Alert archive / Alabama / Tornado Warnings in 2021

Tornado Warning 12, NWS Huntsville, AL

December 6, 2021Cullman County, Marshall County, Alabama

NWS Huntsville, AL issued this tornado warning at Dec 6, 2021, 9:57 AM CST for Cullman County, Marshall County, Alabama. It was in force for 18 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: Dec 6, 2021, 9:57 AM CST (15:57 UTC)
Expired: Dec 6, 2021, 10:15 AM CST
In force: 18 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cullman County, AL, Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 89 km from the middle of the area, began a volume at 15:57 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, 4.0 hours before the alert went out and 118 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: 219 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

765 
WFUS54 KHUN 061557
TORHUN
ALC043-095-061615-
/O.NEW.KHUN.TO.W.0012.211206T1557Z-211206T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Huntsville AL
957 AM CST Mon Dec 6 2021

The National Weather Service in Huntsville Alabama has issued a

* Tornado Warning for...
  South central Marshall County in northeastern Alabama...
  Northeastern Cullman County in north central Alabama...

* Until 1015 AM CST.
    
* At 956 AM CST, a severe thunderstorm capable of producing a tornado
  was located near Holly Pond, or 7 miles north of Blountsville,
  moving east at 35 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  south central Marshall and northeastern Cullman Counties, including
  the following locations... Baileyton, Hyatt and Douglas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3425 8645 3425 8652 3423 8652 3422 8654
      3420 8655 3419 8655 3415 8658 3416 8663
      3427 8663 3425 8631 3412 8633
TIME...MOT...LOC 1556Z 279DEG 31KT 3421 8657 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

KTW

2 follow-up statements

606 
WWUS54 KHUN 061606
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
1006 AM CST Mon Dec 6 2021

ALC043-061616-
/O.CAN.KHUN.TO.W.0012.000000T0000Z-211206T1615Z/
Cullman AL-
1006 AM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR NORTHEASTERN CULLMAN COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3425 8645 3425 8631 3412 8633
TIME...MOT...LOC 1606Z 279DEG 31KT 3420 8647 

$$

ALC095-061615-
/O.CON.KHUN.TO.W.0012.000000T0000Z-211206T1615Z/
Marshall AL-
1006 AM CST Mon Dec 6 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM CST FOR SOUTH
CENTRAL MARSHALL COUNTY...
    
At 1006 AM CST, a severe thunderstorm capable of producing a tornado
was located over Brooksville, or 8 miles south of Arab, moving east
at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Douglas and Hyatt. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3425 8645 3425 8631 3412 8633
TIME...MOT...LOC 1606Z 279DEG 31KT 3420 8647 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

KTW

296 
WWUS54 KHUN 061615
SVSHUN

Severe Weather Statement
National Weather Service Huntsville AL
1015 AM CST Mon Dec 6 2021

ALC095-061624-
/O.EXP.KHUN.TO.W.0012.000000T0000Z-211206T1615Z/
Marshall AL-
1015 AM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL MARSHALL COUNTY WILL EXPIRE
AT 1015 AM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

LAT...LON 3425 8645 3425 8631 3412 8633
TIME...MOT...LOC 1614Z 279DEG 31KT 3419 8640 

$$

KTW

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 6, 6:01 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin	29 min
Dec 6, 6:31 AM CST	Special Weather Statement	HUN	Colbert, Franklin, Lawrence	29 min
Dec 6, 6:59 AM CST	Special Weather Statement	HUN	Franklin, Lawrence	31 min
Dec 6, 7:02 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Limestone, Madison	28 min
Dec 6, 7:05 AM CST	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	40 min
Dec 6, 8:07 AM CST	Special Weather Statement	HUN	Madison	23 min
Dec 6, 8:34 AM CST	Special Weather Statement	HUN	Madison	41 min
Dec 6, 8:50 AM CST	Special Weather Statement	HUN	Cullman, Morgan	40 min
Dec 6, 9:06 AM CST	Severe Thunderstorm Warning	HUN	Cullman, Morgan	24 min
Dec 6, 9:11 AM CST	Special Weather Statement	HUN	Madison	34 min
Dec 6, 9:16 AM CST	Tornado Warning	HUN	Morgan	14 min
Dec 6, 9:34 AM CST	Severe Thunderstorm Warning	HUN	Cullman, Marshall, Morgan	26 min

Nearby

Tornado Warnings in Alabama, 2021 Every tornado warning in 2021 Tornadoes 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.