Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 196, NWS Mobile, AL

August 21, 2011Butler County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 21, 2011, 7:48 PM CDT for Butler County, Alabama. It was in force for 42 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 21, 2011, 7:48 PM CDT (00:48 UTC)
Expired
Aug 21, 2011, 8:30 PM CDT
In force
42 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Butler County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.8 hours before the alert went out and 150 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 00:00Z on 2011-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1328 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 00:00Z on 2011-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
1328 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1853 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
25 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.

887 
WUUS54 KMOB 220048
SVRMOB
ALC013-220130-
/O.NEW.KMOB.SV.W.0196.110822T0048Z-110822T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
748 PM CDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 830 PM CDT

* AT 741 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES NORTH OF GREENVILLE...OR
  3 MILES SOUTH OF FORT DEPOSIT...AND MOVING SOUTH AT 20 MPH.

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

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 121 AND 139.

&&

LAT...LON 3167 8651 3174 8678 3197 8667 3197 8645
      3196 8645 3196 8644
TIME...MOT...LOC 0048Z 016DEG 16KT 3192 8657

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 5:04 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia25 min
Aug 22, 5:20 PM CDTSevere Thunderstorm WarningMOBMonroe25 min
Aug 22, 5:39 PM CDTSevere Thunderstorm WarningMOBButler31 min
Aug 22, 5:53 PM CDTSpecial Marine WarningMOB52 min
Aug 22, 6:00 PM CDTSevere Thunderstorm WarningMOBEscambia, Monroe45 min
Aug 22, 6:21 PM CDTSevere Thunderstorm WarningMOBBaldwin16 min
Aug 22, 6:36 PM CDTSevere Thunderstorm WarningMOBEscambia39 min
Aug 22, 6:54 PM CDTSpecial Marine WarningMOB51 min
Aug 22, 6:55 PM CDTSevere Thunderstorm WarningMOBBaldwin38 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011Every severe thunderstorm warning in 2011

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.