Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 61, NWS Mobile, AL

May 26, 2011Choctaw County, Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 26, 2011, 12:14 PM CDT for Choctaw County, Clarke County, Alabama. It was in force for 33 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 26, 2011, 12:14 PM CDT (17:14 UTC)
Expired: May 26, 2011, 12:47 PM CDT
In force: 33 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL

The radar

The Mobile radar (KMOB), 153 km from the middle of the area, began a volume at 17:14 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, 5.2 hours before the alert went out and 175 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: 2103 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 485 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

805 
WUUS54 KMOB 261714
SVRMOB
ALC023-025-261800-
/O.NEW.KMOB.SV.W.0061.110526T1714Z-110526T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1214 PM CDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 100 PM CDT

* AT 1209 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  SOUTH OF BUTLER...OR NEAR WIMBLY...AND MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MT
  STERLING AND HOLTAMVILLE

&&

LAT...LON 3214 8804 3209 8804 3207 8806 3207 8809
      3206 8811 3201 8810 3202 8808 3200 8807
      3200 8775 3185 8828 3202 8836 3216 8802
TIME...MOT...LOC 1714Z 248DEG 22KT 3197 8822

$$
!

2 follow-up statements

384 
WWUS54 KMOB 261734
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1234 PM CDT THU MAY 26 2011

ALC023-025-261800-
/O.CON.KMOB.SV.W.0061.000000T0000Z-110526T1800Z/
CLARKE AL-CHOCTAW AL-
1234 PM CDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR CENTRAL CHOCTAW AND NORTHWESTERN CLARKE COUNTIES...

AT 1232 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR SLATER...OR 7 MILES SOUTHEAST OF BUTLER...MOVING
NORTHEAST AT 25 MPH.

LAT...LON 3214 8804 3209 8804 3207 8806 3207 8809
      3206 8811 3201 8810 3202 8808 3200 8807
      3200 8775 3185 8828 3202 8836 3216 8802
TIME...MOT...LOC 1734Z 243DEG 20KT 3203 8812

$$

287 
WWUS54 KMOB 261747
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1247 PM CDT THU MAY 26 2011

ALC023-025-261757-
/O.CAN.KMOB.SV.W.0061.000000T0000Z-110526T1800Z/
CLARKE AL-CHOCTAW AL-
1247 PM CDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHOCTAW AND
NORTHWESTERN CLARKE COUNTIES IS CANCELLED...

AT 1247 PM CDT...THE STORM THAT PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA...THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED.

LAT...LON 3214 8804 3209 8804 3207 8806 3207 8809
      3206 8811 3201 8810 3202 8808 3200 8807
      3200 8775 3185 8828 3202 8836 3216 8802
TIME...MOT...LOC 1747Z 243DEG 20KT 3206 8804

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 10:25 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	50 min
May 26, 12:22 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	27 min
May 26, 12:43 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Washington	47 min
May 26, 12:45 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	45 min
May 26, 1:04 PM CDT	Severe Thunderstorm Warning	MOB	Butler	41 min
May 26, 1:24 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Mobile, Washington	37 min
May 26, 1:27 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	63 min
May 26, 1:29 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	46 min
May 26, 1:34 PM CDT	Severe Thunderstorm Warning	MOB	Covington, Crenshaw	26 min
May 26, 2:43 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	62 min
May 26, 2:44 PM CDT	Flash Flood Warning	MOB	Choctaw, Washington	3 hr
May 26, 3:20 PM CDT	Tornado Warning	MOB	Mobile	40 min
May 26, 3:31 PM CDT	Special Marine Warning	MOB		59 min
May 26, 3:39 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Mobile, Monroe, Washington	20 min
May 26, 4:23 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	37 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every severe thunderstorm warning in 2011

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.