Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Birmingham, AL

March 25, 2021Blount County, Etowah County, St. Clair County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 25, 2021, 8:51 PM CDT for Blount County, Etowah County, St. Clair County, Alabama. It was in force for 25 min. 1 report 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, 8:51 PM CDT (01:51 UTC)
Expired
Mar 25, 2021, 9:16 PM CDT
In force
25 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Blount County, AL, Etowah County, AL, St. Clair County, AL

The radar

The Northeast Alabama radar (KHTX), 92 km from the middle of the area, began a volume at 01:54 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, 9:03 PM CDTHAIL 12 Nw Howelton, ALDIME TO QUARTER SIZE HAIL REPORTED VIA SOCIAL MEDIA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 25, 7:47 PM CDTTornado WatchSPC3 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.9 hours before the alert went out and 122 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 00:00Z on 2021-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1313 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2021-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 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
1313 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
3.1
Supercell composite
13.2

Open this sounding in Storm Lab

The text

As transmitted.

706 
WUUS54 KBMX 260151
SVRBMX
ALC009-055-115-260230-
/O.NEW.KBMX.SV.W.0023.210326T0151Z-210326T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
851 PM CDT Thu Mar 25 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  East central Blount County in central Alabama...
  Etowah County in northeastern Alabama...
  North central St. Clair County in central Alabama...

* Until 930 PM CDT.

* At 851 PM CDT, severe thunderstorms were located along a line
  extending from near Oneonta to Steele, moving northeast at 75 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...
  Gadsden, Rainbow City, Oneonta, Attalla, Ashville, Sardis City,
  Steele, Altoona, Walnut Grove, Reece City, Rosa, Tabor Road,
  Aurora, Noccalula Falls, Gadsden Mall, Highland Lake, Whitney
  Junction, Alabama International Dragway, Mountainboro and
  Rockledge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central
Alabama.

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

&&

LAT...LON 3411 8584 3413 8580 3412 8579 3410 8580
      3383 8635 3396 8652 3412 8633 3410 8630
      3418 8619 3419 8611 3420 8610 3420 8584
TIME...MOT...LOC 0151Z 231DEG 77KT 3392 8644 3396 8619 

HAIL...1.00IN
WIND...60MPH
 
$$

32/Davis
3 follow-up statements
515 
WWUS54 KBMX 260201
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
901 PM CDT Thu Mar 25 2021

ALC009-115-260210-
/O.CAN.KBMX.SV.W.0023.000000T0000Z-210326T0230Z/
Blount AL-St. Clair AL-
901 PM CDT Thu Mar 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BLOUNT AND NORTH
CENTRAL ST. CLAIR COUNTIES 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 100 AM CDT for central
Alabama.

LAT...LON 3411 8584 3413 8580 3412 8579 3410 8580
      3399 8611 3399 8622 3397 8625 3399 8628
      3397 8630 3398 8634 3405 8633 3410 8630
      3418 8619 3419 8611 3420 8610 3420 8584
TIME...MOT...LOC 0200Z 231DEG 77KT 3404 8627 3408 8602 

$$

ALC055-260230-
/O.CON.KBMX.SV.W.0023.000000T0000Z-210326T0230Z/
Etowah AL-
901 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR NORTHERN ETOWAH COUNTY...

At 900 PM CDT, severe thunderstorms were located along a line
extending from near Walnut Grove to Reece City, moving northeast at
90 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Gadsden, Attalla, Sardis City, Altoona, Walnut Grove, Reece City,
Tabor Road, Aurora, Noccalula Falls, Howelton, Crudup, Mountainboro,
Gallant, Keener, Rockledge, Black Creek, Wilsonia and Ramsey.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 AM CDT for central
Alabama.

