Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Blacksburg, VA

March 18, 2021Watauga County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 18, 2021, 5:19 PM EDT for Watauga County, North Carolina. It was in force for 26 min. 4 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: Mar 18, 2021, 5:19 PM EDT (21:19 UTC)
Expired: Mar 18, 2021, 5:45 PM EDT
In force: 26 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Watauga County, NC

The radar

The Knoxville radar (KMRX), 148 km from the middle of the area, began a volume at 21:22 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
Mar 18, 5:28 PM EDT	HAIL 1	2 N Banner Elk, NC
Mar 18, 5:35 PM EDT	HAIL 0.25	Boone, NC	CORRECTS PREVIOUS HAIL REPORT FROM BOONE.
Mar 18, 5:43 PM EDT	HAIL 1	1 Ne Sugar Grove, NC
Mar 18, 5:51 PM EDT	HAIL 0.7	3 Se Silverstone, NC

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, 9.3 hours before the alert went out and 169 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 470 m²/s²
0-3 km storm-relative helicity: 562 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

493 
WUUS51 KRNK 182119
SVRRNK
NCC189-182145-
/O.NEW.KRNK.SV.W.0001.210318T2119Z-210318T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
519 PM EDT Thu Mar 18 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Watauga County in northwestern North Carolina...

* Until 545 PM EDT.

* At 519 PM EDT, a severe thunderstorm was located near Elk Park, or
  near Beech Mountain, moving east at 30 mph.

  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...
  Boone...
  Beech Mountain...
  Foscoe...
  Sugar Grove...
  Deep Gap...
  Todd...
  and Beech Mountain In Avery County.

This includes The following Location Appalachian State University.
 
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 3634 8186 3636 8180 3634 8176 3634 8171
      3638 8173 3639 8173 3639 8172 3635 8164
      3628 8157 3626 8153 3617 8148 3614 8182
      3619 8185 3619 8189 3622 8191 3627 8189
      3629 8192
TIME...MOT...LOC 2119Z 251DEG 26KT 3622 8199 

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

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 2:46 AM EDT	Special Weather Statement	RNK	Stokes	29 min
Mar 18, 2:47 PM EDT	Special Weather Statement	RNK	Stokes, Surry	43 min
Mar 18, 3:34 PM EDT	Special Weather Statement	RNK	Stokes, Yadkin	41 min
Mar 18, 4:15 PM EDT	Special Weather Statement	RNK	Rockingham, Stokes	30 min
Mar 18, 4:44 PM EDT	Special Weather Statement	RNK	Caswell, Rockingham	31 min
Mar 18, 5:15 PM EDT	Special Weather Statement	RNK	Caswell, Rockingham	30 min
Mar 18, 5:32 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	58 min
Mar 18, 5:37 PM EDT	Tornado Warning	RNK	Caswell, Rockingham	23 min
Mar 18, 5:42 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	33 min
Mar 18, 6:00 PM EDT	Tornado Warning	RNK	Caswell	22 min
Mar 18, 6:14 PM EDT	Special Weather Statement	RNK	Ashe	31 min
Mar 18, 6:52 PM EDT	Special Weather Statement	RNK	Alleghany	23 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.