Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 69, NWS Birmingham, AL

March 16, 2012Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 16, 2012, 3:04 PM CDT for Winston County, Alabama. It was in force for 26 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: Mar 16, 2012, 3:04 PM CDT (20:04 UTC)
Expired: Mar 16, 2012, 3:30 PM CDT
In force: 26 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Winston County, AL

The radar

The Columbus AFB radar (KGWX), 107 km from the middle of the area, began a volume at 20:06 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
Mar 16, 3:06 PM CDT	HAIL 0.5	Corinth Rec Area, AL	ONE HALF INCH HAIL REPORTED AT THE CORINTH RECREATION AREA.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.1 hours before the alert went out and 112 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: 769 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 68 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.

559 
WUUS54 KBMX 162004
SVRBMX
ALC133-162045-
/O.NEW.KBMX.SV.W.0069.120316T2004Z-120316T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
304 PM CDT FRI MAR 16 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL WINSTON COUNTY IN NORTHWEST ALABAMA...

* UNTIL 345 PM CDT

* AT 302 PM CDT...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
  CORINTH REC AREA...OR 6 MILES WEST OF ARLEY...AND MOVING EAST AT 15
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  ARLEY...FALLS CITY...HELICON...NESMITH...HOUSTON AND ADDISON TOWN
  HALL.

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 3419 8710 3403 8711 3401 8739 3413 8741
      3422 8711
TIME...MOT...LOC 2004Z 255DEG 14KT 3411 8730

$$

56

2 follow-up statements

178 
WWUS54 KBMX 162017
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
317 PM CDT FRI MAR 16 2012

ALC133-162045-
/O.CON.KBMX.SV.W.0069.000000T0000Z-120316T2045Z/
WINSTON AL-
317 PM CDT FRI MAR 16 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WINSTON COUNTY UNTIL 345 PM CDT...

AT 313 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING 
PENNY SIZE HAIL. THIS STORM WAS LOCATED EAST OF THE CORINTH REC 
AREA...OR NEAR ARLEY...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  ARLEY...FALLS CITY...HELICON...NESMITH AND HOUSTON.

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

LAT...LON 3405 8735 3414 8736 3421 8711 3417 8711
      3407 8711
TIME...MOT...LOC 2016Z 255DEG 14KT 3411 8726

$$

56

298 
WWUS54 KBMX 162030
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
330 PM CDT FRI MAR 16 2012

ALC133-162041-
/O.CAN.KBMX.SV.W.0069.000000T0000Z-120316T2045Z/
WINSTON AL-
330 PM CDT FRI MAR 16 2012

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

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED.

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

LAT...LON 3405 8735 3414 8736 3421 8711 3417 8711
      3407 8711
TIME...MOT...LOC 2031Z 255DEG 14KT 3414 8718

$$

56

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 9:18 PM CDT	Special Weather Statement	BMX	Marion	27 min
Mar 15, 9:25 PM CDT	Special Weather Statement	BMX	DeKalb	50 min
Mar 15, 10:40 PM CDT	Special Weather Statement	BMX	Walker	50 min
Mar 16, 12:54 PM CDT	Special Weather Statement	BMX	Marion	36 min
Mar 16, 1:02 PM CDT	Special Weather Statement	BMX	Calhoun, Cherokee, Etowah	43 min
Mar 16, 1:13 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	29 min
Mar 16, 1:27 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	15 min
Mar 16, 2:17 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	26 min
Mar 16, 2:52 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	38 min
Mar 16, 3:01 PM CDT	Special Weather Statement	BMX	Winston	44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.