Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 121, NWS Mobile, AL

June 11, 2011Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jun 11, 2011, 5:09 PM CDT for Wilcox County, Alabama. It was in force for 36 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, 2011, 5:09 PM CDT (22:09 UTC)
Expired: Jun 11, 2011, 5:45 PM CDT
In force: 36 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 139 km from the middle of the area, began a volume at 22:12 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.2 hours before the alert went out and 140 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 835 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 0 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.

495 
WUUS54 KMOB 112209
SVRMOB
ALC131-112245-
/O.NEW.KMOB.SV.W.0121.110611T2209Z-110611T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
509 PM CDT SAT JUN 11 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 545 PM CDT

* AT 504 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 10 MILES EAST OF CAMDEN...OR 6
  MILES NORTHWEST OF OAK HILL...AND MOVING SOUTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OAK HILL AROUND 520 PM CDT...
  WATSONVILLE AROUND 540 PM CDT...

&&

LAT...LON 3206 8716 3206 8715 3206 8706 3201 8699
      3184 8712 3183 8720 3184 8722 3184 8727
      3192 8736 3209 8718
TIME...MOT...LOC 2209Z 030DEG 14KT 3199 8714

$$

1 follow-up statement

142 
WWUS54 KMOB 112232
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
532 PM CDT SAT JUN 11 2011

ALC131-112245-
/O.CON.KMOB.SV.W.0121.000000T0000Z-110611T2245Z/
WILCOX AL-
532 PM CDT SAT JUN 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL WILCOX COUNTY...

AT 528 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR OAK HILL...OR 12 MILES
EAST OF CAMDEN...MOVING SOUTHWEST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NEENAH BY 540 PM CDT...
  WATSONVILLE AND 6 MILES EAST OF FATAMA BY 545 PM CDT...

LAT...LON 3206 8716 3206 8715 3206 8706 3201 8699
      3184 8712 3183 8720 3184 8722 3184 8727
      3192 8736 3209 8718
TIME...MOT...LOC 2232Z 030DEG 14KT 3192 8711

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:42 PM CDT	Severe Thunderstorm Warning	MOB	Covington	48 min
Jun 10, 8:57 PM CDT	Severe Thunderstorm Warning	MOB	Crenshaw	33 min
Jun 11, 4:12 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington	48 min
Jun 11, 4:17 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	43 min
Jun 11, 4:25 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Escambia, Monroe	50 min
Jun 11, 4:48 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	27 min
Jun 11, 4:54 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Monroe, Wilcox	36 min
Jun 11, 5:14 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	31 min
Jun 11, 5:23 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Monroe	52 min
Jun 11, 5:37 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Monroe, Wilcox	38 min
Jun 11, 5:47 PM CDT	Areal Flood Advisory	MOB	Butler, Conecuh, Monroe, Wilcox	118 min
Jun 11, 5:51 PM CDT	Areal Flood Advisory	MOB	Clarke, Monroe	114 min
Jun 11, 6:12 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe	33 min
Jun 11, 6:40 PM CDT	Areal Flood Advisory	MOB	Clarke	2 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every 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; radar from the NEXRAD Level II archive.