Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 41, NWS Mobile, AL

March 30, 2012Covington County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 30, 2012, 3:13 PM CDT for Covington County, Crenshaw County, Alabama. It was in force for 20 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
Mar 30, 2012, 3:13 PM CDT (20:13 UTC)
Expired
Mar 30, 2012, 3:33 PM CDT
In force
20 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Covington County, AL, Crenshaw County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.2 hours before the alert went out and 180 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, Birmingham, AL at 12:00Z on 2012-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 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, Birmingham, AL at 12:00Z on 2012-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
36 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1106 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

461 
WUUS54 KMOB 302013
SVRMOB
ALC039-041-302045-
/O.NEW.KMOB.SV.W.0041.120330T2013Z-120330T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
313 PM CDT FRI MAR 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHERN CRENSHAW COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 345 PM CDT

* AT 311 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 13
  MILES NORTHEAST OF ANDALUSIA...OR NEAR DOZIER...AND MOVING
  NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GLENWOOD...           DOZIER...             BRANTLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3146 8639 3155 8644 3179 8620 3179 8615
      3178 8614 3166 8614 3163 8618 3162 8615
      3162 8614 3157 8614
TIME...MOT...LOC 2013Z 233DEG 26KT 3150 8637

$$
1 follow-up statement
458 
WWUS54 KMOB 302033
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
333 PM CDT FRI MAR 30 2012

ALC039-041-302043-
/O.CAN.KMOB.SV.W.0041.000000T0000Z-120330T2045Z/
COVINGTON AL-CRENSHAW AL-
333 PM CDT FRI MAR 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CRENSHAW AND NORTH
CENTRAL COVINGTON COUNTIES IS CANCELLED...

LAT...LON 3146 8639 3155 8644 3179 8620 3179 8615
      3178 8614 3166 8614 3163 8618 3162 8615
      3162 8614 3157 8614
TIME...MOT...LOC 2033Z 233DEG 26KT 3159 8623

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 2:55 AM CDTDense Fog AdvisoryMOBButler, Conecuh, Covington, Crenshaw, Escambia, Monroe6 hr
Mar 30, 1:54 PM CDTSevere Thunderstorm WarningMOBConecuh28 min
Mar 30, 5:39 PM CDTSevere Thunderstorm WarningMOBCovington40 min
Mar 30, 5:47 PM CDTTornado WarningMOBCovington31 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.