Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 87, NWS Mobile, AL
NWS Mobile, AL issued this tornado warning at Apr 27, 2011, 8:00 PM CDT for Choctaw County, Alabama. It was in force for 60 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, 8:00 PM CDT (01:00 UTC)
- Expired
- Apr 27, 2011, 9:00 PM CDT
- In force
- 60 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
County Choctaw County, AL
The radar
The Mobile radar (KMOB), 165 km from the middle of the area, began a volume at 01:01 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 |
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 1.0 hours before the alert went out and 167 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.
834
WFUS54 KMOB 280100
TORMOB
ALC023-280200-
/O.NEW.KMOB.TO.W.0087.110428T0100Z-110428T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
800 PM CDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
* TORNADO WARNING FOR...
NORTHERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
THIS INCLUDES THE CITY OF BUTLER...
* UNTIL 900 PM CDT
* AT 753 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
QUITMAN...OR 8 MILES SOUTHEAST OF STONEWALL...MOVING EAST AT 40
MPH. THIS IS A SECOND TORNADO WARNING.
* THE DEVELOPING TORNADO WILL BE NEAR...
NEEDHAM AROUND 825 PM CDT...
LISMAN AROUND 835 PM CDT...
BUTLER AROUND 840 PM CDT...
MT STERLING AND MOUNT STERLING AROUND 845 PM CDT...
PENNINGTON AND DEAS AROUND 855 PM CDT...
RADAR TRENDS INDICATE A RECENT INTENSIFICATION OF THIS
THUNDERSTORM. IT IS DEVELOPING IN AN ENVIRONMENT CAPABLE
OF PRODUCING A TORNADO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.
&&
LAT...LON 3230 8796 3230 8799 3228 8801 3216 8800
3214 8804 3209 8804 3207 8806 3206 8811
3201 8811 3202 8808 3200 8807 3196 8847
3231 8843 3232 8796
TIME...MOT...LOC 0056Z 258DEG 33KT 3205 8869
$$3 follow-up statements
654
WWUS54 KMOB 280134
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
834 PM CDT WED APR 27 2011
ALC023-280200-
/O.CON.KMOB.TO.W.0087.000000T0000Z-110428T0200Z/
CHOCTAW AL-
834 PM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHERN
CHOCTAW COUNTY...
AT 824 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT ON RADAR A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.
THIS THUNDERSTORM WAS NEAR HINTON...OR ABOUT 13 MILES WEST OF
BUTLER...MOVING EAST AT 35 MPH.
THE TORNADO WILL BE NEAR...
LISMAN AROUND 840 PM CDT...
GREEN ACRES AND BUTLER AROUND 845 PM CDT...
LITTLE WALKER...MT STERLING...MOUNT STERLING AND JACHIN AROUND 850
PM CDT...
CHOCTAW CITY...ROBJOHN AND DEAS AROUND 855 PM CDT...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.
LAT...LON 3230 8796 3230 8799 3228 8801 3216 8800
3214 8804 3209 8804 3207 8806 3206 8811
3201 8811 3202 8808 3200 8807 3196 8847
3231 8843 3232 8796
TIME...MOT...LOC 0133Z 263DEG 32KT 3214 8834
$$697
WWUS54 KMOB 280144
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
844 PM CDT WED APR 27 2011
ALC023-280200-
/O.CON.KMOB.TO.W.0087.000000T0000Z-110428T0200Z/
CHOCTAW AL-
844 PM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHERN
CHOCTAW COUNTY...
AT 838 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS NEAR LISMAN...OR ABOUT 7 MILES NORTHWEST OF
BUTLER...MOVING EAST AT 35 TO 40 MPH.
THE TORNADO WILL BE NEAR...
JACHIN AND ROBJOHN AROUND 850 PM CDT...
INDIAN SPRINGS...DEAS...EDNA AND CHOCTAW CITY AROUND 855 PM CDT...
NAHEOLA AND OAKCHIA AROUND 900 PM CDT...
THIS PATH IS SEPARATE FROM AND WILL BE SOUTH OF THE PREVIOUS
TORNADO TRACK FROM THE EARLIER TORNADO PRODUCING THUNDERSTORM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.
LAT...LON 3230 8796 3230 8799 3228 8801 3216 8800
3214 8804 3209 8804 3207 8806 3206 8811
3201 8811 3202 8808 3200 8807 3196 8847
3231 8843 3232 8796
TIME...MOT...LOC 0142Z 249DEG 37KT 3219 8825
$$625
WWUS54 KMOB 280155
SVSMOB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
855 PM CDT WED APR 27 2011
ALC023-280200-
/O.CON.KMOB.TO.W.0087.000000T0000Z-110428T0200Z/
CHOCTAW AL-
855 PM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHERN
CHOCTAW COUNTY...
AT 852 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT ON RADAR A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.
THIS THUNDERSTORM WAS NEAR CHOCTAW CITY...OR ABOUT 12 MILES
NORTHEAST OF BUTLER...MOVING EAST AT 40 MPH.
THE TORNADO WILL BE NEAR...
OAKCHIA AROUND 900 PM CDT...
THE THUNDERSTORM...AND THE PARTICULAR ASSOCIATED
CIRCULATION...SHOULD EXIT NORTHEAST CHOCTAW COUNTY BY 900 PM CDT.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN ALABAMA AND SOUTHEAST MISSISSIPPI.
LAT...LON 3206 8811 3198 8846 3218 8839 3231 8821
3232 8796 3230 8796 3230 8799 3228 8801
3216 8800 3214 8804 3209 8804 3207 8806
TIME...MOT...LOC 0154Z 256DEG 48KT 3222 8805
$$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, 9:42 PM CDT | Severe Thunderstorm Warning | MOB | Wilcox | 33 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
Tornado Warnings in Alabama, 2011Every tornado warning in 2011Tornadoes 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.