Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS Birmingham, AL

May 4, 2021Coosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 4, 2021, 5:54 PM CDT for Coosa County, Alabama. It was in force for 50 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: May 4, 2021, 5:54 PM CDT (22:54 UTC)
Expired: May 4, 2021, 6:44 PM CDT
In force: 50 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Coosa County, AL

The radar

The Birmingham radar (KBMX), 51 km from the middle of the area, began a volume at 22:56 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
May 4, 6:11 PM CDT	TSTM WND DMG	3 Se Lyle, AL	TREES BLOWN DOWN AT VARIOUS LOCATIONS ACROSS COOSA COUNTY.
May 4, 6:30 PM CDT	TSTM WND DMG	Hwy 9 & Hwy 22, AL	TREES UPROOTED ON A HOME WITH TWO PEOPLE TRAPPED.

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.

Issued	Product	Office	Lasted
May 4, 3:31 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.9 hours before the alert went out and 52 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: 2158 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.3

Open this sounding in Storm Lab

The text

As transmitted.

947 
WUUS54 KBMX 042254
SVRBMX
ALC037-050000-
/O.NEW.KBMX.SV.W.0103.210504T2254Z-210505T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
554 PM CDT Tue May 4 2021

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Coosa County in east central Alabama...

* Until 700 PM CDT.

* At 554 PM CDT, severe thunderstorms were located along a line
  extending from near Lay Lake to near Pooles Crossroads, moving east
  at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Goodwater, Rockford, Kellyton, Weogufka, Equality, Stewartville,
  Hanover, Lyle, Pentonville, Dollar, Bradford, Cottage Grove,
  Strickland Crossroads, Bentleyville, Marble Valley, Moriah,
  Hatchet, Nixburg, Speed and Highway 9 and Highway 22.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for central and
east central Alabama.

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

&&

LAT...LON 3276 8601 3275 8632 3277 8632 3277 8634
      3275 8634 3275 8637 3282 8646 3286 8645
      3287 8647 3294 8652 3299 8651 3300 8652
      3305 8652 3307 8651 3310 8650 3311 8601
      3277 8602
TIME...MOT...LOC 2254Z 255DEG 47KT 3305 8661 3271 8669 

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

89^GSatterwhite

3 follow-up statements

753 
WWUS54 KBMX 042308
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
608 PM CDT Tue May 4 2021

ALC037-050000-
/O.CON.KBMX.SV.W.0103.000000T0000Z-210505T0000Z/
Coosa AL-
608 PM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR COOSA COUNTY...

At 608 PM CDT, severe thunderstorms were located along a line
extending from Strickland Crossroads to near Marbury, moving east at
65 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Goodwater, Rockford, Kellyton, Weogufka, Equality, Stewartville,
Hanover, Lyle, Pentonville, Dollar, Bradford, Cottage Grove,
Strickland Crossroads, Bentleyville, Marble Valley, Moriah, Hatchet,
Nixburg, Speed and Highway 9 and Highway 22.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for central and
east central Alabama.

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

&&

LAT...LON 3276 8601 3275 8632 3277 8632 3277 8634
      3275 8634 3275 8637 3282 8646 3286 8645
      3287 8647 3294 8652 3299 8651 3300 8652
      3305 8652 3307 8651 3310 8650 3311 8601
      3277 8602
TIME...MOT...LOC 2308Z 261DEG 56KT 3308 8636 3274 8644 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

89^GSatterwhite

003 
WWUS54 KBMX 042320
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
620 PM CDT Tue May 4 2021

ALC037-050000-
/O.CON.KBMX.SV.W.0103.000000T0000Z-210505T0000Z/
Coosa AL-
620 PM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR COOSA COUNTY...

At 620 PM CDT, severe thunderstorms were located along a line
extending from near Parkdale to Speed, moving east at 50 mph.

HAZARD...70 mph wind gusts. This line of storms has a history of 
         producing high winds and wind damage.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Goodwater, Rockford, Kellyton, Weogufka, Equality, Stewartville,
Hanover, Lyle, Pentonville, Dollar, Bradford, Cottage Grove,
Strickland Crossroads, Bentleyville, Marble Valley, Moriah, Hatchet,
Nixburg, Speed and Highway 9 and Highway 22.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for central and
east central Alabama.

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

&&

LAT...LON 3276 8601 3275 8632 3277 8632 3277 8634
      3275 8634 3275 8637 3282 8646 3286 8645
      3287 8647 3294 8652 3299 8651 3300 8652
      3305 8652 3307 8651 3310 8650 3311 8601
      3277 8602
TIME...MOT...LOC 2320Z 267DEG 45KT 3309 8616 3275 8624 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

89^GSatterwhite

474 
WWUS54 KBMX 042344
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
644 PM CDT Tue May 4 2021

ALC037-042354-
/O.CAN.KBMX.SV.W.0103.000000T0000Z-210505T0000Z/
Coosa AL-
644 PM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR COOSA COUNTY IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with these thunderstorms.

A Tornado Watch remains in effect until 1000 PM CDT for central and
east central Alabama.

