Alert archive / Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

August 7, 2021Smyth County, Tazewell County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 7, 2021, 2:21 PM EDT for Smyth County, Tazewell County, Virginia. It was in force for 54 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 7, 2021, 2:21 PM EDT (18:21 UTC)
Expired: Aug 7, 2021, 3:15 PM EDT
In force: 54 min
Issued by: NWS Blacksburg, VA
Hail: 0.00 in
Wind: 30

Counties Smyth County, VA, Tazewell County, VA

The radar

The Roanoke radar (KFCX), 120 km from the middle of the area, began a volume at 18:24 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

Roanoke, VA (KRNK), launched 12:00Z, 6.4 hours before the alert went out and 188 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: 1171 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

945 
WWUS81 KRNK 071821
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
221 PM EDT Sat Aug 7 2021
 
VAZ007-009-071915-
Tazewell VA-Smyth VA-
221 PM EDT Sat Aug 7 2021

...Strong thunderstorms will impact portions of 
Smyth and Tazewell Counties through 315 PM EDT...

At 220 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Jewell Ridge to Saltville to 8 miles northwest
of Mountain City. Movement was northeast at 20 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Marion...
Richlands...
Tazewell...
Saltville...
Chilhowie...
Cedar Bluff...
and Raven.

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 3720 8176 3724 8174 3720 8168 3721 8156
      3726 8150 3725 8148 3727 8142 3732 8139
      3719 8136 3705 8141 3704 8146 3700 8143
      3672 8152 3666 8163 3679 8170 3693 8183
      3696 8178 3703 8181 3711 8189 3714 8190
TIME...MOT...LOC 1820Z 224DEG 18KT 3717 8180 3688 8175 3658 8188 

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

$$

RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 3:28 PM EDT	Special Weather Statement	RNK	Grayson, Wythe	62 min
Aug 7, 3:40 PM EDT	Special Weather Statement	RNK	Tazewell	65 min
Aug 7, 4:03 PM EDT	Special Weather Statement	RNK	Buchanan	27 min
Aug 7, 4:34 PM EDT	Special Weather Statement	RNK	Grayson, Wythe	26 min
Aug 7, 4:55 PM EDT	Special Weather Statement	RNK	Giles	35 min
Aug 7, 5:09 PM EDT	Special Weather Statement	RNK	Giles	36 min
Aug 7, 5:27 PM EDT	Special Weather Statement	RNK	Pulaski	33 min
Aug 7, 5:38 PM EDT	Special Weather Statement	RNK	Carroll, City of Galax	37 min
Aug 7, 5:40 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Patrick, City of Galax	65 min
Aug 7, 6:00 PM EDT	Special Weather Statement	RNK	Pulaski	30 min
Aug 7, 6:43 PM EDT	Special Weather Statement	RNK	Carroll	32 min
Aug 7, 6:54 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Patrick	66 min
Aug 7, 3:54 PM EDT	Special Weather Statement	RNK	Wilkes	51 min
Aug 7, 4:24 PM EDT	Severe Thunderstorm Warning	RNK	Watauga, Wilkes	43 min
Aug 7, 4:39 PM EDT	Areal Flood Advisory	RNK	Wilkes	3 hr
Aug 7, 4:47 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	58 min
Aug 7, 5:02 PM EDT	Special Weather Statement	RNK	Caldwell	28 min
Aug 7, 5:24 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	66 min
Aug 7, 6:29 PM EDT	Special Weather Statement	RNK	Surry, Yadkin	46 min
Aug 7, 4:14 PM EDT	Special Weather Statement	RNK	Mercer, Summers	46 min

Nearby

Special Weather Statements in Virginia, 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.