Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Aug 30, 2021, 2:01 PM CDT for Franklin County, Tennessee. It was in force for 29 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 30, 2021, 2:01 PM CDT (19:01 UTC)
- Expired
- Aug 30, 2021, 2:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Franklin County, TN
The radar
The Northeast Alabama radar (KHTX), 16 km from the middle of the area, began a volume at 19:04 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, 7.0 hours before the alert went out and 131 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
- 437 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1082 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
383
WUUS54 KHUN 301901
SVRHUN
TNC051-301930-
/O.NEW.KHUN.SV.W.0084.210830T1901Z-210830T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Huntsville AL
201 PM CDT Mon Aug 30 2021
The National Weather Service in Huntsville Alabama has issued a
* Severe Thunderstorm Warning for...
Southeastern Franklin County in Middle Tennessee...
* Until 230 PM CDT.
* At 201 PM CDT, a severe thunderstorm was located near Cowan, or 9
miles southeast of Winchester, moving north at 10 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Winchester, Cowan, Sewanee, Belvidere and Sherwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3501 8589 3499 8601 3499 8611 3515 8620
3521 8592
TIME...MOT...LOC 1901Z 167DEG 10KT 3507 8602
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
McCoy2 follow-up statements
847
WWUS54 KHUN 301921
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
221 PM CDT Mon Aug 30 2021
TNC051-301930-
/O.CON.KHUN.SV.W.0084.000000T0000Z-210830T1930Z/
Franklin TN-
221 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR SOUTHEASTERN FRANKLIN COUNTY...
At 221 PM CDT, a severe thunderstorm was located near Cowan, or near
Winchester, moving north at 10 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Winchester, Cowan, Sewanee, Belvidere and Sherwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3504 8590 3502 8600 3501 8612 3515 8620
3521 8592
TIME...MOT...LOC 1921Z 167DEG 10KT 3512 8604
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
McCoy957
WWUS54 KHUN 301928
SVSHUN
Severe Weather Statement
National Weather Service Huntsville AL
228 PM CDT Mon Aug 30 2021
TNC051-301938-
/O.EXP.KHUN.SV.W.0084.000000T0000Z-210830T1930Z/
Franklin TN-
228 PM CDT Mon Aug 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FRANKLIN COUNTY
WILL EXPIRE AT 230 PM CDT...
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 will be allowed to expire.
LAT...LON 3504 8590 3502 8600 3501 8612 3515 8620
3521 8592
TIME...MOT...LOC 1928Z 167DEG 10KT 3512 8604
$$
McCoyThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 1:47 PM CDT | Special Weather Statement | HUN | Franklin | 43 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 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.