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

LAT...LON 3276 8601 3275 8632 3277 8632 3277 8634
      3275 8634 3275 8637 3282 8646 3286 8645
      3287 8647 3294 8652 3299 8651 3300 8652
      3305 8652 3307 8651 3310 8650 3311 8601
      3277 8602
TIME...MOT...LOC 2342Z 255DEG 47KT 3317 8582 3283 8590 

$$

89^GSatterwhite

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:02 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Montgomery	43 min
May 3, 7:13 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Perry	32 min
May 3, 7:25 PM CDT	Flash Flood Warning	BMX	Autauga, Elmore, Macon, Montgomery	5 hr
May 3, 7:29 PM CDT	Areal Flood Advisory	BMX	Chambers, Lee, Macon, Tallapoosa	2 hr
May 3, 7:40 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Montgomery	47 min
May 3, 7:46 PM CDT	Special Weather Statement	BMX	Chilton	44 min
May 3, 8:30 PM CDT	Special Weather Statement	BMX	Lee, Macon	45 min
May 3, 8:36 PM CDT	Special Weather Statement	BMX	Chilton	39 min
May 3, 8:51 PM CDT	Areal Flood Advisory	BMX	Bibb, Chilton, Perry	3 hr
May 3, 8:59 PM CDT	Special Weather Statement	BMX	Russell	46 min
May 3, 9:31 PM CDT	Special Weather Statement	BMX	Shelby	59 min
May 4, 7:27 AM CDT	Special Weather Statement	BMX	Marion	48 min
May 4, 7:57 AM CDT	Special Weather Statement	BMX	Lamar, Marion	48 min
May 4, 9:07 AM CDT	Severe Thunderstorm Warning	BMX	Winston	38 min
May 4, 10:26 AM CDT	Severe Thunderstorm Warning	BMX	Blount	23 min
May 4, 10:59 AM CDT	Special Weather Statement	BMX	Walker	31 min
May 4, 11:00 AM CDT	Areal Flood Advisory	BMX	Fayette, Lamar, Walker	3 hr
May 4, 11:06 AM CDT	Areal Flood Advisory	BMX	Blount, Calhoun, Cherokee, Etowah, St. Clair	3 hr
May 4, 11:12 AM CDT	Tornado Warning	BMX	Fayette, Tuscaloosa	21 min
May 4, 11:25 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	50 min
May 4, 11:45 AM CDT	Areal Flood Advisory	BMX	Jefferson	2 hr
May 4, 11:49 AM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair	26 min
May 4, 12:03 PM CDT	Flash Flood Warning	BMX	Blount, Etowah, St. Clair	117 min
May 4, 12:10 PM CDT	Flash Flood Warning	BMX	Jefferson	7 hr
May 4, 12:14 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	46 min
May 4, 12:17 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby	28 min
May 4, 12:35 PM CDT	Flash Flood Warning	BMX	Calhoun, Etowah, St. Clair, Talladega	3 hr
May 4, 12:56 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Talladega	64 min
May 4, 1:15 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby	30 min
May 4, 1:25 PM CDT	Tornado Warning	BMX	Cleburne	24 min
May 4, 1:39 PM CDT	Flash Flood Warning	BMX	Jefferson, St. Clair, Shelby	5 hr
May 4, 2:07 PM CDT	Areal Flood Warning	BMX	Blount, Calhoun, Cherokee, Etowah, St. Clair	6 hr
May 4, 2:54 PM CDT	Areal Flood Advisory	BMX	Clay, Cleburne, Randolph, Shelby, Talladega	3 hr
May 4, 3:50 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	55 min
May 4, 4:01 PM CDT	Flash Flood Warning	BMX	Shelby, Talladega	3 hr
May 4, 4:05 PM CDT	Flash Flood Warning	BMX	Bibb, Tuscaloosa	3 hr
May 4, 4:13 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	29 min
May 4, 4:20 PM CDT	Severe Thunderstorm Warning	BMX	Greene	55 min
May 4, 4:30 PM CDT	Severe Thunderstorm Warning	BMX	Hale, Marengo	63 min
May 4, 4:45 PM CDT	Special Weather Statement	BMX	Walker, Winston	30 min
May 4, 5:00 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Dallas, Perry	75 min
May 4, 5:17 PM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	BMX	Jefferson, Shelby	3 hr
May 4, 5:29 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Lowndes	76 min
May 4, 5:30 PM CDT	Tornado Warning	BMX	Chilton, Perry	30 min
May 4, 5:38 PM CDT	Tornado Warning	BMX	Shelby	12 min
May 4, 5:59 PM CDT	Severe Thunderstorm Warning	BMX	Elmore	61 min
May 4, 6:07 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	68 min
May 4, 6:19 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	56 min
May 4, 6:24 PM CDT	Tornado Warning	BMX	Elmore, Montgomery	13 min
May 4, 6:37 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Macon, Pike	83 min
May 4, 6:41 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	61 min
May 4, 6:48 PM CDT	River Flood Warning	BMX	Bibb, Jefferson, Shelby	22 hr

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.