Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 3, 2012Smyth County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 3, 2012, 3:49 PM EDT for Smyth County, Virginia. It was in force for 41 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, 3:49 PM EDT (19:49 UTC)
Expired: Aug 3, 2012, 4:30 PM EDT
In force: 41 min
Issued by: NWS Blacksburg, VA

County Smyth County, VA

The radar

The Roanoke radar (KFCX), 129 km from the middle of the area, began a volume at 19:51 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, 7.8 hours before the alert went out and 186 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: 967 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

391 
WWUS81 KRNK 031949
SPSRNK

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

VAZ009-032030-
SMYTH VA-
349 PM EDT FRI AUG 3 2012

...A STRONG THUNDERSTORM WILL AFFECT SMYTH COUNTY...

AT 343 PM EDT...STRONG THUNDERSTORMS WERE DEVELOPING ACROSS WESTERN 
SMYTH COUNTY...ALONG THE WASHINGTON...SMYTH COUNTY LINE FROM JUST 
NORTH OF CHILHOWIE TO SALTVILLE...MOVING NORTH AT 5 MPH.

WIND GUSTS TO 30 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THESE
STORMS. EXPECT FREQUENT CLOUD TO GROUND LIGHTNING FROM THESE STORMS. 
DO NOT STAY IN THE OPEN OR SEEK SHELTER UNDER TREES WHEN LIGHTNING 
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. 

LAT...LON 3696 8181 3696 8176 3698 8171 3694 8169
      3693 8167 3699 8158 3678 8152 3675 8169
      3679 8170 3688 8180 3695 8182

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:34 PM EDT	Special Weather Statement	RNK	Pittsylvania, City of Danville	56 min
Aug 3, 4:19 PM EDT	Special Weather Statement	RNK	Tazewell	26 min
Aug 3, 4:35 PM EDT	Special Weather Statement	RNK	Halifax	55 min
Aug 3, 5:07 PM EDT	Areal Flood Advisory	RNK	Tazewell	5 hr
Aug 3, 5:16 PM EDT	Special Weather Statement	RNK	Campbell, Halifax, Pittsylvania, City of Danville, City of Lynchburg	59 min
Aug 3, 5:25 PM EDT	Special Weather Statement	RNK	City of Danville	65 min
Aug 3, 5:37 PM EDT	Special Weather Statement	RNK	Montgomery	38 min
Aug 3, 6:19 PM EDT	Special Weather Statement	RNK	Bedford, City of Lynchburg	41 min
Aug 3, 6:29 PM EDT	Special Weather Statement	RNK	Appomattox, Charlotte, Halifax	46 min
Aug 3, 7:23 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham	52 min
Aug 3, 6:50 PM EDT	Special Weather Statement	RNK	Rockingham	55 min
Aug 3, 6:59 PM EDT	Flash Flood Warning	RNK	Rockingham	3 hr
Aug 3, 7:27 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	48 min
Aug 3, 2:43 PM EDT	Special Weather Statement	RNK	Greenbrier	62 min
Aug 3, 3:26 PM EDT	Areal Flood Advisory	RNK	Greenbrier	2 hr
Aug 3, 5:58 PM EDT	Special Weather Statement	RNK	Mercer	47 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.