Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 59, NWS Mobile, AL

May 21, 2012Butler County, Conecuh County, Monroe County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 21, 2012, 3:08 PM CDT for Butler County, Conecuh County, Monroe County, Alabama. It was in force for 52 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
May 21, 2012, 3:08 PM CDT (20:08 UTC)
Expired
May 21, 2012, 4:00 PM CDT
In force
52 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Butler County, AL, Conecuh County, AL, Monroe County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.1 hours before the alert went out and 167 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 2012-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 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 2012-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
468 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1309 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
-8 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.

410 
WUUS54 KMOB 212008
SVRMOB
ALC013-035-099-212100-
/O.NEW.KMOB.SV.W.0059.120521T2008Z-120521T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
308 PM CDT MON MAY 21 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL BUTLER COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTH CENTRAL CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHEASTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 400 PM CDT

* AT 304 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 23 MILES WEST
  OF GREENVILLE...OR 10 MILES EAST OF BEATRICE...AND MOVING SOUTHEAST
  AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  I65 AND AL 106...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 110 AND 117.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS AND LARGE 
HAIL. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY 
FROM WINDOWS.

&&

LAT...LON 3166 8670 3153 8697 3174 8708 3182 8697
TIME...MOT...LOC 2008Z 322DEG 12KT 3176 8698

$$
1 follow-up statement
753 
WWUS54 KMOB 212027
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
327 PM CDT MON MAY 21 2012

ALC013-035-099-212100-
/O.CON.KMOB.SV.W.0059.000000T0000Z-120521T2100Z/
BUTLER AL-CONECUH AL-MONROE AL-
327 PM CDT MON MAY 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR NORTHEASTERN MONROE...NORTH CENTRAL CONECUH AND WEST CENTRAL
BUTLER COUNTIES...

AT 322 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 16 MILES
SOUTHWEST OF GREENVILLE...OR 6 MILES NORTHWEST OF I65 AND AL 106...
MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  BEACON...I65 AND AL 106...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 110 AND 117.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DESTRUCTIVE HAIL AND DAMAGING
WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY
FROM WINDOWS.

&&

LAT...LON 3166 8670 3153 8697 3174 8708 3182 8697
TIME...MOT...LOC 2026Z 308DEG 10KT 3170 8683

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 2:03 PM CDTSpecial Marine WarningMOB87 min
May 21, 2:54 PM CDTSevere Thunderstorm WarningMOBMonroe, Wilcox51 min
May 21, 3:04 PM CDTSevere Thunderstorm WarningMOBMobile19 min
May 21, 3:11 PM CDTSpecial Marine WarningMOB59 min
May 21, 3:36 PM CDTSevere Thunderstorm WarningMOBButler, Clarke, Conecuh, Covington, Crenshaw, Monroe and 1 more54 min
May 21, 4:26 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia64 min
May 21, 4:32 PM CDTSpecial Marine WarningMOB88 min
May 21, 4:54 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia, Mobile51 min
May 21, 5:48 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia, Mobile57 min
May 21, 6:56 PM CDTSevere Thunderstorm WarningMOBBaldwin64 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.