Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 99, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Dec 11, 2021, 5:50 AM CST for 6 counties in Alabama. It was in force for 40 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
- Dec 11, 2021, 5:50 AM CST (11:50 UTC)
- Expired
- Dec 11, 2021, 6:30 AM CST
- In force
- 40 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Morgan County, AL
The radar
The Columbus AFB radar (KGWX), 106 km from the middle of the area, began a volume at 11:53 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 |
|---|---|---|---|
| Dec 11, 5:50 AM CST | TSTM WND DMG | 4 Nw Rogersville, AL | BATTING CAGE IN FRONT YARD HAD BEEN LOFTED AND CAUSED 200-300 YARD DEBRIS PATH. |
| Dec 11, 5:56 AM CST | TSTM WND DMG | 3 Ne Anderson, AL | A TREE WAS KNOCKED DOWN BLOCKING BOTH LANES OF HIGHWAY 99 ABOUT 3/4 MILES EAST OF HIGHWAY 207. TIME ESTIMATED BY RADAR. |
| Dec 11, 6:02 AM CST | TSTM WND DMG | Town Creek, AL | TREE DOWN SOUTH OF TOWN CREEK. |
| Dec 11, 6:15 AM CST | TSTM WND DMG | 4 Nw Elkmont, AL | TREES REPORTED DOWN IN ELKMONT NEAR THE STATE LINE ALONG HIGHWAY 127. |
| Dec 11, 6:26 AM CST | TSTM WND DMG | 4 E Elkmont, AL | ROOF DAMAGE TO CHURCH ON SANDLIN RD. REPORT VIA SOCIAL MEDIA. |
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 |
|---|---|---|---|
| Dec 11, 3:41 AM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 11.8 hours before the alert went out and 172 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
- 906 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 579 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 381 m²/s²
- 0-3 km storm-relative helicity
- 413 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.0
The text
As transmitted.
147
WUUS54 KHUN 111150
SVRHUN
ALC033-059-077-079-083-103-111230-
/O.NEW.KHUN.SV.W.0099.211211T1150Z-211211T1230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
550 AM CST Sat Dec 11 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Eastern Lauderdale County in northwestern Alabama...
Limestone County in north central Alabama...
Southeastern Colbert County in northwestern Alabama...
Franklin County in northwestern Alabama...
Northwestern Morgan County in north central Alabama...
Lawrence County in northwestern Alabama...
* Until 630 AM CST.
* At 550 AM CST, severe thunderstorms were located along a line
extending from Lexington to near Russellville to 8 miles southeast
of Red Bay, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Decatur, Florence, Athens, Muscle Shoals, Russellville, Sheffield,
Tuscumbia, Moulton, Trinity and Rogersville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
&&
LAT...LON 3436 8817 3456 8786 3501 8748 3499 8678
3492 8678 3450 8711 3430 8738 3432 8817
TIME...MOT...LOC 1150Z 275DEG 28KT 3496 8740 3455 8773 3432 8807
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTW4 follow-up statements
296
WWUS54 KHUN 111202
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
602 AM CST Sat Dec 11 2021
ALC033-059-077-079-083-103-111230-
/O.CON.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Lauderdale AL-Limestone AL-Colbert AL-Franklin AL-Morgan AL-
Lawrence AL-
602 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CST
FOR EASTERN LAUDERDALE...LIMESTONE...SOUTHEASTERN COLBERT...
FRANKLIN...NORTHWESTERN MORGAN AND LAWRENCE COUNTIES...
At 601 AM CST, severe thunderstorms were located along a line
extending from near Lexington to near Littleville to 8 miles west of
Hackleburg, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Decatur, Athens, Russellville, Moulton, Trinity, Rogersville,
Ardmore, Phil Campbell, Town Creek and Littleville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3436 8817 3457 8780 3475 8757 3489 8738
3500 8728 3499 8678 3492 8678 3450 8711
3430 8738 3432 8817
TIME...MOT...LOC 1201Z 275DEG 28KT 3495 8730 3454 8763 3431 8797
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTW163
WWUS54 KHUN 111208
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
608 AM CST Sat Dec 11 2021
ALC033-059-077-079-083-103-111230-
/O.CON.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Lauderdale AL-Limestone AL-Colbert AL-Franklin AL-Morgan AL-
Lawrence AL-
608 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CST
FOR EASTERN LAUDERDALE...LIMESTONE...SOUTHEASTERN COLBERT...
FRANKLIN...NORTHWESTERN MORGAN AND LAWRENCE COUNTIES...
