Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Mar 25, 2021, 11:14 AM CDT for 4 counties in Alabama. It was in force for 61 min. 3 reports 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
- Mar 25, 2021, 11:14 AM CDT (16:14 UTC)
- Expired
- Mar 25, 2021, 12:15 PM CDT
- In force
- 61 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Blount County, AL, Jefferson County, AL, St. Clair County, AL, Walker County, AL
The radar
The Birmingham radar (KBMX), 81 km from the middle of the area, began a volume at 16:18 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 |
|---|---|---|---|
| Mar 25, 11:48 AM CDT | HAIL 1 | 1 Sse Gardendale, AL | SOCIAL MEDIA VIDEO OF HAIL AT LEAST QUARTER SIZE NEAR GARDENDALE. |
| Mar 25, 11:48 AM CDT | HAIL 1.75 | 1 Sse Gardendale, AL | CORRECTS PREVIOUS HAIL REPORT FROM 1 SSE GARDENDALE. SOCIAL MEDIA PICTURE OF HAIL AT LEAST GOLF BALL SIZE NEAR GARDENDALE. |
| Mar 25, 11:58 AM CDT | HAIL 1 | 1 Wnw Chalkville, AL | SOCIAL MEDIA PHOTOS OF QUARTER SIZE HAIL NEAR PINSON. |
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, 4.2 hours before the alert went out and 81 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
- 54 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 507 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 613 m²/s²
- 0-3 km storm-relative helicity
- 713 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
The text
As transmitted.
907
WUUS54 KBMX 251614
SVRBMX
ALC009-073-115-127-251715-
/O.NEW.KBMX.SV.W.0016.210325T1614Z-210325T1715Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
1114 AM CDT Thu Mar 25 2021
The National Weather Service in Birmingham has issued a
* Severe Thunderstorm Warning for...
East central Walker County in central Alabama...
Southern Blount County in central Alabama...
Northeastern Jefferson County in central Alabama...
St. Clair County in central Alabama...
* Until 1215 PM CDT.
* At 1113 AM CDT, a severe thunderstorm was located over Graysville,
or near Dora, moving east at 60 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Northern Birmingham, Trussville, Gardendale, Leeds, Moody, Rainbow
City, Fultondale, Oneonta, Springville, Odenville, Sumiton, Dora,
Dallas, Center Point, Clay, Pinson, Tarrant, Adamsville, Margaret
and Argo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3399 8633 3394 8637 3394 8633 3398 8629
3397 8625 3399 8620 3390 8614 3386 8610
3385 8605 3381 8607 3377 8605 3371 8614
3367 8615 3370 8618 3369 8620 3362 8617
3352 8713 3370 8714 3381 8711 3383 8707
TIME...MOT...LOC 1613Z 257DEG 52KT 3366 8700
HAIL...1.00IN
WIND...60MPH
$$
17/KLAWS2 follow-up statements
549
WWUS54 KBMX 251625
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1125 AM CDT Thu Mar 25 2021
ALC127-251634-
/O.CAN.KBMX.SV.W.0016.000000T0000Z-210325T1715Z/
Walker AL-
1125 AM CDT Thu Mar 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WALKER COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 800 PM CDT for central,
northeastern and east central Alabama.
LAT...LON 3399 8633 3394 8637 3394 8633 3398 8629
3397 8625 3399 8620 3390 8614 3386 8610
3385 8605 3381 8607 3377 8605 3371 8614
3367 8615 3370 8618 3369 8620 3362 8617
3355 8695 3366 8701 3375 8697 3382 8695
TIME...MOT...LOC 1624Z 257DEG 52KT 3370 8680
$$
ALC009-073-115-251715-
/O.CON.KBMX.SV.W.0016.000000T0000Z-210325T1715Z/
Blount AL-Jefferson AL-St. Clair AL-
1125 AM CDT Thu Mar 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHERN BLOUNT...NORTHEASTERN JEFFERSON AND ST. CLAIR
COUNTIES...
