Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Morristown, TN

March 18, 2021Lee County, Scott County, Virginia; Claiborne County, Hancock County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Mar 18, 2021, 3:19 PM EDT for Lee County, Scott County, Virginia; Claiborne County, Hancock County, Tennessee. It was in force for 41 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
Mar 18, 2021, 3:19 PM EDT (19:19 UTC)
Expired
Mar 18, 2021, 4:00 PM EDT
In force
41 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Claiborne County, TN, Hancock County, TN, Lee County, VA, Scott County, VA

The radar

The Knoxville radar (KMRX), 63 km from the middle of the area, began a volume at 19:21 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

TimeReportWhereRemark
Mar 18, 3:25 PM EDTHAIL 13 Nne Howard Quarter, TNQUARTER SIZED HAIL NEAR THE CLAIBORNE/HANCOCK COUNTY LINE.
Mar 18, 3:25 PM EDTHAIL 13 Nne Howard Quarter, TNQUARTER SIZED HAIL ESTIMATED AT THE CLAIBORNE/HANCOCK COUNTY LINE.

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, 7.3 hours before the alert went out and 297 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2021-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2021-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 470 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

374 
WUUS54 KMRX 181919
SVRMRX
TNC025-067-VAC105-169-182000-
/O.NEW.KMRX.SV.W.0002.210318T1919Z-210318T2000Z/

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

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Northeastern Claiborne County in east Tennessee...
  Northwestern Hancock County in east Tennessee...
  Lee County in southwestern Virginia...
  Southwestern Scott County in southwestern Virginia...

* Until 400 PM EDT.

* At 319 PM EDT, a severe thunderstorm was located 7 miles northeast
  of Tazewell, or 13 miles west of Sneedville, 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...
  Sneedville, Jonesville, Pennington Gap, St. Charles, Howard
  Quarter, Evanston, Rose Hill, Kyles Ford, Pattonsville and Dryden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 3662 8285 3645 8346 3655 8352 3674 8322
      3674 8314 3675 8313 3678 8313 3685 8302
      3685 8300
TIME...MOT...LOC 1919Z 240DEG 31KT 3651 8345 

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

Garuckas
2 follow-up statements
901 
WWUS54 KMRX 181932
SVSMRX

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

TNC025-VAC169-181942-
/O.CAN.KMRX.SV.W.0002.000000T0000Z-210318T2000Z/
Claiborne TN-Scott VA-
332 PM EDT Thu Mar 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLAIBORNE AND
SOUTHWESTERN SCOTT COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3669 8292 3667 8295 3659 8298 3659 8295
      3652 8321 3650 8334 3658 8339 3682 8299
TIME...MOT...LOC 1932Z 244DEG 31KT 3655 8331 

$$

TNC067-VAC105-182000-
/O.CON.KMRX.SV.W.0002.000000T0000Z-210318T2000Z/
Hancock TN-Lee VA-
332 PM EDT Thu Mar 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHWESTERN HANCOCK AND SOUTHEASTERN LEE COUNTIES...

At 332 PM EDT, a severe thunderstorm was located near Sneedville,
moving northeast at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Sneedville, Jonesville, Pennington Gap, Kyles Ford, Pattonsville and
Dryden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 3669 8292 3667 8295 3659 8298 3659 8295
      3652 8321 3650 8334 3658 8339 3682 8299
TIME...MOT...LOC 1932Z 244DEG 31KT 3655 8331 

HAIL...1.25IN
WIND...60MPH
 
$$

Garuckas
498 
WWUS54 KMRX 181945
SVSMRX

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

TNC067-VAC105-182000-
/O.CON.KMRX.SV.W.0002.000000T0000Z-210318T2000Z/
Hancock TN-Lee VA-
345 PM EDT Thu Mar 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTH CENTRAL HANCOCK AND SOUTHEASTERN LEE COUNTIES...

