Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

June 21, 2011Grayson County, Virginia; 4 counties in North Carolina

NWS Blacksburg, VA issued this special weather statement at Jun 21, 2011, 11:10 PM EDT for Grayson County, Virginia; 4 counties in North Carolina. It was in force for 65 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 21, 2011, 11:10 PM EDT (03:10 UTC)
Expired: Jun 22, 2011, 12:15 AM EDT
In force: 65 min
Issued by: NWS Blacksburg, VA

Counties Alleghany County, NC, Ashe County, NC, Watauga County, NC, Wilkes County, NC, Grayson County, VA

The radar

The Roanoke radar (KFCX), 135 km from the middle of the area, began a volume at 03:11 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 00:00Z, 3.2 hours before the alert went out and 160 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: 1052 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 2000 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 19 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.

914 
WWUS81 KRNK 220310
SPSRNK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1110 PM EDT TUE JUN 21 2011

NCZ001-002-018-019-VAZ009-015-220415-
ALLEGHANY NC-ASHE NC-GRAYSON VA-SMYTH VA-WATAUGA NC-WILKES NC-
1110 PM EDT TUE JUN 21 2011

...STRONG THUNDERSTORMS WILL AFFECT ALLEGHANY...ASHE...GRAYSON...
SMYTH...WATAUGA AND WILKES COUNTIES...

AT 1107 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM 9 MILES
EAST OF ABINGDON TO MOUNTAIN CITY TO 6 MILES SOUTHWEST OF BEECH
MOUNTAIN...MOVING EAST AT 25 MPH.

WIND GUSTS TO 50 MPH AND PEA-SIZED HAIL 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. 

THESE STORMS WILL BE NEAR REESE AROUND 1120 PM...ROMINGER AROUND 1125
PM...VALLE CRUCIS...SUGAR GROVE...SILVERSTONE...AND SEVEN DEVILS
AROUND 1130 PM...WHITETOP...FLATWOOD...ASHLAND AND AND LOVILL AROUND
1135 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3635 8184 3636 8179 3635 8177 3635 8173
      3641 8175 3647 8170 3657 8170 3663 8161
      3665 8164 3680 8170 3680 8128 3676 8126
      3676 8113 3612 8113 3611 8182 3617 8184

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 8:03 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania	57 min
Jun 21, 8:30 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	60 min
Jun 21, 8:46 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Rockbridge	19 min
Jun 21, 8:50 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	55 min
Jun 21, 9:41 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	64 min
Jun 21, 10:03 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania, City of Danville	57 min
Jun 21, 10:15 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Grayson, Smyth, Tazewell, Wythe	60 min
Jun 21, 10:36 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania, City of Danville	54 min
Jun 21, 11:16 PM EDT	Special Weather Statement	RNK	Bland, Smyth, Tazewell, Wythe	59 min
Jun 21, 11:20 PM EDT	Severe Thunderstorm Warning	RNK	Grayson, Smyth	55 min
Jun 22, 12:14 AM EDT	Special Weather Statement	RNK	Craig, Giles, Pulaski, Roanoke	61 min
Jun 22, 12:29 AM EDT	Special Weather Statement	RNK	Carroll, Floyd, Montgomery, Patrick, Pulaski, City of Radford and 1 more	61 min
Jun 22, 1:57 AM EDT	Special Weather Statement	RNK	Franklin, Henry, City of Martinsville	48 min
Jun 22, 2:33 AM EDT	Special Weather Statement	RNK	Henry, Pittsylvania, City of Martinsville	42 min
Jun 21, 9:00 PM EDT	Special Weather Statement	RNK	Caswell	30 min
Jun 21, 9:34 PM EDT	Special Weather Statement	RNK	Person	56 min
Jun 22, 1:27 AM EDT	Special Weather Statement	RNK	Caswell	48 min
Jun 22, 7:30 PM EDT	Special Weather Statement	RNK	Alleghany	30 min
Jun 21, 8:34 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier	25 min

Nearby

Special Weather Statements in North Carolina, 2011 Special Weather Statements in Virginia, 2011 Every special weather statement in 2011

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.