Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 129, NWS Nashville, TN

August 9, 2021Jackson County, Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 9, 2021, 6:16 PM CDT for Jackson County, Smith 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 9, 2021, 6:16 PM CDT (23:16 UTC)
Expired: Aug 9, 2021, 6:45 PM CDT
In force: 29 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jackson County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 69 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 74 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: 788 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

187 
WUUS54 KOHX 092316
SVROHX
TNC087-159-092345-
/O.NEW.KOHX.SV.W.0129.210809T2316Z-210809T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
616 PM CDT Mon Aug 9 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  East central Smith County in Middle Tennessee...
  Southwestern Jackson County in Middle Tennessee...

* Until 645 PM CDT.

* At 616 PM CDT, a severe thunderstorm was located near Carthage,
  moving east at 15 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Carthage and Granville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3623 8572 3623 8574 3625 8578 3622 8578
      3620 8590 3630 8595 3637 8576
TIME...MOT...LOC 2316Z 255DEG 13KT 3625 8588 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Whitehead

1 follow-up statement

812 
WWUS54 KOHX 092340
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
640 PM CDT Mon Aug 9 2021

TNC087-159-092350-
/O.EXP.KOHX.SV.W.0129.000000T0000Z-210809T2345Z/
Smith TN-Jackson TN-
640 PM CDT Mon Aug 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SMITH AND
SOUTHWESTERN JACKSON COUNTIES WILL EXPIRE AT 645 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.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3623 8572 3623 8574 3625 8578 3622 8578
      3620 8590 3630 8595 3637 8576
TIME...MOT...LOC 2340Z 255DEG 13KT 3627 8579 

$$

Whitehead

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 4:38 PM CDT	Special Weather Statement	OHX	Jackson	52 min
Aug 9, 4:48 PM CDT	Special Weather Statement	OHX	Fentress	12 min
Aug 9, 4:49 PM CDT	Special Weather Statement	OHX	Fentress	11 min
Aug 9, 4:57 PM CDT	Special Weather Statement	OHX	Smith	33 min
Aug 9, 5:08 PM CDT	Areal Flood Advisory	OHX	Fentress	112 min
Aug 9, 5:30 PM CDT	Special Weather Statement	OHX	Smith	45 min
Aug 9, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam, Smith	31 min
Aug 9, 5:45 PM CDT	Special Weather Statement	OHX	Cumberland	15 min
Aug 9, 5:50 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	25 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021 Every 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.