Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS Morristown, TN

May 28, 2021Carter County, Johnson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 28, 2021, 6:46 PM EDT for Carter County, Johnson County, Tennessee. It was in force for 29 min. 1 report 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: May 28, 2021, 6:46 PM EDT (22:46 UTC)
Expired: May 28, 2021, 7:15 PM EDT
In force: 29 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Carter County, TN, Johnson County, TN

The radar

The Knoxville radar (KMRX), 121 km from the middle of the area, began a volume at 22:46 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
May 28, 6:50 PM EDT	TSTM WND DMG	Hampton, TN	REPORTS OF TREES DOWN AROUND HAMPTON.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.8 hours before the alert went out and 195 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: 106 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1467 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

621 
WUUS54 KMRX 282246
SVRMRX
TNC019-091-282330-
/O.NEW.KMRX.SV.W.0060.210528T2246Z-210528T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
646 PM EDT Fri May 28 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Southwestern Johnson County in east Tennessee...
  Southern Carter County in east Tennessee...

* Until 730 PM EDT.

* At 646 PM EDT, a severe thunderstorm was located over Hampton, or
  near Elizabethton, moving east at 40 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Hampton, Roane Mountain State Park, Elk Mills, Roan Mountain and
  Hampton Creek Cove State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3631 8188 3630 8191 3615 8202 3617 8223
      3619 8223 3621 8225 3629 8226 3634 8185
TIME...MOT...LOC 2246Z 264DEG 33KT 3625 8220 

HAIL...<.75IN
WIND...70MPH
 
$$

JLB

2 follow-up statements

596 
WWUS54 KMRX 282300
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
700 PM EDT Fri May 28 2021

TNC091-282310-
/O.CAN.KMRX.SV.W.0060.000000T0000Z-210528T2330Z/
Johnson TN-
700 PM EDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JOHNSON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3615 8202 3619 8210 3626 8211 3630 8198
      3626 8195 3626 8194
TIME...MOT...LOC 2300Z 264DEG 33KT 3626 8203 

$$

TNC019-282330-
/O.CON.KMRX.SV.W.0060.000000T0000Z-210528T2330Z/
Carter TN-
700 PM EDT Fri May 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN CARTER COUNTY...

At 700 PM EDT, a severe thunderstorm was located 7 miles north of Elk
Park, or 8 miles northwest of Beech Mountain, moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Elk Mills, Roan Mountain and Roane Mountain State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 8202 3619 8210 3626 8211 3630 8198
      3626 8195 3626 8194
TIME...MOT...LOC 2300Z 264DEG 33KT 3626 8203 

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

JLB

289 
WWUS54 KMRX 282315
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
715 PM EDT Fri May 28 2021

TNC019-282325-
/O.CAN.KMRX.SV.W.0060.000000T0000Z-210528T2330Z/
Carter TN-
715 PM EDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARTER COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds are still possible with this
thunderstorm.

LAT...LON 3615 8202 3619 8210 3626 8211 3630 8198
      3626 8195 3626 8194
TIME...MOT...LOC 2315Z 264DEG 33KT 3628 8185 

$$

JLB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 2:44 PM EDT	Special Weather Statement	MRX	Hancock, Hawkins	46 min
May 28, 2:58 PM EDT	Areal Flood Advisory	MRX	Campbell, Morgan, Scott	3 hr
May 28, 3:00 PM EDT	Special Weather Statement	MRX	Grainger	45 min
May 28, 3:08 PM EDT	Special Weather Statement	MRX	Sullivan	37 min
May 28, 3:33 PM EDT	Special Weather Statement	MRX	Campbell, Morgan, Roane, Scott	42 min
May 28, 3:54 PM EDT	Special Weather Statement	MRX	Loudon	36 min
May 28, 3:58 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Morgan, Roane	47 min
May 28, 4:13 PM EDT	Special Weather Statement	MRX	Anderson, Claiborne, Grainger, Knox, Union	47 min
May 28, 4:18 PM EDT	Special Weather Statement	MRX	Monroe	42 min
May 28, 4:32 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Jefferson, Knox, Union	43 min
May 28, 4:56 PM EDT	Special Weather Statement	MRX	Grainger, Hamblen, Jefferson	49 min
May 28, 5:02 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson	43 min
May 28, 5:18 PM EDT	Special Weather Statement	MRX	Greene, Hamblen, Hancock, Hawkins, Jefferson	42 min
May 28, 5:35 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins	40 min
May 28, 5:40 PM EDT	Special Weather Statement	MRX	Monroe, Polk	65 min
May 28, 5:58 PM EDT	Special Weather Statement	MRX	Carter, Sullivan, Washington	62 min
May 28, 6:42 PM EDT	Special Weather Statement	MRX	Carter, Johnson	48 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.