Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Morristown, TN

March 18, 2021Washington County, Virginia; Johnson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Mar 18, 2021, 7:42 PM EDT for Washington County, Virginia; Johnson County, Tennessee. It was in force for 26 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: Mar 18, 2021, 7:42 PM EDT (23:42 UTC)
Expired: Mar 18, 2021, 8:08 PM EDT
In force: 26 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, TN, Washington County, VA

The radar

The Roanoke radar (KFCX), 145 km from the middle of the area, began a volume at 23:45 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.7 hours before the alert went out and 182 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 470 m²/s²
0-3 km storm-relative helicity: 562 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

215 
WUUS54 KMRX 182342
SVRMRX
TNC091-VAC191-190030-
/O.NEW.KMRX.SV.W.0003.210318T2342Z-210319T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
742 PM EDT Thu Mar 18 2021

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Northeastern Johnson County in east Tennessee...
  Southeastern Washington County in southwestern Virginia...

* Until 830 PM EDT.

* At 742 PM EDT, a severe thunderstorm was located 9 miles south of
  Abingdon, moving northeast at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Damascus and Konnarock. 

This includes Interstate 81 in Virginia between mile markers 32 and
33.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3662 8161 3661 8165 3660 8167 3651 8188
      3655 8194 3657 8193 3658 8188 3660 8187
      3661 8183 3662 8192 3659 8194 3660 8200
      3662 8204 3680 8171 3664 8161
TIME...MOT...LOC 2342Z 240DEG 31KT 3658 8191 

HAIL...1.00IN
WIND...60MPH
 
$$

JLB

2 follow-up statements

943 
WWUS54 KMRX 182351
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
751 PM EDT Thu Mar 18 2021

TNC091-VAC191-190030-
/O.CON.KMRX.SV.W.0003.000000T0000Z-210319T0030Z/
Johnson TN-Washington VA-
751 PM EDT Thu Mar 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHEASTERN JOHNSON AND SOUTHEASTERN WASHINGTON COUNTIES...

At 750 PM EDT, a severe thunderstorm was located 10 miles southeast
of Abingdon, moving northeast at 35 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Damascus, Laurel Bloomery and Konnarock. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3662 8161 3661 8165 3660 8167 3654 8180
      3660 8186 3661 8183 3661 8187 3664 8189
      3678 8170 3664 8161
TIME...MOT...LOC 2350Z 240DEG 31KT 3662 8183 

HAIL...1.00IN
WIND...60MPH
 
$$

JLB

833 
WWUS54 KMRX 190008
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
808 PM EDT Thu Mar 18 2021

TNC091-VAC191-190018-
/O.CAN.KMRX.SV.W.0003.000000T0000Z-210319T0030Z/
Johnson TN-Washington VA-
808 PM EDT Thu Mar 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JOHNSON AND
SOUTHEASTERN WASHINGTON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail, gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3662 8161 3661 8165 3660 8167 3654 8180
      3660 8186 3661 8183 3661 8187 3664 8189
      3678 8170 3664 8161
TIME...MOT...LOC 0005Z 240DEG 31KT 3670 8166 

$$

JLB

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 9:30 AM EDT	Special Weather Statement	MRX	Lee	45 min
Mar 18, 11:15 AM EDT	Special Weather Statement	MRX	City of Bristol	45 min
Mar 18, 11:28 AM EDT	Areal Flood Advisory	MRX	Lee, Wise, City of Norton	3 hr
Mar 18, 2:36 PM EDT	Severe Thunderstorm Warning	MRX	Lee	39 min
Mar 18, 3:13 PM EDT	Special Weather Statement	MRX	Lee	47 min
Mar 18, 3:19 PM EDT	Severe Thunderstorm Warning	MRX	Lee, Scott	41 min
Mar 18, 4:25 PM EDT	Special Weather Statement	MRX	City of Norton	35 min
Mar 18, 4:40 PM EDT	Special Weather Statement	MRX	Russell	35 min
Mar 18, 5:30 PM EDT	Special Weather Statement	MRX	Washington	30 min
Mar 18, 5:56 PM EDT	Special Weather Statement	MRX	Washington	34 min
Mar 18, 7:37 PM EDT	Special Weather Statement	MRX	Washington	38 min
Mar 18, 7:40 PM EDT	Areal Flood Advisory	MRX	Scott	3 hr
Mar 17, 9:12 PM EDT	Areal Flood Warning	MRX	Bradley, Hamilton, Marion	6 hr
Mar 18, 9:19 AM EDT	Special Weather Statement	MRX	Jefferson	41 min
Mar 18, 9:54 AM EDT	River Flood Warning	MRX	Bledsoe, Marion, Sequatchie	33 hr
Mar 18, 10:35 AM EDT	Areal Flood Advisory	MRX	Blount, Claiborne, Grainger, Hancock, Jefferson, Knox	3 hr
Mar 18, 12:59 PM EDT	Special Weather Statement	MRX	Campbell	46 min
Mar 18, 1:13 PM EDT	Special Weather Statement	MRX	Anderson	47 min
Mar 18, 1:19 PM EDT	Special Weather Statement	MRX	Greene	41 min
Mar 18, 1:42 PM EDT	Special Weather Statement	MRX	Anderson, Union	48 min
Mar 18, 1:52 PM EDT	Special Weather Statement	MRX	Greene, Sullivan, Washington	53 min
Mar 18, 2:07 PM EDT	Special Weather Statement	MRX	Claiborne	23 min
Mar 18, 2:12 PM EDT	Special Weather Statement	MRX	Campbell	48 min
Mar 18, 2:23 PM EDT	Special Weather Statement	MRX	Claiborne	52 min
Mar 18, 3:02 PM EDT	Special Weather Statement	MRX	Knox	43 min
Mar 18, 3:12 PM EDT	Special Weather Statement	MRX	Union	48 min
Mar 18, 4:02 PM EDT	Special Weather Statement	MRX	Campbell	43 min
Mar 18, 4:03 PM EDT	Special Weather Statement	MRX	Claiborne	27 min
Mar 18, 4:14 PM EDT	Special Weather Statement	MRX	Claiborne	46 min
Mar 18, 4:23 PM EDT	Special Weather Statement	MRX	Unicoi	37 min
Mar 18, 4:50 PM EDT	Special Weather Statement	MRX	Carter	25 min
Mar 18, 5:13 PM EDT	Special Weather Statement	MRX	Jefferson	32 min
Mar 18, 6:08 PM EDT	Special Weather Statement	MRX	Hawkins	37 min
Mar 18, 6:41 PM EDT	Special Weather Statement	MRX	Hawkins	34 min
Mar 18, 7:04 PM EDT	Special Weather Statement	MRX	Carter	26 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2021 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.