Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 36, NWS Birmingham, AL

March 2, 2012Marengo County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 2, 2012, 4:53 PM CST for Marengo County, Alabama. It was in force for 52 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: Mar 2, 2012, 4:53 PM CST (22:53 UTC)
Expired: Mar 2, 2012, 5:45 PM CST
In force: 52 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Marengo County, AL

The radar

The Birmingham radar (KBMX), 154 km from the middle of the area, began a volume at 22:55 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
Mar 2, 4:37 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.9 hours before the alert went out and 154 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: 544 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 530 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

231 
WUUS54 KBMX 022253
SVRBMX
ALC091-022345-
/O.NEW.KBMX.SV.W.0036.120302T2253Z-120302T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
453 PM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MARENGO COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 545 PM CST

* AT 451 PM 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 6 MILES SOUTH OF
  PUTNAM...OR 21 MILES NORTHWEST OF GROVE HILL...AND MOVING NORTHEAST
  AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DIXONS MILL...WAYNE...SURGINER...SHILOH...VINELAND...MAGNOLIA...
  NICHOLSVILLE AND SHAWNEE.

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 MIDNIGHT CST SATURDAY MORNING
FOR ALABAMA.

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

LAT...LON 3222 8766 3213 8759 3212 8762 3201 8762
      3200 8763 3200 8765 3198 8767 3198 8794
      3199 8808 3199 8803
TIME...MOT...LOC 2253Z 244DEG 31KT 3194 8799

$$

GRANTHAM

2 follow-up statements

850 
WWUS54 KBMX 022309
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
509 PM CST FRI MAR 2 2012

ALC091-022345-
/O.CON.KBMX.SV.W.0036.000000T0000Z-120302T2345Z/
MARENGO AL-
509 PM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MARENGO COUNTY UNTIL 545 PM CST...

AT 506 PM 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
BASHI...OR 19 MILES NORTH OF GROVE HILL...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  DIXONS MILL...SURGINER...VINELAND...MAGNOLIA AND SHAWNEE.

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 3199 8797 3218 8764 3213 8759 3212 8762
      3201 8762 3200 8763 3200 8765 3198 8767
      3198 8794 3199 8808
TIME...MOT...LOC 2309Z 245DEG 30KT 3199 8784

$$

GRANTHAM

330 
WWUS54 KBMX 022324
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
524 PM CST FRI MAR 2 2012

ALC091-022345-
/O.CON.KBMX.SV.W.0036.000000T0000Z-120302T2345Z/
MARENGO AL-
524 PM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MARENGO COUNTY UNTIL 545 PM CST...

AT 521 PM 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
SURGINER...OR 20 MILES SOUTH OF LINDEN...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  VINELAND.

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 3198 8785 3203 8780 3216 8762 3213 8759
      3212 8762 3201 8762 3200 8763 3200 8765
      3198 8767
TIME...MOT...LOC 2324Z 250DEG 33KT 3203 8768

$$

GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 4:53 AM CST	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	13 hr
Mar 2, 2:46 PM CST	Severe Thunderstorm Warning	BMX	Marion	44 min
Mar 2, 2:59 PM CST	Severe Thunderstorm Warning	BMX	Lamar, Pickens	46 min
Mar 2, 3:26 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Pickens, Tuscaloosa	49 min
Mar 2, 3:38 PM CST	Severe Thunderstorm Warning	BMX	Lamar, Marion	52 min
Mar 2, 3:47 PM CST	Severe Thunderstorm Warning	BMX	Winston	43 min
Mar 2, 4:05 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Jefferson, Tuscaloosa, Walker	40 min
Mar 2, 4:16 PM CST	Severe Thunderstorm Warning	BMX	Walker	44 min
Mar 2, 4:23 PM CST	Severe Thunderstorm Warning	BMX	Marion, Winston	31 min
Mar 2, 4:39 PM CST	Severe Thunderstorm Warning	BMX	Jefferson, Walker	53 min
Mar 2, 4:46 PM CST	Severe Thunderstorm Warning	BMX	Blount	48 min
Mar 2, 5:16 PM CST	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair	44 min
Mar 2, 5:43 PM CST	Tornado Warning	BMX	Lowndes	47 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.