Alert archive / Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

June 9, 2021Roanoke County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jun 9, 2021, 4:12 PM EDT for Roanoke County, Virginia. It was in force for 33 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: Jun 9, 2021, 4:12 PM EDT (20:12 UTC)
Expired: Jun 9, 2021, 4:45 PM EDT
In force: 33 min
Issued by: NWS Blacksburg, VA

County Roanoke County, VA

The radar

The Roanoke radar (KFCX), 30 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 71 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: 92 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1085 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

730 
WWUS81 KRNK 092012
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
412 PM EDT Wed Jun 9 2021

VAZ014-092045-
Montgomery-
412 PM EDT Wed Jun 9 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN MONTGOMERY 
COUNTY...

At 410 PM EDT, a strong thunderstorm was located near Mc Donalds
Mill, or near Blacksburg, moving east at 5 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Mc Donalds Mill.

Locally heavy rain with rates of two to four inches per hour 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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3731 8026 3729 8024 3723 8023 3725 8041
      3732 8041 3733 8026
TIME...MOT...LOC 2010Z 272DEG 6KT 3728 8034 

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 12:45 PM EDT	Special Weather Statement	RNK	Buckingham	45 min
Jun 9, 1:01 PM EDT	Special Weather Statement	RNK	Halifax	29 min
Jun 9, 1:19 PM EDT	Areal Flood Advisory	RNK	Grayson, City of Galax	116 min
Jun 9, 1:37 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, City of Galax	38 min
Jun 9, 1:52 PM EDT	Areal Flood Advisory	RNK	Appomattox, Buckingham	113 min
Jun 9, 2:40 PM EDT	Special Weather Statement	RNK	Appomattox	35 min
Jun 9, 2:51 PM EDT	Special Weather Statement	RNK	Patrick	24 min
Jun 9, 3:05 PM EDT	Special Weather Statement	RNK	Pulaski	25 min
Jun 9, 3:36 PM EDT	Special Weather Statement	RNK	Campbell	24 min
Jun 9, 3:51 PM EDT	Special Weather Statement	RNK	Pulaski	24 min
Jun 9, 4:18 PM EDT	Special Weather Statement	RNK	Mecklenburg	42 min
Jun 9, 5:02 PM EDT	Special Weather Statement	RNK	Buckingham	43 min
Jun 9, 5:21 PM EDT	Special Weather Statement	RNK	City of Roanoke	24 min
Jun 9, 6:10 PM EDT	Special Weather Statement	RNK	City of Buena Vista	35 min
Jun 9, 6:13 PM EDT	Special Weather Statement	RNK	Pittsylvania	32 min
Jun 9, 6:28 PM EDT	Severe Thunderstorm Warning	RNK	Amherst	47 min
Jun 9, 6:47 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	43 min
Jun 9, 7:14 PM EDT	Areal Flood Advisory	RNK	Amherst, Appomattox, Bedford, Campbell, City of Lynchburg	111 min
Jun 9, 7:29 PM EDT	Special Weather Statement	RNK	Halifax	31 min
Jun 9, 2:48 PM EDT	Special Weather Statement	RNK	Alleghany	27 min
Jun 9, 3:57 PM EDT	Special Weather Statement	RNK	Surry	33 min
Jun 8, 8:26 PM EDT	Areal Flood Advisory	RNK	Mercer	111 min
Jun 8, 9:59 PM EDT	Special Weather Statement	RNK	Greenbrier	46 min
Jun 8, 10:15 PM EDT	Areal Flood Advisory	RNK	Greenbrier	3 hr
Jun 8, 10:43 PM EDT	Special Weather Statement	RNK	Greenbrier	47 min
Jun 9, 3:54 PM EDT	Special Weather Statement	RNK	Mercer	36 min
Jun 9, 4:37 PM EDT	Special Weather Statement	RNK	Mercer	23 min
Jun 9, 4:46 PM EDT	Special Weather Statement	RNK	Summers	29 min
Jun 9, 4:58 PM EDT	Areal Flood Advisory	RNK	Summers	63 min
Jun 9, 5:13 PM EDT	Areal Flood Advisory	RNK	Mercer	3 hr

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.