Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Birmingham, AL

February 24, 2012Autauga County, Dallas County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 24, 2012, 10:14 AM CST for Autauga County, Dallas County, Alabama. It was in force for 31 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 24, 2012, 10:14 AM CST (16:14 UTC)
Expired: Feb 24, 2012, 10:45 AM CST
In force: 31 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Autauga County, AL, Dallas County, AL

The radar

The Birmingham radar (KBMX), 80 km from the middle of the area, began a volume at 16:16 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.

What was reported inside it

Time	Report	Where	Remark
Feb 24, 10:24 AM CST	HAIL 1	6 Nw Autaugaville, AL	QUARTER SIZE HAIL REPORTED ALONG COUNTY ROAD 33.
Feb 24, 10:36 AM CST	HAIL 0.88	5 Wsw Deatsville, AL	NICKEL SIZED HAIL WAS REPORTED NEAR PINE LEVEL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 24, 7:48 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.2 hours before the alert went out and 81 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: 1167 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

272 
WUUS54 KBMX 241614
SVRBMX
ALC001-047-241645-
/O.NEW.KBMX.SV.W.0023.120224T1614Z-120224T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1014 AM CST FRI FEB 24 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AUTAUGA COUNTY IN ALABAMA...
  EAST CENTRAL DALLAS COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 1045 AM CST

* AT 1014 AM CST...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 TYLER...OR
  NEAR SELMONT-WEST SELMONT...AND MOVING NORTHEAST AT 70 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GARDNER ISLAND...BURNSVILLE...MULBERRY...AUTAUGAVILLE...VIDA
  JUNCTION...BILLINGSLEY...BOOTH AND ROBERT F. HENRY LOCK AND DAM.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBER 186...

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 300 PM CST FRIDAY AFTERNOON
FOR SOUTHERN ALABAMA.

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

LAT...LON 3230 8685 3247 8698 3266 8675 3266 8671
      3271 8669 3271 8657 3251 8641 3248 8641
      3240 8665 3236 8671 3241 8672 3239 8674
      3240 8678 3233 8678 3232 8682 3234 8683
TIME...MOT...LOC 1614Z 237DEG 63KT 3239 8688

$$

19

1 follow-up statement

465 
WWUS54 KBMX 241628
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1028 AM CST FRI FEB 24 2012

ALC047-241637-
/O.CAN.KBMX.SV.W.0023.000000T0000Z-120224T1645Z/
DALLAS AL-
1028 AM CST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DALLAS COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

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

LAT...LON 3243 8671 3250 8675 3271 8669 3271 8657
      3251 8641 3248 8641 3240 8665
TIME...MOT...LOC 1627Z 237DEG 63KT 3251 8665

$$

ALC001-241645-
/O.CON.KBMX.SV.W.0023.000000T0000Z-120224T1645Z/
AUTAUGA AL-
1028 AM CST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
AUTAUGA COUNTY UNTIL 1045 AM CST...

AT 1027 AM CST...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
AUTAUGAVILLE...OR 14 MILES WEST OF PRATTVILLE...MOVING NORTHEAST AT
70 MPH.

LOCATIONS IMPACTED INCLUDE...
  BOOTH AND NEW PROSPECT.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBER 186...

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 3243 8671 3250 8675 3271 8669 3271 8657
      3251 8641 3248 8641 3240 8665
TIME...MOT...LOC 1627Z 237DEG 63KT 3251 8665

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 6:36 AM CST	Areal Flood Advisory	BMX	Autauga, Elmore, Tallapoosa	3 hr
Feb 24, 7:48 AM CST	Severe Thunderstorm Warning	BMX	Chambers	10 min
Feb 24, 9:03 AM CST	Severe Thunderstorm Warning	BMX	Dallas, Lowndes	42 min
Feb 24, 9:08 AM CST	Areal Flood Advisory	BMX	Autauga, Elmore, Lowndes, Montgomery, Tallapoosa	3 hr
Feb 24, 9:32 AM CST	Severe Thunderstorm Warning	BMX	Bullock, Lowndes, Macon, Montgomery	28 min
Feb 24, 9:45 AM CST	Severe Thunderstorm Warning	BMX	Dallas	45 min
Feb 24, 9:50 AM CST	Special Weather Statement	BMX	Chambers, Tallapoosa	55 min
Feb 24, 9:53 AM CST	Severe Thunderstorm Warning	BMX	Bullock, Macon, Montgomery	37 min
Feb 24, 10:18 AM CST	Special Weather Statement	BMX	Macon	42 min
Feb 24, 10:34 AM CST	Tornado Warning	BMX	Pike	31 min
Feb 24, 10:39 AM CST	Special Weather Statement	BMX	Elmore	36 min
Feb 24, 10:59 AM CST	Special Weather Statement	BMX	Tallapoosa	31 min
Feb 24, 11:01 AM CST	Tornado Warning	BMX	Barbour, Bullock	20 min
Feb 24, 11:17 AM CST	Special Weather Statement	BMX	Randolph	28 min
Feb 24, 11:23 AM CST	Special Weather Statement	BMX	Barbour	52 min
Feb 24, 2:44 PM CST	Fire Weather Watch	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.