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, 12:46 PM EDT for Wilkes County, North Carolina. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 17, 2021, 12:46 PM EDT (16:46 UTC)
Expired: Aug 17, 2021, 1:30 PM EDT
In force: 44 min
Issued by: NWS Blacksburg, VA
Hail: 0.00 in
Wind: 30

County Wilkes County, NC

The radar

The Roanoke radar (KFCX), 129 km from the middle of the area, began a volume at 16:47 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.8 hours before the alert went out and 114 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: 522 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Aug 17, 10:11 AM EDT, 2 hours 35 minutes earlier.

Area forecast discussion, Aug 17, 10:11 AM EDT, 2 hours 35 minutes before

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Hazardous weather outlook, Aug 17, 4:16 AM EDT, 8 hours 30 minutes before

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In the hours before

Special weather statement, Aug 17, 12:46 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1246 PM EDT Tue Aug 17 2021

NCZ001-002-019-171730-
Ashe NC-Wilkes NC-Alleghany NC-
1246 PM EDT Tue Aug 17 2021

...A heavy tropical rain shower will move into southern Wilkes
county during the next 30 minutes. This cell has exhibited some
rotation and could intensify requiring a tornado warning soon.

At 1241 PM EDT, Doppler radar was tracking a strong thunderstorm
near Love Valley, or 8 miles southeast of Wilkesboro, moving
northwest at 25 mph.
25 mph.

HAZARD...Possible Tornado.

SOURCE...Radar indicated.

IMPACT...Wind damage to trees and power lines.

Locations impacted include...
North Wilkesboro...
Wilkesboro...
Wilbar...
Mc Grady...
Mulberry...
Buck...
and Millers Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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.

&&

LAT...LON 3629 8148 3644 8120 3606 8099 3604 8105
      3603 8106 3603 8110 3604 8111 3603 8112
      3604 8114 3603 8116
TIME...MOT...LOC 1643Z 145DEG 23KT 3605 8108

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 8:10 PM EDT	Special Weather Statement	RNK	Bedford, Campbell, Charlotte, City of Lynchburg	65 min
Aug 16, 8:45 PM EDT	Areal Flood Advisory	RNK	Bland, Tazewell	2 hr
Aug 16, 9:14 PM EDT	Special Weather Statement	RNK	Amherst, Appomattox, Buckingham	46 min
Aug 17, 3:37 AM EDT	Flash Flood Watch	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 21 more	24 hr
Aug 17, 9:32 AM EDT	Areal Flood Advisory	RNK	Carroll	5 hr
Aug 17, 2:27 PM EDT	Special Weather Statement	RNK	Grayson	48 min
Aug 17, 2:43 PM EDT	Tornado Warning	RNK	Henry, Patrick	32 min
Aug 17, 2:53 PM EDT	Flood Watch	RNK	Alleghany, Amherst, Bath, Bedford, Botetourt, Craig and 12 more	12 min
Aug 17, 3:17 PM EDT	Tornado Warning	RNK	Franklin, Henry, Patrick	28 min
Aug 17, 3:18 PM EDT	Tornado Warning	RNK	Franklin, Henry, City of Martinsville	27 min
Aug 17, 3:20 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Franklin, Montgomery, Patrick, Pittsylvania and 3 more	40 min
Aug 17, 3:41 PM EDT	Tornado Warning	RNK	Franklin, Henry, Patrick	34 min
Aug 17, 3:58 PM EDT	Special Weather Statement	RNK	Bedford, Craig, Giles, Montgomery, Roanoke, City of Roanoke and 1 more	47 min
Aug 17, 4:09 PM EDT	Areal Flood Advisory	RNK	City of Roanoke, City of Salem	3 hr
Aug 17, 4:20 PM EDT	Special Weather Statement	RNK	Henry, Patrick, City of Martinsville	40 min
Aug 17, 4:35 PM EDT	Special Weather Statement	RNK	Carroll	25 min
Aug 17, 4:45 PM EDT	Special Weather Statement	RNK	Bedford, Botetourt, Craig, Roanoke, City of Roanoke, City of Salem	45 min
Aug 17, 5:05 PM EDT	Special Weather Statement	RNK	Grayson, Wythe, City of Galax	40 min
Aug 17, 5:23 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham	52 min
Aug 17, 5:34 PM EDT	Tornado Warning	RNK	Bedford, Campbell, City of Lynchburg	26 min
Aug 17, 6:05 PM EDT	Special Weather Statement	RNK	Amherst, City of Lynchburg	40 min
Aug 17, 6:45 PM EDT	Special Weather Statement	RNK	City of Lynchburg	45 min
Aug 17, 7:42 PM EDT	Areal Flood Advisory	RNK	Amherst	79 min
Aug 17, 11:48 AM EDT	Tornado Warning Tornado observed	RNK	Wilkes	42 min
Aug 17, 12:35 PM EDT	Tornado Warning Tornado observed	RNK	Wilkes, Yadkin	40 min
Aug 17, 1:19 PM EDT	Tornado Warning	RNK	Wilkes	41 min
Aug 17, 1:48 PM EDT	Tornado Warning	RNK	Alleghany, Wilkes	42 min
Aug 17, 1:58 PM EDT	Special Weather Statement	RNK	Alleghany, Caswell, Rockingham, Stokes, Surry, Yadkin	32 min
Aug 17, 2:18 PM EDT	Tornado Warning	RNK	Caswell	32 min
Aug 17, 6:50 PM EDT	Special Weather Statement	RNK	Watauga	25 min
Aug 17, 7:13 PM EDT	Flash Flood Warning	RNK	Watauga	8 hr
Aug 17, 7:54 PM EDT	Special Weather Statement	RNK	Ashe	36 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.