Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 130, NWS Nashville, TN

August 11, 2021Bedford County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 11, 2021, 7:10 PM CDT for Bedford County, Tennessee. It was in force for 35 min. 1 report 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 11, 2021, 7:10 PM CDT (00:10 UTC)
Expired: Aug 11, 2021, 7:45 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Bedford County, TN

The radar

The Nashville radar (KOHX), 74 km from the middle of the area, began a volume at 00:10 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 11, 7:16 PM CDT	HAIL 1	3 N Bell Buckle, TN	TSPOTTER REPORT OF QUARTER SIZE HAIL IN BELL BUCKLE OFF OF LIBERTY PIKE AND BEECHWOOD ROAD.

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 00:00Z, 0.2 hours before the alert went out and 63 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: 1818 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1707 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

459 
WUUS54 KOHX 120010
SVROHX
TNC003-120045-
/O.NEW.KOHX.SV.W.0130.210812T0010Z-210812T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
710 PM CDT Wed Aug 11 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bedford County in Middle Tennessee...

* Until 745 PM CDT.

* At 710 PM CDT, a severe thunderstorm was located 9 miles northeast
  of Shelbyville, moving northeast at 5 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wartrace, Bell Buckle and Beechgrove. 

This includes Interstate 24 between mile markers 97 and 98.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3548 8637 3562 8642 3562 8640 3563 8639
      3563 8637 3564 8638 3566 8632 3565 8630
      3565 8628 3563 8624 3556 8624
TIME...MOT...LOC 0010Z 237DEG 5KT 3558 8633 

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

$$

Whitehead

1 follow-up statement

434 
WWUS54 KOHX 120036
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
736 PM CDT Wed Aug 11 2021

TNC003-120045-
/O.CON.KOHX.SV.W.0130.000000T0000Z-210812T0045Z/
Bedford TN-
736 PM CDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHEASTERN BEDFORD COUNTY...

At 736 PM CDT, a severe thunderstorm was located 11 miles northeast
of Shelbyville, moving northeast at 5 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Bell Buckle and Beechgrove. 

This includes Interstate 24 between mile markers 97 and 98.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3554 8637 3562 8642 3562 8640 3563 8639
      3563 8637 3564 8638 3566 8632 3565 8630
      3565 8628 3563 8624 3556 8624
TIME...MOT...LOC 0036Z 237DEG 5KT 3560 8629 

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

$$

Whitehead

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 4:21 PM CDT	Special Weather Statement	OHX	Fentress	39 min
Aug 12, 4:30 PM CDT	Special Weather Statement	OHX	Smith	30 min
Aug 12, 4:49 PM CDT	Areal Flood Advisory	OHX	Fentress	116 min
Aug 12, 5:03 PM CDT	Special Weather Statement	OHX	Smith	42 min
Aug 12, 5:25 PM CDT	Special Weather Statement	OHX	Wilson	50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.