Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 55, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 27, 2011, 9:42 PM CDT for Wilcox 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
- Apr 27, 2011, 9:42 PM CDT (02:42 UTC)
- Expired
- Apr 27, 2011, 10:15 PM CDT
- In force
- 33 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Wilcox County, AL
The radar
The Birmingham radar (KBMX), 134 km from the middle of the area, began a volume at 02:44 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 27, 1:42 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 27, 9:42 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 2.7 hours before the alert went out and 135 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
- 3065 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 448 m²/s²
- 0-3 km storm-relative helicity
- 480 m²/s²
- Significant tornado parameter
- 9.6
- Supercell composite
- 33.6
The text
As transmitted, in the capitals the NWS used until 2016.
976
WUUS54 KMOB 280242
SVRMOB
ALC131-280345-
/O.NEW.KMOB.SV.W.0055.110428T0242Z-110428T0345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
942 PM CDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN WILCOX COUNTY IN SOUTH CENTRAL ALABAMA...
* UNTIL 1045 PM CDT
* AT 938 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 16 MILES EAST OF LINDEN TO 7
MILES SOUTHEAST OF LINDEN TO 13 MILES EAST OF BUTLER...AND MOVING
EAST AT 35 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
PINE HILL AROUND 1020 PM CDT...
ANNE MARIE AND ANNE MANIE AROUND 1025 PM CDT...
YELLOW BLUFF AROUND 1035 PM CDT...
BOYKIN AND CANTON BEND AROUND 1045 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
&&
LAT...LON 3221 8736 3220 8732 3208 8718 3205 8722
3187 8761 3189 8767 3201 8767 3202 8763
3214 8762 3215 8753 3227 8753 3228 8751
3228 8743
TIME...MOT...LOC 0242Z 276DEG 29KT 3231 8749 3220 8770
3212 8796
$$1 follow-up statement
917
WWUS54 KMOB 280315
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1015 PM CDT WED APR 27 2011
ALC131-280324-
/O.CAN.KMOB.SV.W.0055.000000T0000Z-110428T0345Z/
WILCOX AL-
1015 PM CDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WILCOX COUNTY IS
CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT THURSDAY MORNING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.
LAT...LON 3221 8736 3220 8732 3208 8718 3205 8722
3187 8761 3189 8767 3201 8767 3202 8763
3214 8762 3215 8753 3227 8753 3228 8751
3228 8743
TIME...MOT...LOC 0314Z 276DEG 29KT 3228 8719 3217 8740
3209 8766
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:21 PM CDT | Tornado Warning | MOB | Choctaw | 39 min |
| Apr 27, 8:00 PM CDT | Tornado Warning | MOB | Choctaw | 60 min |
| Apr 28, 1:02 AM CDT | Tornado Warning | MOB | Covington | 13 min |
| Apr 28, 3:27 AM CDT | Special Marine Warning | MOB | 48 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.