Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 46, NWS Mobile, AL

April 15, 2011Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 15, 2011, 7:36 PM CDT for Wilcox County, Alabama. It was in force for 39 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
Apr 15, 2011, 7:36 PM CDT (00:36 UTC)
Expired
Apr 15, 2011, 8:15 PM CDT
In force
39 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 126 km from the middle of the area, began a volume at 00:36 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
Apr 15, 11:21 AM CDTTornado WatchSPC9 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.6 hours before the alert went out and 252 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 2011-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 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, Jackson, MS at 00:00Z on 2011-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897117Sfc1 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
173 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1488 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

923 
WUUS54 KMOB 160036
SVRMOB
ALC131-160115-
/O.NEW.KMOB.SV.W.0046.110416T0036Z-110416T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
736 PM CDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 735 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 21 MILES WEST OF SELMONT-WEST
  SELMONT TO 16 MILES NORTHWEST OF CAMDEN TO 11 MILES SOUTH OF       
  LINDEN...AND MOVING NORTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ALBERTA AROUND 745 PM CDT...
  CARLEYS AROUND 800 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.

&&

LAT...LON 3225 8741 3223 8737 3221 8736 3221 8732
      3215 8725 3210 8721 3210 8719 3208 8718
      3208 8763 3212 8763 3214 8762 3215 8753
      3228 8752 3228 8743
TIME...MOT...LOC 0036Z 231DEG 21KT 3245 8735 3221 8741
          3215 8778

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 7:14 PM CDTTornado WarningMOBWashington36 min
Apr 15, 7:24 PM CDTTornado Warning EmergencyMOBMobile, Washington51 min
Apr 15, 7:39 PM CDTTornado WarningMOBClarke, Monroe, Wilcox29 min
Apr 15, 7:54 PM CDTTornado WarningMOBClarke, Monroe, Wilcox51 min
Apr 15, 8:11 PM CDTTornado Warning EmergencyMOBWashington49 min
Apr 15, 8:28 PM CDTTornado WarningMOBWashington47 min
Apr 15, 8:50 PM CDTTornado WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington55 min
Apr 15, 9:15 PM CDTSevere Thunderstorm WarningMOBClarke, Mobile, Washington45 min
Apr 15, 9:18 PM CDTFlash Flood WarningMOBWashington117 min
Apr 15, 9:38 PM CDTTornado WarningMOBConecuh, Monroe52 min
Apr 15, 9:41 PM CDTTornado WarningMOBClarke, Washington49 min
Apr 15, 9:59 PM CDTSevere Thunderstorm WarningMOBBaldwin, Clarke, Mobile, Monroe, Washington61 min
Apr 15, 10:05 PM CDTTornado WarningMOBBaldwin, Clarke, Mobile, Monroe, Washington55 min
Apr 15, 10:24 PM CDTTornado WarningMOBButler, Clarke, Conecuh, Monroe, Wilcox51 min
Apr 15, 10:32 PM CDTTornado WarningMOBBaldwin, Mobile33 min
Apr 15, 10:56 PM CDTSevere Thunderstorm WarningMOBBaldwin, Conecuh, Escambia, Mobile, Monroe64 min
Apr 15, 10:59 PM CDTTornado WarningMOBBaldwin, Conecuh, Escambia, Monroe61 min
Apr 15, 11:10 PM CDTTornado WarningMOBButler, Crenshaw16 min
Apr 15, 11:33 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw42 min
Apr 15, 11:45 PM CDTTornado WarningMOBConecuh, Covington, Escambia60 min
Apr 16, 12:00 AM CDTSevere Thunderstorm WarningMOBButler, Conecuh, Covington, Crenshaw60 min
Apr 16, 12:11 AM CDTSevere Thunderstorm WarningMOBCrenshaw32 min
Apr 16, 12:38 AM CDTTornado WarningMOBCovington52 min
Apr 16, 1:01 AM CDTSevere Thunderstorm WarningMOBCovington33 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; radar from the NEXRAD Level II archive.