Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 128, NWS Birmingham, AL
NWS Birmingham, AL issued this tornado warning at Apr 27, 2011, 7:54 PM CDT for St. Clair County, Shelby County, Talladega County, Alabama. It was in force for 51 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 27, 2011, 7:54 PM CDT (00:54 UTC)
- Expired
- Apr 27, 2011, 8:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Shelby County, AL, St. Clair County, AL, Talladega County, AL
The radar
The Birmingham radar (KBMX), 32 km from the middle of the area, began a volume at 00:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 8:08 PM CDT | TORNADO | N Wilsonville, AL | SPOTTER REPORTED TORNADO STRUCK POWERLINES AND/OR TRANSFORMER. POWER IS OUT. |
| Apr 27, 8:17 PM CDT | TORNADO 1 | 2 Ese Vincent, AL | AN EF-1 TORNADO TOUCHED DOWN ABOUT 2 MILES ESE OF VINCENT IN EASTERN SHELBY COUNTY AND MOVED NORTHEAST INTO WESTERN TALLADEGA COUNTY SNAPPING OFF AND/OR UPROOTING DOZENS OF HARD AND SOFT WOOD TREES ALONG THE PATH. THE ONLY HOME DAMAGE FOUND ALONG THE PATH WAS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 0.9 hours before the alert went out and 33 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.
520 WFUS54 KBMX 280054 TORBMX ALC115-117-121-280145- /O.NEW.KBMX.TO.W.0128.110428T0054Z-110428T0145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL ISSUED BY NATIONAL WEATHER SERVICE PEACHTREE CITY GA 754 PM CDT WED APR 27 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * TORNADO WARNING FOR... SHELBY COUNTY IN CENTRAL ALABAMA SOUTH CENTRAL ST. CLAIR COUNTY IN CENTRAL ALABAMA WEST CENTRAL TALLADEGA COUNTY IN EAST CENTRAL ALABAMA * UNTIL 845 PM CDT * AT 750 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ALABASTER...MOVING NORTHEAST AT 45 MPH. THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING TORNADOES. TAKE COVER NOW! * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO COLUMBIANA...CHELSEA...WILSONVILLE...HARPERSVILLE...CHILDERSBURG AND VINCENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. THIS STORM IS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES. IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY! TAKE COVER NOW! TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE. IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. && LAT...LON 3325 8612 3308 8680 3327 8689 3357 8632 TIME...MOT...LOC 0054Z 244DEG 39KT 3321 8673 $$
3 follow-up statements
177 WWUS54 KBMX 280100 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 800 PM CDT WED APR 27 2011 ALC115-117-121-280145- /O.CON.KBMX.TO.W.0128.000000T0000Z-110428T0145Z/ SHELBY AL-TALLADEGA AL-ST. CLAIR AL- 800 PM CDT WED APR 27 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL ST. CLAIR... CENTRAL TALLADEGA AND EASTERN SHELBY COUNTIES UNTIL 845 PM CDT... AT 754 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED JUST NORTHEAST SHELBY COUNTY AIRPORT...OR 6 MILES SOUTHEAST OF ALABASTER...MOVING NORTHEAST AT 45 MPH. LOCATIONS IMPACTED INCLUDE... COLUMBIANA...CHELSEA...WILSONVILLE...CHILDERSBURG...HIGHLAND LAKES...WESTOVER...HARPERSVILLE...VINCENT...LOGAN MARTIN DAM AND COOSA ISLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN IN A LOW LYING AREA. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3315 8672 3331 8681 3357 8632 3325 8612 TIME...MOT...LOC 0100Z 244DEG 39KT 3324 8666 $$ 61
420 WWUS54 KBMX 280108 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 808 PM CDT WED APR 27 2011 ALC115-117-121-280145- /O.CON.KBMX.TO.W.0128.000000T0000Z-110428T0145Z/ SHELBY AL-TALLADEGA AL-ST. CLAIR AL- 808 PM CDT WED APR 27 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL ST. CLAIR... CENTRAL TALLADEGA AND NORTHEASTERN SHELBY COUNTIES UNTIL 845 PM CDT... AT 803 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR WESTOVER...OR 5 MILES EAST OF CHELSEA...MOVING NORTHEAST AT 55 MPH. LOCATIONS IMPACTED INCLUDE... CHILDERSBURG...HARPERSVILLE...VINCENT...LOGAN MARTIN DAM... SYCAMORE...COOSA ISLAND...ALPINE BAY RESORT...ALPINE...WINTERBORO AND STERRETT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3320 8658 3337 8668 3357 8632 3325 8612 TIME...MOT...LOC 0108Z 240DEG 46KT 3333 8648 $$ 03
538
WWUS54 KBMX 280124
SVSBMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
824 PM CDT WED APR 27 2011
ALC117-280134-
/O.CAN.KBMX.TO.W.0128.000000T0000Z-110428T0145Z/
SHELBY AL-
824 PM CDT WED APR 27 2011
...THE TORNADO WARNING FOR NORTHEASTERN SHELBY COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.
