Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 152, NWS Mobile, AL

December 22, 2011Baldwin County, Alabama

NWS Mobile, AL issued this tornado warning at Dec 22, 2011, 12:57 PM CST for Baldwin County, Alabama. It was in force for 21 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, 12:57 PM CST (18:57 UTC)
Expired: Dec 22, 2011, 1:18 PM CST
In force: 21 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 38 km from the middle of the area, began a volume at 18:57 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.0 hours before the alert went out and 177 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: 578 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 476 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

812 
WFUS54 KMOB 221857
TORMOB
ALC003-221930-
/O.NEW.KMOB.TO.W.0152.111222T1857Z-111222T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1257 PM CST THU DEC 22 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 130 PM CST

* AT 1257 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES
  SOUTHWEST OF POINT CLEAR...OR 8 MILES WEST OF MOUTH OF WEEKS BAY...
  MOVING NORTHEAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  FAIRHOPE AROUND 110 PM CST...
  SILVERHILL AROUND 120 PM CST...
  LOXLEY AROUND 125 PM CST...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 40 AND 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

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

&&

LAT...LON 3047 8793 3048 8794 3049 8795 3054 8791
      3056 8791 3067 8785 3063 8763 3041 8791
TIME...MOT...LOC 1858Z 217DEG 39KT 3042 8797

$$

1 follow-up statement

640 
WWUS54 KMOB 221918
SVSMOB

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

ALC003-221928-
/O.CAN.KMOB.TO.W.0152.000000T0000Z-111222T1930Z/
BALDWIN AL-
118 PM CST THU DEC 22 2011

...THE TORNADO WARNING FOR CENTRAL BALDWIN COUNTY IS CANCELLED...

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

LAT...LON 3047 8793 3048 8794 3049 8795 3054 8791
      3056 8791 3067 8785 3063 8763 3041 8791
TIME...MOT...LOC 1918Z 217DEG 39KT 3059 8782

$$

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, 11:59 AM CST	Tornado Warning	MOB	Clarke	22 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, 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.