Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 183, NWS Mobile, AL

August 16, 2012Clarke County, Monroe County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 16, 2012, 2:35 PM CDT for Clarke County, Monroe County, Alabama. It was in force for 30 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 16, 2012, 2:35 PM CDT (19:35 UTC)
Expired
Aug 16, 2012, 3:05 PM CDT
In force
30 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Clarke County, AL, Monroe County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.6 hours before the alert went out and 176 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 2012-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 761 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 2012-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
761 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
1023 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
59 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.

562 
WUUS54 KMOB 161935
SVRMOB
ALC025-099-162030-
/O.NEW.KMOB.SV.W.0183.120816T1935Z-120816T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
235 PM CDT THU AUG 16 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  EAST CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 330 PM CDT

* AT 231 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 15 MILES EAST OF GROVE HILL...OR 11
  MILES EAST OF WHATLEY...AND MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PETERMAN...           MONROEVILLE...

LAT...LON 3171 8715 3147 8728 3166 8766 3182 8757
TIME...MOT...LOC 1935Z 295DEG 9KT 3170 8751

$$
1 follow-up statement
779 
WWUS54 KMOB 162005
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
305 PM CDT THU AUG 16 2012

ALC025-099-162015-
/O.CAN.KMOB.SV.W.0183.000000T0000Z-120816T2030Z/
MONROE AL-CLARKE AL-
305 PM CDT THU AUG 16 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EAST
CENTRAL CLARKE AND NORTHERN MONROE COUNTIES...

AT 304 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR EAST CENTRAL
CLARKE AND NORTHERN MONROE COUNTIES HAS WEAKENED TO BELOW SEVERE
LIMITS...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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

LAT...LON 3171 8715 3147 8728 3166 8766 3182 8757
TIME...MOT...LOC 2005Z 295DEG 9KT 3167 8743

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 10:09 AM CDTSpecial Marine WarningMOB96 min
Aug 16, 12:46 PM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke33 min
Aug 16, 12:59 PM CDTSevere Thunderstorm WarningMOBChoctaw, Washington22 min
Aug 16, 1:36 PM CDTSevere Thunderstorm WarningMOBChoctaw22 min
Aug 16, 3:34 PM CDTSevere Thunderstorm WarningMOBWilcox29 min
Aug 16, 4:22 PM CDTSpecial Marine WarningMOB53 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.