Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

August 17, 2021Wilkes County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Aug 17, 2021, 10:13 PM EDT for Wilkes County, North Carolina. It was in force for 32 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 17, 2021, 10:13 PM EDT (02:13 UTC)
Expired: Aug 17, 2021, 10:45 PM EDT
In force: 32 min
Issued by: NWS Blacksburg, VA
Hail: 0.00 in
Wind: 40

County Wilkes County, NC

The radar

The Roanoke radar (KFCX), 133 km from the middle of the area, began a volume at 02:17 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 17, 10:40 PM EDT	NON-TSTM WND DMG	1 Nne North Wilkesboro, NC	POWER LINE DOWN ACROSS 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 00:00Z, 2.2 hours before the alert went out and 116 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: 349 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

216 
WWUS81 KRNK 180213
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
1013 PM EDT Tue Aug 17 2021
 
NCZ002-019-180245-
Wilkes NC-Alleghany NC-
1013 PM EDT Tue Aug 17 2021

...Gusty showers will impact portions of central Alleghany and 
central Wilkes Counties in northwestern North Carolina through 1045 
PM EDT...

At 1013 PM EDT, Doppler radar was tracking gusty showers along a 
line extending from near Boomer to near St. Stephens. Movement was 
north at 45 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
North Wilkesboro...
Wilkesboro...
Boomer...
Windy Gap...
Mulberry...
Wilkesboro Reservoir...
and Buck.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

A Tornado Watch remains in effect until 200 AM EDT for northwestern
North Carolina...and southwestern Virginia.

&&

LAT...LON 3603 8135 3610 8138 3649 8111 3606 8091
      3606 8098 3603 8107 3604 8114 3603 8117
      3603 8118 3604 8120 3603 8127 3600 8132
TIME...MOT...LOC 0213Z 199DEG 38KT 3605 8130 3578 8121 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 8:26 PM EDT	Special Weather Statement	RNK	Grayson, Smyth, Tazewell	49 min
Aug 17, 9:57 PM EDT	Flash Flood Warning	RNK	Grayson	5 hr
Aug 17, 10:13 PM EDT	Areal Flood Advisory	RNK	Smyth, Tazewell	6 hr
Aug 17, 10:43 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, City of Galax	7 hr
Aug 17, 11:26 PM EDT	Areal Flood Advisory	RNK	Bland, Wythe	5 hr
Aug 17, 11:38 PM EDT	Special Weather Statement	RNK	City of Galax	37 min
Aug 18, 12:15 AM EDT	Areal Flood Advisory	RNK	Floyd, Franklin, Giles, Henry, Montgomery, Patrick and 6 more	6 hr
Aug 18, 12:22 AM EDT	Special Weather Statement	RNK	Carroll	23 min
Aug 18, 12:24 AM EDT	Tornado Warning	RNK	Carroll	21 min
Aug 18, 12:48 AM EDT	Special Weather Statement	RNK	Carroll	27 min
Aug 18, 1:01 AM EDT	Tornado Warning	RNK	Carroll, Patrick	29 min
Aug 18, 1:38 AM EDT	Special Weather Statement	RNK	Giles	37 min
Aug 18, 1:59 AM EDT	Areal Flood Advisory	RNK	Craig	3 hr
Aug 18, 2:02 AM EDT	Special Weather Statement	RNK	Montgomery	28 min
Aug 18, 2:10 AM EDT	Flash Flood Warning	RNK	Carroll, Grayson	5 hr
Aug 18, 2:23 AM EDT	Special Weather Statement	RNK	Patrick	37 min
Aug 18, 2:35 AM EDT	Special Weather Statement	RNK	Craig	25 min
Aug 18, 2:44 AM EDT	Special Weather Statement	RNK	Roanoke, City of Salem	31 min
Aug 18, 2:51 AM EDT	Special Weather Statement	RNK	Henry	24 min
Aug 18, 3:08 AM EDT	Areal Flood Warning	RNK	Grayson	6 hr
Aug 18, 3:18 AM EDT	Special Weather Statement	RNK	Franklin	27 min
Aug 17, 8:50 PM EDT	Special Weather Statement	RNK	Wilkes	25 min
Aug 17, 9:03 PM EDT	Special Weather Statement	RNK	Yadkin	27 min
Aug 17, 10:47 PM EDT	Tornado Warning	RNK	Surry, Wilkes, Yadkin	28 min
Aug 17, 11:15 PM EDT	Special Weather Statement	RNK	Surry, Yadkin	30 min
Aug 17, 11:49 PM EDT	Special Weather Statement	RNK	Yadkin	26 min
Aug 18, 12:08 AM EDT	Tornado Warning	RNK	Surry	37 min
Aug 18, 2:54 AM EDT	Areal Flood Warning	RNK	Watauga	6 hr

Nearby

Special Weather Statements in North Carolina, 2021 Every special weather statement 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.