Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 215, NWS Mobile, AL

December 10, 2012Clarke County, Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Dec 10, 2012, 11:36 AM CST for Clarke County, Monroe County, Wilcox County, Alabama. It was in force for 54 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 10, 2012, 11:36 AM CST (17:36 UTC)
Expired: Dec 10, 2012, 12:30 PM CST
In force: 54 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Clarke County, AL, Monroe County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 135 km from the middle of the area, began a volume at 17:40 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 10, 8:51 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.6 hours before the alert went out and 135 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: 385 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 531 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

164 
WUUS54 KMOB 101736
SVRMOB
ALC025-099-131-101830-
/O.NEW.KMOB.SV.W.0215.121210T1736Z-121210T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1136 AM CST MON DEC 10 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  EAST CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1230 PM CST

* AT 1134 AM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING DAMAGING WINDS OVER 60 MPH WAS LOCATED FROM 7 
  MILES NORTHEAST OF THOMASVILLE TO 13 MILES SOUTHEAST OF 
  GROVE HILL...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             YELLOW BLUFF...       PINE HILL...
  CATHERINE...          CAMDEN...             VREDENBURGH...
  BEATRICE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3224 8739 3221 8737 3220 8733 3215 8727
      3215 8726 3205 8717 3205 8712 3170 8710
      3157 8761 3201 8766 3201 8763 3213 8763
      3214 8753 3224 8753 3226 8743
TIME...MOT...LOC 1735Z 271DEG 36KT 3199 8765 3161 8757

$$

2 follow-up statements

138 
WWUS54 KMOB 101757
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1157 AM CST MON DEC 10 2012

ALC025-101807-
/O.CAN.KMOB.SV.W.0215.000000T0000Z-121210T1830Z/
CLARKE AL-
1157 AM CST MON DEC 10 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EAST
CENTRAL CLARKE COUNTY...

AT 1152 AM CST...THE LINE OF STORMS THAT PROMPTED THE WARNING FOR EAST 
CENTRAL CLARKE COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE SEVERE 
THUNDERSTORM WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA.

LAT...LON 3172 8745 3202 8752 3207 8750 3212 8747
      3217 8742 3218 8739 3219 8737 3219 8738
      3221 8737 3220 8733 3215 8727 3215 8726
      3205 8717 3205 8712 3170 8710
TIME...MOT...LOC 1757Z 271DEG 36KT 3199 8739 3161 8731

$$

ALC099-131-101830-
/O.CON.KMOB.SV.W.0215.000000T0000Z-121210T1830Z/
MONROE AL-WILCOX AL-
1157 AM CST MON DEC 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CST
FOR CENTRAL WILCOX AND NORTH CENTRAL MONROE COUNTIES...

AT 1152 AM CST...A LINE OF SEVERE THUNDERSTORMS WERE LOCATED ALONG A
LINE EXTENDING FROM 9 MILES WEST OF CAMDEN TO 6 MILES NORTHWEST OF
MONROEVILLE...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             YELLOW BLUFF...       CAMDEN...
  VREDENBURGH...        BEATRICE...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA.

LAT...LON 3172 8745 3202 8752 3207 8750 3212 8747
      3217 8742 3218 8739 3219 8737 3219 8738
      3221 8737 3220 8733 3215 8727 3215 8726
      3205 8717 3205 8712 3170 8710
TIME...MOT...LOC 1757Z 271DEG 36KT 3199 8739 3161 8731

$$

515 
WWUS54 KMOB 101813
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1213 PM CST MON DEC 10 2012

ALC099-131-101830-
/O.CON.KMOB.SV.W.0215.000000T0000Z-121210T1830Z/
MONROE AL-WILCOX AL-
1213 PM CST MON DEC 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CST
FOR CENTRAL WILCOX AND NORTH CENTRAL MONROE COUNTIES...

AT 1211 PM CST...A LINE OF SEVERE THUNDERSTORMS WERE LOCATED ALONG A
LINE EXTENDING FROM 4 MILES EAST OF CAMDEN TO 12 MILES NORTHEAST OF
MONROEVILLE...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  BOYKIN...             CAMDEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM CST MONDAY AFTERNOON
FOR SOUTHWESTERN ALABAMA.

EXPECT FUTURE WARNINGS TO THE EAST SHORTLY. 

&&

LAT...LON 3174 8712 3173 8732 3204 8731 3207 8730
      3211 8732 3211 8730 3215 8728 3216 8730
      3217 8732 3217 8729 3215 8727 3215 8726
      3205 8717 3205 8712
TIME...MOT...LOC 1813Z 271DEG 36KT 3199 8720 3161 8712

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 3:51 AM CST	Small Craft Advisory	MOB		29 hr
Dec 10, 9:43 AM CST	Special Marine Warning	MOB		2 hr
Dec 10, 9:53 AM CST	Severe Thunderstorm Warning	MOB	Choctaw	52 min
Dec 10, 10:03 AM CST	Tornado Warning	MOB	Baldwin	42 min
Dec 10, 10:31 AM CST	Severe Thunderstorm Warning	MOB	Washington	49 min
Dec 10, 10:36 AM CST	Tornado Warning	MOB	Choctaw, Washington	40 min
Dec 10, 10:37 AM CST	Tornado Warning	MOB	Baldwin	38 min
Dec 10, 10:58 AM CST	Tornado Warning	MOB	Clarke	41 min
Dec 10, 11:32 AM CST	Severe Thunderstorm Warning	MOB	Mobile, Washington	42 min
Dec 10, 12:09 PM CST	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Monroe	47 min
Dec 10, 12:18 PM CST	Severe Thunderstorm Warning	MOB	Butler, Monroe, Wilcox	42 min
Dec 10, 12:30 PM CST	Severe Thunderstorm Warning	MOB	Clarke, Conecuh, Monroe	28 min
Dec 10, 12:32 PM CST	Severe Thunderstorm Warning	MOB	Butler, Wilcox	29 min
Dec 10, 12:37 PM CST	Special Marine Warning	MOB		92 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 Every severe thunderstorm warning 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.