Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 3, 2012Buckingham County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 3, 2012, 8:21 PM EDT for Buckingham County, Virginia. It was in force for 24 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 3, 2012, 8:21 PM EDT (00:21 UTC)
Expired: Aug 3, 2012, 8:45 PM EDT
In force: 24 min
Issued by: NWS Blacksburg, VA

County Buckingham County, VA

The radar

The Norfolk radar (KAKQ), 147 km from the middle of the area, began a volume at 00:24 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 00:00Z, 0.4 hours before the alert went out and 104 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: 1576 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

259 
WWUS81 KRNK 040021
SPSRNK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
821 PM EDT FRI AUG 3 2012

VAZ047-040045-
BUCKINGHAM VA-
821 PM EDT FRI AUG 3 2012

...STRONG THUNDERSTORMS WITH EXCESSIVE LIGHTNING WILL AFFECT 
BUCKINGHAM COUNTY...

AT 812 PM EDT...A CLUSTER OF STRONG THUNDERSTORMS EXTENDED FROM 
BUCKINGHAM TO ANDERSONVILLE ACROSS WESTERN BUCKINGHAM 
COUNTY...MOVING EAST AT 5 MPH.

THESE STORMS ARE PRODUCING EXCESSIVE AND DANGEROUS CLOUD TO GROUND 
LIGHTNING. DO NOT STAY IN THE OPEN OR SEEK SHELTER UNDER TREES WHEN 
LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. 

THIS STORM WILL BE NEAR DILLWYN AROUND 845 PM.

LAT...LON 3734 7846 3733 7852 3735 7856 3760 7865
      3776 7862 3776 7851 3779 7850 3780 7849
      3777 7847 3774 7842 3774 7836 3772 7835
      3769 7824 3764 7824

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 8:50 PM EDT	Areal Flood Advisory	RNK	Buckingham	3 hr
Aug 3, 10:28 PM EDT	Special Weather Statement	RNK	Grayson	32 min
Aug 3, 10:29 PM EDT	Special Weather Statement	RNK	Carroll	31 min
Aug 3, 11:06 PM EDT	Special Weather Statement	RNK	Grayson, City of Galax	24 min
Aug 3, 11:07 PM EDT	Special Weather Statement	RNK	Carroll	38 min
Aug 4, 12:20 PM EDT	Special Weather Statement	RNK	Montgomery	55 min
Aug 4, 3:42 PM EDT	Special Weather Statement	RNK	Botetourt	63 min
Aug 3, 9:09 PM EDT	Special Weather Statement	RNK	Greenbrier	51 min
Aug 3, 9:36 PM EDT	Areal Flood Advisory	RNK	Greenbrier	3 hr
Aug 3, 10:30 PM EDT	Special Weather Statement	RNK	Greenbrier	30 min
Aug 4, 2:23 PM EDT	Special Weather Statement	RNK	Greenbrier	52 min

Nearby

Special Weather Statements in Virginia, 2012 Every special weather statement in 2012

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.