Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 175, NWS Mobile, AL

July 2, 2011Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 2, 2011, 2:28 PM CDT for Mobile County, Alabama. It was in force for 31 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 2, 2011, 2:28 PM CDT (19:28 UTC)
Expired
Jul 2, 2011, 2:59 PM CDT
In force
31 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 26 km from the middle of the area, began a volume at 19:29 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 150 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 2011-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2612 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 2011-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
2612 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
17 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.

789 
WUUS54 KMOB 021928
SVRMOB
ALC097-022015-
/O.NEW.KMOB.SV.W.0175.110702T1928Z-110702T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
228 PM CDT SAT JUL 2 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...
  THIS INCLUDES THE CITIES OF...TILLMANS CORNER...THEODORE...GRAND
  BAY...BAYOU LA BATRE...

* UNTIL 315 PM CDT

* AT 225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  THEODORE...OR NEAR BELLE FONTAINE...AND MOVING SOUTHWEST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BAYOU LA BATRE AND GRAND BAY AROUND 315 PM CDT...

THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 4 AND 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3034 8818 3036 8820 3036 8821 3048 8836
      3061 8819 3054 8808 3052 8807 3052 8809
      3048 8809 3047 8810 3044 8810
TIME...MOT...LOC 1927Z 042DEG 7KT 3051 8816

$$
2 follow-up statements
444 
WWUS54 KMOB 021941
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
241 PM CDT SAT JUL 2 2011

ALC097-022015-
/O.CON.KMOB.SV.W.0175.000000T0000Z-110702T2015Z/
MOBILE AL-
241 PM CDT SAT JUL 2 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR SOUTH CENTRAL MOBILE COUNTY...

AT 239 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR LAURENDINE...OR NEAR THEODORE...MOVING SOUTHWEST AT 10
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAINT ELMO BY 255 PM CDT...
  DIXON CORNER AND BAYOU LA BATRE BY 305 PM CDT...
  GRAND BAY BY 315 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3034 8818 3036 8820 3036 8821 3048 8836
      3061 8819 3054 8808 3052 8807 3052 8809
      3048 8809 3047 8810 3044 8810
TIME...MOT...LOC 1941Z 054DEG 9KT 3050 8820

$$
568 
WWUS54 KMOB 021959
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
259 PM CDT SAT JUL 2 2011

ALC097-022009-
/O.CAN.KMOB.SV.W.0175.000000T0000Z-110702T2015Z/
MOBILE AL-
259 PM CDT SAT JUL 2 2011

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

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. 

LAT...LON 3034 8818 3036 8820 3036 8821 3048 8836
      3061 8819 3054 8808 3052 8807 3052 8809
      3048 8809 3047 8810 3044 8810
TIME...MOT...LOC 1959Z 054DEG 9KT 3047 8824

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 12:59 PM CDTSevere Thunderstorm WarningMOBMobile31 min
Jul 2, 1:03 PM CDTSpecial Marine WarningMOB42 min
Jul 2, 1:12 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia26 min
Jul 2, 1:55 PM CDTSevere Thunderstorm WarningMOBBaldwin35 min
Jul 2, 2:37 PM CDTAreal Flood AdvisoryMOBBaldwin53 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.