Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 113, NWS Mobile, AL

August 1, 2013Mobile County, Alabama; George County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Aug 1, 2013, 5:03 PM CDT for Mobile County, Alabama; George County, Mississippi. It was in force for 57 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
Aug 1, 2013, 5:03 PM CDT (22:03 UTC)
Expired
Aug 1, 2013, 6:00 PM CDT
In force
57 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Mobile County, AL, George County, MS

The radar

The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 22:04 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 144 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 2013-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2188 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 2013-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.193958Sfc1 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
2188 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
749 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
29 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.

162 
WUUS54 KMOB 012203
SVRMOB
ALC097-MSC039-012300-
/O.NEW.KMOB.SV.W.0113.130801T2203Z-130801T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
503 PM CDT THU AUG 1 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GEORGE COUNTY IN SOUTHEAST MISSISSIPPI...
  SOUTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 600 PM CDT

* AT 459 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG
  A LINE EXTENDING FROM 11 MILES EAST OF LUCEDALE TO REGIONAL AIRPORT
  IN WEST MOBILE TO 5 MILES EAST OF TILLMANS CORNER...AND MOVING
  SOUTHWEST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  REGIONAL AIRPORT IN WEST MOBILE...          MIDTOWN MOBILE...
  CENTRAL DAUPHIN ISLAND...                   CODEN...
  TILLMANS CORNER...    THEODORE...           SEMMES...
  I10 AND I65...        GRAND BAY...

THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 1 AND 24.
THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 1 AND 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3023 8830 3026 8819 3036 8820 3037 8825
      3032 8826 3037 8826 3036 8832 3039 8833
      3039 8840 3073 8842 3074 8866 3106 8840
      3078 8819 3065 8804 3051 8809 3030 8813
      3032 8816 3031 8820 3024 8816 3024 8818
TIME...MOT...LOC 2203Z 032DEG 15KT 3094 8842 3066 8828
          3057 8810

$$
2 follow-up statements
621 
WWUS54 KMOB 012224
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
524 PM CDT THU AUG 1 2013

ALC097-MSC039-012300-
/O.CON.KMOB.SV.W.0113.000000T0000Z-130801T2300Z/
GEORGE MS-MOBILE AL-
524 PM CDT THU AUG 1 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHWESTERN MOBILE AND EASTERN GEORGE COUNTIES...

AT 522 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DAMAGING WINDS OVER 60 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 8
MILES EAST OF LUCEDALE TO 5 MILES SOUTHWEST OF REGIONAL AIRPORT IN
WEST MOBILE TO 2 MILES WEST OF THEODORE...MOVING SOUTHWEST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  GRAND BAY...

THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 1 AND 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3103 8842 3075 8829 3062 8821 3054 8821
      3039 8840 3073 8842 3074 8866 3100 8844
      3100 8842 3102 8842
TIME...MOT...LOC 2224Z 031DEG 14KT 3087 8847 3061 8830
          3054 8821

$$
377 
WWUS54 KMOB 012238
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
538 PM CDT THU AUG 1 2013

ALC097-MSC039-012249-
/O.CAN.KMOB.SV.W.0113.000000T0000Z-130801T2300Z/
GEORGE MS-MOBILE AL-
538 PM CDT THU AUG 1 2013

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
SOUTHWESTERN MOBILE AND EASTERN GEORGE COUNTIES...

AT 536 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTHWESTERN
MOBILE AND EASTERN GEORGE COUNTIES HAS WEAKENED TO BELOW SEVERE
LIMITS...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

LAT...LON 3103 8842 3075 8829 3062 8821 3054 8821
      3039 8840 3073 8842 3074 8866 3100 8844
      3100 8842 3102 8842
TIME...MOT...LOC 2239Z 031DEG 14KT 3082 8851 3056 8833
          3049 8824

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 6:14 AM CDTAreal Flood AdvisoryMOBButler2 hr
Aug 1, 9:40 AM CDTMarine Weather StatementMOB3 hr
Aug 1, 10:53 AM CDTSpecial Marine WarningMOB97 min
Aug 1, 11:26 AM CDTSpecial Marine WarningMOB94 min
Aug 1, 2:59 PM CDTSpecial Marine WarningMOB91 min
Aug 1, 4:28 PM CDTSpecial Marine WarningMOB92 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2013Severe Thunderstorm Warnings in Mississippi, 2013Every severe thunderstorm warning in 2013

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.