Alert archive / Alabama / Tornado Warnings in 2015

Tornado Warning 18, NWS Birmingham, AL

December 25, 2015Bibb County, Chilton County, Alabama

NWS Birmingham, AL issued this tornado warning at Dec 25, 2015, 5:25 PM CST for Bibb County, Chilton County, Alabama. It was in force for 21 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: Dec 25, 2015, 5:25 PM CST (23:25 UTC)
Expired: Dec 25, 2015, 5:46 PM CST
In force: 21 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bibb County, AL, Chilton County, AL

The radar

The Birmingham radar (KBMX), 21 km from the middle of the area, began a volume at 23:25 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.4 hours before the alert went out and 22 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: 803 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 370 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

229 
WFUS54 KBMX 252325
TORBMX
ALC007-021-260000-
/O.NEW.KBMX.TO.W.0018.151225T2325Z-151226T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
525 PM CST FRI DEC 25 2015

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CHILTON COUNTY IN CENTRAL ALABAMA...
  SOUTHEASTERN BIBB COUNTY IN CENTRAL ALABAMA...

* UNTIL 600 PM CST
    
* AT 525 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR LAWLEY...OR 9 MILES SOUTHWEST OF
  JEMISON...MOVING NORTHEAST AT 40 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* LOCATIONS IMPACTED INCLUDE...
  CALERA...JEMISON...THORSBY...MAPLESVILLE...CHILTON COUNTY MOTOR
  SPORTS PARK...LAWLEY...LAY LAKE...RANDOLPH...CAMPBELL...MINOOKA
  PARK...WAXAHATCHEE CREEK AND TRIO.

THIS INCLUDES INTERSTATE 65 NEAR MILE MARKER 219.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3293 8704 3307 8684 3307 8661 3306 8662
      3305 8662 3306 8660 3302 8656 3303 8654
      3302 8652 3300 8652 3299 8651 3278 8691
TIME...MOT...LOC 2325Z 233DEG 33KT 3290 8690 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

75

2 follow-up statements

212 
WWUS54 KBMX 252340
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
540 PM CST FRI DEC 25 2015

ALC007-021-260000-
/O.CON.KBMX.TO.W.0018.000000T0000Z-151226T0000Z/
CHILTON AL-BIBB AL-
540 PM CST FRI DEC 25 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CST FOR NORTH
CENTRAL CHILTON AND EAST CENTRAL BIBB COUNTIES...
    
AT 540 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR BRIERFIELD IRONWORKS PARK...OR NEAR JEMISON...MOVING
NORTHEAST AT 35 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE 
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR.  TREE DAMAGE IS 
         LIKELY. 

LOCATIONS IMPACTED INCLUDE...
CALERA...JEMISON...THORSBY...MINOOKA PARK AND CAMPBELL. 

THIS INCLUDES INTERSTATE 65 NEAR MILE MARKER 219.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3285 8686 3299 8695 3307 8684 3307 8661
      3306 8662 3305 8662 3306 8660 3304 8658
TIME...MOT...LOC 2340Z 223DEG 30KT 3300 8683 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

75

081 
WWUS54 KBMX 252346
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
546 PM CST FRI DEC 25 2015

ALC007-021-252356-
/O.CAN.KBMX.TO.W.0018.000000T0000Z-151226T0000Z/
CHILTON AL-BIBB AL-
546 PM CST FRI DEC 25 2015

...THE TORNADO WARNING FOR NORTH CENTRAL CHILTON AND EAST CENTRAL
BIBB COUNTIES IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED.
MOVED OUT OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN
CANCELLED.

LAT...LON 3285 8686 3299 8695 3307 8684 3307 8661
      3306 8662 3305 8662 3306 8660 3304 8658
TIME...MOT...LOC 2345Z 233DEG 33KT 3303 8678 

$$

75

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 24, 8:03 PM CST	Special Weather Statement	BMX	Sumter	27 min
Dec 24, 8:31 PM CST	Special Weather Statement	BMX	Greene, Sumter	29 min
Dec 24, 9:57 PM CST	Flash Flood Warning	BMX	Autauga, Elmore, Lowndes, Montgomery	3 hr
Dec 25, 12:56 AM CST	Areal Flood Warning	BMX	Barbour, Bullock, Macon, Pike, Russell	12 hr
Dec 25, 1:08 AM CST	Flash Flood Warning	BMX	Chambers, Chilton, Coosa, Elmore, Lee, Tallapoosa	6 hr
Dec 25, 1:15 AM CST	Flash Flood Warning	BMX	Autauga, Dallas, Lowndes, Montgomery	6 hr
Dec 25, 4:24 AM CST	Flash Flood Watch	BMX	Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more	17 hr
Dec 25, 7:14 AM CST	Areal Flood Warning	BMX	Chambers, Elmore, Lee, Montgomery, Tallapoosa	2 hr
Dec 25, 7:21 AM CST	Flash Flood Warning	BMX	Chilton, Shelby, Talladega	3 hr
Dec 25, 7:40 AM CST	Special Weather Statement	BMX	Marion	50 min
Dec 25, 7:48 AM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion, Winston	42 min
Dec 25, 8:35 AM CST	Special Weather Statement	BMX	Winston	40 min
Dec 25, 9:17 AM CST	Areal Flood Advisory	BMX	Lamar, Marion, Winston	3 hr
Dec 25, 9:40 AM CST	Areal Flood Advisory	BMX	Winston	3 hr
Dec 25, 9:42 AM CST	River Flood Warning	BMX	Autauga, Dallas, Elmore, Lowndes, Montgomery	11 days
Dec 25, 9:42 AM CST	River Flood Warning	BMX	Autauga, Dallas, Lowndes	8 days
Dec 25, 9:42 AM CST	River Flood Warning	BMX	Dallas	9 days
Dec 25, 10:30 AM CST	Flash Flood Warning Emergency	BMX	Marion, Winston	9 hr
Dec 25, 11:51 AM CST	Areal Flood Advisory	BMX	Blount	3 hr
Dec 25, 12:36 PM CST	Flash Flood Warning	BMX	Blount	3 hr
Dec 25, 12:43 PM CST	Areal Flood Advisory	BMX	Fayette, Lamar, Marion, Walker	3 hr
Dec 25, 2:28 PM CST	Special Weather Statement	BMX	Cherokee, Etowah	32 min
Dec 25, 2:50 PM CST	Flash Flood Warning	BMX	Fayette, Lamar, Walker	5 hr
Dec 25, 3:04 PM CST	Areal Flood Advisory	BMX	Blount, Cherokee, Etowah, Jefferson, St. Clair, Walker	3 hr
Dec 25, 3:13 PM CST	Special Weather Statement	BMX	Fayette	47 min
Dec 25, 3:31 PM CST	Special Weather Statement	BMX	Perry	44 min
Dec 25, 3:35 PM CST	Tornado Warning	BMX	Tuscaloosa	25 min
Dec 25, 3:49 PM CST	Flash Flood Warning	BMX	Blount	8 hr
Dec 25, 4:24 PM CST	Tornado Warning	BMX	Jefferson	36 min
Dec 25, 4:28 PM CST	Flash Flood Warning	BMX	Blount, Jefferson, St. Clair, Walker	3 hr
Dec 25, 4:55 PM CST	Tornado Warning	BMX	Jefferson	50 min
Dec 25, 5:44 PM CST	Flash Flood Warning	BMX	Fayette, Jefferson, Tuscaloosa, Walker	3 hr

Nearby

Tornado Warnings in Alabama, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.