Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Mar 27, 2021, 4:25 PM CDT for Jefferson County, Walker County, Alabama. It was in force for 50 min. 5 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
- Mar 27, 2021, 4:25 PM CDT (21:25 UTC)
- Expired
- Mar 27, 2021, 5:15 PM CDT
- In force
- 50 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Jefferson County, AL, Walker County, AL
The radar
The Birmingham radar (KBMX), 77 km from the middle of the area, began a volume at 21:24 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 |
|---|---|---|---|
| Mar 27, 4:29 PM CDT | HAIL 1 | Boldo, AL | DIME TO QUARTER SIZE HAIL IN BOLDO. ALSO SEVERAL TREES DOWN. |
| Mar 27, 4:34 PM CDT | HAIL 1 | 2 Wsw Powellville, AL | QUARTER SIZE HAIL AND TREE DOWN IN PINEYWOODS. |
| Mar 27, 4:56 PM CDT | TSTM WND DMG | 2 Nne Cardiff, AL | REPORT OF A SWATH OF TREES DOWN WITH SOME TREES SNAPPED, MOSTLY FALLING IN THE SAME DIRECTION. PEA SIZE HAIL WAS ALSO REPORTED. EVENT TIME REPORTED WAS 4:53 PM WHILE BY RADAR THE TIME WAS CLOSER TO 4:59 PM. DELAYED REPORT RECEIVED THROUGH SOCIAL MEDIA. |
| Mar 27, 5:02 PM CDT | TSTM WND DMG | 2 Nne Cardiff, AL | TREES DOWN ON JOE NAIL ROAD. |
| Mar 27, 5:12 PM CDT | HAIL 1 | 3 Ssw Morris, AL | QUARTER SIZE HAIL SOUTH OF MORRIS. |
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, 9.4 hours before the alert went out and 76 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
- 1085 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.2
The text
As transmitted.
714
WUUS54 KBMX 272125
SVRBMX
ALC073-127-272215-
/O.NEW.KBMX.SV.W.0025.210327T2125Z-210327T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
425 PM CDT Sat Mar 27 2021
The National Weather Service in Birmingham has issued a
* Severe Thunderstorm Warning for...
Eastern Walker County in central Alabama...
Northwestern Jefferson County in central Alabama...
* Until 515 PM CDT.
* At 425 PM CDT, severe thunderstorms were located along a line
extending from near Cordova to near Gorgas Steam Plant, moving
northeast at 35 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, Gardendale, Fultondale, Sumiton, Cordova, Dora, Adamsville,
Warrior, Kimberly, Graysville, Morris, Brookside, Trafford, Sipsey,
Maytown, West Jefferson, County Line, Cardiff, Gorgas Steam Plant
and Gorgas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3392 8708 3391 8708 3390 8710 3389 8709
3389 8701 3387 8700 3386 8697 3384 8695
3382 8695 3382 8693 3384 8688 3384 8676
3381 8671 3365 8671 3351 8723 3382 8724
3393 8710
TIME...MOT...LOC 2125Z 230DEG 30KT 3379 8718 3360 8715
HAIL...1.00IN
WIND...60MPH
$$
32/Davis2 follow-up statements
671
WWUS54 KBMX 272145
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
445 PM CDT Sat Mar 27 2021
ALC127-272155-
/O.CAN.KBMX.SV.W.0025.000000T0000Z-210327T2215Z/
Walker AL-
445 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WALKER COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3381 8671 3365 8671 3355 8709 3363 8711
3363 8709 3366 8709 3366 8706 3368 8706
3369 8704 3376 8696 3379 8691 3384 8676
TIME...MOT...LOC 2145Z 247DEG 21KT 3362 8703
$$
ALC073-272215-
/O.CON.KBMX.SV.W.0025.000000T0000Z-210327T2215Z/
Jefferson AL-
445 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTH CENTRAL JEFFERSON COUNTY...
At 445 PM CDT, a severe thunderstorm was located near West Jefferson,
or 8 miles southeast of Dora, moving east at 25 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, Fultondale, Adamsville, Warrior, Kimberly, Graysville,
Morris, Brookside, Trafford, Maytown, West Jefferson, County Line,
Cardiff, Forestdale, Sayre, New Castle, Miller Steam Plant and
Partridge Crossroads.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3381 8671 3365 8671 3355 8709 3363 8711
3363 8709 3366 8709 3366 8706 3368 8706
3369 8704 3376 8696 3379 8691 3384 8676
TIME...MOT...LOC 2145Z 247DEG 21KT 3362 8703
HAIL...1.00IN
WIND...60MPH
$$
32/Davis395
WWUS54 KBMX 272158
SVSBMX
Severe Weather Statement
National Weather Service Birmingham AL
458 PM CDT Sat Mar 27 2021
ALC073-272215-
/O.CON.KBMX.SV.W.0025.000000T0000Z-210327T2215Z/
Jefferson AL-
458 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTH CENTRAL JEFFERSON COUNTY...
At 458 PM CDT, a severe thunderstorm was located over Cardiff, or 7
miles west of Gardendale, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Gardendale, Fultondale, Adamsville, Kimberly, Graysville, Morris,
Brookside, Cardiff and New Castle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3381 8671 3365 8671 3360 8696 3365 8702
3373 8693 3376 8687 3379 8678
TIME...MOT...LOC 2158Z 247DEG 26KT 3365 8694
HAIL...1.25IN
WIND...60MPH
$$
32/DavisThe office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 3:51 PM CDT | Special Weather Statement | BMX | Walker | 24 min |
| Mar 27, 4:10 PM CDT | Special Weather Statement | BMX | Jefferson | 50 min |
| Mar 27, 4:37 PM CDT | Special Weather Statement | BMX | Lamar | 53 min |
| Mar 27, 5:06 PM CDT | Severe Thunderstorm Warning | BMX | Jefferson | 39 min |
| Mar 27, 5:10 PM CDT | Severe Thunderstorm Warning | BMX | Pickens | 65 min |
| Mar 27, 5:39 PM CDT | Severe Thunderstorm Warning | BMX | Lamar | 36 min |
| Mar 27, 5:44 PM CDT | Special Weather Statement | BMX | St. Clair | 61 min |
| Mar 27, 5:59 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Pickens | 46 min |
| Mar 27, 6:06 PM CDT | Special Weather Statement | BMX | Jefferson | 24 min |
| Mar 27, 6:40 PM CDT | Special Weather Statement | BMX | Etowah | 65 min |
| Mar 27, 6:46 PM CDT | Special Weather Statement | BMX | Fayette | 29 min |
| Mar 27, 6:56 PM CDT | Special Weather Statement | BMX | Walker | 64 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.