Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 9, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Feb 28, 2011, 4:33 PM CST for Wilcox County, Alabama. It was in force for 22 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
- Feb 28, 2011, 4:33 PM CST (22:33 UTC)
- Expired
- Feb 28, 2011, 4:55 PM CST
- In force
- 22 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Wilcox County, AL
The radar
The Birmingham radar (KBMX), 121 km from the middle of the area, began a volume at 22:35 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 121 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.
- Mixed-layer CAPE
- 652 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 498 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 425 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 5.9
The text
As transmitted, in the capitals the NWS used until 2016.
791
WUUS54 KMOB 282233
SVRMOB
ALC131-282315-
/O.NEW.KMOB.SV.W.0009.110228T2233Z-110228T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
433 PM CST MON FEB 28 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
* UNTIL 515 PM CST
* AT 426 PM CST...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 11
MILES EAST OF LINDEN...OR NEAR THOMASTON...AND MOVING EAST AT 55
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
REHOBOTH AROUND 440 PM CST...OR THE EXTREME NORTHERN TIP OF
WILCOX COUNTY.
&&
LAT...LON 3225 8741 3225 8739 3223 8737 3221 8736
3221 8732 3218 8730 3217 8740 3218 8753
3227 8753 3228 8751 3228 8743
TIME...MOT...LOC 2232Z 261DEG 48KT 3230 8751
$$2 follow-up statements
406
WWUS54 KMOB 282248
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
448 PM CST MON FEB 28 2011
ALC131-282315-
/O.CON.KMOB.SV.W.0009.000000T0000Z-110228T2315Z/
WILCOX AL-
448 PM CST MON FEB 28 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR NORTH CENTRAL WILCOX COUNTY...
AT 445 PM CST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS OVER 60 MPH. THIS STORM WAS NEAR REHOBOTH...OR ABOUT
17 MILES NORTH OF CAMDEN...MOVING EAST AT 55 MPH.
THIS STORM WILL EXIT THE EXTREME NORTHERN PORTION OF WILCOX COUNTY
BY 5 PM CST. THE WARNING WILL BE CANCELED AT THIS TIME.
LAT...LON 3228 8743 3225 8741 3225 8739 3223 8737
3221 8736 3221 8732 3218 8730 3217 8740
3218 8753
TIME...MOT...LOC 2247Z 265DEG 50KT 3225 8730
$$954
WWUS54 KMOB 282255
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
455 PM CST MON FEB 28 2011
ALC131-282305-
/O.CAN.KMOB.SV.W.0009.000000T0000Z-110228T2315Z/
WILCOX AL-
455 PM CST MON FEB 28 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WILCOX COUNTY IS
CANCELLED...
LAT...LON 3228 8743 3225 8741 3225 8739 3223 8737
3221 8736 3221 8732 3218 8730 3217 8740
3218 8753
TIME...MOT...LOC 2255Z 265DEG 50KT 3226 8717
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 4:00 AM CST | Wind Advisory | MOB | Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw and 4 more | 11 hr |
| Feb 28, 7:28 AM CST | Marine Dense Fog Advisory | MOB | 4 hr | |
| Feb 28, 5:07 PM CST | Severe Thunderstorm Warning | MOB | Clarke, Monroe, Wilcox | 53 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2011Every 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.