Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 57, NWS Mobile, AL

May 21, 2012Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 21, 2012, 2:54 PM CDT for Monroe County, Wilcox County, Alabama. It was in force for 51 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, 2:54 PM CDT (19:54 UTC)
Expired
May 21, 2012, 3:45 PM CDT
In force
51 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Monroe County, AL, Wilcox County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.9 hours before the alert went out and 153 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.

205 
WUUS54 KMOB 211954
SVRMOB
ALC099-131-212045-
/O.NEW.KMOB.SV.W.0057.120521T1954Z-120521T2045Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTH CENTRAL WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 345 PM CDT

* AT 250 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 6 MILES SOUTH
  OF CAMDEN...OR 5 MILES NORTHEAST OF COY...AND MOVING SOUTHEAST AT
  25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BEATRICE...
  PEBBLE HILL...
  WATSONVILLE...
  

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 3181 8698 3167 8719 3192 8740 3202 8730
TIME...MOT...LOC 1953Z 315DEG 20KT 3192 8730

$$
1 follow-up statement
404 
WWUS54 KMOB 212015
SVSMOB

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

ALC099-131-212045-
/O.CON.KMOB.SV.W.0057.000000T0000Z-120521T2045Z/
MONROE AL-WILCOX AL-
315 PM CDT MON MAY 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR SOUTH CENTRAL WILCOX AND NORTHEASTERN MONROE COUNTIES...

AT 314 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 11 MILES SOUTH
OF CAMDEN...OR 6 MILES EAST OF COY...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  BEATRICE...BUENA VISTA...AND NADAWAH.

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.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

&&

LAT...LON 3197 8723 3181 8698 3167 8719 3187 8736
TIME...MOT...LOC 2013Z 315DEG 20KT 3183 8723

$$

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, 3:04 PM CDTSevere Thunderstorm WarningMOBMobile19 min
May 21, 3:08 PM CDTSevere Thunderstorm WarningMOBButler, Conecuh, Monroe52 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.