Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 121, NWS Birmingham, AL

June 12, 2021Greene County, Hale County, Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 12, 2021, 5:51 PM CDT for Greene County, Hale County, Tuscaloosa County, Alabama. It was in force for 39 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, 5:51 PM CDT (22:51 UTC)
Expired: Jun 12, 2021, 6:30 PM CDT
In force: 39 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Greene County, AL, Hale County, AL, Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 97 km from the middle of the area, began a volume at 22:52 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, 6:00 PM CDT	TSTM WND DMG	Knoxville, AL	SEVERAL TREES DOWN IN THE KNOXVILLE AREA. 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, 10.9 hours before the alert went out and 97 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.

565 
WUUS54 KBMX 122251
SVRBMX
ALC063-065-125-122330-
/O.NEW.KBMX.SV.W.0121.210612T2251Z-210612T2330Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southwestern Tuscaloosa County in west central Alabama...
  Northeastern Greene County in west central Alabama...
  Northwestern Hale County in west central Alabama...

* Until 630 PM CDT.

* At 551 PM CDT, a severe thunderstorm was located over Knoxville, or
  13 miles northeast of Eutaw, moving southwest at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Eutaw, Moundville, Akron, Knoxville, Wedgeworth, Evansville, Mound
  State Park, Ralph, Elliots Creek, I 20 Rest Area Near Eutaw,
  Moundville Airport and Eutaw Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3310 8780 3302 8761 3276 8772 3284 8800
TIME...MOT...LOC 2251Z 025DEG 17KT 3300 8775 

HAIL...0.75IN
WIND...60MPH
 
$$

25/Owen

1 follow-up statement

826 
WWUS54 KBMX 122320
SVSBMX

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

ALC063-065-125-122330-
/O.EXP.KBMX.SV.W.0121.000000T0000Z-210612T2330Z/
Tuscaloosa AL-Greene AL-Hale AL-
620 PM CDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN TUSCALOOSA...
NORTHEASTERN GREENE AND NORTHWESTERN HALE COUNTIES WILL EXPIRE AT 630
PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3310 8780 3302 8761 3276 8772 3284 8800
TIME...MOT...LOC 2320Z 025DEG 17KT 3289 8781 

$$

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, 2:31 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Dallas	44 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, 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.