Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 64, NWS Mobile, AL

May 21, 2012Baldwin County, Escambia County, Mobile County, Alabama; Escambia County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at May 21, 2012, 5:48 PM CDT for Baldwin County, Escambia County, Mobile County, Alabama; Escambia County, Florida. 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
May 21, 2012, 5:48 PM CDT (22:48 UTC)
Expired
May 21, 2012, 6:45 PM CDT
In force
57 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Escambia County, AL, Mobile County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 29 km from the middle of the area, began a volume at 22:51 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, 10.8 hours before the alert went out and 177 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 2012-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 620 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 2012-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
620 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
39 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.

325 
WUUS54 KMOB 212248
SVRMOB
ALC003-053-097-FLC033-212345-
/O.NEW.KMOB.SV.W.0064.120521T2248Z-120521T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
548 PM CDT MON MAY 21 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  SOUTHWESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...
  CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...
  CENTRAL MOBILE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 645 PM CDT

* AT 545 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 5 MILES EAST OF CITRONELLE TO 4 MILES NORTH
  OF CREOLA TO 9 MILES NORTHWEST OF BAY MINETTE...AND MOVING
  SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOVICO...             SATSUMA...            SARALAND...
  PRICHARD...           MOUNT VERNON...       I65 AND US 45...
  I65 AND US 43...      I65 AND I165...       I65 AND AL 158...

THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 21 AND
51. THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 4 AND 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PERSONS IN THE WARNED AREA SHOULD PREPARE FOR LARGE HAIL AND 
DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING 
BUT AWAY FROM WINDOWS.

&&

LAT...LON 3111 8830 3101 8750 3067 8732 3060 8792
      3066 8795 3067 8801 3063 8805 3059 8806
      3058 8809
TIME...MOT...LOC 2246Z 324DEG 19KT 3102 8817 3093 8800
          3087 8782

$$
1 follow-up statement
310 
WWUS54 KMOB 212319
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
619 PM CDT MON MAY 21 2012

ALC053-212324-
/O.CAN.KMOB.SV.W.0064.000000T0000Z-120521T2345Z/
ESCAMBIA AL-
619 PM CDT MON MAY 21 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
SOUTHWESTERN ESCAMBIA COUNTY...

AT 619 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR SOUTHWESTERN 
ESCAMBIA COUNTY HAD MOVED OUT OF THE COUNTY...THUS THE SEVERE 
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3058 8809 3101 8826 3101 8762 3099 8760
      3100 8749 3067 8732 3060 8792 3066 8795
      3067 8801 3064 8805 3059 8806
TIME...MOT...LOC 2314Z 327DEG 20KT 3081 8794

$$

ALC003-097-FLC033-212345-
/O.CON.KMOB.SV.W.0064.000000T0000Z-120521T2345Z/
ESCAMBIA FL-BALDWIN AL-MOBILE AL-
619 PM CDT MON MAY 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR EAST CENTRAL MOBILE...CENTRAL BALDWIN AND NORTHWESTERN ESCAMBIA
COUNTIES...

AT 619 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 5 MILES 
SOUTHEAST OF CREOLA...OR 6 MILES EAST OF SARALAND...MOVING SOUTHEAST 
AT 25 MPH.

LOCATIONS IMPACTED BY THIS STORM INCLUDE...ALABAMA STATE HIGHWAY 225.


LAT...LON 3058 8809 3101 8826 3101 8762 3099 8760
      3100 8749 3067 8732 3060 8792 3066 8795
      3067 8801 3064 8805 3059 8806
TIME...MOT...LOC 2314Z 327DEG 20KT 3081 8794

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 2:03 PM CDTSpecial Marine WarningMOB87 min
May 21, 2:54 PM CDTSevere Thunderstorm WarningMOBMonroe, Wilcox51 min
May 21, 3:04 PM CDTSevere Thunderstorm WarningMOBMobile19 min
May 21, 3:08 PM CDTSevere Thunderstorm WarningMOBButler, Conecuh, Monroe52 min
May 21, 3:11 PM CDTSpecial Marine WarningMOB59 min
May 21, 3:36 PM CDTSevere Thunderstorm WarningMOBButler, Clarke, Conecuh, Covington, Crenshaw, Monroe and 1 more54 min
May 21, 4:26 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia64 min
May 21, 4:32 PM CDTSpecial Marine WarningMOB88 min
May 21, 4:54 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia, Mobile51 min
May 21, 6:56 PM CDTSevere Thunderstorm WarningMOBBaldwin64 min
May 21, 5:22 PM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa53 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012

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.