Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 98, NWS Birmingham, AL

April 5, 2012Lamar County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 5, 2012, 4:17 PM CDT for Lamar County, Alabama. It was in force for 28 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: Apr 5, 2012, 4:17 PM CDT (21:17 UTC)
Expired: Apr 5, 2012, 4:45 PM CDT
In force: 28 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Lamar County, AL

The radar

The Columbus AFB radar (KGWX), 23 km from the middle of the area, began a volume at 21:20 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
Apr 5, 4:25 PM CDT	TSTM WND DMG	Sulligent, AL	SEVERAL TREES WERE KNOCKED DOWN IN AND AROUND SULLIGENT.
Apr 5, 4:28 PM CDT	HAIL 1	Pine Springs, AL	QUARTER SIZE HAIL IN THE PINE SPRINGS COMMUNITY.

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
Apr 5, 9:14 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.3 hours before the alert went out and 152 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: 315 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -91 m²/s²
0-3 km storm-relative helicity: -43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

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

692 
WUUS54 KBMX 052117
SVRBMX
ALC075-052145-
/O.NEW.KBMX.SV.W.0098.120405T2117Z-120405T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
417 PM CDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LAMAR COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 445 PM CDT

* AT 417 PM CDT...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 DETROIT...
  OR 9 MILES NORTHWEST OF SULLIGENT...AND MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SULLIGENT...DETROIT...BEDFORD...LAMAR COUNTY AIRPORT...CREWS...
  BEAVERTON...BLOOMING GROVE AND LAMAR COUNTY PUBLIC LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3400 8822 3404 8822 3406 8821 3406 8806
      3404 8799 3402 8799 3402 8795 3378 8795
      3377 8825
TIME...MOT...LOC 2117Z 286DEG 21KT 3399 8822

$$

75

1 follow-up statement

109 
WWUS54 KBMX 052132
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
432 PM CDT THU APR 5 2012

ALC075-052145-
/O.CON.KBMX.SV.W.0098.000000T0000Z-120405T2145Z/
LAMAR AL-
432 PM CDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN LAMAR
COUNTY UNTIL 445 PM CDT...

AT 432 PM CDT...EMERGENCY MANAGEMENT REPORTED A SEVERE THUNDERSTORM
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR SULLIGENT...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  LAMAR COUNTY AIRPORT...CREWS...BEAVERTON AND BLOOMING GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3406 8820 3405 8803 3404 8799 3402 8799
      3402 8795 3379 8795 3382 8821
TIME...MOT...LOC 2132Z 290DEG 38KT 3395 8810

$$

75

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 9:41 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	64 min
Apr 5, 10:26 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Tuscaloosa	64 min
Apr 5, 11:07 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Perry	53 min
Apr 5, 11:27 AM CDT	Special Weather Statement	BMX	Marengo	48 min
Apr 5, 11:44 AM CDT	Severe Thunderstorm Warning	BMX	Dallas, Marengo	46 min
Apr 5, 12:03 PM CDT	Special Weather Statement	BMX	Chilton, Shelby	57 min
Apr 5, 12:21 PM CDT	Special Weather Statement	BMX	Autauga, Lowndes	54 min
Apr 5, 12:28 PM CDT	Special Weather Statement	BMX	Dallas	32 min
Apr 5, 12:49 PM CDT	Special Weather Statement	BMX	Coosa, Elmore	56 min
Apr 5, 12:56 PM CDT	Special Weather Statement	BMX	Montgomery	64 min
Apr 5, 3:56 PM CDT	Special Weather Statement	BMX	Marion	49 min
Apr 5, 4:41 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion	49 min
Apr 5, 4:52 PM CDT	Special Weather Statement	BMX	Pickens	38 min
Apr 5, 5:09 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Walker, Winston	66 min
Apr 5, 5:24 PM CDT	Special Weather Statement	BMX	Hale	51 min
Apr 5, 5:36 PM CDT	Special Weather Statement	BMX	Tuscaloosa	39 min
Apr 5, 5:38 PM CDT	Severe Thunderstorm Warning	BMX	Walker	52 min
Apr 5, 5:59 PM CDT	Special Weather Statement	BMX	Jefferson	46 min
Apr 5, 6:06 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson	39 min
Apr 5, 6:09 PM CDT	Special Weather Statement	BMX	Dallas	51 min
Apr 5, 6:14 PM CDT	Special Weather Statement	BMX	Blount	46 min
Apr 5, 6:18 PM CDT	Special Weather Statement	BMX	Chilton	42 min
Apr 5, 6:25 PM CDT	Special Weather Statement	BMX	Bibb	65 min
Apr 5, 6:27 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Dallas, Lowndes	48 min
Apr 5, 6:28 PM CDT	Special Weather Statement	BMX	Shelby	47 min
Apr 5, 6:33 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Shelby	42 min
Apr 5, 6:37 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Dallas, Elmore, Perry	53 min
Apr 5, 6:43 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.