Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Mar 17, 2021, 10:22 PM CDT for 4 counties in Alabama. It was in force for 68 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 17, 2021, 10:22 PM CDT (03:22 UTC)
- Expired
- Mar 17, 2021, 11:30 PM CDT
- In force
- 68 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Calhoun County, AL, Cherokee County, AL, Etowah County, AL, St. Clair County, AL
The radar
The Northeast Alabama radar (KHTX), 116 km from the middle of the area, began a volume at 03:22 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 17, 6:48 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 3.4 hours before the alert went out and 120 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.
- Mixed-layer CAPE
- 188 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 465 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
332
WUUS54 KBMX 180322
SVRBMX
ALC015-019-055-115-180430-
/O.NEW.KBMX.SV.W.0012.210318T0322Z-210318T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
1022 PM CDT Wed Mar 17 2021
The National Weather Service in Birmingham has issued a
* Severe Thunderstorm Warning for...
Calhoun County in east central Alabama...
Etowah County in northeastern Alabama...
Northeastern St. Clair County in central Alabama...
Cherokee County in northeastern Alabama...
* Until 1130 PM CDT.
* At 1022 PM CDT, severe thunderstorms were located along a line
extending from near Albertville to near Pell City, moving east at
50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Gadsden, Anniston, Oxford, Jacksonville, Rainbow City, Attalla,
Piedmont, Hokes Bluff, Springville, Odenville, Centre, Cedar Bluff,
Cobb Town, Fort McClellan, Saks, Little River Canyon National
Preserve, Forney, West End-Cobb Town, Centre Municipal Airport and
Glencoe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 300 AM CDT for central,
northeastern and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3397 8540 3396 8549 3389 8553 3388 8564
3380 8559 3377 8564 3363 8566 3356 8579
3359 8580 3359 8599 3367 8605 3370 8619
3361 8644 3384 8641 3410 8630 3418 8619
3420 8584 3424 8584 3437 8563 3453 8552
TIME...MOT...LOC 0322Z 249DEG 45KT 3421 8627 3353 8631
HAIL...<.75IN
WIND...60MPH
$$
87/GRANTHAM4 follow-up statements
126
WWUS54 KBMX 180343
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1043 PM CDT Wed Mar 17 2021
ALC015-019-055-115-180430-
/O.CON.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
Calhoun AL-Etowah AL-St. Clair AL-Cherokee AL-
1043 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR CALHOUN...ETOWAH...NORTHEASTERN ST. CLAIR AND CHEROKEE
COUNTIES...
At 1042 PM CDT, severe thunderstorms were located along a line
extending from near Crossville to near Talladega Municipal Airport,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gadsden, Anniston, Oxford, Jacksonville, Rainbow City, Attalla,
Piedmont, Hokes Bluff, Centre, Cedar Bluff, Little River Canyon
National Preserve, Forney, West End-Cobb Town, Centre Municipal
Airport, Cobb Town, Fort McClellan, Saks, Glencoe, Weaver and Sardis
City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 300 AM CDT for central,
northeastern and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3369 8616 3418 8616 3420 8584 3424 8584
3437 8563 3447 8556 3449 8551 3397 8540
3396 8549 3389 8553 3388 8564 3380 8559
3377 8564 3363 8566 3356 8579 3359 8580
3359 8599 3367 8605
TIME...MOT...LOC 0342Z 251DEG 43KT 3423 8604 3361 8605
HAIL...<.75IN
WIND...60MPH
$$
87/GRANTHAM926
WWUS54 KBMX 180352 RRA
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1052 PM CDT Wed Mar 17 2021
ALC115-180402-
/O.CAN.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
St. Clair AL-
1052 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN 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 Tornado Watch remains in effect until 300 AM CDT for northeastern
and east central Alabama.
LAT...LON 3359 8598 3418 8608 3420 8584 3424 8584
3437 8563 3447 8556 3449 8551 3397 8540
3396 8549 3389 8553 3388 8564 3380 8559
3377 8564 3363 8566 3356 8579 3359 8580
TIME...MOT...LOC 0352Z 235DEG 50KT 3421 8598 3361 8589
$$
ALC015-019-055-180430-
/O.CON.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
Calhoun AL-Etowah AL-Cherokee AL-
1052 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR CALHOUN...EASTERN ETOWAH AND CHEROKEE COUNTIES...
At 1052 PM CDT, severe thunderstorms were located along a line
extending from near Crossville to near Hobson City, moving northeast
at 60 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Gadsden, Anniston, Oxford, Jacksonville, Rainbow City, Piedmont,
Hokes Bluff, Centre, Cedar Bluff, Little River Canyon National
Preserve, Forney, West End-Cobb Town, Centre Municipal Airport, Cobb
Town, Fort McClellan, Saks, Glencoe, Weaver, Ohatchee and Leesburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 300 AM CDT for northeastern
and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3359 8598 3418 8608 3420 8584 3424 8584
3437 8563 3447 8556 3449 8551 3397 8540
3396 8549 3389 8553 3388 8564 3380 8559
3377 8564 3363 8566 3356 8579 3359 8580
TIME...MOT...LOC 0352Z 235DEG 50KT 3421 8598 3361 8589
HAIL...<.75IN
WIND...60MPH
$$
87/GRANTHAM781
WWUS54 KBMX 180406
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1106 PM CDT Wed Mar 17 2021
ALC015-019-055-180430-
/O.CON.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
Calhoun AL-Etowah AL-Cherokee AL-
1106 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR EASTERN CALHOUN...EAST CENTRAL ETOWAH AND CHEROKEE COUNTIES...
