Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 148, NWS Mobile, AL

July 30, 2012Mobile County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 30, 2012, 2:27 PM CDT for Mobile County, Washington County, Alabama. It was in force for 17 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 30, 2012, 2:27 PM CDT (19:27 UTC)
Expired: Jul 30, 2012, 2:44 PM CDT
In force: 17 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Mobile County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 58 km from the middle of the area, began a volume at 19:27 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 179 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: 3604 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 631 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -4.2

Open this sounding in Storm Lab

The text

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

308 
WUUS54 KMOB 301927
SVRMOB
ALC097-129-302030-
/O.NEW.KMOB.SV.W.0148.120730T1927Z-120730T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
227 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MOBILE COUNTY IN SOUTHWEST ALABAMA...
  SOUTHERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 330 PM CDT

* AT 216 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 9 MILES NORTH OF CITRONELLE...OR 8
  MILES NORTHWEST OF MOWA CHOCTAW RESERVATION...AND MOVING SOUTH     
  AT 10 TO 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOWA CHOCTAW RESERVATION...                 MOVICO...
  MOUNT VERNON...       GULFCREST...          CITRONELLE...
  CALVERT...            BUCKS...              MCINTOSH...
  MALCOLM...

LAT...LON 3134 8834 3136 8798 3099 8798 3099 8833
TIME...MOT...LOC 1926Z 339DEG 15KT 3117 8815

$$

1 follow-up statement

955 
WWUS54 KMOB 301944
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
244 PM CDT MON JUL 30 2012

ALC097-129-301954-
/O.CAN.KMOB.SV.W.0148.000000T0000Z-120730T2030Z/
WASHINGTON AL-MOBILE AL-
244 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR NORTHERN
MOBILE AND SOUTHERN WASHINGTON COUNTIES...

AT 241 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHERN 
MOBILE AND SOUTHERN WASHINGTON COUNTIES HAS WEAKENED BELOW SEVERE 
LIMITS.

LAT...LON 3134 8834 3136 8798 3099 8798 3099 8833
TIME...MOT...LOC 1944Z 339DEG 15KT 3110 8812

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:28 AM CDT	Heat Advisory	MOB		5 hr
Jul 30, 12:52 PM CDT	Special Marine Warning	MOB		68 min
Jul 30, 1:25 PM CDT	Special Marine Warning	MOB		65 min
Jul 30, 2:02 PM CDT	Special Marine Warning	MOB		88 min
Jul 30, 2:28 PM CDT	Special Marine Warning	MOB		92 min
Jul 30, 2:34 PM CDT	Special Marine Warning	MOB		86 min
Jul 30, 2:49 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	56 min
Jul 30, 3:03 PM CDT	Special Marine Warning	MOB		87 min
Jul 30, 3:04 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	56 min
Jul 30, 3:30 PM CDT	Special Marine Warning	MOB		90 min
Jul 30, 3:38 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	67 min
Jul 30, 4:03 PM CDT	Special Marine Warning	MOB		87 min
Jul 30, 4:14 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	61 min
Jul 30, 4:53 PM CDT	Special Marine Warning	MOB		97 min
Jul 30, 5:11 PM CDT	Severe Thunderstorm Warning	MOB	Covington	64 min
Jul 30, 5:21 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	54 min
Jul 30, 6:34 PM CDT	Severe Thunderstorm Warning	MOB	Covington	47 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 Every 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.