Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 99, NWS Mobile, AL

June 11, 20125 counties in Alabama; Greene County, Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Jun 11, 2012, 10:27 PM CDT for 5 counties in Alabama; Greene County, Perry County, Wayne County, Mississippi. It was in force for 63 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
Jun 11, 2012, 10:27 PM CDT (03:27 UTC)
Expired
Jun 11, 2012, 11:30 PM CDT
In force
63 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Clarke County, AL, Conecuh County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 113 km from the middle of the area, began a volume at 03:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 11, 8:37 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.5 hours before the alert went out and 201 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, Jackson, MS at 00:00Z on 2012-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2745 joules per kilogram.LCLEL10008507005003002001001 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, Jackson, MS at 00:00Z on 2012-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
2745 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1430 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

691 
WUUS54 KMOB 120327
SVRMOB
ALC025-035-099-129-131-MSC041-111-153-120430-
/O.NEW.KMOB.SV.W.0099.120612T0327Z-120612T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1027 PM CDT MON JUN 11 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CONECUH COUNTY IN SOUTH CENTRAL ALABAMA...
  MONROE COUNTY IN SOUTH CENTRAL ALABAMA...
  WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
  GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  CLARKE COUNTY IN SOUTHWEST ALABAMA...
  WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 1130 PM CDT

* AT 1023 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF
  PRODUCING DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE
  EXTENDING FROM 13 MILES WEST OF GREENVILLE TO 9 MILES SOUTHEAST OF
  HATTIESBURG...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SIMS CHAPEL...        ROCKVILLE...          HOBSON...
  WAYNESBORO...         STATE LINE...         CLARA...
  BUCKATUNNA...         MCLAIN...             LEAKESVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT
TUESDAY MORNING FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3144 8895 3160 8895 3174 8847 3170 8846
      3170 8809 3176 8810 3177 8816 3182 8818
      3208 8720 3205 8685 3196 8685 3196 8691
      3155 8688 3097 8913 3143 8915
TIME...MOT...LOC 0328Z 301DEG 26KT 3185 8678 3121 8917

$$
1 follow-up statement
513 
WWUS54 KMOB 120427
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1127 PM CDT MON JUN 11 2012

ALC025-035-099-129-131-MSC041-111-153-120437-
/O.EXP.KMOB.SV.W.0099.000000T0000Z-120612T0430Z/
CONECUH AL-MONROE AL-WASHINGTON AL-WILCOX AL-WAYNE MS-PERRY MS-
GREENE MS-CLARKE AL-
1127 PM CDT MON JUN 11 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
CLARKE...GREENE...PERRY...SOUTHERN WAYNE...WILCOX...WASHINGTON...
MONROE AND NORTH CENTRAL CONECUH COUNTIES...

AT 1123 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR CLARKE...
GREENE...PERRY...SOUTHERN WAYNE...WILCOX...WASHINGTON...MONROE AND
NORTH CENTRAL CONECUH COUNTIES HAS MOVED OUT OF THE COUNTY...THUS THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 1130 PM CDT.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT
TUESDAY MORNING FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

LAT...LON 3144 8895 3160 8895 3174 8847 3170 8846
      3170 8809 3176 8810 3177 8816 3182 8818
      3208 8720 3205 8685 3196 8685 3196 8691
      3155 8688 3097 8913 3143 8915
TIME...MOT...LOC 0427Z 301DEG 26KT 3162 8635 3099 8874

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 8:43 PM CDTSevere Thunderstorm WarningMOBChoctaw62 min
Jun 11, 9:10 PM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke65 min
Jun 11, 9:55 PM CDTFlash Flood WarningMOBChoctaw, Clarke3 hr
Jun 11, 11:05 PM CDTSevere Thunderstorm WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington55 min
Jun 11, 11:13 PM CDTSpecial Marine WarningMOB2 hr
Jun 12, 1:16 AM CDTSpecial Marine WarningMOB89 min
Jun 12, 5:06 PM CDTRiver Flood WarningMOBBaldwin19 hr
Jun 12, 5:42 PM CDTRiver Flood WarningMOBBaldwin27 hr
Jun 11, 11:27 PM CDTSevere Thunderstorm WarningMOBGeorge, Greene, Perry, Stone40 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Severe Thunderstorm Warnings in Mississippi, 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; radar from the NEXRAD Level II archive.