z 160DEG 30KT 3044 8829

$$
358 
WWUS54 KMOB 040541
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1241 AM CDT SUN SEP 4 2011

ALC097-040600-
/O.CON.KMOB.TO.W.0095.000000T0000Z-110904T0600Z/
MOBILE AL-
1241 AM CDT SUN SEP 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHWESTERN MOBILE COUNTY...

AT 1234 AM CDT...RADAR INDICATED A POSSIBLE TORNADO JUST NORTH OF 
I-10 IN GRAND BAY. A SECOND POSSIBLE TORNADO WAS LOCATED 3 MILE 
SOUTH OF CODEN AND YET A THIRD POSSIBLE TORNADO WAS LOCATED OVER THE 
MISSISSIPPI SOUND. ALL STORMS WERE OVER MOVING TO THE NORTHWEST AT 
40 MPH.

THESE STORMS WILL CONTINUE MOVING TO THE NORTHWEST OVER MAINLY THE 
WESTERN HALF OF MOBILE COUNTY.

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 SUNDAY MORNING FOR
SOUTHWEST ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3026 8819 3031 8819 3032 8823 3036 8820
      3033 8825 3037 8825 3038 8839 3078 8841
      3077 8816 3055 8810 3035 8811 3031 8813
      3029 8819 3026 8818 3029 8812 3024 8811
      3023 8830
TIME...MOT...LOC 0538Z 156DEG 36KT 3055 8835

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 7:53 PM CDTAreal Flood WarningMOBBaldwin, Mobile6 hr
Sep 3, 8:02 PM CDTSpecial Marine WarningMOB43 min
Sep 3, 8:24 PM CDTSpecial Marine WarningMOB51 min
Sep 3, 9:11 PM CDTRiver Flood WarningMOBCovington, Escambia12 hr
Sep 3, 10:34 PM CDTSpecial Marine WarningMOB41 min
Sep 3, 11:11 PM CDTTornado WarningMOBMobile64 min
Sep 4, 12:13 AM CDTSpecial Marine WarningMOB2 hr
Sep 4, 12:59 AM CDTTornado WarningMOBMobile61 min
Sep 4, 1:14 AM CDTFlash Flood WarningMOBMobile3 hr
Sep 4, 1:40 AM CDTFlash Flood WarningMOBMobile3 hr
Sep 4, 1:59 AM CDTTornado WarningMOBMobile45 min
Sep 4, 2:16 AM CDTSpecial Marine WarningMOB119 min
Sep 4, 2:46 AM CDTTornado WarningMOBBaldwin59 min
Sep 4, 3:16 AM CDTSpecial Marine WarningMOB119 min
Sep 4, 3:57 AM CDTTornado WarningMOBBaldwin42 min
Sep 4, 4:49 AM CDTSpecial Marine WarningMOB86 min
Sep 4, 5:36 AM CDTFlash Flood WarningMOBCovington, Escambia3 hr
Sep 4, 5:51 AM CDTSpecial Marine WarningMOB114 min
Sep 4, 9:42 AM CDTSpecial Marine WarningMOB33 min
Sep 4, 9:59 AM CDTRiver Flood WarningMOBChoctaw, Clarke, Washington4 days
Sep 4, 9:59 AM CDTRiver Flood WarningMOBChoctaw, Clarke, Washington5 days
Sep 4, 10:43 AM CDTSpecial Marine WarningMOB47 min
Sep 4, 10:44 AM CDTSpecial Marine WarningMOB46 min
Sep 4, 11:29 AM CDTSpecial Marine WarningMOB46 min
Sep 4, 11:46 AM CDTTornado WarningMOBBaldwin, Mobile19 min
Sep 4, 12:12 PM CDTTornado WarningMOBWashington63 min
Sep 4, 12:58 PM CDTTornado WarningMOBWashington62 min
Sep 4, 1:20 PM CDTTornado WarningMOBClarke, Washington55 min
Sep 4, 4:01 PM CDTTornado WarningMOBChoctaw, Clarke59 min
Sep 4, 4:09 PM CDTTornado WarningMOBWashington36 min
Sep 4, 4:15 PM CDTTornado WarningMOBBaldwin, Escambia60 min
Sep 4, 4:28 PM CDTTornado WarningMOBBaldwin49 min

Nearby

Tornado Warnings in Alabama, 2011Every tornado warning in 2011Tornadoes 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.