Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 170, NWS Mobile, AL

August 3, 2012Butler County, Conecuh County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 3, 2012, 4:40 PM CDT for Butler County, Conecuh County, Alabama. It was in force for 35 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
Aug 3, 2012, 4:40 PM CDT (21:40 UTC)
Expired
Aug 3, 2012, 5:15 PM CDT
In force
35 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Butler County, AL, Conecuh County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.7 hours before the alert went out and 185 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 2012-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1920 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 2012-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
1920 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
586 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
19 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.

039 
WUUS54 KMOB 032140
SVRMOB
ALC013-035-032215-
/O.NEW.KMOB.SV.W.0170.120803T2140Z-120803T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
440 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BUTLER COUNTY IN SOUTH CENTRAL ALABAMA...
  NORTHEASTERN CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 515 PM CDT

* AT 432 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS NEAR 60 MPH WAS LOCATED APPROXIMATELY 11 MILES NORTHEAST OF  
  EVERGREEN...AND WAS MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  I65 AND CR 7...       I65 AND AL 106...     I65 AND US 84...
  I65 AND CR 29...      I65 AND AL 83...      EVERGREEN...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 90 AND 114.

LAT...LON 3138 8704 3163 8708 3174 8681 3149 8670
TIME...MOT...LOC 2139Z 342DEG 11KT 3155 8687

$$
1 follow-up statement
274 
WWUS54 KMOB 032215
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
515 PM CDT FRI AUG 3 2012

ALC013-035-032224-
/O.EXP.KMOB.SV.W.0170.000000T0000Z-120803T2215Z/
BUTLER AL-CONECUH AL-
515 PM CDT FRI AUG 3 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
NORTHEASTERN CONECUH AND SOUTHWESTERN BUTLER COUNTIES...

AT 513 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHEASTERN
CONECUH AND SOUTHWESTERN BUTLER COUNTIES HAS WEAKENED TO BELOW SEVERE
LIMITS...THUS THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO
EXPIRE AT 515 PM CDT.

THE STORMS OVER CONECUH AND BUTLER COUNTIES WILL CONTINUE TO BE 
CAPABLE OF PRODUCING WIND GUSTS AROUND 45 MPH...SMALL HAIL AND 
FREQUENT LIGHTNING STRIKES.  

LAT...LON 3138 8704 3163 8708 3174 8681 3149 8670
TIME...MOT...LOC 2214Z 342DEG 11KT 3145 8683

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 3:22 PM CDTAreal Flood AdvisoryMOBMobile113 min
Aug 3, 3:33 PM CDTSevere Thunderstorm WarningMOBMobile42 min
Aug 3, 4:20 PM CDTSevere Thunderstorm WarningMOBCovington25 min
Aug 3, 5:12 PM CDTSevere Thunderstorm WarningMOBWashington20 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.