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

&&

LAT...LON 3411 8584 3413 8580 3412 8579 3410 8580
      3399 8611 3399 8622 3397 8625 3399 8628
      3397 8630 3398 8634 3405 8633 3410 8630
      3418 8619 3419 8611 3420 8610 3420 8584
TIME...MOT...LOC 0200Z 231DEG 77KT 3404 8627 3408 8602 

HAIL...1.75IN
WIND...60MPH
 
$$

32/Davis
467 
WWUS54 KBMX 260211
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
911 PM CDT Thu Mar 25 2021

ALC055-260230-
/O.CON.KBMX.SV.W.0023.000000T0000Z-210326T0230Z/
Etowah AL-
911 PM CDT Thu Mar 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR NORTHEASTERN ETOWAH COUNTY...

At 910 PM CDT, a severe thunderstorm was located near Sardis City, or
8 miles east of Boaz, moving northeast at 95 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...
Sardis City, Tabor Road, Mountainboro, Keener and Black Creek. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3412 8585 3411 8608 3411 8617 3418 8619
      3419 8611 3420 8610 3420 8584
TIME...MOT...LOC 0210Z 234DEG 82KT 3419 8601 

HAIL...1.00IN
WIND...60MPH
 
$$

32/Davis
979 
WWUS54 KBMX 260216
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
916 PM CDT Thu Mar 25 2021

ALC055-260226-
/O.CAN.KBMX.SV.W.0023.000000T0000Z-210326T0230Z/
Etowah AL-
916 PM CDT Thu Mar 25 2021

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

LAT...LON 3412 8585 3411 8608 3411 8617 3418 8619
      3419 8611 3420 8610 3420 8584
TIME...MOT...LOC 0214Z 231DEG 77KT 3428 8587 

$$

32/Davis

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 25, 7:04 PM CDTSpecial Weather StatementBMXCalhoun26 min
Mar 25, 7:07 PM CDTTornado WarningBMXMarengo24 min
Mar 25, 7:10 PM CDTSpecial Weather StatementBMXHale50 min
Mar 25, 7:16 PM CDTSevere Thunderstorm WarningBMXGreene, Hale32 min
Mar 25, 7:17 PM CDTAreal Flood AdvisoryBMXCalhoun, Cherokee, Cleburne14 min
Mar 25, 7:31 PM CDTFlash Flood WarningBMXCalhoun, Cherokee, Cleburne3 hr
Mar 25, 7:34 PM CDTSevere Thunderstorm WarningBMXBibb, Tuscaloosa23 min
Mar 25, 7:48 PM CDTSpecial Weather StatementBMXJefferson27 min
Mar 25, 8:28 PM CDTSevere Thunderstorm WarningBMXBlount, Jefferson, St. Clair28 min
Mar 25, 8:33 PM CDTSevere Thunderstorm WarningBMXChilton42 min
Mar 25, 8:58 PM CDTSevere Thunderstorm WarningBMXCoosa49 min
Mar 25, 9:01 PM CDTRiver Flood WarningBMXBibb, Jefferson, Shelby24 hr
Mar 25, 9:04 PM CDTTornado WarningBMXChilton, Coosa32 min
Mar 25, 9:21 PM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker12 hr
Mar 25, 9:23 PM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker60 hr
Mar 25, 9:41 PM CDTRiver Flood WarningBMXGreene, Hale, Tuscaloosa24 hr
Mar 25, 9:44 PM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Tuscaloosa60 hr
Mar 25, 9:47 PM CDTRiver Flood WarningBMXSumter12 hr
Mar 25, 9:49 PM CDTRiver Flood WarningBMXGreene, Pickens, Sumter5 days
Mar 25, 9:51 PM CDTTornado WarningBMXChambers, Clay, Randolph, Tallapoosa54 min
Mar 25, 11:20 PM CDTAreal Flood WarningBMXBlount, Jefferson, St. Clair6 hr
Mar 25, 11:55 PM CDTRiver Flood WarningBMXCalhoun, Cherokee, Etowah, St. Clair58 hr
Mar 26, 5:26 AM CDTRiver Flood WarningBMXChilton, Coosa, Elmore, Shelby, Talladega4 days
Mar 26, 5:32 AM CDTAreal Flood WarningBMXCherokee6 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.