Alert archive / North Carolina / Tornado Warnings in 2021

Tornado Warning 13, NWS Blacksburg, VA

August 17, 2021Rockingham County, Stokes County, North Carolina; Henry County, Patrick County, Virginia

NWS Blacksburg, VA issued this tornado warning at Aug 17, 2021, 2:43 PM EDT for Rockingham County, Stokes County, North Carolina; Henry County, Patrick County, Virginia. It was in force for 32 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
Aug 17, 2021, 2:43 PM EDT (18:43 UTC)
Expired
Aug 17, 2021, 3:15 PM EDT
In force
32 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Rockingham County, NC, Stokes County, NC, Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 38 km from the middle of the area, began a volume at 18:44 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
Aug 17, 2:59 PM EDTTSTM WND DMG2 Ne Critz, VAA TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS NEAR THE INTERSECTION OF TRENTS ORCHARD ROAD AND ABRAM PENN HIGHWAY.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 17, 1:06 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.7 hours before the alert went out and 73 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 2021-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 522 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 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
522 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

976 
WFUS51 KRNK 171843
TORRNK
NCC157-169-VAC089-141-171915-
/O.NEW.KRNK.TO.W.0013.210817T1843Z-210817T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service BLACKSBURG VA
243 PM EDT Tue Aug 17 2021

The National Weather Service in BLACKSBURG has issued a

* Tornado Warning for...
  Northeastern Stokes County in north central North Carolina...
  Northwestern Rockingham County in north central North Carolina...
  Southwestern Henry County in south central Virginia...
  Southeastern Patrick County in southwestern Virginia...

* Until 315 PM EDT.
    
* At 243 PM EDT, a shower capable of producing a tornado was located 
  near Ayersville, or near Sandy Ridge, moving north at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Spencer...
  Sandy Ridge...
  Sanville...
  Penns Store...
  Fairy Stone State Park...
  Critz...
  and Buffalo Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3674 8034 3683 8007 3680 8004 3679 8004
      3679 8003 3678 8002 3648 7998 3646 8007
TIME...MOT...LOC 1843Z 158DEG 23KT 3653 8006 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

RR
1 follow-up statement
856 
WWUS51 KRNK 171902
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
302 PM EDT Tue Aug 17 2021

NCC157-169-VAC089-171911-
/O.CAN.KRNK.TO.W.0013.000000T0000Z-210817T1915Z/
Stokes NC-Rockingham NC-Henry VA-
302 PM EDT Tue Aug 17 2021

...THE TORNADO WARNING FOR 
NORTHEASTERN STOKES...NORTHWESTERN ROCKINGHAM AND SOUTHWESTERN HENRY
COUNTIES IS CANCELLED...
    
The tornadic shower which prompted the warning has moved out of the 
warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 PM EDT for north central
and northwestern North Carolina...and south central, southwestern and
west central Virginia.

LAT...LON 3670 8030 3674 8034 3682 8011 3676 8009
      3672 8009 3670 8008 3668 8008 3666 8006
      3660 8005 3657 8013
TIME...MOT...LOC 1901Z 152DEG 24KT 3664 8012 

$$

VAC141-171915-
/O.CON.KRNK.TO.W.0013.000000T0000Z-210817T1915Z/
Patrick VA-
302 PM EDT Tue Aug 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR 
SOUTHEASTERN PATRICK COUNTY...
    
At 301 PM EDT, a shower capable of producing a tornado was located 
over Critz, or near Spencer, moving northwest at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Patrick Springs...
Penns Store...
Critz...
and Buffalo Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3670 8030 3674 8034 3682 8011 3676 8009
      3672 8009 3670 8008 3668 8008 3666 8006
      3660 8005 3657 8013
TIME...MOT...LOC 1901Z 152DEG 24KT 3664 8012 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

RR

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 3:37 AM EDTFlash Flood WatchRNKAlleghany, Ashe, Surry, Watauga, Wilkes24 hr
Aug 17, 11:48 AM EDTTornado Warning Tornado observedRNKWilkes42 min
Aug 17, 12:35 PM EDTTornado Warning Tornado observedRNKWilkes, Yadkin40 min
Aug 17, 12:46 PM EDTSpecial Weather StatementRNKWilkes44 min
Aug 17, 1:19 PM EDTTornado WarningRNKWilkes41 min
Aug 17, 1:48 PM EDTTornado WarningRNKAlleghany, Wilkes42 min
Aug 17, 1:58 PM EDTSpecial Weather StatementRNKAlleghany, Caswell, Rockingham, Stokes, Surry, Yadkin32 min
Aug 17, 2:18 PM EDTTornado WarningRNKCaswell32 min
Aug 17, 4:35 PM EDTSpecial Weather StatementRNKSurry25 min
Aug 17, 5:05 PM EDTSpecial Weather StatementRNKAlleghany40 min
Aug 17, 6:50 PM EDTSpecial Weather StatementRNKWatauga25 min
Aug 17, 7:13 PM EDTFlash Flood WarningRNKWatauga8 hr
Aug 17, 7:54 PM EDTSpecial Weather StatementRNKAshe36 min
Aug 16, 8:10 PM EDTSpecial Weather StatementRNKBedford, Campbell, Charlotte, City of Lynchburg65 min
Aug 16, 8:45 PM EDTAreal Flood AdvisoryRNKBland, Tazewell2 hr
Aug 16, 9:14 PM EDTSpecial Weather StatementRNKAmherst, Appomattox, Buckingham46 min
Aug 17, 9:32 AM EDTAreal Flood AdvisoryRNKCarroll5 hr
Aug 17, 2:27 PM EDTSpecial Weather StatementRNKGrayson48 min
Aug 17, 2:53 PM EDTFlood WatchRNKAlleghany, Amherst, Bath, Bedford, Botetourt, Craig and 12 more12 min
Aug 17, 3:17 PM EDTTornado WarningRNKFranklin, Henry, Patrick28 min
Aug 17, 3:18 PM EDTTornado WarningRNKFranklin, Henry, City of Martinsville27 min
Aug 17, 3:20 PM EDTSpecial Weather StatementRNKCarroll, Floyd, Franklin, Montgomery, Patrick, Pittsylvania and 3 more40 min
Aug 17, 3:41 PM EDTTornado WarningRNKFranklin, Henry, Patrick34 min
Aug 17, 3:58 PM EDTSpecial Weather StatementRNKBedford, Craig, Giles, Montgomery, Roanoke, City of Roanoke and 1 more47 min
Aug 17, 4:09 PM EDTAreal Flood AdvisoryRNKCity of Roanoke, City of Salem3 hr
Aug 17, 4:20 PM EDTSpecial Weather StatementRNKHenry, Patrick, City of Martinsville40 min
Aug 17, 4:45 PM EDTSpecial Weather StatementRNKBedford, Botetourt, Craig, Roanoke, City of Roanoke, City of Salem45 min
Aug 17, 5:23 PM EDTSpecial Weather StatementRNKAppomattox, Buckingham52 min
Aug 17, 5:34 PM EDTTornado WarningRNKBedford, Campbell, City of Lynchburg26 min
Aug 17, 6:05 PM EDTSpecial Weather StatementRNKAmherst, City of Lynchburg40 min
Aug 17, 6:45 PM EDTSpecial Weather StatementRNKCity of Lynchburg45 min
Aug 17, 7:42 PM EDTAreal Flood AdvisoryRNKAmherst79 min

Nearby

Tornado Warnings in North Carolina, 2021Tornado Warnings in Virginia, 2021Every tornado warning in 2021Tornadoes 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.