Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 134, NWS Nashville, TN

August 25, 2021Robertson County, Sumner County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 25, 2021, 6:03 PM CDT for Robertson County, Sumner County, Tennessee. It was in force for 27 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 25, 2021, 6:03 PM CDT (23:03 UTC)
Expired: Aug 25, 2021, 6:30 PM CDT
In force: 27 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Robertson County, TN, Sumner County, TN

The radar

The Nashville radar (KOHX), 41 km from the middle of the area, began a volume at 23:04 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, 11.1 hours before the alert went out and 54 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: 729 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

765 
WUUS54 KOHX 252303
SVROHX
TNC147-165-252330-
/O.NEW.KOHX.SV.W.0134.210825T2303Z-210825T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
603 PM CDT Wed Aug 25 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sumner County in Middle Tennessee...
  Northeastern Robertson County in Middle Tennessee...

* Until 630 PM CDT.

* At 603 PM CDT, a severe thunderstorm was located near Portland, or
  16 miles northeast of Springfield, moving southwest at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Cross Plains, Orlinda, Mitchellville and Black Jack. 

This includes Interstate 65 between mile markers 112 and 120.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3665 8659 3663 8657 3664 8655 3664 8654
      3662 8653 3649 8658 3654 8679 3665 8670
TIME...MOT...LOC 2303Z 029DEG 6KT 3661 8661 

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

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 5:28 PM CDT	Special Weather Statement	OHX	Williamson	32 min
Aug 25, 5:36 PM CDT	Special Weather Statement	OHX	Wilson	24 min
Aug 25, 5:53 PM CDT	Special Weather Statement	OHX	Trousdale	37 min
Aug 25, 6:08 PM CDT	Special Weather Statement	OHX	Williamson	37 min
Aug 25, 6:28 PM CDT	Special Weather Statement	OHX	Robertson	47 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.