Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 16, NWS Birmingham, AL

March 25, 20214 counties in Alabama

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

TimeReportWhereRemark
Mar 25, 11:48 AM CDTHAIL 11 Sse Gardendale, ALSOCIAL MEDIA VIDEO OF HAIL AT LEAST QUARTER SIZE NEAR GARDENDALE.
Mar 25, 11:48 AM CDTHAIL 1.751 Sse Gardendale, ALCORRECTS PREVIOUS HAIL REPORT FROM 1 SSE GARDENDALE. SOCIAL MEDIA PICTURE OF HAIL AT LEAST GOLF BALL SIZE NEAR GARDENDALE.
Mar 25, 11:58 AM CDTHAIL 11 Wnw Chalkville, ALSOCIAL 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2021-03-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2021-03-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 613 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
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

Open this sounding in Storm Lab

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/KLAWS
2 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/KLAWS
623 
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/KLAWS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 24, 10:58 PM CDTWind AdvisoryBMXAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more24 hr
Mar 25, 1:43 AM CDTSpecial Weather StatementBMXPike47 min
Mar 25, 4:54 AM CDTSpecial Weather StatementBMXLee36 min
Mar 25, 7:45 AM CDTSpecial Weather StatementBMXMarengo45 min
Mar 25, 7:48 AM CDTSpecial Weather StatementBMXTuscaloosa42 min
Mar 25, 8:46 AM CDTSpecial Weather StatementBMXJefferson, Tuscaloosa44 min
Mar 25, 8:53 AM CDTSpecial Weather StatementBMXMarshall22 min
Mar 25, 9:19 AM CDTSpecial Weather StatementBMXBlount41 min
Mar 25, 9:24 AM CDTAreal Flood AdvisoryBMXFayette, Walker, Winston3 hr
Mar 25, 9:28 AM CDTSpecial Weather StatementBMXJefferson47 min
Mar 25, 9:58 AM CDTSevere Thunderstorm WarningBMXJefferson, St. Clair32 min
Mar 25, 10:12 AM CDTAreal Flood AdvisoryBMXBlount, Jefferson3 hr
Mar 25, 10:18 AM CDTSevere Thunderstorm WarningBMXSt. Clair13 min
Mar 25, 10:28 AM CDTSpecial Weather StatementBMXCalhoun, Etowah, St. Clair47 min
Mar 25, 10:53 AM CDTSpecial Weather StatementBMXJefferson, Tuscaloosa, Walker37 min
Mar 25, 11:19 AM CDTSevere Thunderstorm WarningBMXCalhoun, Cherokee, Cleburne15 min
Mar 25, 11:36 AM CDTTornado WarningBMXGreene, Hale54 min
Mar 25, 12:03 PM CDTSevere Thunderstorm WarningBMXBlount, Calhoun, Etowah, Jefferson, St. Clair, Talladega72 min
Mar 25, 12:11 PM CDTTornado WarningBMXBibb, Tuscaloosa64 min
Mar 25, 12:45 PM CDTSpecial Weather StatementBMXCherokee60 min
Mar 25, 12:47 PM CDTFlash Flood WarningBMXCherokee, Etowah6 hr
Mar 25, 12:53 PM CDTTornado Warning EmergencyBMXJefferson, Shelby67 min
Mar 25, 12:54 PM CDTAreal Flood AdvisoryBMXJefferson, St. Clair4 hr
Mar 25, 1:28 PM CDTTornado WarningBMXPickens43 min
Mar 25, 1:46 PM CDTTornado Warning Tornado observedConsiderable damage threatBMXSt. Clair, Shelby, Talladega59 min
Mar 25, 1:57 PM CDTFlash Flood WarningBMXBlount, Jefferson, St. Clair9 hr
Mar 25, 2:23 PM CDTTornado Warning Tornado observedBMXCalhoun67 min
Mar 25, 2:32 PM CDTFlash Flood WarningBMXFayette, Jefferson, Lamar, Marion, Pickens, Tuscaloosa and 2 more4 hr
Mar 25, 2:45 PM CDTTornado WarningBMXFayette, Tuscaloosa, Walker15 min
Mar 25, 2:58 PM CDTTornado Warning Tornado observedBMXCherokee, Etowah45 min
Mar 25, 3:11 PM CDTTornado WarningBMXSumter37 min
Mar 25, 3:35 PM CDTTornado WarningBMXGreene55 min
Mar 25, 3:37 PM CDTTornado WarningBMXSumter53 min
Mar 25, 3:44 PM CDTTornado WarningBMXBlount, Jefferson25 min
Mar 25, 3:59 PM CDTTornado Warning EmergencyBMXGreene, Hale61 min
Mar 25, 4:10 PM CDTTornado Warning Tornado observedBMXHale, Tuscaloosa10 min
Mar 25, 4:27 PM CDTSpecial Weather StatementBMXJefferson33 min
Mar 25, 4:33 PM CDTTornado Warning EmergencyTornado observedConsiderable damage threatBMXBibb, Perry57 min
Mar 25, 4:45 PM CDTTornado WarningBMXJefferson18 min
Mar 25, 4:48 PM CDTSpecial Weather StatementBMXWalker27 min
Mar 25, 4:55 PM CDTTornado Warning Tornado observedBMXSt. Clair41 min
Mar 25, 5:05 PM CDTTornado Warning EmergencyTornado observedConsiderable damage threatBMXChilton, Shelby55 min
Mar 25, 5:16 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatBMXBibb29 min
Mar 25, 5:24 PM CDTTornado WarningBMXCalhoun, Etowah28 min
Mar 25, 5:29 PM CDTAreal Flood AdvisoryBMXChilton, Coosa, Shelby, Talladega21 min
Mar 25, 5:50 PM CDTFlash Flood WarningBMXChilton, Coosa, Shelby, Talladega100 min
Mar 25, 5:50 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatBMXShelby, Talladega23 min
Mar 25, 6:03 PM CDTSpecial Weather StatementBMXGreene27 min
Mar 25, 6:15 PM CDTSpecial Weather StatementBMXFayette30 min
Mar 25, 6:30 PM CDTAreal Flood WarningBMXCherokee3 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.