Alert archive / Alabama / Tornado Warnings in 2011
Tornado Warning 158, NWS Birmingham, AL
NWS Birmingham, AL issued this tornado warning at Nov 16, 2011, 9:56 AM CST for Calhoun County, St. Clair County, Talladega County, Alabama. It was in force for 34 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, 9:56 AM CST (15:56 UTC)
- Expired
- Nov 16, 2011, 10:30 AM CST
- In force
- 34 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Calhoun County, AL, St. Clair County, AL, Talladega County, AL
The radar
The Birmingham radar (KBMX), 79 km from the middle of the area, began a volume at 15:56 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, 3.9 hours before the alert went out and 79 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.
414 WFUS54 KBMX 161556 TORBMX ALC015-115-121-161630- /O.NEW.KBMX.TO.W.0158.111116T1556Z-111116T1630Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 956 AM CST WED NOV 16 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * TORNADO WARNING FOR... WEST CENTRAL CALHOUN COUNTY IN EAST CENTRAL ALABAMA... SOUTHERN ST. CLAIR COUNTY IN ALABAMA... NORTH CENTRAL TALLADEGA COUNTY IN EAST CENTRAL ALABAMA... * UNTIL 1030 AM CST * AT 956 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR BALD ROCK...OR 6 MILES EAST OF MOODY...AND MOVING NORTHEAST AT 40 MPH. * LOCATIONS IMPACTED INCLUDE... PELL CITY...RIVERSIDE...LINCOLN...RAGLAND...WATTSVILLE AND NEELY HENRY DAM. THIS INCLUDES... INTERSTATE 20 EXIT NUMBERS 152 THROUGH 168... 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 3384 8607 3362 8597 3353 8640 3365 8644 TIME...MOT...LOC 1556Z 244DEG 36KT 3360 8635 $$ 19
1 follow-up statement
013 WWUS54 KBMX 161608 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 1008 AM CST WED NOV 16 2011 ALC015-115-121-161630- /O.CON.KBMX.TO.W.0158.000000T0000Z-111116T1630Z/ CALHOUN AL-ST. CLAIR AL-TALLADEGA AL- 1008 AM CST WED NOV 16 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL TALLADEGA... EAST CENTRAL ST. CLAIR AND WEST CENTRAL CALHOUN COUNTIES UNTIL 1030 AM CST... AT 1008 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR RIVERSIDE...OR NEAR PELL CITY...MOVING NORTHEAST AT 40 MPH. LOCATIONS IMPACTED INCLUDE... LINCOLN...RAGLAND AND NEELY HENRY DAM. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3357 8627 3372 8631 3384 8607 3362 8597 TIME...MOT...LOC 1608Z 247DEG 34KT 3364 8622 $$ 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, 9:46 AM CST | Tornado Warning | BMX | Chilton, Coosa | 44 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.