Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS Mobile, AL

May 31, 2012Butler County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 31, 2012, 3:02 PM CDT for Butler County, Alabama. It was in force for 58 min. 1 report 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
May 31, 2012, 3:02 PM CDT (20:02 UTC)
Expired
May 31, 2012, 4:00 PM CDT
In force
58 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Butler County, AL

What was reported inside it

TimeReportWhereRemark
May 31, 3:15 PM CDTTSTM WND DMG2 S Greenville, ALTREE FELL ON POWER LINES.

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, 8.0 hours before the alert went out and 145 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 2012-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.193958Sfc1 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
12 J/kg
Mixed-layer CIN
-234 J/kg
Mixed-layer LCL
1911 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
122 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.

554 
WUUS54 KMOB 312002
SVRMOB
ALC013-312100-
/O.NEW.KMOB.SV.W.0086.120531T2002Z-120531T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
302 PM CDT THU MAY 31 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 400 PM CDT

* AT 300 PM 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 18 MILES NORTHWEST OF GREENVILLE TO 11 MILES
  WEST OF GREENVILLE...AND MOVING EAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  I65 AND AL 185...     I65 AND AL 10...      GREENVILLE...
  FOREST HOME...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 123 AND 139.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3175 8652 3177 8688 3188 8691 3196 8691
      3197 8674 3197 8650 3196 8650
TIME...MOT...LOC 2002Z 263DEG 9KT 3201 8683 3182 8678

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:15 PM CDTSevere Thunderstorm WarningMOBChoctaw60 min
May 31, 4:40 PM CDTSevere Thunderstorm WarningMOBWashington50 min
May 31, 5:05 PM CDTSevere Thunderstorm WarningMOBClarke, Washington40 min
May 31, 5:59 PM CDTSevere Thunderstorm WarningMOBChoctaw46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.