Alert archive / Alabama / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Mar 17, 2021, 4:07 PM CDT for Colbert County, Franklin County, Lauderdale County, Alabama. It was in force for 26 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
- Mar 17, 2021, 4:07 PM CDT (21:07 UTC)
- Expired
- Mar 17, 2021, 4:33 PM CDT
- In force
- 26 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Colbert County, AL, Franklin County, AL, Lauderdale County, AL
The radar
The Columbus AFB radar (KGWX), 91 km from the middle of the area, began a volume at 21:12 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 17, 11:36 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 9.1 hours before the alert went out and 187 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
- 18 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1466 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
866
WUUS54 KHUN 172107
SVRHUN
ALC033-059-077-172145-
/O.NEW.KHUN.SV.W.0004.210317T2107Z-210317T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
407 PM CDT Wed Mar 17 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
South central Lauderdale County in northwestern Alabama...
Western Colbert County in northwestern Alabama...
Northwestern Franklin County in northwestern Alabama...
* Until 445 PM CDT.
* At 406 PM CDT, a severe thunderstorm was located 9 miles northwest
of Belgreen, or 9 miles northeast of Red Bay, moving northeast at
30 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...
Sheffield, Tuscumbia, Cherokee, Littleville, Posey Loop, Mt Hester,
Cedar Creek Reservoir, Srygley Church, New Bethel and Oakland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM CDT for northwestern
Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3446 8807 3477 8804 3492 8781 3459 8762
TIME...MOT...LOC 2106Z 236DEG 25KT 3454 8802
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
GH2 follow-up statements
763
WWUS54 KHUN 172125
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
425 PM CDT Wed Mar 17 2021
ALC059-172134-
/O.CAN.KHUN.SV.W.0004.000000T0000Z-210317T2145Z/
Franklin AL-
425 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FRANKLIN COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 700 PM CDT for northwestern
Alabama.
LAT...LON 3459 8795 3475 8800 3492 8781 3464 8765
TIME...MOT...LOC 2124Z 236DEG 25KT 3461 8789
$$
ALC033-077-172145-
/O.CON.KHUN.SV.W.0004.000000T0000Z-210317T2145Z/
Lauderdale AL-Colbert AL-
425 PM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTH CENTRAL LAUDERDALE AND SOUTHWESTERN COLBERT COUNTIES...
At 424 PM CDT, a severe thunderstorm was located 9 miles north of
Belgreen, or 11 miles northwest of Russellville, moving northeast at
30 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...
Sheffield, Tuscumbia, Cherokee, Red Rock, Posey Loop, Pride Landing,
Srygley Church, New Bethel, Colbert Heights and Oakland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM CDT for northwestern
Alabama.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3459 8795 3475 8800 3492 8781 3464 8765
TIME...MOT...LOC 2124Z 236DEG 25KT 3461 8789
HAIL...1.00IN
WIND...60MPH
$$
GH397
WWUS54 KHUN 172133
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
433 PM CDT Wed Mar 17 2021
ALC033-077-172142-
/O.CAN.KHUN.SV.W.0004.000000T0000Z-210317T2145Z/
Lauderdale AL-Colbert AL-
433 PM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LAUDERDALE AND
SOUTHWESTERN COLBERT COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 700 PM CDT for northwestern
Alabama.
LAT...LON 3459 8795 3475 8800 3492 8781 3464 8765
TIME...MOT...LOC 2130Z 236DEG 25KT 3464 8783
$$
GHThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 1:24 AM CDT | Dense Fog Advisory | HUN | Cullman, DeKalb, Jackson, Marshall | 7 hr |
| Mar 17, 7:25 AM CDT | Special Weather Statement | HUN | Morgan | 50 min |
| Mar 17, 7:57 AM CDT | Special Weather Statement | HUN | Madison | 48 min |
| Mar 17, 7:59 AM CDT | Special Weather Statement | HUN | Colbert | 46 min |
| Mar 17, 9:52 AM CDT | Special Weather Statement | HUN | Jackson | 23 min |
| Mar 17, 3:40 PM CDT | Tornado Warning | HUN | Colbert, Franklin | 35 min |
| Mar 17, 4:17 PM CDT | Flash Flood Watch | HUN | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 8 hr |
| Mar 17, 4:44 PM CDT | Flash Flood Warning | HUN | Cullman, Morgan | 5 hr |
| Mar 17, 5:24 PM CDT | Areal Flood Warning | HUN | Colbert, Franklin, Lauderdale | 9 hr |
| Mar 17, 5:49 PM CDT | Areal Flood Warning | HUN | Cullman | 8 hr |
| Mar 17, 6:05 PM CDT | Severe Thunderstorm Warning | HUN | Marshall | 22 min |
| Mar 17, 6:44 PM CDT | Tornado Warning | HUN | Cullman | 31 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.