Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Mobile, AL

January 21, 2012Butler County, Crenshaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jan 21, 2012, 2:12 PM CST for Butler County, Crenshaw County, Alabama. It was in force for 48 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jan 21, 2012, 2:12 PM CST (20:12 UTC)
Expired
Jan 21, 2012, 3:00 PM CST
In force
48 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Butler County, AL, Crenshaw County, AL

What was reported inside it

TimeReportWhereRemark
Jan 21, 2:25 PM CSTHAIL 1Wald, ALDIME TO QUARTER SIZE HAIL REPORTED ALONG HIGHWAY 31 SOUTH OF GREENVILLE. TIME RADAR ESTIMATED.
Jan 21, 2:50 PM CSTHAIL 16 Sw Greenville, AL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.2 hours before the alert went out and 160 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 2012-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1141 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 2012-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.19395878Sfc1 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
1141 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
514 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
1.2
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

775 
WUUS54 KMOB 212012
SVRMOB
ALC013-041-212100-
/O.NEW.KMOB.SV.W.0001.120121T2012Z-120121T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
212 PM CST SAT JAN 21 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 300 PM CST

* AT 211 PM CST...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 10
  MILES WEST OF GREENVILLE...OR 5 MILES NORTHWEST OF CHAPMAN...AND
  MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  I65 AND AL 10...      GREENVILLE...         CHAPMAN...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 118 AND 129.

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 3181 8630 3155 8641 3175 8686 3185 8681
TIME...MOT...LOC 2011Z 283DEG 26KT 3177 8675

$$

JP
1 follow-up statement
056 
WWUS54 KMOB 212034
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
234 PM CST SAT JAN 21 2012

ALC013-041-212100-
/O.CON.KMOB.SV.W.0001.000000T0000Z-120121T2100Z/
BUTLER AL-CRENSHAW AL-
234 PM CST SAT JAN 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CST
FOR WEST CENTRAL CRENSHAW AND EAST CENTRAL BUTLER COUNTIES...

AT 234 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WALD...OR NEAR GREENVILLE...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MASHVILLE...GLASGOW...HALSO MILL...MIDWAY...SARDIS...PIGEON CREEK...
CENTER RIDGE...MOODYS CROSSROADS...ROBINSON CROSSROADS...MULBERRY...
MERRILL MILL...IVY CREEK...CHEROKEE VILLAGE AND CENTENARY

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 3172 8669 3181 8664 3183 8649 3181 8630
      3155 8641
TIME...MOT...LOC 2034Z 286DEG 24KT 3175 8660

$$

JP

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 20, 6:40 PM CSTMarine Dense Fog AdvisoryMOB15 hr
Jan 20, 6:42 PM CSTDense Fog AdvisoryMOB12 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.