Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS Nashville, TN

October 15, 2021Robertson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Oct 15, 2021, 6:39 PM CDT for Robertson County, Tennessee. It was in force for 36 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
Oct 15, 2021, 6:39 PM CDT (23:39 UTC)
Expired
Oct 15, 2021, 7:15 PM CDT
In force
36 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

County Robertson County, TN

The radar

The Nashville radar (KOHX), 37 km from the middle of the area, began a volume at 23:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 15, 6:05 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 hours before the alert went out and 47 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2021-10-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2021-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
47 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
810 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

874 
WUUS54 KOHX 152339
SVROHX
TNC147-160015-
/O.NEW.KOHX.SV.W.0141.211015T2339Z-211016T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
639 PM CDT Fri Oct 15 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Central Robertson County in Middle Tennessee...

* Until 715 PM CDT.

* At 639 PM CDT, a severe thunderstorm was located near Springfield,
  moving northeast at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Springfield, White House, Greenbrier, Coopertown, Cross Plains,
  Orlinda and Cedar Hill.

This includes Interstate 65 between mile markers 107 and 109.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3645 8667 3645 8668 3641 8698 3662 8703
      3665 8683 3665 8668
TIME...MOT...LOC 2339Z 238DEG 49KT 3654 8688 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

07
1 follow-up statement
125 
WWUS54 KOHX 152351
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
651 PM CDT Fri Oct 15 2021

TNC147-160015-
/O.CON.KOHX.SV.W.0141.000000T0000Z-211016T0015Z/
Robertson TN-
651 PM CDT Fri Oct 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR CENTRAL ROBERTSON COUNTY...

At 651 PM CDT, a severe thunderstorm was located near Springfield,
moving northeast at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Springfield, White House, Greenbrier, Cross Plains and Orlinda. 

This includes Interstate 65 between mile markers 107 and 109.
 
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 3645 8667 3645 8668 3644 8691 3664 8690
      3665 8683 3665 8668
TIME...MOT...LOC 2351Z 244DEG 28KT 3654 8684 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

07

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 15, 4:46 PM CDTSpecial Weather StatementOHXHouston, Stewart44 min
Oct 15, 5:28 PM CDTSpecial Weather StatementOHXHouston, Humphreys, Montgomery, Stewart47 min
Oct 15, 5:45 PM CDTSevere Thunderstorm WarningOHXHouston, Humphreys45 min
Oct 15, 5:56 PM CDTSpecial Weather StatementOHXOverton, Putnam49 min
Oct 15, 6:14 PM CDTSpecial Weather StatementOHXRobertson46 min
Oct 15, 6:21 PM CDTSpecial Weather StatementOHXDickson39 min
Oct 15, 6:31 PM CDTSpecial Weather StatementOHXFentress, Overton, Pickett44 min
Oct 15, 6:33 PM CDTSpecial Weather StatementOHXRobertson27 min
Oct 15, 6:59 PM CDTSpecial Weather StatementOHXSumner46 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.