Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS Mobile, AL

April 3, 2012Choctaw County, Mobile County, Washington County, Alabama; George County, Greene County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 3, 2012, 11:07 PM CDT for Choctaw County, Mobile County, Washington County, Alabama; George County, Greene County, Wayne County, Mississippi. It was in force for 38 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 3, 2012, 11:07 PM CDT (04:07 UTC)
Expired
Apr 3, 2012, 11:45 PM CDT
In force
38 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Choctaw County, AL, Mobile County, AL, Washington County, AL, George County, MS, Greene County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 90 km from the middle of the area, began a volume at 04:10 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 4.1 hours before the alert went out and 201 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, Slidell Radar S, LA at 00:00Z on 2012-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2379 joules per kilogram.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 00:00Z on 2012-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
2379 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1042 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
70 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.

481 
WUUS54 KMOB 040407
SVRMOB
ALC023-097-129-MSC039-041-153-040500-
/O.NEW.KMOB.SV.W.0045.120404T0407Z-120404T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1107 PM CDT TUE APR 3 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHWESTERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL MIDNIGHT CDT

* AT 1106 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE
  EXTENDING FROM 5 MILES SOUTHEAST OF WAYNESBORO TO 11 MILES NORTH OF
  LEAKESVILLE TO 8 MILES NORTHWEST OF LUCEDALE...AND MOVING EAST AT
  30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SIMS CHAPEL...        MOWA CHOCTAW RESERVATION...
  MOVICO...             HOBSON...             MOUNT VERNON...
  GULFCREST...          CITRONELLE...         CHUNCHULA...
  CALVERT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE WINDS ARE OCCURRING WELL AHEAD OF THE THUNDERSTORM ACTIVITY. 
NUMEROUS TREES HAVE BEEN REPORTED DOWN IN PERRY COUNTY MISSISSIPPI. 
PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A 
STRONG BUILDING BUT AWAY FROM WINDOWS.

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

&&

LAT...LON 3182 8883 3182 8818 3176 8815 3176 8811
      3172 8809 3160 8807 3158 8802 3157 8804
      3155 8800 3140 8791 3139 8794 3139 8792
      3126 8799 3126 8797 3116 8796 3092 8800
      3090 8884
TIME...MOT...LOC 0407Z 283DEG 27KT 3161 8857 3131 8853
          3103 8864

$$
1 follow-up statement
170 
WWUS54 KMOB 040445
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1145 PM CDT TUE APR 3 2012

ALC023-097-129-MSC039-041-153-040454-
/O.CAN.KMOB.SV.W.0045.000000T0000Z-120404T0500Z/
CHOCTAW AL-WASHINGTON AL-WAYNE MS-GREENE MS-GEORGE MS-MOBILE AL-
1145 PM CDT TUE APR 3 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR NORTHERN
MOBILE...NORTHERN GEORGE...GREENE...WAYNE...WASHINGTON AND
SOUTHWESTERN CHOCTAW COUNTIES...

AT 1141 PM CDT...THE STORMS THAT PROMPTED THE WARNING FOR NORTHERN
MOBILE...NORTHERN GEORGE...GREENE...WAYNE...WASHINGTON AND
SOUTHWESTERN CHOCTAW COUNTIES HAS WEAKENED TO BELOW SEVERE LIMITS...
THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

WIND GUSTS OF 30 TO 40 MPH ARE STILL POSSIBLE WITH THESE STORMS. 

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

LAT...LON 3182 8883 3182 8818 3176 8815 3176 8811
      3172 8809 3160 8807 3158 8802 3157 8804
      3155 8800 3140 8791 3139 8794 3139 8792
      3126 8799 3126 8797 3116 8796 3092 8800
      3090 8884
TIME...MOT...LOC 0444Z 283DEG 27KT 3155 8825 3125 8821
          3097 8832

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 2:59 AM CDTSpecial Marine WarningMOB91 min
Apr 4, 4:23 AM CDTSpecial Marine WarningMOB82 min
Apr 4, 8:16 AM CDTSpecial Marine WarningMOB89 min
Apr 4, 9:36 AM CDTSpecial Marine WarningMOB84 min
Apr 4, 11:47 AM CDTSpecial Marine WarningMOB118 min
Apr 3, 10:25 PM CDTSevere Thunderstorm WarningMOBGeorge, Greene, Perry, Stone, Wayne50 min
Apr 4, 10:38 AM CDTRiver Flood WarningMOBGeorge, Greene, Perry48 hr

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.