Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 64, NWS Birmingham, AL

March 15, 2012Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 15, 2012, 6:50 PM CDT for Winston County, Alabama. It was in force for 29 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 15, 2012, 6:50 PM CDT (23:50 UTC)
Expired: Mar 15, 2012, 7:19 PM CDT
In force: 29 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Winston County, AL

The radar

The Columbus AFB radar (KGWX), 109 km from the middle of the area, began a volume at 23:51 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.8 hours before the alert went out and 128 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: 1196 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

250 
WUUS54 KBMX 152350
SVRBMX
ALC133-160030-
/O.NEW.KBMX.SV.W.0064.120315T2350Z-120316T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
650 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN WINSTON COUNTY IN NORTHWEST ALABAMA...

* UNTIL 730 PM CDT

* AT 646 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM
  WAS LOCATED NEAR MORELAND...OR 13 MILES NORTHWEST OF ARLEY...AND
  MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BRUSHY LAKE...INMANFIELD AND UPSHAW.

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.

LAT...LON 3430 8731 3430 8711 3430 8710 3425 8710
      3422 8711 3420 8728 3421 8735 3430 8734
      3431 8733
TIME...MOT...LOC 2350Z 247DEG 14KT 3425 8730

$$

61

3 follow-up statements

388 
WWUS54 KBMX 160002
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
702 PM CDT THU MAR 15 2012

ALC133-160030-
/O.CON.KBMX.SV.W.0064.000000T0000Z-120316T0030Z/
WINSTON AL-
702 PM CDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
WINSTON COUNTY UNTIL 730 PM CDT...

AT 700 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR BRUSHY LAKE...OR 12 MILES NORTH OF ARLEY...
MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  INMANFIELD AND UPSHAW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

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

LAT...LON 3423 8725 3424 8728 3428 8728 3430 8726
      3430 8710 3424 8710 3423 8711
TIME...MOT...LOC 0002Z 250DEG 17KT 3427 8723

$$

61

442 
WWUS54 KBMX 160014
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
714 PM CDT THU MAR 15 2012

ALC133-160030-
/O.CON.KBMX.SV.W.0064.000000T0000Z-120316T0030Z/
WINSTON AL-
714 PM CDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
WINSTON COUNTY UNTIL 730 PM CDT...

AT 709 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR INMANFIELD...OR 12 MILES NORTH OF ARLEY...
MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  UPSHAW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

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

LAT...LON 3425 8722 3427 8724 3428 8724 3430 8723
      3430 8710 3425 8710
TIME...MOT...LOC 0014Z 259DEG 14KT 3427 8718

$$

61

515 
WWUS54 KBMX 160019
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
719 PM CDT THU MAR 15 2012

ALC133-160029-
/O.CAN.KBMX.SV.W.0064.000000T0000Z-120316T0030Z/
WINSTON AL-
719 PM CDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WINSTON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

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

LAT...LON 3425 8722 3427 8724 3428 8724 3430 8723
      3430 8710 3425 8710
TIME...MOT...LOC 0019Z 259DEG 14KT 3427 8716

$$

61

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 2:33 AM CDT	Dense Fog Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	7 hr
Mar 15, 5:33 PM CDT	Special Weather Statement	BMX	Marion	12 min
Mar 15, 5:50 PM CDT	Special Weather Statement	BMX	Winston	25 min
Mar 15, 6:15 PM CDT	Special Weather Statement	BMX	Winston	30 min
Mar 15, 6:43 PM CDT	Special Weather Statement	BMX	Winston	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.