Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 149, NWS Blacksburg, VA

August 11, 2021Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 11, 2021, 3:46 PM EDT for Yadkin County, North Carolina. It was in force for 47 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 11, 2021, 3:46 PM EDT (19:46 UTC)
Expired: Aug 11, 2021, 4:33 PM EDT
In force: 47 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Yadkin County, NC

The radar

The Roanoke radar (KFCX), 94 km from the middle of the area, began a volume at 19:45 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.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 4:15 PM EDT	TSTM WND DMG	East Bend, NC	SEVERAL TREES DOWN AROUND THE EAST BEND AREA. TIME ESTIMATED FROM RADAR.

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, 7.8 hours before the alert went out and 63 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: 653 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1352 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

400 
WUUS51 KRNK 111946
SVRRNK
NCC197-112045-
/O.NEW.KRNK.SV.W.0149.210811T1946Z-210811T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
346 PM EDT Wed Aug 11 2021

The National Weather Service in BLACKSBURG has issued a

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

* Until 445 PM EDT.

* At 346 PM EDT, a severe thunderstorm was located over Nebo, 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...
  Yadkinville...
  East Bend...
  Nebo...
  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 3621 8069 3628 8057 3628 8054 3626 8053
      3626 8051 3613 8047 3611 8066
TIME...MOT...LOC 1946Z 255DEG 4KT 3620 8061 

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

$$

SH

2 follow-up statements

911 
WWUS51 KRNK 112002
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
402 PM EDT Wed Aug 11 2021

NCC197-112045-
/O.CON.KRNK.SV.W.0149.000000T0000Z-210811T2045Z/
Yadkin NC-
402 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR
NORTHEASTERN YADKIN COUNTY...

At 402 PM EDT, a severe thunderstorm was located near Nebo, or near
East Bend, 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...
Yadkinville...
East Bend...
Nebo...
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.

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 3621 8069 3628 8057 3628 8054 3626 8053
      3626 8051 3613 8047 3611 8066
TIME...MOT...LOC 2002Z 255DEG 4KT 3620 8059 

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

$$

SH

933 
WWUS51 KRNK 112033
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
433 PM EDT Wed Aug 11 2021

NCC197-112043-
/O.CAN.KRNK.SV.W.0149.000000T0000Z-210811T2045Z/
Yadkin NC-
433 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN YADKIN COUNTY IS CANCELLED...
        
The storm which prompted the warning has weakened below severe 
limits and has exited the warned area. Therefore, the warning has 
been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southwestern Virginia.

LAT...LON 3621 8069 3628 8057 3628 8054 3626 8053
      3626 8051 3613 8047 3611 8066
TIME...MOT...LOC 2032Z 255DEG 4KT 3621 8055 

$$

SH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 2:17 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	58 min
Aug 11, 2:25 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	65 min
Aug 11, 2:53 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	67 min
Aug 11, 3:05 PM EDT	Areal Flood Advisory	RNK	Alleghany, Wilkes	3 hr
Aug 11, 3:09 PM EDT	Special Weather Statement	RNK	Stokes	36 min
Aug 11, 3:27 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	33 min
Aug 11, 3:31 PM EDT	Special Weather Statement	RNK	Yadkin	29 min
Aug 11, 4:07 PM EDT	Special Weather Statement	RNK	Yadkin	38 min
Aug 11, 4:39 PM EDT	Areal Flood Advisory	RNK	Yadkin	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.