Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 80, NWS Mobile, AL

May 30, 2012Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 30, 2012, 5:38 PM CDT for Clarke County, Alabama. It was in force for 67 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 30, 2012, 5:38 PM CDT (22:38 UTC)
Expired: May 30, 2012, 6:45 PM CDT
In force: 67 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Clarke County, AL

The radar

The Mobile radar (KMOB), 145 km from the middle of the area, began a volume at 22:41 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

Birmingham, AL (KBMX), launched 12:00Z, 10.6 hours before the alert went out and 170 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: 93 J/kg
Mixed-layer CIN: -271 J/kg
Mixed-layer LCL: 1289 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: -6 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.

079 
WUUS54 KMOB 302238
SVRMOB
ALC025-302345-
/O.NEW.KMOB.SV.W.0080.120530T2238Z-120530T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
538 PM CDT WED MAY 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 645 PM CDT

* AT 536 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 10 MILES WEST
  OF THOMASVILLE...OR 9 MILES SOUTH OF HOLTAMVILLE...AND MOVING NORTH
  AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTH CENTRAL CLARKE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8779 3199 8774 3177 8781 3179 8802
      3199 8801 3199 8780 3200 8779
TIME...MOT...LOC 2238Z 189DEG 8KT 3187 8790

$$

3 follow-up statements

248 
WWUS54 KMOB 302255
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
555 PM CDT WED MAY 30 2012

ALC025-302345-
/O.CON.KMOB.SV.W.0080.000000T0000Z-120530T2345Z/
CLARKE AL-
555 PM CDT WED MAY 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTH CENTRAL CLARKE COUNTY...

AT 550 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 12 MILES WEST OF
THOMASVILLE...OR 6 MILES SOUTH OF HOLTAMVILLE...MOVING NORTH AT 10
MPH.

LOCATIONS IMPACTED INCLUDE...
  RURAL NORTH CENTRAL CLARKE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8779 3199 8774 3177 8781 3179 8802
      3199 8801 3199 8780 3200 8779
TIME...MOT...LOC 2255Z 169DEG 8KT 3191 8794

$$

646 
WWUS54 KMOB 302311
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
611 PM CDT WED MAY 30 2012

ALC025-302345-
/O.CON.KMOB.SV.W.0080.000000T0000Z-120530T2345Z/
CLARKE AL-
611 PM CDT WED MAY 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTH CENTRAL CLARKE COUNTY...

AT 608 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 13 MILES WEST OF
THOMASVILLE...OR 2 MILES SOUTH OF HOLTAMVILLE...AND WAS NEARLY 
STATIONARY.

LOCATIONS IMPACTED INCLUDE...
  RURAL NORTH CENTRAL CLARKE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8779 3199 8774 3177 8781 3179 8802
      3199 8801 3199 8780 3200 8779
TIME...MOT...LOC 2311Z 048DEG 2KT 3196 8795

$$

099 
WWUS54 KMOB 302342
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
642 PM CDT WED MAY 30 2012

ALC025-302353-
/O.EXP.KMOB.SV.W.0080.000000T0000Z-120530T2345Z/
CLARKE AL-
642 PM CDT WED MAY 30 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE FOR
NORTH CENTRAL CLARKE COUNTY...

AT 637 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTH CENTRAL
CLARKE COUNTY HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE SEVERE
THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 645 PM CDT.

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

LAT...LON 3199 8779 3199 8774 3177 8781 3179 8802
      3199 8801 3199 8780 3200 8779
TIME...MOT...LOC 2343Z 048DEG 2KT 3195 8797

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 9:32 PM CDT	Special Marine Warning	MOB		88 min
May 30, 2:23 AM CDT	Severe Thunderstorm Warning	MOB	Covington	37 min
May 30, 2:12 PM CDT	Special Marine Warning	MOB		93 min
May 30, 2:54 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	66 min
May 30, 3:00 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	60 min
May 30, 3:19 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile	56 min
May 30, 4:03 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	57 min
May 30, 4:12 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	37 min
May 30, 4:16 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	59 min
May 30, 4:21 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	54 min
May 30, 5:06 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Monroe	54 min
May 30, 5:14 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	24 min
May 30, 5:52 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	29 min
May 30, 6:20 PM CDT	Severe Thunderstorm Warning	MOB	Covington, Escambia	32 min
May 30, 6:47 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	46 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.