At 1106 PM CDT, severe thunderstorms were located along a line
extending from near Sand Rock to 6 miles west of Heflin, 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, Jacksonville, Piedmont, Centre, Cedar Bluff, Little
River Canyon National Preserve, Forney, Fort McClellan, Centre
Municipal Airport, Saks, Weaver, Leesburg, Hobson City, Sand Rock,
Gaylesville, Tennala, Pleasant Gap, Cornwall Furnace Park and
Blanche.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 300 AM CDT for northeastern
and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3359 8584 3426 8581 3437 8563 3444 8558
3446 8550 3397 8540 3396 8549 3389 8553
3388 8564 3380 8559 3377 8564 3363 8566
3356 8579 3359 8580
TIME...MOT...LOC 0406Z 251DEG 48KT 3430 8569 3362 8570
HAIL...<.75IN
WIND...60MPH
$$
87/GRANTHAM923
WWUS54 KBMX 180418
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1118 PM CDT Wed Mar 17 2021
ALC055-180428-
/O.CAN.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
Etowah AL-
1118 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ETOWAH COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 300 AM CDT for northeastern
and east central Alabama.
LAT...LON 3397 8540 3396 8548 3394 8550 3394 8553
3389 8553 3389 8560 3436 8565 3438 8562
3444 8558 3446 8550
TIME...MOT...LOC 0418Z 232DEG 52KT 3440 8555 3388 8554
$$
ALC015-019-180430-
/O.CON.KBMX.SV.W.0012.000000T0000Z-210318T0430Z/
Calhoun AL-Cherokee AL-
1118 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHEASTERN CALHOUN AND EASTERN CHEROKEE COUNTIES...
At 1118 PM CDT, severe thunderstorms were located along a line
extending from near Blanche to near Piedmont, moving northeast at 60
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Piedmont, Cedar Bluff, Little River Canyon National Preserve, Forney,
Gaylesville, Pleasant Gap, Cornwall Furnace Park, Blanche, Eastern
Weiss Lake, Moshat, Western Weiss Lake, Coloma, Fullerton, New Moon,
Spring Garden, Broomtown, Howells Crossroads, Waterhouse and
Chesterfield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 300 AM CDT for northeastern
and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3397 8540 3396 8548 3394 8550 3394 8553
3389 8553 3389 8560 3436 8565 3438 8562
3444 8558 3446 8550
TIME...MOT...LOC 0418Z 232DEG 52KT 3440 8555 3388 8554
HAIL...<.75IN
WIND...60MPH
$$
87/GRANTHAMThe office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 7:18 PM CDT | Tornado Warning | BMX | Autauga, Dallas | 17 min |
| Mar 17, 7:47 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Lamar, Marion | 58 min |
| Mar 17, 8:01 PM CDT | Tornado Warning | BMX | Greene, Pickens, Sumter | 22 min |
| Mar 17, 8:15 PM CDT | Severe Thunderstorm Warning | BMX | Autauga | 39 min |
| Mar 17, 8:32 PM CDT | Tornado Warning | BMX | Autauga, Chilton, Elmore | 19 min |
| Mar 17, 9:06 PM CDT | River Flood Warning | BMX | Greene, Hale, Marengo, Tuscaloosa | 33 hr |
| Mar 17, 9:14 PM CDT | River Flood Warning | BMX | Sumter | 37 hr |
| Mar 17, 9:18 PM CDT | River Flood Warning | BMX | Greene, Hale, Marengo, Sumter | 72 hr |
| Mar 17, 9:48 PM CDT | Areal Flood Advisory | BMX | Blount | 3 hr |
| Mar 17, 9:51 PM CDT | Severe Thunderstorm Warning | BMX | Autauga, Chilton, Coosa, Elmore, Lowndes, Montgomery | 69 min |
| Mar 17, 10:06 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair, Shelby, Talladega | 69 min |
| Mar 17, 10:26 PM CDT | Areal Flood Advisory | BMX | Calhoun, Cherokee, Cleburne, Etowah, St. Clair, Talladega | 3 hr |
| Mar 17, 10:30 PM CDT | Severe Thunderstorm Warning | BMX | Bullock, Lee, Macon, Tallapoosa | 75 min |
| Mar 17, 10:43 PM CDT | Tornado Warning | BMX | Coosa | 6 min |
| Mar 17, 11:34 PM CDT | Special Weather Statement | BMX | Lee, Russell | 41 min |
| Mar 18, 2:46 AM CDT | Special Weather Statement | BMX | Russell | 44 min |
| Mar 18, 3:06 AM CDT | Wind Advisory | BMX | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more | 16 hr |
| Mar 18, 8:31 AM CDT | Areal Flood Warning | BMX | Cherokee | 55 hr |
| Mar 18, 9:50 AM CDT | River Flood Warning | BMX | Jefferson, Tuscaloosa, Walker | 36 hr |
Nearby
Severe Thunderstorm Warnings in Alabama, 2021Every 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.