Alert archive / Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

August 7, 2021Buchanan County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 7, 2021, 4:03 PM EDT for Buchanan County, Virginia. It was in force for 27 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, 4:03 PM EDT (20:03 UTC)
Expired: Aug 7, 2021, 4:30 PM EDT
In force: 27 min
Issued by: NWS Blacksburg, VA
Hail: 0.25 in
Wind: 40

County Buchanan County, VA

The radar

The Charleston,WV radar (KRLX), 134 km from the middle of the area, began a volume at 20:05 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, 8.1 hours before the alert went out and 210 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.

223 
WWUS81 KRNK 072003
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
403 PM EDT Sat Aug 7 2021
 
VAZ007-072030-
Tazewell VA-
403 PM EDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of 
west central Tazewell County through 430 PM EDT...

At 403 PM EDT, Doppler radar was tracking a strong thunderstorm over
Raven, or near Richlands, moving east at 10 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Richlands...
Raven...
and Glen Burke.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 3715 8190 3715 8189 3714 8181 3703 8181
      3705 8182 3711 8189 3714 8190
TIME...MOT...LOC 2003Z 273DEG 7KT 3707 8186 

MAX HAIL SIZE...0.25 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 7, 2:21 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	54 min
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, 4:34 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.