At 1124 AM CDT, a severe thunderstorm was located over Gardendale,
moving east at 60 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Northern Birmingham, Trussville, Gardendale, Leeds, Moody, Rainbow
City, Fultondale, Oneonta, Springville, Odenville, Dallas, Center
Point, Clay, Pinson, Tarrant, Adamsville, Margaret, Argo, Warrior and
Kimberly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 800 PM 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 3399 8633 3394 8637 3394 8633 3398 8629
3397 8625 3399 8620 3390 8614 3386 8610
3385 8605 3381 8607 3377 8605 3371 8614
3367 8615 3370 8618 3369 8620 3362 8617
3355 8695 3366 8701 3375 8697 3382 8695
TIME...MOT...LOC 1624Z 257DEG 52KT 3370 8680
HAIL...1.00IN
WIND...60MPH
$$
17/KLAWS623
WWUS54 KBMX 251654
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
1154 AM CDT Thu Mar 25 2021
ALC009-073-115-251715-
/O.CON.KBMX.SV.W.0016.000000T0000Z-210325T1715Z/
Blount AL-Jefferson AL-St. Clair AL-
1154 AM CDT Thu Mar 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTHEASTERN BLOUNT...NORTHEASTERN JEFFERSON AND ST. CLAIR
COUNTIES...
At 1154 AM CDT, a severe thunderstorm was located over Clay, or 7
miles north of Trussville, moving east at 55 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Northern Birmingham, Trussville, Gardendale, Leeds, Moody, Rainbow
City, Fultondale, Oneonta, Springville, Odenville, Dallas, Center
Point, Clay, Pinson, Tarrant, Margaret, Argo, Kimberly, Ashville and
Riverside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 800 PM CDT for central,
northeastern and east central Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3399 8633 3394 8637 3394 8633 3398 8629
3397 8625 3399 8620 3390 8614 3386 8610
3385 8605 3381 8607 3377 8605 3371 8614
3367 8615 3370 8618 3369 8620 3362 8617
3356 8684 3365 8685 3375 8682 3389 8668
TIME...MOT...LOC 1654Z 248DEG 50KT 3373 8662
HAIL...1.25IN
WIND...60MPH
$$
17/KLAWSThe office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 10:58 PM CDT | Wind Advisory | BMX | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more | 24 hr |
| Mar 25, 1:43 AM CDT | Special Weather Statement | BMX | Pike | 47 min |
| Mar 25, 4:54 AM CDT | Special Weather Statement | BMX | Lee | 36 min |
| Mar 25, 7:45 AM CDT | Special Weather Statement | BMX | Marengo | 45 min |
| Mar 25, 7:48 AM CDT | Special Weather Statement | BMX | Tuscaloosa | 42 min |
| Mar 25, 8:46 AM CDT | Special Weather Statement | BMX | Jefferson, Tuscaloosa | 44 min |
| Mar 25, 8:53 AM CDT | Special Weather Statement | BMX | Marshall | 22 min |
| Mar 25, 9:19 AM CDT | Special Weather Statement | BMX | Blount | 41 min |
| Mar 25, 9:24 AM CDT | Areal Flood Advisory | BMX | Fayette, Walker, Winston | 3 hr |
| Mar 25, 9:28 AM CDT | Special Weather Statement | BMX | Jefferson | 47 min |
| Mar 25, 9:58 AM CDT | Severe Thunderstorm Warning | BMX | Jefferson, St. Clair | 32 min |
| Mar 25, 10:12 AM CDT | Areal Flood Advisory | BMX | Blount, Jefferson | 3 hr |
| Mar 25, 10:18 AM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 13 min |
