Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 79, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Aug 11, 2021, 5:38 PM CDT for Jackson County, Madison County, Alabama; Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 25 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 11, 2021, 5:38 PM CDT (22:38 UTC)
- Expired
- Aug 11, 2021, 6:03 PM CDT
- In force
- 25 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Jackson County, AL, Madison County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN
The radar
The Northeast Alabama radar (KHTX), 18 km from the middle of the area, began a volume at 22:38 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
Nashville Metro, TN (KBNA), launched 12:00Z, 10.6 hours before the alert went out and 134 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
- 2131 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 942 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
120
WUUS54 KHUN 112238
SVRHUN
ALC071-089-TNC051-103-127-112330-
/O.NEW.KHUN.SV.W.0079.210811T2238Z-210811T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
538 PM CDT Wed Aug 11 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Northwestern Jackson County in northeastern Alabama...
Northeastern Madison County in north central Alabama...
Southeastern Moore County in Middle Tennessee...
Southeastern Lincoln County in Middle Tennessee...
Southwestern Franklin County in Middle Tennessee...
* Until 630 PM CDT.
* At 537 PM CDT, a line of severe thunderstorms was located over New
Market extending to near Flintville, moving northeast at 5 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Huntland, New Market, Tims Ford Lake, Lexie Crossroads, Plevna,
Harmony, Elora, Hurdlow, Marble Hill and Smithland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3525 8623 3500 8622 3498 8621 3496 8621
3492 8622 3491 8622 3489 8624 3487 8623
3485 8626 3482 8629 3481 8635 3480 8639
3488 8645 3517 8647
TIME...MOT...LOC 2237Z 223DEG 6KT 3490 8639
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KTW1 follow-up statement
877
WWUS54 KHUN 112303
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
603 PM CDT Wed Aug 11 2021
ALC071-089-TNC051-103-127-112313-
/O.CAN.KHUN.SV.W.0079.000000T0000Z-210811T2330Z/
Jackson AL-Madison AL-Moore TN-Lincoln TN-Franklin TN-
603 PM CDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JACKSON...
NORTHEASTERN MADISON...SOUTHEASTERN MOORE...SOUTHEASTERN LINCOLN AND
SOUTHWESTERN FRANKLIN COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 3525 8623 3500 8622 3498 8621 3496 8621
3492 8622 3491 8622 3489 8624 3487 8623
3485 8626 3482 8629 3481 8635 3480 8639
3488 8645 3517 8647
TIME...MOT...LOC 2301Z 223DEG 6KT 3493 8635
$$
KTWThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:05 PM CDT | Special Weather Statement | HUN | Jackson | 40 min |
| Aug 11, 3:21 PM CDT | Special Weather Statement | HUN | Madison | 24 min |
| Aug 11, 3:32 PM CDT | Special Weather Statement | HUN | DeKalb | 28 min |
| Aug 11, 3:47 PM CDT | Special Weather Statement | HUN | Marshall | 28 min |
| Aug 11, 3:55 PM CDT | Special Weather Statement | HUN | Jackson | 35 min |
| Aug 11, 4:01 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 29 min |
| Aug 11, 4:07 PM CDT | Special Weather Statement | HUN | Lawrence | 38 min |
| Aug 11, 4:22 PM CDT | Severe Thunderstorm Warning | HUN | Franklin, Lawrence | 23 min |
| Aug 11, 4:35 PM CDT | Special Weather Statement | HUN | Morgan | 40 min |
| Aug 11, 4:43 PM CDT | Special Weather Statement | HUN | Madison | 47 min |
| Aug 11, 5:09 PM CDT | Special Weather Statement | HUN | Madison, Morgan | 21 min |
| Aug 11, 5:17 PM CDT | Special Weather Statement | HUN | Jackson | 28 min |
| Aug 11, 5:21 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 24 min |
| Aug 11, 5:46 PM CDT | Special Weather Statement | HUN | Jackson | 29 min |
| Aug 11, 6:17 PM CDT | Flash Flood Warning | HUN | Jackson, Madison, Marshall, Morgan | 79 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2021Severe 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.