Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 284, NWS Birmingham, AL

September 3, 2012Greene County, Pickens County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Sep 3, 2012, 6:40 PM CDT for Greene County, Pickens County, Alabama. It was in force for 50 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: Sep 3, 2012, 6:40 PM CDT (23:40 UTC)
Expired: Sep 3, 2012, 7:30 PM CDT
In force: 50 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Greene County, AL, Pickens County, AL

The radar

The Birmingham radar (KBMX), 102 km from the middle of the area, began a volume at 23:41 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
Sep 3, 3:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.7 hours before the alert went out and 101 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: 215 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1125 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

096 
WUUS54 KBMX 032340
SVRBMX
ALC063-107-040030-
/O.NEW.KBMX.SV.W.0284.120903T2340Z-120904T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
640 PM CDT MON SEP 3 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GREENE COUNTY IN WEST CENTRAL ALABAMA...
  SOUTHEASTERN PICKENS COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 730 PM CDT

* AT 637 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR BENEVOLA...
  OR 8 MILES EAST OF ALICEVILLE...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EUTAW...BENEVOLA...JENA...MANTUA...UNION...KNOXVILLE...PIONEER AND
  LEWISTON.

THIS INCLUDES...
INTERSTATE 20 EXIT NUMBERS 40 THROUGH 52...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT MONDAY EVENING
FOR SOUTHERN ALABAMA.

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

LAT...LON 3324 8784 3302 8784 3301 8776 3295 8775
      3294 8773 3293 8778 3291 8776 3290 8780
      3289 8780 3286 8783 3284 8784 3280 8804
      3316 8814
TIME...MOT...LOC 2340Z 336DEG 18KT 3314 8801

$$

GRANTHAM

2 follow-up statements

326 
WWUS54 KBMX 040003
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
703 PM CDT MON SEP 3 2012

ALC063-107-040030-
/O.CON.KBMX.SV.W.0284.000000T0000Z-120904T0030Z/
GREENE AL-PICKENS AL-
703 PM CDT MON SEP 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PICKENS AND NORTHEASTERN GREENE COUNTIES UNTIL 730 PM CDT...

AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
BENEVOLA...OR 14 MILES EAST OF ALICEVILLE...MOVING SOUTHEAST AT 20
MPH.

LOCATIONS IMPACTED INCLUDE...
  EUTAW...MANTUA...UNION...KNOXVILLE...SNODDY...CLINTON AND I 20 REST
  AREA NEAR EUTAW.

THIS INCLUDES...
INTERSTATE 20 EXIT NUMBERS 40 THROUGH 52...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

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

LAT...LON 3324 8784 3302 8784 3301 8776 3295 8775
      3294 8773 3293 8777 3291 8776 3290 8780
      3286 8783 3284 8784 3280 8804 3311 8807
TIME...MOT...LOC 0004Z 331DEG 17KT 3309 8791

$$

GRANTHAM

339 
WWUS54 KBMX 040020
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
720 PM CDT MON SEP 3 2012

ALC063-107-040030-
/O.EXP.KBMX.SV.W.0284.000000T0000Z-120904T0030Z/
GREENE AL-PICKENS AL-
720 PM CDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PICKENS AND
NORTHEASTERN GREENE COUNTIES WILL EXPIRE AT 730 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

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

LAT...LON 3324 8784 3302 8784 3301 8776 3295 8775
      3294 8773 3293 8777 3291 8776 3290 8780
      3286 8783 3284 8784 3280 8804 3311 8807
TIME...MOT...LOC 0020Z 331DEG 17KT 3302 8787

