Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 132, NWS Mobile, AL

July 6, 2012Wayne County, Mississippi; Choctaw County, Clarke County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 6, 2012, 12:39 PM CDT for Wayne County, Mississippi; Choctaw County, Clarke County, Washington County, Alabama. It was in force for 51 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
Jul 6, 2012, 12:39 PM CDT (17:39 UTC)
Expired
Jul 6, 2012, 1:30 PM CDT
In force
51 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), 107 km from the middle of the area, began a volume at 17:41 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.7 hours before the alert went out and 195 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2012-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 747 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2012-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
747 J/kg
Mixed-layer CIN
-180 J/kg
Mixed-layer LCL
1412 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

736 
WUUS54 KMOB 061739
SVRMOB
ALC023-025-129-MSC153-061830-
/O.NEW.KMOB.SV.W.0132.120706T1739Z-120706T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1239 PM CDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  WESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...
  NORTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 130 PM CDT

* AT 1236 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING
  DAMAGING WINDS OVER 60 MPH WAS LOCATED 17 MILES NORTH OF CHATOM...
  OR 6 MILES SOUTHEAST OF SILAS...AND MOVING SOUTHWEST AT 15 MPH.
  ANOTHER SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
  OVER 60 MPH WAS LOCATED 13 MILES WEST OF GROVE HILL...ALSO MOVING
  SOUTHWEST AT 15 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         BUCKATUNNA...         SILAS...
  GILBERTOWN...         JACKSON...            COFFEEVILLE...
  WAGARVILLE...         SAINT STEPHENS...     MILLRY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

FREQUENT 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.

&&

LAT...LON 3180 8775 3128 8794 3141 8839 3164 8875
      3192 8845
TIME...MOT...LOC 1738Z 055DEG 14KT 3170 8825

$$
1 follow-up statement
864 
WWUS54 KMOB 061807
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
107 PM CDT FRI JUL 6 2012

ALC023-025-129-MSC153-061830-
/O.CON.KMOB.SV.W.0132.000000T0000Z-120706T1830Z/
CHOCTAW AL-WASHINGTON AL-WAYNE MS-CLARKE AL-
107 PM CDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT
FOR WESTERN CLARKE...EASTERN WAYNE...NORTHERN WASHINGTON AND SOUTHERN
CHOCTAW COUNTIES...

AT 105 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS OVER 60 MPH EXTENDED FROM 5 MILES NORTH OF GROVE HILL 
TO 18 MILES NORTHEAST OF CHATOM TO 7 MILES NORTHWEST OF 
CHATOM...MOVING SOUTH AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
MILLRY...
CHATOM...
COFFEEVILLE...
FRANKVILLE...
YARBO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3180 8775 3128 8794 3141 8839 3164 8875
      3192 8845
TIME...MOT...LOC 1803Z 022DEG 10KT 3176 8779 3169 8813
          3154 8834

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 12:49 AM CDTSevere Thunderstorm WarningMOBConecuh, Covington, Escambia41 min
Jul 6, 4:52 AM CDTSpecial Marine WarningMOB38 min
Jul 6, 5:28 AM CDTSpecial Marine WarningMOB92 min
Jul 6, 5:38 AM CDTSpecial Marine WarningMOB97 min
Jul 6, 7:03 AM CDTSpecial Marine WarningMOB87 min
Jul 6, 7:46 AM CDTSpecial Marine WarningMOB89 min
Jul 6, 8:38 AM CDTSpecial Marine WarningMOB82 min
Jul 6, 9:19 AM CDTSpecial Marine WarningMOB86 min
Jul 6, 9:38 AM CDTSpecial Marine WarningMOB85 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Severe Thunderstorm Warnings in Mississippi, 2012Every 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.