Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 24, NWS Mobile, AL

April 4, 2011Choctaw County, Clarke County, Washington County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this tornado warning at Apr 4, 2011, 7:08 PM CDT for Choctaw County, Clarke County, Washington County, Alabama; Wayne County, Mississippi. It was in force for 67 min. 1 report 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: Apr 4, 2011, 7:08 PM CDT (00:08 UTC)
Expired: Apr 4, 2011, 8:15 PM CDT
In force: 67 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL, Wayne County, MS

The radar

The Mobile radar (KMOB), 125 km from the middle of the area, began a volume at 00:12 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
Apr 4, 8:07 PM CDT	TSTM WND DMG	1 S Coffeeville, AL	TREES DOWN ON WEST BEND RD. TIME ESTIMATED FROM RADAR.

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
Apr 4, 5:28 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.1 hours before the alert went out and 202 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: 862 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1607 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 356 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 9.2

Open this sounding in Storm Lab

The text

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

579 
WFUS54 KMOB 050008
TORMOB
ALC023-025-129-MSC153-050115-
/O.NEW.KMOB.TO.W.0024.110405T0008Z-110405T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
708 PM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF WAYNESBORO...
  SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF THOMASVILLE...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 815 PM CDT

* AT 707 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR   
WAYNESBORO...OR NEAR ROBINSON JUNCTION...MOVING EAST AT 60 TO 65 MPH.

* THE TORNADO WILL BE NEAR...
  SILAS AND MILLRY AROUND 720 PM CDT...
  SERVICE AND COFFEEVILLE AROUND 730 PM CDT...
  THOMASVILLE AROUND 750 PM 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 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3200 8807 3200 8767 3194 8767 3158 8823
      3153 8844 3153 8870 3163 8876 3202 8811
TIME...MOT...LOC 0008Z 248DEG 65KT 3163 8857

$$

2 follow-up statements

236 
WWUS54 KMOB 050027
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
727 PM CDT MON APR 4 2011

MSC153-050036-
/O.CAN.KMOB.TO.W.0024.000000T0000Z-110405T0115Z/
WAYNE MS-
727 PM CDT MON APR 4 2011

...THE TORNADO WARNING FOR EAST CENTRAL WAYNE COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

ADDITIONAL THUNDERSTORMS MOVING IN FROM THE WEST MAY PROMPT THE 
SUDDEN ISSUANCE OF ANOTHER TORNADO WARNING FOR WAYNE COUNTY 
MISSISSIPPI.

LAT...LON 3165 8834 3167 8844 3181 8845 3202 8811
      3200 8807 3200 8767 3194 8767 3165 8813
TIME...MOT...LOC 0026Z 246DEG 57KT 3177 8831

$$

ALC023-025-129-050115-
/O.CON.KMOB.TO.W.0024.000000T0000Z-110405T0115Z/
WASHINGTON AL-CLARKE AL-CHOCTAW AL-
727 PM CDT MON APR 4 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR SOUTHERN
CHOCTAW...NORTHWESTERN CLARKE AND NORTHWESTERN WASHINGTON COUNTIES...

AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS NEAR AQUILLA...OR ABOUT 15 MILES EAST OF WAYNESBORO...
MOVING NORTHEAST AT 65 MPH.

THE TORNADO WILL BE NEAR...
  WEST BEND AND WOMACK HILL AROUND 735 PM CDT...
  CUNNINGHAM AND WOODS BLUFF AROUND 740 PM CDT...
  SMYER...CAMPBELL AND FAILETOWN AROUND 745 PM CDT...
  OPINE...TALLAHATTA SPRINGS AND HOLTAMVILLE AROUND 750 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
STURDY BUILDING...PREFERABLY IN AN INTERIOR HALLWAY OR A ROOM SUCH AS
A CLOSET OR BATHROOM. IF POSSIBLE...GET UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY
AND ALWAYS STAY AWAY FROM WINDOWS.

IF YOU ARE IN MOBILE HOME...EVACUATE IT AND GET ON THE LOWEST FLOOR
OF A NEARBY STURDY BUILDING OR IN AN UNDERGROUND STORM SHELTER. IF NO
SUBSTANTIAL SHELTER IS AVAILABLE AND A TORNADO IS FAST APPROACHING...
SEEK SHELTER IN A CULVERT...OR LIE FLAT IN THE NEAREST DITCH OR OTHER
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3165 8834 3167 8844 3181 8845 3202 8811
      3200 8807 3200 8767 3194 8767 3165 8813
TIME...MOT...LOC 0026Z 246DEG 57KT 3177 8831

$$

545 
WWUS54 KMOB 050109
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
809 PM CDT MON APR 4 2011

ALC023-025-129-050118-
/O.EXP.KMOB.TO.W.0024.000000T0000Z-110405T0115Z/
WASHINGTON AL-CLARKE AL-CHOCTAW AL-
809 PM CDT MON APR 4 2011

...THE TORNADO WARNING FOR SOUTHERN CHOCTAW...NORTHWESTERN CLARKE AND
NORTHWESTERN WASHINGTON COUNTIES WILL EXPIRE AT 815 PM CDT...

THE PRIMARY PARENT THUNDERSTORM THAT CONTAINED THE POTENTIAL TORNADO 
HAS SINCE MOVED NORTH OF NORTHERN CLARKE COUNTY.  OTHER 
THUNDERSTORMS FURTHER TO THE SOUTH STILL HAVE A TORNADO WARNING IN 
EFFECT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT TUESDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3165 8834 3167 8844 3181 8845 3202 8811
      3200 8807 3200 8767 3194 8767 3165 8813
TIME...MOT...LOC 0108Z 246DEG 57KT 3204 8759

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:05 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	55 min
Apr 4, 7:30 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Mobile, Washington, Wilcox	60 min
Apr 4, 7:38 PM CDT	Tornado Warning	MOB	Washington	56 min
Apr 4, 7:54 PM CDT	Tornado Warning	MOB	Choctaw, Clarke, Washington	53 min
Apr 4, 8:21 PM CDT	Tornado Warning	MOB	Clarke, Monroe, Washington	39 min
Apr 4, 8:30 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 3 more	60 min
Apr 4, 9:41 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	64 min
Apr 4, 9:44 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Covington, Escambia	61 min
Apr 4, 9:47 PM CDT	Special Marine Warning	MOB		88 min
Apr 4, 10:46 PM CDT	Severe Thunderstorm Warning	MOB	Covington	44 min
Apr 4, 11:36 PM CDT	Special Marine Warning	MOB		84 min
Apr 5, 5:09 AM CDT	Fire Weather Watch	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia, Monroe and 1 more	25 hr

Nearby

Tornado Warnings in Alabama, 2011 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.