Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 118, NWS Birmingham, AL

June 12, 2021Autauga County, Dallas County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 12, 2021, 2:31 PM CDT for Autauga County, Dallas County, Alabama. It was in force for 44 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: Jun 12, 2021, 2:31 PM CDT (19:31 UTC)
Expired: Jun 12, 2021, 3:15 PM CDT
In force: 44 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Autauga County, AL, Dallas County, AL

The radar

The Birmingham radar (KBMX), 85 km from the middle of the area, began a volume at 19:34 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
Jun 12, 2:48 PM CDT	TSTM WND DMG	3 Ne Burnsville, AL	TREES DOWN ACROSS ROAD ON COUNTY ROAD 1 NEAR FIG TREE DR. TIME ESTIMATED BY RADAR.

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, 7.5 hours before the alert went out and 86 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: 2156 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

823 
WUUS54 KBMX 121931
SVRBMX
ALC001-047-122015-
/O.NEW.KBMX.SV.W.0118.210612T1931Z-210612T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
231 PM CDT Sat Jun 12 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Western Autauga County in central Alabama...
  Northeastern Dallas County in south central Alabama...

* Until 315 PM CDT.

* At 230 PM CDT, a severe thunderstorm was located near Burnsville,
  or 7 miles east of Valley Grande, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Valley Grande, Autaugaville, Benton, Mulberry, Gardner Island, Paul
  M Grist State Park, Tyler, Burnsville, Robert F. Henry Lock And
  Dam, Valley Creek Junction, Plantersville, Barrett Creek and Dawson
  Mill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3257 8703 3266 8696 3266 8682 3239 8660
      3238 8662 3240 8662 3240 8665 3237 8666
      3235 8668 3236 8671 3240 8672 3239 8675
      3239 8678 3234 8677 3231 8682 3234 8682
      3233 8685 3231 8685 3230 8683 3227 8689
TIME...MOT...LOC 1930Z 323DEG 22KT 3254 8686 

HAIL...<.75IN
WIND...60MPH
 
$$

25/Owen

1 follow-up statement

263 
WWUS54 KBMX 122005
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
305 PM CDT Sat Jun 12 2021

ALC001-047-122015-
/O.EXP.KBMX.SV.W.0118.000000T0000Z-210612T2015Z/
Autauga AL-Dallas AL-
305 PM CDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN AUTAUGA AND
NORTHEASTERN DALLAS COUNTIES WILL EXPIRE AT 315 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3257 8703 3266 8696 3266 8682 3239 8660
      3238 8662 3240 8662 3240 8665 3237 8666
      3235 8668 3236 8671 3240 8672 3239 8675
      3239 8678 3234 8677 3231 8682 3234 8682
      3233 8685 3231 8685 3230 8683 3227 8689
TIME...MOT...LOC 2005Z 323DEG 22KT 3239 8673 

$$

25/Owen

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 12:17 PM CDT	Special Weather Statement	BMX	Winston	28 min
Jun 12, 12:37 PM CDT	Special Weather Statement	BMX	Bibb	23 min
Jun 12, 12:48 PM CDT	Special Weather Statement	BMX	Winston	27 min
Jun 12, 1:01 PM CDT	Special Weather Statement	BMX	Bullock	29 min
Jun 12, 1:05 PM CDT	Special Weather Statement	BMX	Bibb	25 min
Jun 12, 1:17 PM CDT	Special Weather Statement	BMX	Walker	43 min
Jun 12, 1:24 PM CDT	Special Weather Statement	BMX	Tuscaloosa	36 min
Jun 12, 1:25 PM CDT	Special Weather Statement	BMX	Tuscaloosa	35 min
Jun 12, 1:35 PM CDT	Special Weather Statement	BMX	Chilton	25 min
Jun 12, 2:05 PM CDT	Special Weather Statement	BMX	Chilton	25 min
Jun 12, 2:11 PM CDT	Severe Thunderstorm Warning	BMX	Chilton	17 min
Jun 12, 2:20 PM CDT	Special Weather Statement	BMX	Walker	40 min
Jun 12, 2:39 PM CDT	Special Weather Statement	BMX	Montgomery	36 min
Jun 12, 2:49 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	18 min
Jun 12, 2:59 PM CDT	Special Weather Statement	BMX	Montgomery	31 min
Jun 12, 3:26 PM CDT	Special Weather Statement	BMX	Winston	34 min
Jun 12, 3:34 PM CDT	Special Weather Statement	BMX	Tuscaloosa	41 min
Jun 12, 3:53 PM CDT	Special Weather Statement	BMX	Winston	37 min
Jun 12, 4:05 PM CDT	Special Weather Statement	BMX	Pike	40 min
Jun 12, 4:18 PM CDT	Special Weather Statement	BMX	Walker	42 min
Jun 12, 4:24 PM CDT	Special Weather Statement	BMX	Tuscaloosa	51 min
Jun 12, 4:56 PM CDT	Special Weather Statement	BMX	Tuscaloosa	49 min
Jun 12, 5:01 PM CDT	Areal Flood Advisory	BMX	Fayette, Tuscaloosa, Walker	119 min
Jun 12, 5:19 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	28 min
Jun 12, 5:28 PM CDT	Special Weather Statement	BMX	Fayette	32 min
Jun 12, 5:44 PM CDT	Special Weather Statement	BMX	Pickens	31 min
Jun 12, 5:45 PM CDT	Special Weather Statement	BMX	Greene	45 min
Jun 12, 5:49 PM CDT	Special Weather Statement	BMX	Tuscaloosa	41 min
Jun 12, 5:51 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Tuscaloosa	39 min
Jun 12, 6:17 PM CDT	Special Weather Statement	BMX	Lamar	28 min
Jun 12, 6:28 PM CDT	Special Weather Statement	BMX	Greene, Hale, Pickens	47 min
Jun 12, 6:37 PM CDT	Special Weather Statement	BMX	Pickens	38 min
Jun 12, 6:39 PM CDT	Special Weather Statement	BMX	Chambers	36 min
Jun 12, 6:42 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	20 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2021 Every severe thunderstorm warning in 2021

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.