Alert archive / Virginia / Special Weather Statements in 2018

Special Weather Statement, NWS Blacksburg, VA

August 6, 2018Patrick County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 6, 2018, 3:21 PM EDT for Patrick County, Virginia. It was in force for 39 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 6, 2018, 3:21 PM EDT (19:21 UTC)
Expired: Aug 6, 2018, 4:00 PM EDT
In force: 39 min
Issued by: NWS Blacksburg, VA

County Patrick County, VA

The radar

The Roanoke radar (KFCX), 40 km from the middle of the area, began a volume at 19:20 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, 7.4 hours before the alert went out and 83 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: 874 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1356 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

192 
WWUS81 KRNK 061921
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
321 PM EDT MON AUG 6 2018

VAZ032-062000-
Patrick-
321 PM EDT MON AUG 6 2018

...A STRONG THUNDERSTORM WILL AFFECT 
CENTRAL PATRICK COUNTY...

Until 400 PM EDT. 

At 321 PM EDT, a strong thunderstorm was located near Meadows Of Dan.
the storm is nearly stationary.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Stuart...
Meadows Of Dan...
Buffalo Ridge...
and Patrick Springs.

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

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3664 8051 3666 8051 3665 8049 3666 8049
      3668 8046 3670 8045 3671 8046 3674 8046
      3675 8045 3674 8040 3677 8039 3676 8020
      3656 8022
TIME...MOT...LOC 1921Z 277DEG 4KT 3668 8042 

$$

Loconto

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 1:12 PM EDT	Special Weather Statement	RNK	Grayson, City of Galax	33 min
Aug 6, 3:05 PM EDT	Special Weather Statement	RNK	Pulaski, City of Radford	55 min
Aug 6, 3:29 PM EDT	Special Weather Statement	RNK	Giles	46 min
Aug 6, 3:46 PM EDT	Special Weather Statement	RNK	Floyd	44 min
Aug 6, 3:53 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Franklin, Patrick	67 min
Aug 6, 4:20 PM EDT	Special Weather Statement	RNK	Smyth	40 min
Aug 6, 4:57 PM EDT	Special Weather Statement	RNK	Alleghany, Botetourt, Craig, Roanoke, City of Covington, City of Roanoke and 1 more	63 min
Aug 6, 5:00 PM EDT	Special Weather Statement	RNK	Franklin	60 min
Aug 6, 5:50 PM EDT	Special Weather Statement	RNK	City of Danville	55 min
Aug 6, 7:42 PM EDT	Special Weather Statement	RNK	Bland	48 min
Aug 5, 8:30 PM EDT	Areal Flood Advisory	RNK	Surry	64 min
Aug 5, 10:18 PM EDT	Special Weather Statement	RNK	Caldwell	27 min
Aug 6, 1:17 PM EDT	Special Weather Statement	RNK	Alleghany, Surry	58 min
Aug 6, 1:24 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	66 min
Aug 6, 1:31 PM EDT	Special Weather Statement	RNK	Caldwell	29 min
Aug 6, 2:10 PM EDT	Special Weather Statement	RNK	Wilkes	50 min
Aug 6, 2:26 PM EDT	Severe Thunderstorm Warning	RNK	Surry	49 min
Aug 6, 2:42 PM EDT	Areal Flood Advisory	RNK	Surry	67 min
Aug 6, 2:52 PM EDT	Special Weather Statement	RNK	Ashe	53 min
Aug 6, 3:02 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	41 min
Aug 6, 3:11 PM EDT	Special Weather Statement	RNK	Watauga	49 min
Aug 6, 3:15 PM EDT	Areal Flood Advisory	RNK	Watauga	2 hr
Aug 6, 4:06 PM EDT	Special Weather Statement	RNK	Stokes	39 min
Aug 6, 4:37 PM EDT	Special Weather Statement	RNK	Summers	38 min
Aug 6, 5:18 PM EDT	Areal Flood Advisory	RNK	Mercer, Summers	117 min
Aug 6, 7:58 PM EDT	Special Weather Statement	RNK	Summers	47 min

Nearby

Special Weather Statements in Virginia, 2018 Every special weather statement in 2018

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.