Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 43, NWS Birmingham, AL

April 9, 20214 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 9, 2021, 9:56 AM CDT for 4 counties in Alabama. It was in force for 25 min. 2 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: Apr 9, 2021, 9:56 AM CDT (14:56 UTC)
Expired: Apr 9, 2021, 10:21 AM CDT
In force: 25 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Autauga County, AL, Chilton County, AL, Coosa County, AL, Elmore County, AL

The radar

The Maxwell AFB radar (KMXX), 58 km from the middle of the area, began a volume at 14:55 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
Apr 9, 10:01 AM CDT	HAIL 1.5	4 Ese Marbury, AL	FORWARDED BY BROADCAST MEDIA VIA SOCIAL MEDIA.
Apr 9, 10:07 AM CDT	HAIL 1	4 W Titus, AL	SOCIAL MEDIA REPORT OF HAIL UP TO QUARTER SIZE IN THE LIGHTWOOD COMMUNITY.

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, 2.9 hours before the alert went out and 65 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: 89 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 1321 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

624 
WUUS54 KBMX 091456
SVRBMX
ALC001-021-037-051-091545-
/O.NEW.KBMX.SV.W.0043.210409T1456Z-210409T1545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
956 AM CDT Fri Apr 9 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northeastern Autauga County in central Alabama...
  Northwestern Elmore County in east central Alabama...
  Southeastern Chilton County in central Alabama...
  Southwestern Coosa County in east central Alabama...

* Until 1045 AM CDT.

* At 956 AM CDT, a severe thunderstorm was located near Marbury, or
  13 miles north of Millbrook, moving northeast at 25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Speed, Marbury, Pentonville, Welona, Titus, Weoka Mills and Jordan
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3261 8640 3265 8652 3289 8640 3280 8612
TIME...MOT...LOC 1456Z 217DEG 20KT 3267 8643 

HAIL...1.00IN
WIND...<50MPH
 
$$

40/Sizemore

3 follow-up statements

593 
WWUS54 KBMX 091501
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1001 AM CDT Fri Apr 9 2021

ALC001-021-037-051-091545-
/O.CON.KBMX.SV.W.0043.000000T0000Z-210409T1545Z/
Autauga AL-Elmore AL-Chilton AL-Coosa AL-
1001 AM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR NORTHEASTERN AUTAUGA...NORTHWESTERN ELMORE...SOUTHEASTERN CHILTON
AND SOUTHWESTERN COOSA COUNTIES...

At 1000 AM CDT, a severe thunderstorm was located near Marbury, or 14
miles north of Millbrook, moving northeast at 25 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Speed, Marbury, Pentonville, Welona, Titus, Weoka Mills and Jordan
Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3262 8639 3267 8651 3289 8640 3280 8612
TIME...MOT...LOC 1500Z 217DEG 20KT 3269 8641 

HAIL...1.50IN
WIND...<50MPH
 
$$

40/Sizemore

426 
WWUS54 KBMX 091509
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1009 AM CDT Fri Apr 9 2021

ALC001-021-091518-
/O.CAN.KBMX.SV.W.0043.000000T0000Z-210409T1545Z/
Autauga AL-Chilton AL-
1009 AM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN AUTAUGA AND
SOUTHEASTERN CHILTON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3267 8641 3272 8642 3275 8641 3275 8638
      3277 8640 3288 8636 3280 8612 3265 8636
TIME...MOT...LOC 1508Z 219DEG 20KT 3273 8636 

$$

ALC037-051-091545-
/O.CON.KBMX.SV.W.0043.000000T0000Z-210409T1545Z/
Elmore AL-Coosa AL-
1009 AM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR NORTHWESTERN ELMORE AND SOUTH CENTRAL COOSA COUNTIES...

At 1008 AM CDT, a severe thunderstorm was located over Titus, or 14
miles southwest of Rockford, moving northeast at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Speed, Pentonville, Welona, Titus and Jordan Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3267 8641 3272 8642 3275 8641 3275 8638
      3277 8640 3288 8636 3280 8612 3265 8636
TIME...MOT...LOC 1508Z 219DEG 20KT 3273 8636 

HAIL...1.00IN
WIND...<50MPH
 
$$

40/Sizemore

347 
WWUS54 KBMX 091521
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1021 AM CDT Fri Apr 9 2021

ALC037-051-091531-
/O.CAN.KBMX.SV.W.0043.000000T0000Z-210409T1545Z/
Elmore AL-Coosa AL-
1021 AM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ELMORE AND SOUTH
CENTRAL COOSA COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Birmingham.

