Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 20, NWS Birmingham, AL

February 24, 20124 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 24, 2012, 9:32 AM CST for 4 counties in Alabama. It was in force for 28 min. 1 report 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, 9:32 AM CST (15:32 UTC)
Expired: Feb 24, 2012, 10:00 AM CST
In force: 28 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Bullock County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL

What was reported inside it

Time	Report	Where	Remark
Feb 24, 9:43 AM CST	TSTM WND DMG	5 Nw Davenport, AL	SEVERAL TREES WERE BLOWN DOWN NEAR INTERSTATE 65.

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, 3.5 hours before the alert went out and 107 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.

745 
WUUS54 KBMX 241532
SVRBMX
ALC011-085-087-101-241600-
/O.NEW.KBMX.SV.W.0020.120224T1532Z-120224T1600Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BULLOCK COUNTY IN SOUTHEAST ALABAMA...
  EAST CENTRAL LOWNDES COUNTY IN SOUTH CENTRAL ALABAMA...
  WEST CENTRAL MACON COUNTY IN SOUTHEAST ALABAMA...
  NORTHERN MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 1000 AM CST

* AT 929 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HAYNEVILLE...AND MOVING EAST AT 70 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MONTGOMERY...MILSTEAD...CANTELOUS...PINTLALA...DANNELLY FIELD...
  WOODCREST...HOPE HULL AND SNOWDOUN.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 158 THROUGH 173...
INTERSTATE 85 EXIT NUMBERS 1 THROUGH 26...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

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 3234 8660 3234 8650 3236 8649 3242 8613
      3241 8605 3243 8599 3244 8600 3245 8596
      3244 8596 3246 8593 3245 8588 3247 8588
      3246 8587 3215 8588 3211 8657
TIME...MOT...LOC 1532Z 259DEG 59KT 3222 8645

$$

56

1 follow-up statement

637 
WWUS54 KBMX 241548
SVSBMX

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

ALC011-085-087-101-241600-
/O.CON.KBMX.SV.W.0020.000000T0000Z-120224T1600Z/
BULLOCK AL-LOWNDES AL-MACON AL-MONTGOMERY AL-
948 AM CST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MONTGOMERY...WEST CENTRAL MACON...EAST CENTRAL LOWNDES AND
NORTHWESTERN BULLOCK COUNTIES UNTIL 1000 AM CST...

AT 945 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
SNOWDOUN...OR 8 MILES SOUTH OF MONTGOMERY...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  MILSTEAD...AUBURN UNIVERSITY IN MONTGOMERY...PIKE ROAD...MOUNT
  MEIGS...WAUGH...TYSONVILLE...SHORTER...VICTORYLAND...BARACHIAS AND
  MITYLENE.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 158 THROUGH 171...
INTERSTATE 85 EXIT NUMBERS 1 THROUGH 26...

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.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

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

LAT...LON 3234 8651 3241 8605 3243 8599 3244 8599
      3245 8596 3244 8596 3246 8593 3245 8588
      3247 8588 3246 8587 3215 8588 3212 8649
TIME...MOT...LOC 1548Z 256DEG 42KT 3225 8621

$$

56

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, 9:45 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, 10:14 AM CST	Severe Thunderstorm Warning	BMX	Autauga, Dallas	31 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.