Alert archive / Alabama / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Birmingham, AL

April 9, 2021Walker County, Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 9, 2021, 1:36 PM CDT for Walker County, Winston County, Alabama. It was in force for 39 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, 1:36 PM CDT (18:36 UTC)
Expired: Apr 9, 2021, 2:15 PM CDT
In force: 39 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Walker County, AL, Winston County, AL

The radar

The Columbus AFB radar (KGWX), 81 km from the middle of the area, began a volume at 18:36 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, 2:02 PM CDT	HAIL 0.75	3 E Nauvoo, AL	REPORT FROM MPING: DIME (0.75 IN.).
Apr 9, 2:03 PM CDT	HAIL 0.75	2 Nnw Lupton, AL	REPORT FROM MPING: DIME (0.75 IN.).

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, 6.6 hours before the alert went out and 108 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.

196 
WUUS54 KBMX 091836
SVRBMX
ALC127-133-091915-
/O.NEW.KBMX.SV.W.0048.210409T1836Z-210409T1915Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northwestern Walker County in central Alabama...
  Southwestern Winston County in northwestern Alabama...

* Until 215 PM CDT.

* At 136 PM CDT, a severe thunderstorm was located near Nauvoo, or
  near Carbon Hill, moving northeast at 10 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...
  Carbon Hill, Lynn, Kansas, Nauvoo, Eldridge, Poplar Springs, Camp
  McDowell, Ashbank, Smith Lake, Lupton, Battle Branch and Seymour
  Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3399 8721 3388 8751 3393 8764 3395 8764
      3411 8751
TIME...MOT...LOC 1836Z 225DEG 10KT 3395 8752 

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

40/Sizemore

1 follow-up statement

616 
WWUS54 KBMX 091859
SVSBMX

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

ALC127-133-091915-
/O.CON.KBMX.SV.W.0048.000000T0000Z-210409T1915Z/
Walker AL-Winston AL-
159 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT
FOR NORTH CENTRAL WALKER AND SOUTH CENTRAL WINSTON COUNTIES...

At 159 PM CDT, a severe thunderstorm was located near Poplar Springs,
or 8 miles northeast of Carbon Hill, moving northeast at 10 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...
Nauvoo, Poplar Springs, Camp McDowell, Smith Lake, Lupton, Battle
Branch and Seymour Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3390 8747 3395 8753 3408 8743 3399 8721
TIME...MOT...LOC 1859Z 232DEG 10KT 3397 8740 

HAIL...1.00IN
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, 1:40 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.