$$

GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 7:06 PM CDT	Special Weather Statement	BMX	Blount	39 min
Sep 2, 7:17 PM CDT	Areal Flood Advisory	BMX	Marion, Winston	118 min
Sep 2, 7:20 PM CDT	Special Weather Statement	BMX	DeKalb	25 min
Sep 2, 7:30 PM CDT	Special Weather Statement	BMX	Marion, Winston	45 min
Sep 2, 7:47 PM CDT	Special Weather Statement	BMX	Marion	28 min
Sep 2, 7:58 PM CDT	Special Weather Statement	BMX	Etowah	47 min
Sep 2, 8:14 PM CDT	Special Weather Statement	BMX	Marion, Winston	46 min
Sep 2, 8:23 PM CDT	Special Weather Statement	BMX	Cherokee	52 min
Sep 2, 9:05 PM CDT	Special Weather Statement	BMX	Winston	25 min
Sep 2, 9:10 PM CDT	Areal Flood Advisory	BMX	Etowah	110 min
Sep 2, 9:12 PM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	48 min
Sep 2, 9:27 PM CDT	Areal Flood Advisory	BMX	Marion, Winston	108 min
Sep 2, 9:43 PM CDT	Special Weather Statement	BMX	Winston	47 min
Sep 2, 9:56 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion	49 min
Sep 2, 9:58 PM CDT	Areal Flood Advisory	BMX	Lamar	2 hr
Sep 2, 10:45 PM CDT	Special Weather Statement	BMX	Walker, Winston	45 min
Sep 2, 10:49 PM CDT	Special Weather Statement	BMX	Lamar, Pickens	41 min
Sep 2, 11:33 PM CDT	Special Weather Statement	BMX	Blount, Jefferson, Pickens, Tuscaloosa	57 min
Sep 3, 8:57 AM CDT	Areal Flood Advisory	BMX	Blount, Jefferson, St. Clair, Walker	3 hr
Sep 3, 2:43 PM CDT	Special Weather Statement	BMX	Lee, Macon, Russell	62 min
Sep 3, 3:10 PM CDT	Severe Thunderstorm Warning	BMX	Hale, Tuscaloosa	50 min
Sep 3, 3:13 PM CDT	Areal Flood Advisory	BMX	Lee, Macon, Russell	2 hr
Sep 3, 3:35 PM CDT	Special Weather Statement	BMX	Bibb, Perry	55 min
Sep 3, 3:48 PM CDT	Special Weather Statement	BMX	Barbour, Bullock, Russell	42 min
Sep 3, 3:55 PM CDT	Severe Thunderstorm Warning	BMX	Perry	35 min
Sep 3, 3:59 PM CDT	Tornado Warning	BMX	Perry	13 min
Sep 3, 4:27 PM CDT	Special Weather Statement	BMX	Barbour	48 min
Sep 3, 4:29 PM CDT	Areal Flood Advisory	BMX	Tuscaloosa	2 hr
Sep 3, 4:32 PM CDT	Special Weather Statement	BMX	Autauga, Chilton, Dallas, Perry	58 min
Sep 3, 5:04 PM CDT	Special Weather Statement	BMX	Jefferson	26 min
Sep 3, 5:07 PM CDT	Special Weather Statement	BMX	Hale	23 min
Sep 3, 5:08 PM CDT	Special Weather Statement	BMX	Hale	37 min
Sep 3, 5:22 PM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	38 min
Sep 3, 5:30 PM CDT	Areal Flood Advisory	BMX	Jefferson	2 hr
Sep 3, 5:31 PM CDT	Severe Thunderstorm Warning	BMX	Hale	44 min
Sep 3, 5:41 PM CDT	Special Weather Statement	BMX	Elmore	49 min
Sep 3, 5:43 PM CDT	Special Weather Statement	BMX	Dallas	47 min
Sep 3, 5:47 PM CDT	Special Weather Statement	BMX	Jefferson	43 min
Sep 3, 5:49 PM CDT	Areal Flood Advisory	BMX	Hale, Perry	116 min
Sep 3, 5:50 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	55 min
Sep 3, 5:54 PM CDT	Severe Thunderstorm Warning	BMX	Perry	51 min
Sep 3, 6:10 PM CDT	Special Weather Statement	BMX	Tuscaloosa	50 min
Sep 3, 6:16 PM CDT	Severe Thunderstorm Warning	BMX	Hale	44 min
Sep 3, 6:19 PM CDT	Flash Flood Warning	BMX	Hale, Perry	3 hr
Sep 3, 6:21 PM CDT	Special Weather Statement	BMX	Walker	24 min
Sep 3, 6:28 PM CDT	Special Weather Statement	BMX	Jefferson	47 min
Sep 3, 6:29 PM CDT	Special Weather Statement	BMX	Greene	61 min
Sep 3, 6:32 PM CDT	Special Weather Statement	BMX	Bullock	58 min
Sep 3, 6:54 PM CDT	Flash Flood Warning	BMX	Hale, Tuscaloosa	3 hr
Sep 3, 6:57 PM CDT	Severe Thunderstorm Warning	BMX	Hale	63 min

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; radar from the NEXRAD Level II archive.