At 344 PM EDT, a severe thunderstorm was located near Sneedville,
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...
Sneedville, Jonesville, Pennington Gap, Pattonsville and Dryden. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 3655 8322 3663 8327 3672 8316 3681 8301
      3671 8293 3669 8292 3667 8295 3659 8298
      3659 8295 3658 8298
TIME...MOT...LOC 1944Z 240DEG 31KT 3660 8319 

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

Garuckas

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 18, 9:30 AM EDTSpecial Weather StatementMRXLee45 min
Mar 18, 11:15 AM EDTSpecial Weather StatementMRXCity of Bristol45 min
Mar 18, 11:28 AM EDTAreal Flood AdvisoryMRXLee, Wise, City of Norton3 hr
Mar 18, 2:36 PM EDTSevere Thunderstorm WarningMRXLee39 min
Mar 18, 3:13 PM EDTSpecial Weather StatementMRXLee47 min
Mar 18, 4:25 PM EDTSpecial Weather StatementMRXCity of Norton35 min
Mar 18, 4:40 PM EDTSpecial Weather StatementMRXRussell35 min
Mar 18, 5:30 PM EDTSpecial Weather StatementMRXWashington30 min
Mar 18, 5:56 PM EDTSpecial Weather StatementMRXWashington34 min
Mar 18, 7:37 PM EDTSpecial Weather StatementMRXWashington38 min
Mar 18, 7:40 PM EDTAreal Flood AdvisoryMRXScott3 hr
Mar 18, 7:42 PM EDTSevere Thunderstorm WarningMRXWashington26 min
Mar 17, 9:12 PM EDTAreal Flood WarningMRXBradley, Hamilton, Marion6 hr
Mar 18, 9:19 AM EDTSpecial Weather StatementMRXJefferson41 min
Mar 18, 9:54 AM EDTRiver Flood WarningMRXBledsoe, Marion, Sequatchie33 hr
Mar 18, 10:35 AM EDTAreal Flood AdvisoryMRXBlount, Claiborne, Grainger, Hancock, Jefferson, Knox3 hr
Mar 18, 12:59 PM EDTSpecial Weather StatementMRXCampbell46 min
Mar 18, 1:13 PM EDTSpecial Weather StatementMRXAnderson47 min
Mar 18, 1:19 PM EDTSpecial Weather StatementMRXGreene41 min
Mar 18, 1:42 PM EDTSpecial Weather StatementMRXAnderson, Union48 min
Mar 18, 1:52 PM EDTSpecial Weather StatementMRXGreene, Sullivan, Washington53 min
Mar 18, 2:07 PM EDTSpecial Weather StatementMRXClaiborne23 min
Mar 18, 2:12 PM EDTSpecial Weather StatementMRXCampbell48 min
Mar 18, 2:23 PM EDTSpecial Weather StatementMRXClaiborne52 min
Mar 18, 3:02 PM EDTSpecial Weather StatementMRXKnox43 min
Mar 18, 3:12 PM EDTSpecial Weather StatementMRXUnion48 min
Mar 18, 4:02 PM EDTSpecial Weather StatementMRXCampbell43 min
Mar 18, 4:03 PM EDTSpecial Weather StatementMRXClaiborne27 min
Mar 18, 4:14 PM EDTSpecial Weather StatementMRXClaiborne46 min
Mar 18, 4:23 PM EDTSpecial Weather StatementMRXUnicoi37 min
Mar 18, 4:50 PM EDTSpecial Weather StatementMRXCarter25 min
Mar 18, 5:13 PM EDTSpecial Weather StatementMRXJefferson32 min
Mar 18, 6:08 PM EDTSpecial Weather StatementMRXHawkins37 min
Mar 18, 6:41 PM EDTSpecial Weather StatementMRXHawkins34 min
Mar 18, 7:04 PM EDTSpecial Weather StatementMRXCarter26 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2021Severe Thunderstorm Warnings in Tennessee, 2021Every 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.