Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 160, NWS Mobile, AL

July 31, 2012Butler County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 31, 2012, 4:33 AM CDT for Butler County, Crenshaw County, Alabama. It was in force for 87 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, 4:33 AM CDT (09:33 UTC)
Expired: Jul 31, 2012, 6:00 AM CDT
In force: 87 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 00:00Z, 9.6 hours before the alert went out and 155 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: 771 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1852 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 145 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.

353 
WUUS54 KMOB 310933
SVRMOB
ALC013-041-311100-
/O.NEW.KMOB.SV.W.0160.120731T0933Z-120731T1100Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 600 AM CDT

* AT 429 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 17 MILES NORTH
  OF GREENVILLE...OR 7 MILES SOUTH OF MOSSES...AND MOVING SOUTH AT 25
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  RUTLEDGE...           LUVERNE...            BRANTLEY...
  I65 AND CR 7...       I65 AND AL 185...     I65 AND AL 106...
  I65 AND AL 10...      GREENVILLE...         GEORGIANA...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 107 AND 139.

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.

&&

LAT...LON 3155 8617 3154 8686 3197 8682 3197 8641
      3205 8640 3206 8632
TIME...MOT...LOC 0932Z 356DEG 23KT 3206 8664

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:40 PM CDT	Severe Thunderstorm Warning	MOB	Covington	51 min
Jul 30, 8:21 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	25 min
Jul 31, 7:24 AM CDT	Severe Thunderstorm Warning	MOB	Butler, Wilcox	66 min
Jul 31, 7:54 AM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	23 min
Jul 31, 8:15 AM CDT	Special Marine Warning	MOB		60 min
Jul 31, 8:54 AM CDT	Areal Flood Advisory	MOB	Wilcox	2 hr
Jul 31, 9:14 AM CDT	Special Marine Warning	MOB		91 min
Jul 31, 9:32 AM CDT	Flash Flood Warning	MOB	Wilcox	4 hr
Jul 31, 10:47 AM CDT	Special Marine Warning	MOB		58 min
Jul 31, 11:52 AM CDT	Special Marine Warning	MOB		83 min
Jul 31, 2:41 PM CDT	Special Marine Warning	MOB		94 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.