Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 159, NWS Birmingham, AL

November 16, 2011Calhoun County, Alabama

NWS Birmingham, AL issued this tornado warning at Nov 16, 2011, 10:25 AM CST for Calhoun County, Alabama. It was in force for 35 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, 10:25 AM CST (16:25 UTC)
Expired: Nov 16, 2011, 11:00 AM CST
In force: 35 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Calhoun County, AL

The radar

The Birmingham radar (KBMX), 99 km from the middle of the area, began a volume at 16:28 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, 9:46 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.4 hours before the alert went out and 100 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

792 
WFUS54 KBMX 161625
TORBMX
ALC015-161700-
/O.NEW.KBMX.TO.W.0159.111116T1625Z-111116T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1025 AM CST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CALHOUN COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 1100 AM CST

* AT 1025 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR RAGLAND...OR 11 MILES SOUTH OF MARKTON...AND
  MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JACKSONVILLE...OHATCHEE AND WEAVER.

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 3394 8577 3378 8565 3367 8605 3368 8613
      3370 8615 3372 8614 3371 8612 3374 8610
      3377 8605 3380 8607 3382 8606 3395 8582
TIME...MOT...LOC 1625Z 239DEG 37KT 3373 8605

$$

19

2 follow-up statements

894 
WWUS54 KBMX 161635
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1035 AM CST WED NOV 16 2011

ALC015-161700-
/O.CON.KBMX.TO.W.0159.000000T0000Z-111116T1700Z/
CALHOUN AL-
1035 AM CST WED NOV 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN CALHOUN COUNTY
UNTIL 1100 AM CST...

AT 1033 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR OHATCHEE...OR 6 MILES NORTHWEST OF SAKS...
MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  JACKSONVILLE AND WEAVER.

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 3370 8595 3379 8599 3395 8582 3394 8577
      3378 8565
TIME...MOT...LOC 1635Z 240DEG 37KT 3377 8593

$$
STEFKOVICH

301 
WWUS54 KBMX 161647
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1047 AM CST WED NOV 16 2011

ALC015-161700-
/O.CON.KBMX.TO.W.0159.000000T0000Z-111116T1700Z/
CALHOUN AL-
1047 AM CST WED NOV 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL CALHOUN COUNTY
UNTIL 1100 AM CST...

AT 1042 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR WEAVER...OR 6 MILES WEST OF JACKSONVILLE...
MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  JACKSONVILLE.

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 3376 8588 3381 8592 3395 8582 3394 8577
      3378 8565
TIME...MOT...LOC 1647Z 239DEG 37KT 3383 8581

$$

14

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, 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, 10:36 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, 2011 Every tornado warning in 2011 Tornadoes 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.