Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Birmingham, AL

March 28, 2021Calhoun County, St. Clair County, Talladega County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 28, 2021, 7:37 AM CDT for Calhoun County, St. Clair County, Talladega County, Alabama. It was in force for 38 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: Mar 28, 2021, 7:37 AM CDT (12:37 UTC)
Expired: Mar 28, 2021, 8:15 AM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calhoun County, AL, St. Clair County, AL, Talladega County, AL

The radar

The Birmingham radar (KBMX), 102 km from the middle of the area, began a volume at 12:38 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 28, 5:10 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 0.6 hours before the alert went out and 102 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: 757 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 355 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

As transmitted.

231 
WUUS54 KBMX 281237
SVRBMX
ALC015-115-121-281315-
/O.NEW.KBMX.SV.W.0035.210328T1237Z-210328T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
737 AM CDT Sun Mar 28 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northeastern Talladega County in east central Alabama...
  Southern Calhoun County in east central Alabama...
  Southeastern St. Clair County in central Alabama...

* Until 815 AM CDT.

* At 737 AM CDT, severe thunderstorms were located along a line
  extending from near Ragland to Coosa Island, moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Anniston, Oxford, Talladega, Pell City, Cobb Town, West End-Cobb
  Town, Fort McClellan, Saks, Lincoln, Weaver, Riverside, Ragland,
  Munford, Hobson City, Alpine Bay Resort, Talladega Superspeedway,
  Anniston Regional Airport, Blue Mountain, Talladega Municipal
  Airport and Grant Town.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 8564 3365 8564 3363 8566 3363 8569
      3361 8569 3361 8572 3360 8572 3360 8574
      3356 8575 3356 8579 3350 8585 3350 8590
      3346 8590 3345 8592 3342 8592 3341 8638
      3373 8626 3379 8562 3378 8562
TIME...MOT...LOC 1237Z 266DEG 48KT 3369 8620 3346 8631 

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

05

5 follow-up statements

719 
WWUS54 KBMX 281246
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
746 AM CDT Sun Mar 28 2021

ALC115-281256-
/O.CAN.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
St. Clair AL-
746 AM CDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ST. CLAIR COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
central and east central Alabama.

LAT...LON 3377 8564 3365 8564 3360 8574 3356 8575
      3356 8579 3350 8585 3350 8590 3342 8592
      3341 8634 3354 8619 3359 8622 3359 8618
      3361 8620 3362 8617 3371 8614 3371 8613
      3374 8610 3376 8599 3379 8562 3378 8562
TIME...MOT...LOC 1246Z 266DEG 48KT 3370 8609 3347 8620 

$$

ALC015-121-281315-
/O.CON.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
Talladega AL-Calhoun AL-
746 AM CDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT
FOR NORTHEASTERN TALLADEGA AND SOUTHERN CALHOUN COUNTIES...

At 746 AM CDT, severe thunderstorms were located along a line
extending from near Ragland to near Logan Martin Lake, moving east at
55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Anniston, Oxford, Talladega, Cobb Town, West End-Cobb Town, Fort
McClellan, Saks, Lincoln, Weaver, Munford, Hobson City, Alpine Bay
Resort, Talladega Superspeedway, Anniston Regional Airport, Blue
Mountain, Talladega Municipal Airport, Grant Town, Honda
Manufacturing Of Alabama, Oxford Lake and Bynum.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 8564 3365 8564 3360 8574 3356 8575
      3356 8579 3350 8585 3350 8590 3342 8592
      3341 8634 3354 8619 3359 8622 3359 8618
      3361 8620 3362 8617 3371 8614 3371 8613
      3374 8610 3376 8599 3379 8562 3378 8562
TIME...MOT...LOC 1246Z 266DEG 48KT 3370 8609 3347 8620 

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

05

851 
WWUS54 KBMX 281251
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
751 AM CDT Sun Mar 28 2021

ALC015-121-281315-
/O.CON.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
Talladega AL-Calhoun AL-
751 AM CDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT
FOR NORTHEASTERN TALLADEGA AND SOUTHERN CALHOUN COUNTIES...

At 751 AM CDT, severe thunderstorms were located along a line
extending from near Ohatchee to near Talladega, moving east at 55
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Anniston, Oxford, Talladega, Cobb Town, West End-Cobb Town, Fort
McClellan, Saks, Lincoln, Weaver, Munford, Hobson City, Talladega
Superspeedway, Anniston Regional Airport, Blue Mountain, Talladega
Municipal Airport, Grant Town, Honda Manufacturing Of Alabama, Oxford
Lake, Bynum and Alexandria.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 8564 3365 8564 3360 8574 3356 8575
      3356 8579 3350 8585 3350 8590 3343 8592
      3343 8622 3355 8616 3359 8618 3362 8614
      3363 8611 3376 8599 3379 8562 3378 8562
TIME...MOT...LOC 1251Z 266DEG 48KT 3370 8602 3347 8613 

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

05

294 
WWUS54 KBMX 281301
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
801 AM CDT Sun Mar 28 2021

ALC015-121-281315-
/O.CON.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
Talladega AL-Calhoun AL-
801 AM CDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT
FOR NORTHEASTERN TALLADEGA AND SOUTHEASTERN CALHOUN COUNTIES...

