Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Mobile, AL

April 5, 20124 counties in Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 5, 2012, 11:24 AM CDT for 4 counties in Alabama. It was in force for 66 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: Apr 5, 2012, 11:24 AM CDT (16:24 UTC)
Expired: Apr 5, 2012, 12:30 PM CDT
In force: 66 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 152 km from the middle of the area, began a volume at 16:26 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
Apr 5, 9:14 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.4 hours before the alert went out and 166 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: 315 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -91 m²/s²
0-3 km storm-relative helicity: -43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

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

753 
WUUS54 KMOB 051624
SVRMOB
ALC023-025-129-131-051730-
/O.NEW.KMOB.SV.W.0047.120405T1624Z-120405T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1124 AM CDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  CLARKE COUNTY IN SOUTHWEST ALABAMA...
  NORTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1230 PM CDT

* AT 1123 AM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE
  EXTENDING FROM 11 MILES NORTHEAST OF BUTLER TO 14 MILES SOUTH OF
  BUTLER TO 7 MILES EAST OF WAYNESBORO...AND MOVING EAST AT 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
THURSDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3216 8728 3179 8752 3148 8786 3151 8845
      3152 8846 3175 8846 3190 8830 3224 8807
      3225 8801 3218 8800 3208 8804 3205 8811
      3201 8811 3199 8806 3201 8763 3213 8763
      3214 8753 3226 8753 3228 8750 3228 8745
TIME...MOT...LOC 1623Z 276DEG 36KT 3215 8798 3188 8817
          3165 8847

$$

PURDY

3 follow-up statements

873 
WWUS54 KMOB 051644
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1144 AM CDT THU APR 5 2012

ALC023-025-129-131-051730-
/O.CON.KMOB.SV.W.0047.000000T0000Z-120405T1730Z/
CHOCTAW AL-WASHINGTON AL-WILCOX AL-CLARKE AL-
1144 AM CDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT
FOR CLARKE...WESTERN WILCOX...NORTHERN WASHINGTON AND SOUTHEASTERN
CHOCTAW COUNTIES...

AT 1143 AM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A
LINE EXTENDING FROM 13 MILES SOUTH OF LINDEN TO 11 MILES NORTHEAST OF
CHATOM TO 14 MILES SOUTHEAST OF WAYNESBORO...MOVING EAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  THOMASVILLE AROUND NOON CDT...
  JACKSON AROUND 1205 PM CDT...
  PINE HILL AROUND 1210 PM CDT...
  GROVE HILL AROUND 1215 PM CDT...
  YELLOW BLUFF AROUND 1220 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
THURSDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3221 8737 3216 8728 3179 8752 3148 8786
      3152 8846 3161 8846 3174 8825 3199 8806
      3199 8772 3201 8763 3212 8763 3214 8753
      3226 8753 3228 8750 3228 8745
TIME...MOT...LOC 1643Z 285DEG 31KT 3212 8781 3166 8813
          3155 8844

$$

PURDY

134 
WWUS54 KMOB 051708
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1208 PM CDT THU APR 5 2012

ALC023-051717-
/O.CAN.KMOB.SV.W.0047.000000T0000Z-120405T1730Z/
CHOCTAW AL-
1208 PM CDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
SOUTHEASTERN CHOCTAW COUNTY...

AT 1207 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTHEASTERN
CHOCTAW COUNTY HAS MOVED OUT OF THE COUNTY...THUS THE SEVERE 
THUNDERSTORM WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
THURSDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3216 8728 3179 8752 3148 8786 3152 8837
      3154 8837 3165 8804 3199 8772 3201 8763
      3212 8763 3214 8753 3226 8753 3227 8751
      3228 8745
TIME...MOT...LOC 1707Z 285DEG 31KT 3207 8757 3161 8790
          3150 8821

$$

ALC025-129-131-051730-
/O.CON.KMOB.SV.W.0047.000000T0000Z-120405T1730Z/
WASHINGTON AL-WILCOX AL-CLARKE AL-
1208 PM CDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT
FOR NORTHERN CLARKE...WESTERN WILCOX AND NORTHERN WASHINGTON
COUNTIES...

AT 1207 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A
LINE EXTENDING FROM 13 MILES NORTHEAST OF THOMASVILLE TO JACKSON TO 2
MILES SOUTHWEST OF CHATOM...MOVING EAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  YELLOW BLUFF AROUND 1220 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
THURSDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3216 8728 3179 8752 3148 8786 3152 8837
      3154 8837 3165 8804 3199 8772 3201 8763
      3212 8763 3214 8753 3226 8753 3227 8751
      3228 8745
TIME...MOT...LOC 1707Z 285DEG 31KT 3207 8757 3161 8790
          3150 8821

$$

PURDY

000 
WWUS54 KMOB 051730
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1230 PM CDT THU APR 5 2012

ALC025-129-131-051739-
/O.EXP.KMOB.SV.W.0047.000000T0000Z-120405T1730Z/
WASHINGTON AL-WILCOX AL-CLARKE AL-
1230 PM CDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
NORTHERN CLARKE...WESTERN WILCOX AND NORTHERN WASHINGTON COUNTIES...

AT 1230 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHERN
CLARKE...WESTERN WILCOX AND NORTHERN WASHINGTON COUNTIES HAS WEAKENED
TO BELOW SEVERE LIMITS...THUS THE SEVERE THUNDERSTORM WARNING WAS
ALLOWED TO EXPIRE AT 1230 PM CDT.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

ALTHOUGH THIS WARNING HAS EXPIRED...ADDITIONAL STORMS MAY DEVELOP
REQUIRING NEW WARNINGS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
THURSDAY AFTERNOON FOR SOUTHWESTERN ALABAMA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3216 8728 3179 8752 3148 8786 3152 8837
      3154 8837 3165 8804 3199 8772 3201 8763
      3212 8763 3214 8753 3226 8753 3227 8751
      3228 8745
TIME...MOT...LOC 1729Z 285DEG 31KT 3202 8735 3156 8768
          3145 8799

$$

PURDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 8:23 AM CDT	Special Marine Warning	MOB		97 min
Apr 5, 10:24 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	66 min
Apr 5, 1:01 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Escambia, Monroe	59 min
Apr 5, 5:10 PM CDT	Special Marine Warning	MOB		65 min
Apr 5, 6:15 PM CDT	Special Marine Warning	MOB		60 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.