Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 51, NWS Birmingham, AL

April 9, 2021Walker County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 9, 2021, 2:05 PM CDT for Walker County, Alabama. It was in force for 55 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: Apr 9, 2021, 2:05 PM CDT (19:05 UTC)
Expired: Apr 9, 2021, 3:00 PM CDT
In force: 55 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Walker County, AL

The radar

The Birmingham radar (KBMX), 92 km from the middle of the area, began a volume at 19:08 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, 2:18 PM CDT	HAIL 1	3 Nnw Manchester, AL	QUARTER SIZE HAIL REPORTED BETWEEN CURRY AND MANCHESTER. SOME HAIL MAY HAVE BEEN LARGER.

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
Apr 9, 12:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.1 hours before the alert went out and 90 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.

937 
WUUS54 KBMX 091905
SVRBMX
ALC127-092000-
/O.NEW.KBMX.SV.W.0051.210409T1905Z-210409T2000Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northeastern Walker County in central Alabama...

* Until 300 PM CDT.

* At 205 PM CDT, a severe thunderstorm was located near Jasper,
  moving east at 15 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...
  Jasper, Curry, Smith Dam, Smith Lake, Raccoon Branch, Powellville,
  Manchester, Gamble, Boldo, Walker County Airport and Lupton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3399 8714 3396 8713 3396 8711 3392 8708
      3391 8708 3390 8710 3389 8709 3389 8701
      3387 8701 3386 8697 3383 8695 3385 8737
      3398 8741 3400 8735 3399 8722 3398 8720
      3400 8719 3400 8717
TIME...MOT...LOC 1905Z 259DEG 14KT 3392 8733 

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

40/Sizemore

2 follow-up statements

907 
WWUS54 KBMX 091917
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
217 PM CDT Fri Apr 9 2021

ALC127-092000-
/O.CON.KBMX.SV.W.0051.000000T0000Z-210409T2000Z/
Walker AL-
217 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHEASTERN WALKER COUNTY...

At 217 PM CDT, a severe thunderstorm was located near Curry, or near
Jasper, moving east at 15 mph.

HAZARD...Ping pong 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...
Jasper, Curry, Smith Dam, Smith Lake, Raccoon Branch, Powellville,
Manchester, Boldo and Walker County Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3399 8714 3396 8713 3396 8711 3392 8708
      3391 8708 3390 8710 3389 8709 3389 8701
      3387 8701 3386 8697 3383 8695 3385 8732
      3396 8733 3399 8722 3398 8720 3400 8719
      3400 8717
TIME...MOT...LOC 1917Z 260DEG 14KT 3391 8725 

HAIL...1.50IN
WIND...60MPH
 
$$

40/Sizemore

400 
WWUS54 KBMX 091935
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
235 PM CDT Fri Apr 9 2021

ALC127-092000-
/O.CON.KBMX.SV.W.0051.000000T0000Z-210409T2000Z/
Walker AL-
235 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHEASTERN WALKER COUNTY...

At 234 PM CDT, a severe thunderstorm was located near Sipsey, or 9
miles north of Sumiton, moving east at 20 mph.

HAZARD...Two inch 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...
Jasper, Smith Dam, Smith Lake, Boldo and Powellville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3396 8719 3396 8711 3392 8708 3391 8708
      3390 8710 3389 8709 3389 8701 3387 8701
      3386 8697 3383 8695 3385 8724
TIME...MOT...LOC 1934Z 271DEG 17KT 3388 8711 

HAIL...2.00IN
WIND...60MPH
 
$$

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, 9:56 AM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Coosa, Elmore	25 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, 2:21 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.