Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 157, NWS Birmingham, AL
NWS Birmingham, AL issued this tornado warning at Nov 16, 2011, 9:46 AM CST for Chilton County, Coosa County, Alabama. It was in force for 44 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
- Nov 16, 2011, 9:46 AM CST (15:46 UTC)
- Expired
- Nov 16, 2011, 10:30 AM CST
- In force
- 44 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Chilton County, AL, Coosa County, AL
The radar
The Birmingham radar (KBMX), 37 km from the middle of the area, began a volume at 15:47 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 |
|---|---|---|---|
| Nov 16, 2:20 AM CST | Tornado Watch | SPC | 8 hr |
| Nov 16, 9:46 AM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 3.8 hours before the alert went out and 38 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
- 990 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 497 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
774 WFUS54 KBMX 161546 TORBMX ALC021-037-161630- /O.NEW.KBMX.TO.W.0157.111116T1546Z-111116T1630Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 946 AM CST WED NOV 16 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * TORNADO WARNING FOR... EASTERN CHILTON COUNTY IN ALABAMA... WESTERN COOSA COUNTY IN EAST CENTRAL ALABAMA... * UNTIL 1030 AM CST * AT 946 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR POOLES CROSSROADS...OR NEAR CLANTON...AND MOVING NORTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... CLANTON...WEOGUFKA...ROCKFORD...GAP OF THE MOUNTAIN...LAY LAKE DAM...HIGGINS FERRY PARK...DOLLAR...MARBLE VALLEY...LYLE AND MORIAH. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. && TO REPORT SEVERE WEATHER... CALL 1-800-856-0758. LAT...LON 3310 8638 3288 8619 3276 8672 3286 8677 TIME...MOT...LOC 1546Z 244DEG 32KT 3283 8667 $$ 19
2 follow-up statements
249 WWUS54 KBMX 161558 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 958 AM CST WED NOV 16 2011 ALC021-037-161630- /O.CON.KBMX.TO.W.0157.000000T0000Z-111116T1630Z/ CHILTON AL-COOSA AL- 958 AM CST WED NOV 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN COOSA AND EAST CENTRAL CHILTON COUNTIES UNTIL 1030 AM CST... AT 958 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR GAP OF THE MOUNTAIN...OR NEAR CLANTON...MOVING NORTHEAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... WEOGUFKA...ROCKFORD...LAY LAKE DAM...HIGGINS FERRY PARK...DOLLAR... MARBLE VALLEY...LYLE...MORIAH...UNITY AND STRICKLAND CROSSROADS. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3282 8658 3295 8662 3310 8638 3288 8619 TIME...MOT...LOC 1558Z 243DEG 32KT 3288 8656 $$ 19
389 WWUS54 KBMX 161609 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 1009 AM CST WED NOV 16 2011 ALC021-037-161630- /O.CON.KBMX.TO.W.0157.000000T0000Z-111116T1630Z/ CHILTON AL-COOSA AL- 1009 AM CST WED NOV 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN COOSA AND EAST CENTRAL CHILTON COUNTIES UNTIL 1030 AM CST... AT 1010 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR LAY LAKE DAM...OR 11 MILES NORTHEAST OF CLANTON...MOVING NORTHEAST AT 40 MPH. LOCATIONS IMPACTED INCLUDE... WEOGUFKA...ROCKFORD...MARBLE VALLEY...LYLE...MORIAH...UNITY... STRICKLAND CROSSROADS AND BENTLEYVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3286 8652 3301 8653 3310 8638 3288 8619 TIME...MOT...LOC 1610Z 242DEG 36KT 3295 8642 $$ 19
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 16, 2:42 AM CST | Special Weather Statement | BMX | Pickens | 48 min |
| Nov 16, 2:59 AM CST | Special Weather Statement | BMX | Fayette | 46 min |
| Nov 16, 3:32 AM CST | Special Weather Statement | BMX | Walker | 43 min |
| Nov 16, 5:44 AM CST | Special Weather Statement | BMX | Sumter | 46 min |
| Nov 16, 6:34 AM CST | Tornado Warning | BMX | Marengo, Sumter | 56 min |
| Nov 16, 7:57 AM CST | Tornado Warning | BMX | Hale, Marengo, Perry | 48 min |
| Nov 16, 8:35 AM CST | Tornado Warning | BMX | Perry | 40 min |
| Nov 16, 9:08 AM CST | Tornado Warning | BMX | Chilton, Dallas, Perry | 37 min |
| Nov 16, 9:31 AM CST | Tornado Warning | BMX | Jefferson, St. Clair, Shelby | 29 min |
| Nov 16, 9:56 AM CST | Tornado Warning | BMX | Calhoun, St. Clair, Talladega | 34 min |
| Nov 16, 10:20 AM CST | Severe Thunderstorm Warning | BMX | Autauga, Dallas, Elmore, Lowndes, Montgomery | 40 min |
| Nov 16, 10:25 AM CST | Tornado Warning | BMX | Calhoun | 35 min |
| Nov 16, 10:36 AM CST | Tornado Warning | BMX | Lowndes, Montgomery | 24 min |
| Nov 16, 10:56 AM CST | Tornado Warning | BMX | Calhoun, Cherokee, Cleburne | 34 min |
| Nov 16, 10:58 AM CST | Tornado Warning | BMX | Lowndes, Montgomery | 32 min |
| Nov 16, 10:59 AM CST | Tornado Warning | BMX | Elmore, Montgomery | 31 min |
| Nov 16, 11:21 AM CST | Tornado Warning | BMX | Elmore, Macon, Montgomery, Tallapoosa | 39 min |
| Nov 16, 11:40 AM CST | Tornado Warning | BMX | Bullock, Macon, Montgomery | 23 min |
| Nov 16, 11:48 AM CST | Tornado Warning | BMX | Chambers, Lee, Macon | 42 min |
| Nov 16, 12:18 PM CST | Tornado Warning | BMX | Chambers, Lee | 27 min |
| Nov 16, 12:25 PM CST | Tornado Warning | BMX | Bullock, Macon, Russell | 25 min |
| Nov 16, 1:34 PM CST | Special Weather Statement | BMX | Barbour | 41 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.