Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 117, NWS Birmingham, AL

June 12, 2021Chilton County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 12, 2021, 2:11 PM CDT for Chilton County, Alabama. It was in force for 17 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: Jun 12, 2021, 2:11 PM CDT (19:11 UTC)
Expired: Jun 12, 2021, 2:28 PM CDT
In force: 17 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Chilton County, AL

The radar

The Birmingham radar (KBMX), 49 km from the middle of the area, began a volume at 19:13 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, 7.2 hours before the alert went out and 50 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.

193 
WUUS54 KBMX 121911
SVRBMX
ALC021-122000-
/O.NEW.KBMX.SV.W.0117.210612T1911Z-210612T2000Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southwestern Chilton County in central Alabama...

* Until 300 PM CDT.

* At 210 PM CDT, a severe thunderstorm was located over Parnell, or
  15 miles north of Valley Grande, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Maplesville, Plecher, Parnell, Pooles Crossroads and Stanton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3266 8695 3272 8702 3274 8702 3284 8692
      3284 8688 3285 8688 3273 8668 3266 8678
TIME...MOT...LOC 1910Z 309DEG 12KT 3274 8692 

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

25/Owen

1 follow-up statement

541 
WWUS54 KBMX 121928
SVSBMX

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

ALC021-121937-
/O.CAN.KBMX.SV.W.0117.000000T0000Z-210612T2000Z/
Chilton AL-
228 PM CDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHILTON COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 3266 8695 3272 8702 3274 8702 3284 8692
      3284 8688 3285 8688 3273 8668 3266 8678
TIME...MOT...LOC 1924Z 309DEG 12KT 3270 8687 

$$

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, 2:20 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.