Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 182, NWS Mobile, AL

July 11, 2011Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 11, 2011, 5:04 PM CDT for Baldwin County, Mobile County, Alabama. It was in force for 43 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
Jul 11, 2011, 5:04 PM CDT (22:04 UTC)
Expired
Jul 11, 2011, 5:47 PM CDT
In force
43 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Mobile County, AL

The radar

The Mobile radar (KMOB), 24 km from the middle of the area, began a volume at 22:03 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, 10.1 hours before the alert went out and 160 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, Slidell Radar S, LA at 12:00Z on 2011-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2450 joules per kilogram.LCLLFCEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2011-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -53 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
2450 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
653 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
-27 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.

263 
WUUS54 KMOB 112204
SVRMOB
ALC003-097-112300-
/O.NEW.KMOB.SV.W.0182.110711T2204Z-110711T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
504 PM CDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF POINT CLEAR...
  SOUTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...TILLMANS CORNER...THEODORE...GRAND
  BAY...MOBILE...BAYOU LA BATRE...

* UNTIL 600 PM CDT

* AT 459 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM MOBILE TO 13 MILES NORTHWEST OF TILLMANS CORNER...AND MOVING
  SOUTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  I10 AND I65 AROUND 510 PM CDT...
  GRAND BAY AROUND 515 PM CDT...
  TILLMANS CORNER AROUND 520 PM CDT...
  THEODORE AROUND 525 PM CDT...
  BAYOU LA BATRE AND BELLE FONTAINE AROUND 535 PM CDT...
  POINT CLEAR AROUND 545 PM CDT...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 1 AND 30.

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 7.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3040 8841 3072 8842 3073 8800 3067 8797
      3067 8802 3065 8805 3054 8808 3050 8794
      3054 8791 3040 8785 3040 8790 3042 8792
      3050 8795 3053 8806 3052 8809 3040 8810
TIME...MOT...LOC 2204Z 303DEG 29KT 3066 8799 3066 8835

$$
1 follow-up statement
198 
WWUS54 KMOB 112247
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
547 PM CDT MON JUL 11 2011

ALC003-097-112257-
/O.CAN.KMOB.SV.W.0182.000000T0000Z-110711T2300Z/
BALDWIN AL-MOBILE AL-
547 PM CDT MON JUL 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MOBILE AND WEST
CENTRAL BALDWIN COUNTIES IS CANCELLED...

LAT...LON 3040 8841 3072 8842 3073 8800 3067 8797
      3067 8802 3065 8805 3054 8808 3050 8794
      3054 8791 3040 8785 3040 8790 3042 8792
      3050 8795 3053 8806 3052 8809 3040 8810
TIME...MOT...LOC 2247Z 303DEG 29KT 3047 8765 3047 8801

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 5:06 PM CDTSpecial Marine WarningMOB54 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.