Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 162, NWS Mobile, AL

July 31, 2012Butler County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 31, 2012, 7:54 AM CDT for Butler County, Crenshaw County, Alabama. It was in force for 23 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 31, 2012, 7:54 AM CDT (12:54 UTC)
Expired
Jul 31, 2012, 8:17 AM CDT
In force
23 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Butler County, AL, Crenshaw County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 0.9 hours before the alert went out and 151 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 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 374 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 km3 km6 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
374 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
636 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
271 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.5

Open this sounding in Storm Lab

The text

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

054 
WUUS54 KMOB 311254
SVRMOB
ALC013-041-311400-
/O.NEW.KMOB.SV.W.0162.120731T1254Z-120731T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
754 AM CDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BUTLER COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHERN CRENSHAW COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 900 AM CDT

* AT 749 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 GREENVILLE TO 16 MILES NORTH OF LUVERNE...AND
  MOVING SOUTH AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RUTLEDGE...           PETREY...             LUVERNE...
  I65 AND AL 185...     I65 AND AL 10...      GREENVILLE...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 126 AND 139.

LAT...LON 3183 8618 3181 8620 3179 8618 3165 8620
      3166 8664 3197 8672 3197 8641 3202 8641
      3204 8630 3197 8629 3197 8619 3196 8618
      3190 8617
TIME...MOT...LOC 1254Z 344DEG 39KT 3178 8662 3188 8635

$$
1 follow-up statement
113 
WWUS54 KMOB 311317
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
817 AM CDT TUE JUL 31 2012

ALC013-041-311327-
/O.CAN.KMOB.SV.W.0162.000000T0000Z-120731T1400Z/
BUTLER AL-CRENSHAW AL-
817 AM CDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR NORTHERN
CRENSHAW AND NORTHEASTERN BUTLER COUNTIES...

AT 813 AM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHERN
CRENSHAW AND NORTHEASTERN BUTLER COUNTIES HAS WEAKENED TO BELOW
SEVERE LIMITS...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3183 8618 3181 8620 3179 8618 3165 8620
      3166 8664 3197 8672 3197 8641 3202 8641
      3204 8630 3197 8629 3197 8619 3196 8618
      3190 8617
TIME...MOT...LOC 1317Z 344DEG 39KT 3154 8654 3164 8627

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:40 PM CDTSevere Thunderstorm WarningMOBCovington51 min
Jul 30, 8:21 PM CDTSevere Thunderstorm WarningMOBEscambia25 min
Jul 31, 4:33 AM CDTSevere Thunderstorm WarningMOBButler, Crenshaw87 min
Jul 31, 7:24 AM CDTSevere Thunderstorm WarningMOBButler, Wilcox66 min
Jul 31, 8:15 AM CDTSpecial Marine WarningMOB60 min
Jul 31, 8:54 AM CDTAreal Flood AdvisoryMOBWilcox2 hr
Jul 31, 9:14 AM CDTSpecial Marine WarningMOB91 min
Jul 31, 9:32 AM CDTFlash Flood WarningMOBWilcox4 hr
Jul 31, 10:47 AM CDTSpecial Marine WarningMOB58 min
Jul 31, 11:52 AM CDTSpecial Marine WarningMOB83 min
Jul 31, 2:41 PM CDTSpecial Marine WarningMOB94 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.