Alert archive / North Carolina / Tornado Warnings in 2021

Tornado Warning 10, NWS Blacksburg, VA

August 17, 2021Wilkes County, North Carolina

NWS Blacksburg, VA issued this tornado warning at Aug 17, 2021, 1:19 PM EDT for Wilkes County, North Carolina. It was in force for 41 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: Aug 17, 2021, 1:19 PM EDT (17:19 UTC)
Expired: Aug 17, 2021, 2:00 PM EDT
In force: 41 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Wilkes County, NC

The radar

The Roanoke radar (KFCX), 100 km from the middle of the area, began a volume at 17:21 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 17, 1:06 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.3 hours before the alert went out and 104 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: 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.

110 
WFUS51 KRNK 171719
TORRNK
NCC193-171800-
/O.NEW.KRNK.TO.W.0010.210817T1719Z-210817T1800Z/

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

The National Weather Service in BLACKSBURG has issued a

* Tornado Warning for...
  Northeastern Wilkes County in northwestern North Carolina...

* Until 200 PM EDT.
    
* At 118 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Ronda, 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...
  Ronda...
  Traphill...
  Stone Mountain State Park...
  Pleasant Hill...
  Abshers...
  Benham...
  and Doughton Park.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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 3617 8097 3639 8120 3642 8118 3643 8108
      3642 8107 3641 8104 3639 8104 3637 8103
      3637 8099 3640 8096 3637 8092 3629 8087
      3626 8087
TIME...MOT...LOC 1718Z 151DEG 21KT 3624 8097 

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

$$

RAB

2 follow-up statements

708 
WWUS51 KRNK 171744
SVSRNK

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

NCC193-171800-
/O.CON.KRNK.TO.W.0010.000000T0000Z-210817T1800Z/
Wilkes NC-
144 PM EDT Tue Aug 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR 
NORTHEASTERN WILKES COUNTY...
    
At 143 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Traphill, moving northwest at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation. Damage reported from emergency
         management in the Rhonda area.

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...
Traphill...
Stone Mountain State Park...
Abshers...
and Doughton Park.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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 3627 8102 3639 8120 3642 8118 3643 8108
      3642 8107 3641 8104 3639 8104 3637 8103
      3637 8099 3640 8096 3637 8092 3634 8093
      3630 8096
TIME...MOT...LOC 1743Z 151DEG 21KT 3637 8106 

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

$$

RAB

349 
WWUS51 KRNK 171752
SVSRNK

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

NCC193-171800-
/O.CON.KRNK.TO.W.0010.000000T0000Z-210817T1800Z/
Wilkes NC-
152 PM EDT Tue Aug 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR 
NORTHEASTERN WILKES COUNTY...
    
At 150 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Traphill, moving northwest at 15 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation. This storm has had a history of 
         producing tornadoes across eastern Wilkes and western Yadkin
         counties.

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...
Traphill...
and Stone Mountain State Park.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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 3634 8104 3643 8108 3642 8107 3641 8104
      3639 8104 3637 8103 3637 8099 3640 8096
      3639 8094 3635 8097 3633 8099
TIME...MOT...LOC 1750Z 151DEG 14KT 3637 8102 

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

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 3:37 AM EDT	Flash Flood Watch	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes	24 hr
Aug 17, 11:48 AM EDT	Tornado Warning Tornado observed	RNK	Wilkes	42 min
Aug 17, 12:35 PM EDT	Tornado Warning Tornado observed	RNK	Wilkes, Yadkin	40 min
Aug 17, 12:46 PM EDT	Special Weather Statement	RNK	Wilkes	44 min
Aug 17, 1:48 PM EDT	Tornado Warning	RNK	Alleghany, Wilkes	42 min
Aug 17, 1:58 PM EDT	Special Weather Statement	RNK	Alleghany, Caswell, Rockingham, Stokes, Surry, Yadkin	32 min
Aug 17, 2:18 PM EDT	Tornado Warning	RNK	Caswell	32 min
Aug 17, 2:43 PM EDT	Tornado Warning	RNK	Rockingham, Stokes	32 min
Aug 17, 4:35 PM EDT	Special Weather Statement	RNK	Surry	25 min
Aug 17, 5:05 PM EDT	Special Weather Statement	RNK	Alleghany	40 min
Aug 17, 6:50 PM EDT	Special Weather Statement	RNK	Watauga	25 min
Aug 17, 7:13 PM EDT	Flash Flood Warning	RNK	Watauga	8 hr
Aug 17, 7:54 PM EDT	Special Weather Statement	RNK	Ashe	36 min

Nearby

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