Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 81, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Aug 21, 2021, 3:15 PM CDT for Cullman County, Alabama. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2021, 3:15 PM CDT (20:15 UTC)
- Expired
- Aug 21, 2021, 3:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Cullman County, AL
The radar
The Birmingham radar (KBMX), 90 km from the middle of the area, began a volume at 20:15 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.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 8.3 hours before the alert went out and 89 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
- 284 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 689 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
638
WUUS54 KHUN 212015
SVRHUN
ALC043-212045-
/O.NEW.KHUN.SV.W.0081.210821T2015Z-210821T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
315 PM CDT Sat Aug 21 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Southwestern Cullman County in north central Alabama...
* Until 345 PM CDT.
* At 315 PM CDT, a severe thunderstorm was located near Smith Dam, or
12 miles southeast of Arley, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Hanceville, Dodge City, Garden City, Colony, Wilburn, Bremen,
Arkadelphia, Black Bottom and Smith Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3390 8710 3391 8708 3395 8711 3405 8710
3408 8670 3408 8669 3407 8670 3406 8668
3406 8671 3403 8670 3395 8679 3396 8682
3394 8682 3395 8684 3393 8686 3394 8688
3392 8689 3391 8692 3387 8692
TIME...MOT...LOC 2015Z 270DEG 29KT 3398 8703
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kula2 follow-up statements
377
WWUS54 KHUN 212035
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
335 PM CDT Sat Aug 21 2021
ALC043-212045-
/O.CON.KHUN.SV.W.0081.000000T0000Z-210821T2045Z/
Cullman AL-
335 PM CDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR SOUTHWESTERN CULLMAN COUNTY...
At 335 PM CDT, a severe thunderstorm was located near Blount Springs,
or 15 miles northeast of Sumiton, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hanceville, Dodge City, Garden City, Colony, Wilburn, Bremen,
Arkadelphia, Black Bottom and Smith Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3390 8710 3391 8708 3395 8711 3405 8710
3408 8670 3408 8669 3407 8670 3406 8668
3406 8671 3403 8670 3395 8679 3396 8682
3394 8682 3395 8684 3393 8686 3394 8688
3392 8689 3391 8692 3387 8692
TIME...MOT...LOC 2035Z 275DEG 26KT 3394 8688
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kula103
WWUS54 KHUN 212043
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
343 PM CDT Sat Aug 21 2021
ALC043-212053-
/O.EXP.KHUN.SV.W.0081.000000T0000Z-210821T2045Z/
Cullman AL-
343 PM CDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CULLMAN COUNTY
WILL EXPIRE AT 345 PM CDT...
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 will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
LAT...LON 3390 8710 3391 8708 3395 8711 3405 8710
3408 8670 3408 8669 3407 8670 3406 8668
3406 8671 3403 8670 3395 8679 3396 8682
3394 8682 3395 8684 3393 8686 3394 8688
3392 8689 3391 8692 3387 8692
TIME...MOT...LOC 2043Z 270DEG 29KT 3394 8681
$$
KulaThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 11:38 AM CDT | Special Weather Statement | HUN | Limestone | 52 min |
| Aug 21, 12:19 PM CDT | Special Weather Statement | HUN | Lawrence, Limestone, Madison | 41 min |
| Aug 21, 12:43 PM CDT | Special Weather Statement | HUN | Franklin | 47 min |
| Aug 21, 1:04 PM CDT | Special Weather Statement | HUN | Lawrence, Madison, Morgan | 41 min |
| Aug 21, 1:52 PM CDT | Special Weather Statement | HUN | Cullman, Morgan | 38 min |
| Aug 21, 2:25 PM CDT | Special Weather Statement | HUN | Cullman | 50 min |
| Aug 21, 2:31 PM CDT | Special Weather Statement | HUN | Lawrence | 44 min |
| Aug 21, 3:09 PM CDT | Special Weather Statement | HUN | Cullman | 51 min |
| Aug 21, 6:16 PM CDT | Severe Thunderstorm Warning | HUN | Colbert | 44 min |
| Aug 21, 6:24 PM CDT | Tornado Warning | HUN | Colbert | 23 min |
| Aug 21, 6:58 PM CDT | Special Weather Statement | HUN | Franklin | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.