Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 166, NWS Blacksburg, VA

August 12, 2021Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 12, 2021, 4:27 PM EDT for Yadkin County, North Carolina. It was in force for 37 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 12, 2021, 4:27 PM EDT (20:27 UTC)
Expired: Aug 12, 2021, 5:04 PM EDT
In force: 37 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Yadkin County, NC

The radar

The Roanoke radar (KFCX), 105 km from the middle of the area, began a volume at 20:27 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
Aug 12, 4:45 PM EDT	TSTM WND DMG	Courtney, NC	SEVERAL TREES DOWN.

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, 8.5 hours before the alert went out and 57 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: 1015 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

287 
WUUS51 KRNK 122027
SVRRNK
NCC197-122130-
/O.NEW.KRNK.SV.W.0166.210812T2027Z-210812T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
427 PM EDT Thu Aug 12 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Southeastern Yadkin County in northwestern North Carolina...

* Until 530 PM EDT.

* At 427 PM EDT, a severe thunderstorm was located over Shacktown, or
  near Yadkinville, and is nearly stationary.

  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...
  Enon...
  Courtney...
  Huntsville...
  and Shacktown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

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 3605 8066 3616 8062 3619 8044 3614 8044
      3612 8045 3611 8050 3609 8052 3605 8050
TIME...MOT...LOC 2027Z 269DEG 4KT 3611 8056 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SH

2 follow-up statements

498 
WWUS51 KRNK 122039
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
439 PM EDT Thu Aug 12 2021

NCC197-122130-
/O.CON.KRNK.SV.W.0166.000000T0000Z-210812T2130Z/
Yadkin NC-
439 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN YADKIN COUNTY...

At 439 PM EDT, a severe thunderstorm was located over Huntsville, or
near Yadkinville, and is nearly stationary.

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...
Enon...
Courtney...
Huntsville...
and Shacktown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.

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 3605 8066 3616 8062 3619 8044 3614 8044
      3612 8045 3611 8050 3609 8052 3605 8050
TIME...MOT...LOC 2039Z 269DEG 4KT 3611 8054 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ET

637 
WWUS51 KRNK 122104
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
504 PM EDT Thu Aug 12 2021

NCC197-122114-
/O.CAN.KRNK.SV.W.0166.000000T0000Z-210812T2130Z/
Yadkin NC-
504 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHEASTERN YADKIN COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 3605 8066 3616 8062 3619 8044 3614 8044
      3612 8045 3611 8050 3609 8052 3605 8050
TIME...MOT...LOC 2102Z 269DEG 4KT 3611 8051 

$$

SH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 12:57 PM EDT	Special Weather Statement	RNK	Alleghany	33 min
Aug 12, 1:22 PM EDT	Special Weather Statement	RNK	Wilkes	23 min
Aug 12, 1:35 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	55 min
Aug 12, 1:45 PM EDT	Special Weather Statement	RNK	Watauga	30 min
Aug 12, 2:18 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes, Yadkin	57 min
Aug 12, 2:27 PM EDT	Areal Flood Advisory	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes	3 hr
Aug 12, 2:57 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	51 min
Aug 12, 3:11 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	53 min
Aug 12, 3:24 PM EDT	Special Weather Statement	RNK	Surry	36 min
Aug 12, 3:31 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	14 min
Aug 12, 3:46 PM EDT	Special Weather Statement	RNK	Ashe	29 min
Aug 12, 3:53 PM EDT	Special Weather Statement	RNK	Rockingham	37 min
Aug 12, 3:58 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	47 min
Aug 12, 4:03 PM EDT	Areal Flood Advisory	RNK	Ashe, Wilkes	3 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 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.