Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 264, NWS Birmingham, AL

July 31, 2012Elmore County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 31, 2012, 3:14 AM CDT for Elmore 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: Jul 31, 2012, 3:14 AM CDT (08:14 UTC)
Expired: Jul 31, 2012, 3:58 AM CDT
In force: 44 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Elmore County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 31, 1:23 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 8.2 hours before the alert went out and 92 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: 771 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1852 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

977 
WUUS54 KBMX 310814
SVRBMX
ALC051-310915-
/O.NEW.KBMX.SV.W.0264.120731T0814Z-120731T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
314 AM CDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ELMORE COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 415 AM CDT

* AT 312 AM CDT...THE NATIONAL WEATHER SERVICE INDICATED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM LYLE TO 6 MILES SOUTHWEST OF MARBURY...AND MOVING SOUTHEAST AT
  40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MILLBROOK...WETUMPKA...TALLASSEE...TITUS...DEATSVILLE...WEOKA
  MILLS...TEN CEDAR ESTATES AND ELMORE.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 179 THROUGH 181...

WINDS OF 70 TO 80 MPH WILL UPROOT TREES...DOWN POWER LINES AND CAUSE
DAMAGE TO HOMES AND STRUCTURES.

THIS IS A DANGEROUS STORM. IF YOUR ARE IN ITS PATH...PREPARE
IMMEDAITELY FOR DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758 OR TWEET YOUR REPORT USING HASHTAG ALWX

LAT...LON 3243 8619 3246 8619 3250 8626 3247 8629
      3249 8631 3241 8631 3243 8637 3241 8641
      3275 8641 3277 8633 3275 8631 3275 8606
      3263 8589 3245 8588 3245 8599 3243 8599
      3240 8605
TIME...MOT...LOC 0815Z 312DEG 37KT 3282 8631 3264 8654

$$

GRANTHAM

3 follow-up statements

903 
WWUS54 KBMX 310832
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
332 AM CDT TUE JUL 31 2012

ALC051-310915-
/O.CON.KBMX.SV.W.0264.000000T0000Z-120731T0915Z/
ELMORE AL-
332 AM CDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN ELMORE
COUNTY UNTIL 415 AM CDT...

AT 330 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM WEOKA MILLS TO PRATTVILLE...MOVING SOUTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  MILLBROOK...WETUMPKA...TEN CEDAR ESTATES...ELMORE...COOSADA...BLUE
  RIDGE...EMERALD MOUNTAIN...SPEIGNER...JORDAN DAM AND WETUMPKA
  MUNICIPAL AIRPORT.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 179 THROUGH 181...

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3243 8618 3246 8619 3250 8625 3247 8629
      3249 8631 3244 8632 3241 8631 3243 8637
      3241 8641 3275 8641 3276 8632 3245 8599
      3243 8599 3242 8604 3240 8605
TIME...MOT...LOC 0831Z 312DEG 37KT 3270 8626 3250 8646

$$

GRANTHAM

161 
WWUS54 KBMX 310848
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
348 AM CDT TUE JUL 31 2012

ALC051-310915-
/O.CON.KBMX.SV.W.0264.000000T0000Z-120731T0915Z/
ELMORE AL-
348 AM CDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
ELMORE COUNTY UNTIL 415 AM CDT...

AT 344 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM SANTUCK TO HUNTER...MOVING SOUTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  BLUE RIDGE.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 179 THROUGH 181...

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3242 8612 3243 8613 3242 8616 3250 8625
      3247 8629 3249 8631 3245 8632 3241 8632
      3243 8634 3243 8637 3241 8641 3264 8641
      3242 8604 3241 8605
TIME...MOT...LOC 0848Z 312DEG 37KT 3257 8611 3238 8631

$$

GRANTHAM

549 
WWUS54 KBMX 310858
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
358 AM CDT TUE JUL 31 2012

ALC051-310908-
/O.CAN.KBMX.SV.W.0264.000000T0000Z-120731T0915Z/
ELMORE AL-
358 AM CDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ELMORE COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND MOVED
OUT OF THE WARNED AREA.

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3242 8612 3243 8613 3242 8616 3250 8625
      3247 8629 3249 8631 3245 8632 3241 8632
      3243 8634 3243 8637 3241 8641 3264 8641
      3242 8604 3241 8605
TIME...MOT...LOC 0858Z 312DEG 37KT 3249 8603 3230 8623

$$

GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:18 PM CDT	Severe Thunderstorm Warning	BMX	Pike	27 min
Jul 30, 7:25 PM CDT	Areal Flood Advisory	BMX	Pike	3 hr
Jul 30, 8:13 PM CDT	Flash Flood Warning	BMX	Pike	3 hr
Jul 30, 11:57 PM CDT	Severe Thunderstorm Warning	BMX	Marion	78 min
Jul 31, 12:15 AM CDT	Special Weather Statement	BMX	Walker, Winston	45 min
Jul 31, 12:27 AM CDT	Special Weather Statement	BMX	St. Clair	48 min
Jul 31, 12:32 AM CDT	Severe Thunderstorm Warning	BMX	Blount	43 min
Jul 31, 12:34 AM CDT	Severe Thunderstorm Warning	BMX	Winston	56 min
Jul 31, 12:48 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair	57 min
Jul 31, 12:57 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	48 min
Jul 31, 1:01 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	74 min
Jul 31, 1:24 AM CDT	Areal Flood Advisory	BMX	Winston	2 hr
Jul 31, 1:36 AM CDT	Areal Flood Advisory	BMX	Jefferson, St. Clair, Shelby, Walker	3 hr
Jul 31, 1:40 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby, Talladega	65 min
Jul 31, 1:53 AM CDT	Flash Flood Warning	BMX	Jefferson	3 hr
Jul 31, 2:10 AM CDT	Flash Flood Warning	BMX	Shelby	3 hr
Jul 31, 2:20 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Coosa	70 min
Jul 31, 2:40 AM CDT	Special Weather Statement	BMX	Marion, Winston	65 min
Jul 31, 3:01 AM CDT	Severe Thunderstorm Warning	BMX	Autauga	74 min
Jul 31, 3:06 AM CDT	Special Weather Statement	BMX	Winston	24 min
Jul 31, 3:20 AM CDT	Severe Thunderstorm Warning	BMX	Marion, Walker, Winston	55 min
Jul 31, 3:37 AM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	53 min
Jul 31, 4:09 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby, Walker	71 min
Jul 31, 4:38 AM CDT	Flash Flood Warning	BMX	Jefferson, Shelby	3 hr
Jul 31, 4:40 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Jefferson, Shelby, Walker	39 min
Jul 31, 6:11 AM CDT	Special Weather Statement	BMX	Dallas, Hale, Perry	49 min
Jul 31, 6:36 AM CDT	Special Weather Statement	BMX	Blount, Etowah, St. Clair	39 min
Jul 31, 7:28 AM CDT	Flash Flood Warning	BMX	Jefferson, Shelby	3 hr
Jul 31, 8:32 AM CDT	Flash Flood Warning	BMX	Lowndes	2 hr
Jul 31, 8:44 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby, Talladega, Walker	46 min
Jul 31, 9:08 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa, Shelby, Talladega	26 min
Jul 31, 10:30 AM CDT	Areal Flood Warning	BMX	Jefferson, Shelby	6 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 Every severe thunderstorm warning in 2012

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.