Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 150, NWS Mobile, AL

December 22, 2011Clarke County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 22, 2011, 11:59 AM CST for Clarke County, Alabama. It was in force for 22 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: Dec 22, 2011, 11:59 AM CST (17:59 UTC)
Expired: Dec 22, 2011, 12:21 PM CST
In force: 22 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Clarke County, AL

The radar

The Mobile radar (KMOB), 129 km from the middle of the area, began a volume at 18:01 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.

Issued	Product	Office	Lasted
Dec 22, 10:00 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 6.0 hours before the alert went out and 188 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 129 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.

121 
WFUS54 KMOB 221759
TORMOB
ALC025-221845-
/O.NEW.KMOB.TO.W.0150.111222T1759Z-111222T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1159 AM CST THU DEC 22 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1245 PM CST

* AT 1157 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES
  NORTHWEST OF JACKSON...OR 2 MILES SOUTH OF COFFEEVILLE...MOVING
  NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  THOMASVILLE...        COFFEEVILLE...

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 500 PM CST THURSDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3200 8767 3190 8767 3163 8804 3166 8808
      3168 8808 3176 8810 3175 8815 3179 8817
      3199 8799
TIME...MOT...LOC 1759Z 218DEG 35KT 3176 8806

$$

1 follow-up statement

073 
WWUS54 KMOB 221821
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1221 PM CST THU DEC 22 2011

ALC025-221831-
/O.CAN.KMOB.TO.W.0150.000000T0000Z-111222T1845Z/
CLARKE AL-
1221 PM CST THU DEC 22 2011

...THE TORNADO WARNING FOR NORTHWESTERN CLARKE COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM CST THURSDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3200 8767 3190 8767 3163 8804 3166 8808
      3168 8808 3176 8810 3175 8815 3179 8817
      3199 8799
TIME...MOT...LOC 1821Z 218DEG 35KT 3193 8790

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 22, 5:10 AM CST	Small Craft Advisory	MOB		14 hr
Dec 22, 11:08 AM CST	Tornado Warning	MOB	Washington	52 min
Dec 22, 11:11 AM CST	Special Marine Warning	MOB		49 min
Dec 22, 12:04 PM CST	Special Marine Warning	MOB		86 min
Dec 22, 12:37 PM CST	Tornado Warning	MOB	Mobile	11 min
Dec 22, 12:57 PM CST	Tornado Warning	MOB	Baldwin	21 min
Dec 22, 1:28 PM CST	Severe Thunderstorm Warning	MOB	Conecuh, Escambia	32 min
Dec 22, 1:34 PM CST	Tornado Warning	MOB	Conecuh, Escambia	26 min
Dec 22, 1:47 PM CST	Severe Thunderstorm Warning	MOB	Butler	13 min
Dec 22, 2:56 PM CST	Tornado Warning	MOB	Crenshaw	19 min
Dec 22, 4:34 PM CST	Special Marine Warning	MOB		41 min

Nearby

Tornado Warnings in Alabama, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.