Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jul 30, 2021, 7:45 PM CDT for Marshall County, Alabama. It was in force for 19 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
- Jul 30, 2021, 7:45 PM CDT (00:45 UTC)
- Expired
- Jul 30, 2021, 8:04 PM CDT
- In force
- 19 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Marshall County, AL
The radar
The Northeast Alabama radar (KHTX), 73 km from the middle of the area, began a volume at 00:45 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 00:00Z, 0.8 hours before the alert went out and 132 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
- 2302 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1114 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
493
WUUS54 KHUN 310045
SVRHUN
ALC095-310115-
/O.NEW.KHUN.SV.W.0072.210731T0045Z-210731T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
745 PM CDT Fri Jul 30 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Marshall County in northeastern Alabama...
* Until 815 PM CDT.
* At 745 PM CDT, a severe thunderstorm was located near Guntersville,
moving south at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Albertville, Boaz, Guntersville, Arab, Grant, Douglas, Union Grove,
McVille, High Point and Horton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3421 8642 3426 8646 3429 8646 3429 8648
3430 8648 3430 8650 3443 8648 3455 8615
3443 8611 3440 8612 3434 8611 3419 8610
3418 8619 3410 8630
TIME...MOT...LOC 0045Z 348DEG 19KT 3436 8621
HAIL...<.75IN
WIND...60MPH
$$
KTW2 follow-up statements
977
WWUS54 KHUN 310056
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
756 PM CDT Fri Jul 30 2021
ALC095-310115-
/O.CON.KHUN.SV.W.0072.000000T0000Z-210731T0115Z/
Marshall AL-
756 PM CDT Fri Jul 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHEASTERN MARSHALL COUNTY...
At 756 PM CDT, a severe thunderstorm was located over Albertville,
moving south at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Albertville, Boaz, Guntersville, Douglas, McVille, High Point,
Horton, Hustleville, Rabbit Town and Hyatt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3420 8640 3422 8638 3435 8632 3439 8625
3436 8615 3431 8611 3419 8610 3418 8619
3410 8630
TIME...MOT...LOC 0056Z 348DEG 19KT 3430 8619
HAIL...<.75IN
WIND...60MPH
$$
KTW029
WWUS54 KHUN 310104
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
804 PM CDT Fri Jul 30 2021
ALC095-310113-
/O.CAN.KHUN.SV.W.0072.000000T0000Z-210731T0115Z/
Marshall AL-
804 PM CDT Fri Jul 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARSHALL COUNTY
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. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 3420 8640 3422 8638 3435 8632 3439 8625
3436 8615 3431 8611 3419 8610 3418 8619
3410 8630
TIME...MOT...LOC 0103Z 348DEG 19KT 3426 8619
$$
KTWThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 7:19 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson, Madison, Marshall | 26 min |
| Jul 30, 7:45 PM CDT | Special Weather Statement | HUN | Cullman | 45 min |
| Jul 30, 7:50 PM CDT | Special Weather Statement | HUN | Colbert | 25 min |
| Jul 30, 8:25 PM CDT | Special Weather Statement | HUN | Lauderdale | 50 min |
| Jul 30, 8:32 PM CDT | Special Weather Statement | HUN | Cullman | 28 min |
| Jul 30, 8:37 PM CDT | Special Weather Statement | HUN | Morgan | 23 min |
| Jul 30, 8:46 PM CDT | Special Weather Statement | HUN | Colbert, Franklin, Lawrence | 44 min |
| Jul 30, 9:05 PM CDT | Special Weather Statement | HUN | Lawrence | 25 min |
| Jul 30, 9:25 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence, Morgan | 35 min |
| Jul 30, 10:00 PM CDT | Special Weather Statement | HUN | Cullman, Lawrence | 30 min |
| Jul 31, 2:12 PM CDT | Special Weather Statement | HUN | Cullman | 48 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.