Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Apr 9, 2021, 2:39 PM CDT for Blount County, Jefferson County, Walker County, Alabama. It was in force for 51 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, 2:39 PM CDT (19:39 UTC)
- Expired
- Apr 9, 2021, 3:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 2.0 in
- Wind
- 60.0 mph
Counties Blount County, AL, Jefferson County, AL, Walker County, AL
The radar
The Birmingham radar (KBMX), 82 km from the middle of the area, began a volume at 19:41 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, 3:06 PM CDT | HAIL 1 | 1 S Arkadelphia, AL | REPORTS OF QUARTER SIZE HAIL NEAR ARKADELPHIA. |
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, 7.7 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.
- 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
The text
As transmitted.
353
WUUS54 KBMX 091939
SVRBMX
ALC009-073-127-092045-
/O.NEW.KBMX.SV.W.0053.210409T1939Z-210409T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
239 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...
Southwestern Blount County in central Alabama...
North central Jefferson County in central Alabama...
* Until 345 PM CDT.
* At 239 PM CDT, a severe thunderstorm was located near Sipsey, or 8
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...
Gardendale, Sumiton, Warrior, Kimberly, Morris, Trafford, Hayden,
Sipsey, County Line, Rocky Hollow, Smith Dam, Blount Springs,
Arkadelphia, Lynns Park, Empire, Smoke Rise, Powellville, Rickwood
Caverns, Boldo and Partridge Crossroads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3384 8671 3370 8678 3381 8721 3395 8715
3395 8711 3392 8708 3390 8710 3389 8709
3389 8701 3387 8700 3386 8696 3387 8692
3391 8692 3392 8689 3394 8688 3393 8686
3395 8684 3394 8682 3396 8682 3396 8674
TIME...MOT...LOC 1939Z 275DEG 19KT 3387 8706
HAIL...2.00IN
WIND...60MPH
$$
40/Sizemore4 follow-up statements
469
WWUS54 KBMX 091949
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
249 PM CDT Fri Apr 9 2021
ALC009-073-127-092045-
/O.CON.KBMX.SV.W.0053.000000T0000Z-210409T2045Z/
Walker AL-Blount AL-Jefferson AL-
249 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTHEASTERN WALKER...SOUTHWESTERN BLOUNT AND NORTH CENTRAL
JEFFERSON COUNTIES...
At 248 PM CDT, a severe thunderstorm was located near Arkadelphia, or
near Sumiton, moving east at 20 mph.
HAZARD...Tennis ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Gardendale, Sumiton, Warrior, Kimberly, Morris, Trafford, Hayden,
Sipsey, County Line, Rocky Hollow, Blount Springs, Arkadelphia, Lynns
Park, Empire, Smoke Rise, Powellville, Rickwood Caverns and Partridge
Crossroads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3384 8671 3370 8678 3380 8717 3394 8710
3392 8708 3390 8710 3389 8709 3389 8701
3387 8700 3386 8696 3387 8692 3391 8692
3392 8689 3394 8688 3393 8686 3395 8684
3394 8682 3396 8682 3396 8674
TIME...MOT...LOC 1948Z 281DEG 19KT 3384 8701
HAIL...2.50IN
WIND...60MPH
$$
40/Sizemore650
WWUS54 KBMX 092005
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
305 PM CDT Fri Apr 9 2021
ALC009-073-127-092045-
/O.CON.KBMX.SV.W.0053.000000T0000Z-210409T2045Z/
Walker AL-Blount AL-Jefferson AL-
305 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR EASTERN WALKER...SOUTHWESTERN BLOUNT AND NORTH CENTRAL JEFFERSON
COUNTIES...
At 305 PM CDT, a severe thunderstorm was located near Arkadelphia, or
9 miles northeast of Sumiton, moving east at 20 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Gardendale, Sumiton, Warrior, Kimberly, Morris, Trafford, Hayden,
County Line, Rocky Hollow, Blount Springs, Arkadelphia, Empire, Smoke
Rise, Rickwood Caverns and Partridge Crossroads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3384 8671 3370 8678 3378 8709 3389 8702
3389 8701 3387 8700 3386 8696 3387 8692
3391 8692 3392 8689 3394 8688 3393 8686
3395 8684 3394 8682 3396 8682 3396 8674
TIME...MOT...LOC 2005Z 275DEG 19KT 3382 8690
HAIL...1.25IN
WIND...60MPH
$$
40/Sizemore115
WWUS54 KBMX 092017
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
317 PM CDT Fri Apr 9 2021
ALC009-073-127-092045-
/O.CON.KBMX.SV.W.0053.000000T0000Z-210409T2045Z/
Walker AL-Blount AL-Jefferson AL-
317 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR EASTERN WALKER...SOUTHWESTERN BLOUNT AND NORTH CENTRAL JEFFERSON
COUNTIES...
At 317 PM CDT, a severe thunderstorm was located over Kimberly, or 7
miles north of Gardendale, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Gardendale, Sumiton, Warrior, Kimberly, Morris, Trafford, County
Line, Arkadelphia, Empire, Partridge Crossroads and Smoke Rise.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3384 8671 3370 8678 3378 8707 3387 8699
3386 8696 3387 8692 3386 8688
TIME...MOT...LOC 2017Z 278DEG 19KT 3378 8682
HAIL...1.00IN
WIND...60MPH
$$
40/Sizemore325
WWUS54 KBMX 092030
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
330 PM CDT Fri Apr 9 2021
ALC009-073-127-092040-
/O.CAN.KBMX.SV.W.0053.000000T0000Z-210409T2045Z/
Walker AL-Blount AL-Jefferson AL-
330 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WALKER...SOUTHWESTERN
BLOUNT AND NORTH CENTRAL JEFFERSON 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.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
central Alabama.
LAT...LON 3384 8671 3370 8678 3378 8707 3387 8699
3386 8696 3387 8692 3386 8688
TIME...MOT...LOC 2027Z 275DEG 19KT 3377 8673
$$
87/GRANTHAMThe 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, 2:05 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, 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, 2021Every 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.