Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 137, NWS Mobile, AL

June 16, 2011Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jun 16, 2011, 2:30 PM CDT for Washington County, Alabama. It was in force for 25 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 16, 2011, 2:30 PM CDT (19:30 UTC)
Expired: Jun 16, 2011, 2:55 PM CDT
In force: 25 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Washington County, AL

The radar

The Mobile radar (KMOB), 62 km from the middle of the area, began a volume at 19:33 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.5 hours before the alert went out and 181 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: 3053 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: -8 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.

026 
WUUS54 KMOB 161930
SVRMOB
ALC129-162015-
/O.NEW.KMOB.SV.W.0137.110616T1930Z-110616T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
230 PM CDT THU JUN 16 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 315 PM CDT

* AT 229 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 NORTHEAST OF
  CITRONELLE...OR 10 MILES SOUTHWEST OF MCINTOSH. THIS STORM WAS
  NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MCINTOSH AROUND 315 PM CDT...

&&

LAT...LON 3134 8824 3126 8801 3115 8807 3115 8828
      3118 8834
TIME...MOT...LOC 1931Z 299DEG 1KT 3121 8818

$$

1 follow-up statement

293 
WWUS54 KMOB 161955
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
255 PM CDT THU JUN 16 2011

ALC129-162005-
/O.CAN.KMOB.SV.W.0137.000000T0000Z-110616T2015Z/
WASHINGTON AL-
255 PM CDT THU JUN 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WASHINGTON
COUNTY IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. HOWEVER...WINDS GUSITNG TO 35 MPH ARE STILL POSSIBLE OVER 
THE TOPTON AREA.

LAT...LON 3134 8824 3126 8801 3115 8807 3115 8828
      3118 8834
TIME...MOT...LOC 1955Z 299DEG 1KT 3121 8817

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 9:37 AM CDT	Special Marine Warning	MOB		38 min
Jun 16, 10:07 AM CDT	Special Marine Warning	MOB		38 min
Jun 16, 11:45 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	30 min
Jun 16, 12:38 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	52 min
Jun 16, 1:21 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	39 min
Jun 16, 1:54 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	32 min
Jun 16, 2:05 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	25 min
Jun 16, 2:23 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	52 min
Jun 16, 2:33 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe	42 min
Jun 16, 2:36 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	39 min
Jun 16, 3:05 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	25 min
Jun 16, 3:08 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	22 min
Jun 16, 3:21 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	24 min
Jun 16, 3:22 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	23 min
Jun 16, 3:39 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	51 min
Jun 16, 3:48 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington, Escambia	42 min
Jun 16, 4:04 PM CDT	Severe Thunderstorm Warning	MOB	Covington	41 min
Jun 16, 4:45 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh	27 min
Jun 16, 4:52 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	38 min

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.