Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS Blacksburg, VA

June 21, 20214 counties in North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jun 21, 2021, 6:29 PM EDT for 4 counties in North Carolina. It was in force for 61 min. 3 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: Jun 21, 2021, 6:29 PM EDT (22:29 UTC)
Expired: Jun 21, 2021, 7:30 PM EDT
In force: 61 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alleghany County, NC, Ashe County, NC, Watauga County, NC, Wilkes County, NC

The radar

The Roanoke radar (KFCX), 142 km from the middle of the area, began a volume at 22:33 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
Jun 21, 6:40 PM EDT	HAIL 0.5	3 Nne Maple Springs, NC
Jun 21, 7:08 PM EDT	TSTM WND DMG	1 W Purlear, NC	TREE DOWN ALONG BOONE TRAIL. TIME ESTIMATED BY RADAR.
Jun 21, 7:24 PM EDT	TSTM WND DMG	1 Wnw Purlear, NC	TREE DOWN ON BOONE TRAIL AND PARSONSVILLE ROAD.

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, 10.5 hours before the alert went out and 139 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: 913 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

106 
WUUS51 KRNK 212229
SVRRNK
NCC005-009-189-193-212330-
/O.NEW.KRNK.SV.W.0067.210621T2229Z-210621T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
629 PM EDT Mon Jun 21 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Southwestern Alleghany County in northwestern North Carolina...
  Northwestern Wilkes County in northwestern North Carolina...
  Southeastern Watauga County in northwestern North Carolina...
  Southeastern Ashe County in northwestern North Carolina...

* Until 730 PM EDT.

* At 627 PM EDT, a severe thunderstorm was located near Deep Gap, 
  moving northeast at 20 mph. Additional strong storms were located 
  near Summit and Wilbar.

  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...
  North Wilkesboro...
  Wilkesboro...
  Laurel Springs...
  Glendale Springs...
  Wilbar...
  Deep Gap...
  and Mc Grady.

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.

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 3610 8148 3610 8151 3612 8154 3612 8155
      3622 8162 3644 8124 3616 8109 3609 8148
TIME...MOT...LOC 2227Z 241DEG 16KT 3619 8149 

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

Hanes

1 follow-up statement

743 
WWUS51 KRNK 212333 RRA
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
733 PM EDT Mon Jun 21 2021

NCC005-009-189-193-212343-
/O.EXP.KRNK.SV.W.0067.000000T0000Z-210621T2330Z/
Alleghany NC-Wilkes NC-Watauga NC-Ashe NC-
733 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHWESTERN ALLEGHANY...NORTHWESTERN WILKES...SOUTHEASTERN WATAUGA
AND SOUTHEASTERN ASHE COUNTIES IN NORTHWESTERN NORTH CAROLINA HAS
EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.  However gusty winds are still possible with
this thunderstorm.

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 3610 8148 3610 8151 3612 8154 3612 8155
      3622 8162 3644 8124 3616 8109 3609 8148
TIME...MOT...LOC 2333Z 241DEG 16KT 3633 8118 

$$

Hanes

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 5:30 PM EDT	Special Weather Statement	RNK	Ashe	30 min
Jun 21, 5:43 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	47 min
Jun 21, 5:58 PM EDT	Special Weather Statement	RNK	Alleghany	32 min
Jun 21, 6:50 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	40 min
Jun 21, 7:00 PM EDT	Special Weather Statement	RNK	Watauga	15 min
Jun 21, 7:32 PM EDT	Areal Flood Advisory	RNK	Watauga, Wilkes	3 hr
Jun 21, 7:32 PM EDT	Special Weather Statement	RNK	Wilkes	28 min

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.