LAT...LON 3357 8632 3325 8612 3329 8630 3347 8639
3350 8638
TIME...MOT...LOC 0124Z 236DEG 40KT 3343 8631
$$
ALC115-121-280145-
/O.CON.KBMX.TO.W.0128.000000T0000Z-110428T0145Z/
TALLADEGA AL-ST. CLAIR AL-
824 PM CDT WED APR 27 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL ST. CLAIR
AND CENTRAL TALLADEGA COUNTIES UNTIL 845 PM CDT...
AT 822 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR LOGAN MARTIN DAM...OR 10 MILES NORTH OF
CHILDERSBURG...MOVING NORTHEAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
ALPINE BAY RESORT...WINTERBORO...ALPINE AND COUNTRY CLUB ESTATES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.
LAT...LON 3357 8632 3325 8612 3329 8630 3347 8639
3350 8638
TIME...MOT...LOC 0124Z 236DEG 40KT 3343 8631
$$
03The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:07 PM CDT | Tornado Warning | BMX | Bibb, Chilton, Shelby | 53 min |
| Apr 27, 7:17 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Marion, Walker, Winston | 43 min |
| Apr 27, 7:17 PM CDT | Tornado Warning | BMX | Calhoun, Cherokee, Etowah | 43 min |
| Apr 27, 7:28 PM CDT | Tornado Warning | BMX | Hale, Marengo, Sumter | 62 min |
| Apr 27, 7:31 PM CDT | Tornado Warning | BMX | Calhoun, Cleburne, Etowah, St. Clair, Shelby, Talladega | 59 min |
| Apr 27, 7:33 PM CDT | Tornado Warning | BMX | Autauga, Coosa, Elmore, Tallapoosa | 57 min |
| Apr 27, 8:02 PM CDT | Tornado Warning | BMX | Clay, Cleburne, Coosa, Randolph, Tallapoosa | 58 min |
| Apr 27, 8:03 PM CDT | Tornado Warning | BMX | Blount | 15 min |
| Apr 27, 8:11 PM CDT | Severe Thunderstorm Warning | BMX | Greene, Sumter | 64 min |
| Apr 27, 8:17 PM CDT | Tornado Warning | BMX | Dallas, Hale, Marengo, Perry | 58 min |
| Apr 27, 8:18 PM CDT | Tornado Warning | BMX | Calhoun, Cherokee, Cleburne | 42 min |
| Apr 27, 8:20 PM CDT | Tornado Warning | BMX | Chambers, Elmore, Lee, Tallapoosa | 55 min |
| Apr 27, 8:21 PM CDT | Tornado Warning | BMX | Calhoun, St. Clair, Talladega | 21 min |
| Apr 27, 9:00 PM CDT | Tornado Warning | BMX | Chambers | 60 min |
| Apr 27, 9:03 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 42 min |
| Apr 27, 9:03 PM CDT | Tornado Warning | BMX | Autauga, Chilton, Dallas, Perry | 57 min |
| Apr 27, 9:36 PM CDT | Severe Thunderstorm Warning | BMX | Dallas, Hale, Marengo, Perry | 54 min |
| Apr 27, 9:37 PM CDT | Tornado Warning | BMX | Chambers, Lee, Tallapoosa | 38 min |
| Apr 27, 9:46 PM CDT | Tornado Warning | BMX | Chilton, Coosa, Tallapoosa | 37 min |
| Apr 27, 9:51 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Cherokee, Etowah | 39 min |
| Apr 27, 9:55 PM CDT | Areal Flood Advisory | BMX | Dallas, Marengo, Perry | 3 hr |
| Apr 27, 10:18 PM CDT | Severe Thunderstorm Warning | BMX | Lee | 27 min |
| Apr 27, 10:31 PM CDT | Tornado Warning | BMX | Lee | 12 min |
| Apr 27, 10:39 PM CDT | Severe Thunderstorm Warning | BMX | Chambers, Clay, Coosa, Elmore, Randolph, Tallapoosa | 49 min |
| Apr 27, 11:15 PM CDT | Severe Thunderstorm Warning | BMX | Dallas, Lowndes | 45 min |
| Apr 27, 11:31 PM CDT | Severe Thunderstorm Warning | BMX | Autauga, Elmore, Lowndes, Montgomery | 44 min |
| Apr 28, 12:01 AM CDT | Severe Thunderstorm Warning | BMX | Autauga, Bullock, Elmore, Lee, Lowndes, Macon and 3 more | 49 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.