Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Nashville, TN

August 13, 20214 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 13, 2021, 2:51 PM CDT for 4 counties in Tennessee. It was in force for 39 min. 2 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: Aug 13, 2021, 2:51 PM CDT (19:51 UTC)
Expired: Aug 13, 2021, 3:30 PM CDT
In force: 39 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cheatham County, TN, Dickson County, TN, Hickman County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 64 km from the middle of the area, began a volume at 19:54 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
Aug 13, 3:00 PM CDT	TSTM WND DMG	5 Se Dickson, TN	SEVERAL TREES WERE BLOWN DOWN IN THE PORTER COMMUNITY.
Aug 13, 3:00 PM CDT	TSTM WND DMG	5 Se Dickson, TN	SEVERAL TREES WERE BLOWN DOWN IN THE PORTER COMMUNITY. A BARN WAS BLOWN DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 56 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: 1072 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

534 
WUUS54 KOHX 131951
SVROHX
TNC021-043-081-187-132030-
/O.NEW.KOHX.SV.W.0132.210813T1951Z-210813T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
251 PM CDT Fri Aug 13 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southeastern Dickson County in Middle Tennessee...
  Northwestern Williamson County in Middle Tennessee...
  Southern Cheatham County in Middle Tennessee...
  Northeastern Hickman County in Middle Tennessee...

* Until 330 PM CDT.

* At 251 PM CDT, a severe thunderstorm was located near Burns, or 9
  miles southeast of Dickson, moving northeast at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Dickson, White Bluff, Kingston Springs, Burns and Fairview. 

This includes the following highways...
 Interstate 40 between mile markers 172 and 187.
 Interstate 840 between mile markers 1 and 9.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3588 8724 3601 8737 3614 8719 3608 8710
      3595 8706
TIME...MOT...LOC 1951Z 233DEG 6KT 3598 8724 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 12:16 PM CDT	Special Weather Statement	OHX	Marshall	44 min
Aug 13, 12:37 PM CDT	Special Weather Statement	OHX	Giles	53 min
Aug 13, 12:57 PM CDT	Special Weather Statement	OHX	Rutherford	48 min
Aug 13, 1:05 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	25 min
Aug 13, 1:20 PM CDT	Special Weather Statement	OHX	Williamson	25 min
Aug 13, 1:31 PM CDT	Special Weather Statement	OHX	Wilson	29 min
Aug 13, 1:40 PM CDT	Special Weather Statement	OHX	Williamson	50 min
Aug 13, 2:03 PM CDT	Areal Flood Advisory	OHX	Williamson	117 min
Aug 13, 2:38 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	2 hr
Aug 13, 2:47 PM CDT	Areal Flood Advisory	OHX	Davidson	118 min
Aug 13, 2:53 PM CDT	Areal Flood Advisory	OHX	Hickman, Humphreys, Perry	2 hr
Aug 13, 2:56 PM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Williamson	2 hr
Aug 13, 3:24 PM CDT	Special Weather Statement	OHX	Hickman, Lewis, Perry	51 min
Aug 13, 3:28 PM CDT	Flash Flood Warning	OHX	Hickman, Humphreys, Perry	2 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.