LAT...LON 3267 8641 3272 8642 3275 8641 3275 8638
      3277 8640 3288 8636 3280 8612 3265 8636
TIME...MOT...LOC 1521Z 217DEG 20KT 3279 8631 

$$

40/Sizemore

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 8:45 PM CDT	River Flood Warning	BMX	Greene, Pickens, Sumter	4 days
Apr 9, 6:09 AM CDT	Special Weather Statement	BMX	Bullock	51 min
Apr 9, 7:03 AM CDT	Severe Thunderstorm Warning	BMX	Marengo	28 min
Apr 9, 8:02 AM CDT	Special Weather Statement	BMX	Marengo	43 min
Apr 9, 8:06 AM CDT	Severe Thunderstorm Warning	BMX	Marengo	24 min
Apr 9, 8:22 AM CDT	Special Weather Statement	BMX	Barbour	38 min
Apr 9, 8:43 AM CDT	Special Weather Statement	BMX	Macon	32 min
Apr 9, 9:07 AM CDT	River Flood Warning	BMX	Greene, Marengo, Sumter	69 hr
Apr 9, 9:07 AM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Sumter	5 days
Apr 9, 9:14 AM CDT	River Flood Warning	BMX	Greene, Hale, Marengo	3 days
Apr 9, 9:40 AM CDT	Special Weather Statement	BMX	Elmore	50 min
Apr 9, 10:21 AM CDT	Special Weather Statement	BMX	Elmore	39 min
Apr 9, 10:32 AM CDT	Severe Thunderstorm Warning	BMX	Elmore	18 min
Apr 9, 11:07 AM CDT	Special Weather Statement	BMX	Macon	38 min
Apr 9, 11:12 AM CDT	Severe Thunderstorm Warning	BMX	Lee, Macon	26 min
Apr 9, 12:00 PM CDT	Special Weather Statement	BMX	Talladega	45 min
Apr 9, 12:11 PM CDT	Special Weather Statement	BMX	Shelby	49 min
Apr 9, 12:46 PM CDT	Special Weather Statement	BMX	Walker, Winston	44 min
Apr 9, 12:49 PM CDT	Special Weather Statement	BMX	Dallas	41 min
Apr 9, 12:51 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	54 min
Apr 9, 1:14 PM CDT	Special Weather Statement	BMX	Talladega	46 min
Apr 9, 1:22 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	36 min
Apr 9, 1:36 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	39 min
Apr 9, 1:40 PM CDT	Special Weather Statement	BMX	Autauga	35 min
Apr 9, 1:40 PM CDT	Special Weather Statement	BMX	Dallas	35 min
Apr 9, 1:52 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair	38 min
Apr 9, 1:55 PM CDT	Severe Thunderstorm Warning	BMX	Dallas, Lowndes	65 min
Apr 9, 2:05 PM CDT	Severe Thunderstorm Warning	BMX	Walker	55 min
Apr 9, 2:21 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes	54 min
Apr 9, 2:31 PM CDT	Special Weather Statement	BMX	St. Clair	44 min
Apr 9, 2:39 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	51 min
Apr 9, 3:21 PM CDT	Special Weather Statement	BMX	Pike	39 min
Apr 9, 4:04 PM CDT	Special Weather Statement	BMX	Hale	41 min
Apr 9, 4:13 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Marengo, Sumter	47 min
Apr 9, 4:34 PM CDT	Special Weather Statement	BMX	Shelby	41 min
Apr 9, 4:44 PM CDT	Special Weather Statement	BMX	Greene	31 min
Apr 9, 4:54 PM CDT	Severe Thunderstorm Warning	BMX	Greene	25 min
Apr 9, 4:56 PM CDT	Special Weather Statement	BMX	Hale	34 min
Apr 9, 5:28 PM CDT	Special Weather Statement	BMX	Pickens	32 min
Apr 9, 5:37 PM CDT	Special Weather Statement	BMX	Hale	23 min
Apr 9, 5:41 PM CDT	Special Weather Statement	BMX	Tuscaloosa	34 min
Apr 9, 5:47 PM CDT	Severe Thunderstorm Warning	BMX	Pickens, Tuscaloosa	28 min
Apr 9, 5:52 PM CDT	Special Weather Statement	BMX	Greene	23 min
Apr 9, 5:58 PM CDT	Special Weather Statement	BMX	Pickens	32 min
Apr 9, 6:11 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Pickens, Tuscaloosa	37 min
Apr 9, 6:15 PM CDT	Severe Thunderstorm Warning	BMX	Pickens	23 min
Apr 9, 6:37 PM CDT	Special Weather Statement	BMX	Pickens	23 min
Apr 9, 6:53 PM CDT	Special Weather Statement	BMX	Pickens	37 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.