Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 134, NWS Birmingham, AL

July 31, 2021Calhoun County, St. Clair County, Talladega County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 31, 2021, 3:04 PM CDT for Calhoun County, St. Clair County, Talladega County, Alabama. It was in force for 41 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: Jul 31, 2021, 3:04 PM CDT (20:04 UTC)
Expired: Jul 31, 2021, 3:45 PM CDT
In force: 41 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calhoun County, AL, St. Clair County, AL, Talladega County, AL

The radar

The Birmingham radar (KBMX), 81 km from the middle of the area, began a volume at 20:04 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
Jul 31, 3:05 PM CDT	TSTM WND DMG	1 Wsw Ragland, AL	TREES AND POWERLINES WERE BLOWN DOWN IN RAGLAND.

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, 8.1 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-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: 1260 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1122 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

185 
WUUS54 KBMX 312004
SVRBMX
ALC015-115-121-312045-
/O.NEW.KBMX.SV.W.0134.210731T2004Z-210731T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
304 PM CDT Sat Jul 31 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  North central Talladega County in east central Alabama...
  Southwestern Calhoun County in east central Alabama...
  Eastern St. Clair County in central Alabama...

* Until 345 PM CDT.

* At 304 PM CDT, a severe thunderstorm was located near Ragland, or
  12 miles northeast of Odenville, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Pell City, Lincoln, Ashville, Riverside, Ragland, Ohatchee,
  Talladega Superspeedway, Honda Manufacturing Of Alabama, Bynum,
  Talladega Municipal Airport, Logan Martin Lake, Neely Henry Lake,
  Anniston Army Depot, St. Clair County Airport, Wattsville, Neely
  Henry Dam, Eastaboga, Jackson Shoals and Cropwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3381 8633 3387 8611 3361 8590 3347 8625
TIME...MOT...LOC 2004Z 333DEG 16KT 3377 8620 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

2 follow-up statements

106 
WWUS54 KBMX 312016
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
316 PM CDT Sat Jul 31 2021

ALC015-115-121-312045-
/O.CON.KBMX.SV.W.0134.000000T0000Z-210731T2045Z/
Talladega AL-Calhoun AL-St. Clair AL-
316 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTH CENTRAL TALLADEGA...SOUTHWESTERN CALHOUN AND EAST CENTRAL
ST. CLAIR COUNTIES...

At 316 PM CDT, a severe thunderstorm was located over Ragland, or 12
miles northeast of Pell City, moving southeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Lincoln, Riverside, Ragland, Talladega Superspeedway, Honda
Manufacturing Of Alabama, Bynum, Talladega Municipal Airport, Logan
Martin Lake, Anniston Army Depot, Jackson Shoals and Eastaboga.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 8625 3382 8611 3360 8593 3349 8619
TIME...MOT...LOC 2016Z 333DEG 16KT 3372 8617 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

278 
WWUS54 KBMX 312029
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
329 PM CDT Sat Jul 31 2021

ALC115-312039-
/O.CAN.KBMX.SV.W.0134.000000T0000Z-210731T2045Z/
St. Clair AL-
329 PM CDT Sat Jul 31 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. CLAIR COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area.  Therefore, the warning has been cancelled.

LAT...LON 3360 8593 3349 8619 3353 8620 3355 8619
      3356 8621 3359 8621 3359 8619 3360 8618
      3361 8620 3362 8617 3364 8617 3367 8618
      3368 8617 3367 8615 3370 8615 3376 8606
TIME...MOT...LOC 2029Z 333DEG 16KT 3367 8614 

$$

ALC015-121-312045-
/O.CON.KBMX.SV.W.0134.000000T0000Z-210731T2045Z/
Talladega AL-Calhoun AL-
329 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTH CENTRAL TALLADEGA AND SOUTHWESTERN CALHOUN COUNTIES...

At 329 PM CDT, a severe thunderstorm was located near Honda
Manufacturing Of Alabama, or 10 miles northeast of Pell City, moving
southeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Lincoln, Talladega Superspeedway, Honda Manufacturing Of Alabama,
Bynum, Talladega Municipal Airport, Logan Martin Lake, Anniston Army
Depot, Jackson Shoals and Eastaboga.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3360 8593 3349 8619 3353 8620 3355 8619
      3356 8621 3359 8621 3359 8619 3360 8618
      3361 8620 3362 8617 3364 8617 3367 8618
      3368 8617 3367 8615 3370 8615 3376 8606
TIME...MOT...LOC 2029Z 333DEG 16KT 3367 8614 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:07 PM CDT	Special Weather Statement	BMX	Winston	38 min
Jul 30, 7:45 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	31 min
Jul 30, 7:51 PM CDT	Severe Thunderstorm Warning	BMX	Blount	39 min
Jul 31, 2:25 PM CDT	Special Weather Statement	BMX	Russell	50 min
Jul 31, 2:26 PM CDT	Special Weather Statement	BMX	St. Clair	49 min
Jul 31, 2:28 PM CDT	Special Weather Statement	BMX	Chilton	47 min
Jul 31, 2:29 PM CDT	Special Weather Statement	BMX	Dallas	46 min
Jul 31, 2:44 PM CDT	Special Weather Statement	BMX	Shelby	46 min
Jul 31, 2:47 PM CDT	Special Weather Statement	BMX	Jefferson, Walker	43 min
Jul 31, 2:56 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	49 min
Jul 31, 3:09 PM CDT	Special Weather Statement	BMX	Chilton	51 min
Jul 31, 3:11 PM CDT	Special Weather Statement	BMX	Russell	34 min
Jul 31, 3:23 PM CDT	Special Weather Statement	BMX	Coosa	37 min
Jul 31, 3:34 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby	41 min
Jul 31, 3:38 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa, Shelby, Talladega	52 min
Jul 31, 3:41 PM CDT	Special Weather Statement	BMX	Talladega	34 min
Jul 31, 3:57 PM CDT	Special Weather Statement	BMX	Shelby	33 min
Jul 31, 3:59 PM CDT	Special Weather Statement	BMX	Elmore, Montgomery	46 min
Jul 31, 4:12 PM CDT	Special Weather Statement	BMX	Clay, Randolph	48 min
Jul 31, 4:18 PM CDT	Special Weather Statement	BMX	Chambers	42 min
Jul 31, 4:22 PM CDT	Special Weather Statement	BMX	Tallapoosa	53 min
Jul 31, 4:45 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	45 min
Jul 31, 4:49 PM CDT	Special Weather Statement	BMX	Bibb	41 min
Jul 31, 5:00 PM CDT	Special Weather Statement	BMX	Lee	60 min
Jul 31, 6:36 PM CDT	Special Weather Statement	BMX	Barbour, Russell	39 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.