Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Mobile, AL

April 25, 2015Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 25, 2015, 4:35 AM CDT for Mobile County, Alabama. It was in force for 40 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 25, 2015, 4:35 AM CDT (09:35 UTC)
Expired: Apr 25, 2015, 5:15 AM CDT
In force: 40 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Mobile County, AL

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.6 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 864 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 463 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 650 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

623 
WUUS54 KMOB 250935
SVRMOB
ALC097-251015-
/O.NEW.KMOB.SV.W.0021.150425T0935Z-150425T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
435 AM CDT SAT APR 25 2015

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MOBILE COUNTY IN SOUTHWESTERN ALABAMA...

* UNTIL 515 AM CDT

* AT 434 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 9 MILES SOUTHWEST OF GULFCREST...OR
  13 MILES EAST OF LUCEDALE...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOBILE...              SARALAND...            SATSUMA...
  CREOLA...              MOUNT VERNON...        CHUNCHULA...
  GULFCREST...           AXIS...                BUCKS...
  I65 AND US 43...       MOVICO...              RUSSELL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS OFTEN PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING. PLEASE TAKE COVER UNTIL THE STORM PASSES.

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3079 8841 3101 8842 3115 8794 3108 8797
      3107 8795 3109 8792 3107 8794 3109 8791
      3103 8796 3104 8790 3103 8790 3095 8787
      3092 8791 3093 8795 3089 8798 3082 8795
TIME...MOT...LOC 0934Z 257DEG 41KT 3092 8836 
$$

2 follow-up statements

735 
WWUS54 KMOB 251000
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
500 AM CDT SAT APR 25 2015

ALC097-251015-
/O.CON.KMOB.SV.W.0021.000000T0000Z-150425T1015Z/
MOBILE AL-
500 AM CDT SAT APR 25 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR NORTHEASTERN MOBILE COUNTY...
    
AT 500 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
WINDS OVER 60 MPH WAS LOCATED OVER BUCKS...OR NEAR CREOLA...MOVING
EAST AT 45 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS OFTEN PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING. PLEASE TAKE COVER UNTIL THE STORM PASSES.

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&


LAT...LON 3081 8816 3108 8819 3115 8794 3108 8797
      3107 8795 3109 8792 3107 8794 3109 8791
      3103 8796 3104 8790 3103 8790 3095 8787
      3092 8791 3093 8795 3089 8798 3082 8795
TIME...MOT...LOC 1000Z 257DEG 41KT 3099 8802 
$$

677 
WWUS54 KMOB 251014
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
514 AM CDT SAT APR 25 2015

ALC097-251024-
/O.EXP.KMOB.SV.W.0021.000000T0000Z-150425T1015Z/
MOBILE AL-
514 AM CDT SAT APR 25 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MOBILE COUNTY
WILL BE ALLOWED TO EXPIRE...

AT 514 AM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHEASTERN
MOBILE COUNTY HAS MOVED OUT OF THE WARNED AREA...THUS THE SEVERE
THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 515 AM CDT.

LAT...LON 3081 8816 3108 8819 3115 8794 3108 8797
      3107 8795 3109 8792 3107 8794 3109 8791
      3103 8796 3104 8790 3103 8790 3095 8787
      3092 8791 3093 8795 3089 8798 3082 8795
TIME...MOT...LOC 1012Z 257DEG 41KT 3099 8802 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 4:23 AM CDT	Special Weather Statement	MOB	Choctaw	37 min
Apr 25, 4:27 AM CDT	Special Weather Statement	MOB	Mobile	33 min
Apr 25, 4:59 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	32 min
Apr 25, 5:17 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia	43 min
Apr 25, 5:41 AM CDT	Tornado Warning	MOB	Escambia	34 min
Apr 25, 5:54 AM CDT	Tornado Warning	MOB	Covington, Escambia	36 min
Apr 25, 6:14 AM CDT	Special Weather Statement	MOB	Butler, Crenshaw	61 min
Apr 25, 6:21 AM CDT	Severe Thunderstorm Warning	MOB	Covington, Escambia	39 min
Apr 25, 7:09 AM CDT	Special Marine Warning	MOB		36 min
Apr 25, 7:15 AM CDT	Special Weather Statement	MOB	Butler, Conecuh, Crenshaw	60 min
Apr 25, 1:28 PM CDT	Severe Thunderstorm Warning	MOB	Washington	62 min
Apr 25, 2:21 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	24 min
Apr 25, 2:30 PM CDT	Special Weather Statement	MOB	Monroe	60 min
Apr 25, 2:47 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	43 min
Apr 25, 2:48 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia, Monroe	27 min
Apr 25, 3:09 PM CDT	Special Marine Warning	MOB		51 min
Apr 25, 3:26 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	64 min
Apr 25, 3:37 PM CDT	Special Weather Statement	MOB	Conecuh, Covington, Escambia	53 min
Apr 25, 3:48 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	57 min
Apr 25, 4:06 PM CDT	Special Marine Warning	MOB		84 min
Apr 25, 4:18 PM CDT	Special Marine Warning	MOB		87 min
Apr 25, 4:43 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Covington, Crenshaw	24 min
Apr 25, 5:36 PM CDT	Special Marine Warning	MOB		39 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015 Every severe thunderstorm warning in 2015

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.