At 800 AM CDT, severe thunderstorms were located along a line
extending from near Cobb Town to near Munford, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Anniston, Oxford, Talladega, Cobb Town, West End-Cobb Town, Saks,
Munford, Hobson City, Grant Town, Anniston Regional Airport, Oxford
Lake, Blue Mountain, Bynum, Choccolocco, Dearmanville, Camp Mac and
Jenifer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3343 8610 3368 8592 3372 8564 3365 8564
      3360 8574 3356 8575 3356 8579 3350 8585
      3350 8590 3343 8592
TIME...MOT...LOC 1300Z 270DEG 32KT 3362 8589 3348 8599 

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

05

479 
WWUS54 KBMX 281306
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
806 AM CDT Sun Mar 28 2021

ALC015-121-281315-
/O.CON.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
Talladega AL-Calhoun AL-
806 AM CDT Sun Mar 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT
FOR EAST CENTRAL TALLADEGA AND SOUTHEASTERN CALHOUN COUNTIES...

At 806 AM CDT, severe thunderstorms were located along a line
extending from Oxford Lake to near Grant Town, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Anniston, Oxford, Munford, Oxford Lake, Dearmanville and Camp Mac. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3346 8604 3362 8580 3366 8572 3365 8564
      3360 8574 3356 8575 3356 8579 3350 8585
      3350 8590 3343 8592
TIME...MOT...LOC 1306Z 266DEG 48KT 3362 8581 3348 8591 

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

05

528 
WWUS54 KBMX 281309
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
809 AM CDT Sun Mar 28 2021

ALC015-121-281319-
/O.EXP.KBMX.SV.W.0035.000000T0000Z-210328T1315Z/
Talladega AL-Calhoun AL-
809 AM CDT Sun Mar 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TALLADEGA AND
SOUTHEASTERN CALHOUN COUNTIES WILL EXPIRE AT 815 AM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
east central Alabama.

LAT...LON 3346 8604 3362 8580 3366 8572 3365 8564
      3360 8574 3356 8575 3356 8579 3350 8585
      3350 8590 3343 8592
TIME...MOT...LOC 1309Z 266DEG 48KT 3362 8576 3348 8586 

$$

05

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 2:47 AM CDT	Severe Thunderstorm Warning	BMX	Marion	43 min
Mar 28, 3:25 AM CDT	Special Weather Statement	BMX	Winston	35 min
Mar 28, 3:47 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion	58 min
Mar 28, 4:15 AM CDT	Special Weather Statement	BMX	Winston	45 min
Mar 28, 4:32 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker, Winston	47 min
Mar 28, 5:17 AM CDT	Special Weather Statement	BMX	Walker	43 min
Mar 28, 5:46 AM CDT	Special Weather Statement	BMX	Marshall	29 min
Mar 28, 6:01 AM CDT	Special Weather Statement	BMX	Tuscaloosa, Walker	44 min
Mar 28, 6:13 AM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	62 min
Mar 28, 6:27 AM CDT	Special Weather Statement	BMX	Jefferson, Tuscaloosa	63 min
Mar 28, 6:34 AM CDT	Special Weather Statement	BMX	DeKalb	26 min
Mar 28, 6:46 AM CDT	Special Weather Statement	BMX	Blount, Etowah	59 min
Mar 28, 6:59 AM CDT	Special Weather Statement	BMX	St. Clair, Shelby	61 min
Mar 28, 7:13 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby	32 min
Mar 28, 7:19 AM CDT	Special Weather Statement	BMX	Cherokee	26 min
Mar 28, 7:41 AM CDT	Special Weather Statement	BMX	Bibb, Shelby	64 min
Mar 28, 7:45 AM CDT	Special Weather Statement	BMX	Cherokee	30 min
Mar 28, 7:50 AM CDT	Severe Thunderstorm Warning	BMX	Shelby	40 min
Mar 28, 8:05 AM CDT	Special Weather Statement	BMX	Clay, Talladega	55 min
Mar 28, 8:22 AM CDT	Special Weather Statement	BMX	Coosa	23 min
Mar 28, 8:23 AM CDT	Special Weather Statement	BMX	Perry	37 min
Mar 28, 8:38 AM CDT	Special Weather Statement	BMX	Randolph	37 min
Mar 28, 9:40 AM CDT	Special Weather Statement	BMX	Clay	35 min
Mar 28, 9:44 AM CDT	River Flood Warning	BMX	Cherokee, Etowah, St. Clair	8 days
Mar 28, 10:03 AM CDT	Special Weather Statement	BMX	Randolph	42 min
Mar 28, 10:33 AM CDT	Special Weather Statement	BMX	Chambers	42 min
Mar 28, 12:38 PM CDT	River Flood Warning	BMX	Sumter	57 hr

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.