Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 128, NWS Nashville, TN

August 9, 2021Cumberland County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 9, 2021, 5:50 PM CDT for Cumberland County, Tennessee. It was in force for 25 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, 5:50 PM CDT (22:50 UTC)
Expired: Aug 9, 2021, 6:15 PM CDT
In force: 25 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cumberland County, TN

The radar

The Knoxville radar (KMRX), 131 km from the middle of the area, began a volume at 22:53 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, 10.8 hours before the alert went out and 157 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.

830 
WUUS54 KOHX 092250
SVROHX
TNC035-092315-
/O.NEW.KOHX.SV.W.0128.210809T2250Z-210809T2315Z/

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

The National Weather Service in Nashville has issued a

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

* Until 615 PM CDT.

* At 550 PM CDT, a severe thunderstorm was located near Fairfield
  Glade, or 11 miles northeast of Crossville, moving east at 20 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Fairfield Glade and Slate Springs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3597 8497 3615 8497 3615 8493 3616 8491
      3613 8487 3608 8483 3610 8482 3609 8481
      3605 8479 3600 8472 3593 8469
TIME...MOT...LOC 2250Z 270DEG 17KT 3606 8488 

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

$$

FB

1 follow-up statement

875 
WWUS54 KOHX 092307
SVSOHX

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

TNC035-092315-
/O.CON.KOHX.SV.W.0128.000000T0000Z-210809T2315Z/
Cumberland TN-
607 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN CUMBERLAND COUNTY...

At 607 PM CDT, a severe thunderstorm was located near Fairfield
Glade, or 11 miles west of Wartburg, moving east at 20 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Fairfield Glade.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3598 8487 3612 8496 3615 8493 3616 8491
      3613 8487 3608 8483 3610 8482 3609 8481
      3605 8479 3600 8472 3593 8469
TIME...MOT...LOC 2307Z 270DEG 17KT 3606 8478 

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

$$

FB

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, 6:16 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Smith	29 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.