At 605 AM CST, severe thunderstorms were located along a line
extending from near Lexington to near Littleville to 8 miles west of
Hackleburg, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters reported roof damage and tree
damage in the Quad Cities area with this storm.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Decatur, Athens, Russellville, Moulton, Trinity, Rogersville,
Ardmore, Phil Campbell, Town Creek and Littleville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3436 8817 3457 8780 3475 8757 3489 8738
3500 8728 3499 8678 3492 8678 3450 8711
3430 8738 3432 8817
TIME...MOT...LOC 1205Z 275DEG 28KT 3495 8730 3454 8763 3431 8797
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTW321
WWUS54 KHUN 111220
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
620 AM CST Sat Dec 11 2021
ALC077-111228-
/O.CAN.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Lauderdale AL-
620 AM CST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN LAUDERDALE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
LAT...LON 3461 8762 3474 8747 3480 8734 3476 8731
3476 8727 3478 8728 3482 8721 3492 8721
3499 8715 3499 8678 3492 8678 3450 8711
3430 8738 3432 8803
TIME...MOT...LOC 1218Z 275DEG 28KT 3494 8719 3453 8752 3430 8786
$$
ALC033-059-079-083-103-111230-
/O.CON.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Limestone AL-Colbert AL-Franklin AL-Morgan AL-Lawrence AL-
620 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CST
FOR LIMESTONE...SOUTHEASTERN COLBERT...EASTERN FRANKLIN...
NORTHWESTERN MORGAN AND LAWRENCE COUNTIES...
At 618 AM CST, severe thunderstorms were located along a line
extending from 10 miles northeast of Rogersville to 9 miles southeast
of Littleville to near Hackleburg, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters reported a tree down in the Town
Creek area alogn with roof damage and other tree damage in
the Quad Cities area.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Decatur, Athens, Russellville, Moulton, Trinity, Ardmore, Phil
Campbell, Town Creek, Leighton and Courtland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3461 8762 3474 8747 3480 8734 3476 8731
3476 8727 3478 8728 3482 8721 3492 8721
3499 8715 3499 8678 3492 8678 3450 8711
3430 8738 3432 8803
TIME...MOT...LOC 1218Z 275DEG 28KT 3494 8719 3453 8752 3430 8786
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTW157
WWUS54 KHUN 111225
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
625 AM CST Sat Dec 11 2021
ALC033-111234-
/O.CAN.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Colbert AL-
625 AM CST Sat Dec 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COLBERT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
LAT...LON 3432 8795 3457 8752 3477 8722 3499 8704
3499 8678 3492 8678 3450 8711 3430 8738
TIME...MOT...LOC 1224Z 275DEG 28KT 3494 8714 3453 8747 3430 8781
$$
ALC059-079-083-103-111230-
/O.CON.KHUN.SV.W.0099.000000T0000Z-211211T1230Z/
Limestone AL-Franklin AL-Morgan AL-Lawrence AL-
625 AM CST Sat Dec 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CST
FOR CENTRAL LIMESTONE...SOUTHEASTERN FRANKLIN...NORTHWESTERN MORGAN
AND LAWRENCE COUNTIES...
At 624 AM CST, severe thunderstorms were located along a line
extending from 11 miles northeast of Rogersville to 10 miles west of
Moulton to near Hackleburg, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Decatur, Athens, Moulton, Trinity, Ardmore, Phil Campbell, Courtland,
Tanner, North Courtland and Hillsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 AM CST for north central
and northwestern Alabama...and Middle Tennessee.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3432 8795 3457 8752 3477 8722 3499 8704
3499 8678 3492 8678 3450 8711 3430 8738
TIME...MOT...LOC 1224Z 275DEG 28KT 3494 8714 3453 8747 3430 8781
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTWThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 11, 4:29 AM CST | Severe Thunderstorm Warning | HUN | Colbert, Franklin | 31 min |
| Dec 11, 4:40 AM CST | Tornado Warning | HUN | Colbert, Franklin | 22 min |
| Dec 11, 4:59 AM CST | Severe Thunderstorm Warning | HUN | Colbert, Franklin, Lauderdale | 31 min |
| Dec 11, 5:27 AM CST | Severe Thunderstorm Warning | HUN | Colbert, Franklin, Lauderdale | 33 min |
| Dec 11, 6:31 AM CST | Special Weather Statement | HUN | Lawrence, Limestone, Madison, Morgan | 29 min |
| Dec 11, 6:41 AM CST | Severe Thunderstorm Warning | HUN | Madison | 34 min |
| Dec 11, 7:01 AM CST | Special Weather Statement | HUN | Madison, Morgan | 44 min |
| Dec 11, 7:06 AM CST | Severe Thunderstorm Warning | HUN | Cullman, Jackson, Lawrence, Limestone, Madison, Morgan | 24 min |
| Dec 11, 7:31 AM CST | Severe Thunderstorm Warning | HUN | Cullman, Jackson, Limestone, Madison, Marshall, Morgan | 29 min |
| Dec 11, 7:57 AM CST | Special Weather Statement | HUN | Cullman, Jackson, Marshall, Morgan | 48 min |
| Dec 11, 9:12 AM CST | Special Weather Statement | HUN | DeKalb | 33 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.