Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Morristown, TN

July 26, 2021Campbell County, Claiborne County, Union County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 26, 2021, 1:40 PM EDT for Campbell County, Claiborne County, Union County, Tennessee. It was in force for 50 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: Jul 26, 2021, 1:40 PM EDT (17:40 UTC)
Expired: Jul 26, 2021, 2:30 PM EDT
In force: 50 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Campbell County, TN, Claiborne County, TN, Union County, TN

The radar

The Knoxville radar (KMRX), 57 km from the middle of the area, began a volume at 17:41 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, 5.7 hours before the alert went out and 241 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: 1186 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

995 
WUUS54 KMRX 261740
SVRMRX
TNC013-025-173-261830-
/O.NEW.KMRX.SV.W.0091.210726T1740Z-210726T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
140 PM EDT Mon Jul 26 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Southwestern Claiborne County in east Tennessee...
  Northeastern Campbell County in east Tennessee...
  Northwestern Union County in east Tennessee...

* Until 230 PM EDT.

* At 139 PM EDT, a severe thunderstorm was located 8 miles south of
  Wilkerson, or 10 miles northeast of La Follette, moving southeast
  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...
  Fincastle, Clairfield and Sharps Chapel. 

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3643 8409 3658 8397 3648 8367 3626 8387
TIME...MOT...LOC 1739Z 311DEG 18KT 3647 8398 

HAIL...0.75IN
WIND...60MPH
 
$$

Garuckas

2 follow-up statements

596 
WWUS54 KMRX 261753
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
153 PM EDT Mon Jul 26 2021

TNC013-025-173-261830-
/O.CON.KMRX.SV.W.0091.000000T0000Z-210726T1830Z/
Claiborne TN-Campbell TN-Union TN-
153 PM EDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTHWESTERN CLAIBORNE...EAST CENTRAL CAMPBELL AND NORTHWESTERN
UNION COUNTIES...

At 152 PM EDT, a severe thunderstorm was located 11 miles south of
Pruden, or 12 miles east of La Follette, moving southeast 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...
Fincastle, Clairfield, Sharps Chapel and Big Ridge State Park. 

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3642 8408 3657 8394 3648 8367 3626 8387
TIME...MOT...LOC 1752Z 311DEG 18KT 3642 8391 

HAIL...0.75IN
WIND...60MPH
 
$$

Garuckas

714 
WWUS54 KMRX 261822
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
222 PM EDT Mon Jul 26 2021

TNC013-025-173-261832-
/O.EXP.KMRX.SV.W.0091.000000T0000Z-210726T1830Z/
Claiborne TN-Campbell TN-Union TN-
222 PM EDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CLAIBORNE...EAST
CENTRAL CAMPBELL AND NORTHWESTERN UNION COUNTIES WILL EXPIRE AT 230
PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with this thunderstorm.

LAT...LON 3642 8408 3657 8394 3648 8367 3626 8387
TIME...MOT...LOC 1822Z 311DEG 18KT 3634 8379 

$$

Garuckas

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 8:08 PM EDT	Areal Flood Advisory	MRX	Sequatchie	52 min
Jul 26, 1:14 PM EDT	Special Weather Statement	MRX	Claiborne, Hancock, Hawkins	46 min
Jul 26, 1:26 PM EDT	Special Weather Statement	MRX	Campbell	49 min
Jul 26, 2:05 PM EDT	Special Weather Statement	MRX	Anderson, Campbell	40 min
Jul 26, 2:10 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen	50 min
Jul 26, 2:45 PM EDT	Special Weather Statement	MRX	Sevier	45 min
Jul 26, 2:47 PM EDT	Special Weather Statement	MRX	Anderson, Knox	43 min
Jul 26, 3:07 PM EDT	Special Weather Statement	MRX	Cocke	38 min
Jul 26, 3:45 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	45 min
Jul 26, 3:54 PM EDT	Special Weather Statement	MRX	Rhea	51 min
Jul 26, 4:07 PM EDT	Special Weather Statement	MRX	Scott	38 min
Jul 26, 4:25 PM EDT	Special Weather Statement	MRX	Marion	50 min
Jul 26, 4:27 PM EDT	Special Weather Statement	MRX	Meigs, Rhea	48 min
Jul 26, 4:37 PM EDT	Flash Flood Warning	MRX	Bledsoe, Bradley, Hamilton, McMinn, Meigs, Rhea	68 min
Jul 26, 4:57 PM EDT	Special Weather Statement	MRX	McMinn	48 min
Jul 26, 5:38 PM EDT	Special Weather Statement	MRX	Hamilton	52 min
Jul 26, 5:45 PM EDT	Special Weather Statement	MRX	Polk	45 min
Jul 26, 6:24 PM EDT	Special Weather Statement	MRX	Rhea	51 min
Jul 26, 7:29 PM EDT	Special Weather Statement	MRX	Sequatchie	31 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.