Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 108, NWS Nashville, TN

June 21, 2021Cumberland County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 21, 2021, 5:57 PM CDT for Cumberland County, Tennessee. It was in force for 33 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: Jun 21, 2021, 5:57 PM CDT (22:57 UTC)
Expired: Jun 21, 2021, 6:30 PM CDT
In force: 33 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 Northeast Alabama radar (KHTX), 145 km from the middle of the area, began a volume at 23:00 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
Jun 21, 6:04 PM CDT	TSTM WND DMG	3 Ssw Crossville, TN	SEVERAL TREES DOWN ALONG LANTANA RD
Jun 21, 6:17 PM CDT	TSTM WND DMG	Crab Orchard, TN	SEVERAL TREES DOWN IN THE CRAB ORCHARD COMMUNITY

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, 11.0 hours before the alert went out and 146 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: 1530 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

As transmitted.

237 
WUUS54 KOHX 212257
SVROHX
TNC035-212330-
/O.NEW.KOHX.SV.W.0108.210621T2257Z-210621T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
557 PM CDT Mon Jun 21 2021

The National Weather Service in Nashville has issued a

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

* Until 630 PM CDT.

* At 557 PM CDT, a severe thunderstorm was located near Crossville,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Crossville, Fairfield Glade, Crab Orchard, Pleasant Hill, Lake
  Tansi, Cumberland Mountain State Park, Slate Springs and Indian
  Rock Lake.

This includes Interstate 40 between mile markers 306 and 339.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3590 8471 3583 8477 3576 8492 3577 8493
      3575 8502 3577 8504 3576 8507 3577 8525
      3579 8526 3582 8524 3589 8523 3590 8521
      3592 8525 3596 8526 3609 8524 3613 8487
      3608 8483 3609 8483 3600 8472 3591 8468
TIME...MOT...LOC 2257Z 268DEG 35KT 3589 8512 

HAIL...<.75IN
WIND...60MPH
 
$$

10

1 follow-up statement

471 
WWUS54 KOHX 212315
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
615 PM CDT Mon Jun 21 2021

TNC035-212330-
/O.CON.KOHX.SV.W.0108.000000T0000Z-210621T2330Z/
Cumberland TN-
615 PM CDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTHEASTERN CUMBERLAND COUNTY...

At 615 PM CDT, a severe thunderstorm was located 7 miles south of
Fairfield Glade, or 8 miles southeast of Crossville, moving east at
40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Crossville, Fairfield Glade, Crab Orchard, Cumberland Mountain State
Park and Lake Tansi.

This includes Interstate 40 between mile markers 320 and 339.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3590 8471 3583 8477 3576 8492 3577 8493
      3575 8502 3577 8504 3576 8507 3579 8507
      3594 8503 3602 8500 3604 8487 3606 8479
      3600 8472 3591 8468
TIME...MOT...LOC 2315Z 268DEG 35KT 3590 8490 

HAIL...<.75IN
WIND...60MPH
 
$$

10

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 12:18 PM CDT	Special Weather Statement	OHX	Macon	27 min
Jun 21, 12:53 PM CDT	Special Weather Statement	OHX	Stewart	52 min
Jun 21, 1:32 PM CDT	Special Weather Statement	OHX	Robertson	43 min
Jun 21, 1:41 PM CDT	Special Weather Statement	OHX	Dickson, Houston, Montgomery, Stewart	49 min
Jun 21, 1:52 PM CDT	Special Weather Statement	OHX	Clay	23 min
Jun 21, 1:59 PM CDT	Special Weather Statement	OHX	Smith, Wilson	46 min
Jun 21, 2:04 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Wilson	41 min
Jun 21, 2:05 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery	40 min
Jun 21, 2:36 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson	39 min
Jun 21, 2:38 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton, Putnam, Smith	37 min
Jun 21, 3:10 PM CDT	Special Weather Statement	OHX	Davidson, Trousdale, Wilson	50 min
Jun 21, 3:13 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Overton, Pickett	47 min
Jun 21, 3:40 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Overton	35 min
Jun 21, 3:50 PM CDT	Special Weather Statement	OHX	Cumberland	40 min
Jun 21, 4:39 PM CDT	Special Weather Statement	OHX	Cannon, Warren	51 min
Jun 21, 4:44 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Van Buren, Warren, White	46 min
Jun 21, 5:22 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, Warren, White	38 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.