| Mar 25, 10:28 AM CDT | Special Weather Statement | BMX | Calhoun, Etowah, St. Clair | 47 min |
| Mar 25, 10:53 AM CDT | Special Weather Statement | BMX | Jefferson, Tuscaloosa, Walker | 37 min |
| Mar 25, 11:19 AM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Cherokee, Cleburne | 15 min |
| Mar 25, 11:36 AM CDT | Tornado Warning | BMX | Greene, Hale | 54 min |
| Mar 25, 12:03 PM CDT | Severe Thunderstorm Warning | BMX | Blount, Calhoun, Etowah, Jefferson, St. Clair, Talladega | 72 min |
| Mar 25, 12:11 PM CDT | Tornado Warning | BMX | Bibb, Tuscaloosa | 64 min |
| Mar 25, 12:45 PM CDT | Special Weather Statement | BMX | Cherokee | 60 min |
| Mar 25, 12:47 PM CDT | Flash Flood Warning | BMX | Cherokee, Etowah | 6 hr |
| Mar 25, 12:53 PM CDT | Tornado Warning | BMX | Jefferson, Shelby | 67 min |
| Mar 25, 12:54 PM CDT | Areal Flood Advisory | BMX | Jefferson, St. Clair | 4 hr |
| Mar 25, 1:28 PM CDT | Tornado Warning | BMX | Pickens | 43 min |
| Mar 25, 1:46 PM CDT | Tornado Warning | BMX | St. Clair, Shelby, Talladega | 59 min |
| Mar 25, 1:57 PM CDT | Flash Flood Warning | BMX | Blount, Jefferson, St. Clair | 9 hr |
| Mar 25, 2:23 PM CDT | Tornado Warning | BMX | Calhoun | 67 min |
| Mar 25, 2:32 PM CDT | Flash Flood Warning | BMX | Fayette, Jefferson, Lamar, Marion, Pickens, Tuscaloosa and 2 more | 4 hr |
| Mar 25, 2:45 PM CDT | Tornado Warning | BMX | Fayette, Tuscaloosa, Walker | 15 min |
| Mar 25, 2:58 PM CDT | Tornado Warning | BMX | Cherokee, Etowah | 45 min |
| Mar 25, 3:11 PM CDT | Tornado Warning | BMX | Sumter | 37 min |
| Mar 25, 3:35 PM CDT | Tornado Warning | BMX | Greene | 55 min |
| Mar 25, 3:37 PM CDT | Tornado Warning | BMX | Sumter | 53 min |
| Mar 25, 3:44 PM CDT | Tornado Warning | BMX | Blount, Jefferson | 25 min |
| Mar 25, 3:59 PM CDT | Tornado Warning | BMX | Greene, Hale | 61 min |
| Mar 25, 4:10 PM CDT | Tornado Warning | BMX | Hale, Tuscaloosa | 10 min |
| Mar 25, 4:27 PM CDT | Special Weather Statement | BMX | Jefferson | 33 min |
| Mar 25, 4:33 PM CDT | Tornado Warning | BMX | Bibb, Perry | 57 min |
| Mar 25, 4:45 PM CDT | Tornado Warning | BMX | Jefferson | 18 min |
| Mar 25, 4:48 PM CDT | Special Weather Statement | BMX | Walker | 27 min |
| Mar 25, 4:55 PM CDT | Tornado Warning | BMX | St. Clair | 41 min |
| Mar 25, 5:05 PM CDT | Tornado Warning | BMX | Chilton, Shelby | 55 min |
| Mar 25, 5:16 PM CDT | Tornado Warning | BMX | Bibb | 29 min |
| Mar 25, 5:24 PM CDT | Tornado Warning | BMX | Calhoun, Etowah | 28 min |
| Mar 25, 5:29 PM CDT | Areal Flood Advisory | BMX | Chilton, Coosa, Shelby, Talladega | 21 min |
| Mar 25, 5:50 PM CDT | Flash Flood Warning | BMX | Chilton, Coosa, Shelby, Talladega | 100 min |
| Mar 25, 5:50 PM CDT | Tornado Warning | BMX | Shelby, Talladega | 23 min |
| Mar 25, 6:03 PM CDT | Special Weather Statement | BMX | Greene | 27 min |
| Mar 25, 6:15 PM CDT | Special Weather Statement | BMX | Fayette | 30 min |
| Mar 25, 6:30 PM CDT | Areal Flood Warning | BMX | Cherokee | 3 days |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.