Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 310, NWS Blacksburg, VA

June 21, 2011Alleghany County, Wilkes County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jun 21, 2011, 3:09 PM EDT for Alleghany County, Wilkes County, North Carolina. It was in force for 58 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, 3:09 PM EDT (19:09 UTC)
Expired: Jun 21, 2011, 4:07 PM EDT
In force: 58 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, NC, Wilkes County, NC

The radar

The Roanoke radar (KFCX), 100 km from the middle of the area, began a volume at 19:10 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, 7.2 hours before the alert went out and 114 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: 508 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

001 
WUUS51 KRNK 211909
SVRRNK
NCC005-193-212015-
/O.NEW.KRNK.SV.W.0310.110621T1909Z-110621T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
309 PM EDT TUE JUN 21 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGHANY COUNTY IN NORTHWEST NORTH CAROLINA
  NORTHERN WILKES COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 415 PM EDT.

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
  NEAR DOUGHTON PARK...OR 6 MILES SOUTH OF SPARTA...AND MOVING
  NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DOUGHTON PARK...
  STONE MOUNTAIN STATE PARK...
  GLADE VALLEY...
  BARRETT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER.

REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...
DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY
HEAVY RAIN.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF QUARTER OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 6 6...2 1 5...4 3 2 4.

&&

LAT...LON 3628 8120 3637 8125 3639 8124 3640 8127
      3646 8127 3657 8108 3656 8090 3650 8093
      3645 8097 3641 8095 3638 8098
TIME...MOT...LOC 1908Z 241DEG 8KT 3641 8114

$$

WERT

2 follow-up statements

729 
WWUS51 KRNK 211934
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
334 PM EDT TUE JUN 21 2011

NCC005-193-212015-
/O.CON.KRNK.SV.W.0310.000000T0000Z-110621T2015Z/
ALLEGHANY NC-WILKES NC-
334 PM EDT TUE JUN 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR ALLEGHANY AND NORTHERN WILKES COUNTIES...

AT 332 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING ONE INCH
DIAMETER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM GLADE VALLEY TO 6 
MILES SOUTHWEST OF ABSHERS...MOVING NORTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  GLADE VALLEY...
  ENNICE...
  BARRETT...
  STONE MOUNTAIN STATE PARK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER.
REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...
DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY 
HEAVY RAIN THAT MAY RESULT IN LOCALIZED FLOODING.

&&

LAT...LON 3628 8120 3637 8125 3639 8124 3640 8127
      3646 8127 3657 8108 3656 8090 3650 8093
      3645 8097 3641 8095 3638 8098
TIME...MOT...LOC 1933Z 241DEG 8KT 3648 8103 3632 8121

$$

WERT

653 
WWUS51 KRNK 212007
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
407 PM EDT TUE JUN 21 2011

NCC005-193-212012-
/O.CAN.KRNK.SV.W.0310.000000T0000Z-110621T2015Z/
ALLEGHANY NC-WILKES NC-
407 PM EDT TUE JUN 21 2011

...SEVERE THUNDERSTORM WARNING NUMBER 310 FOR ALLEGHANY AND NORTHERN 
WILKES COUNTIES IS CANCELLED AND HAS BEEN REPLACED BY SEVERE 
THUNDERSTORM WARNING NUMBER 312...

THE SEVERE THUNDERSTORM THAT PROMPTED THE ORIGINAL WARNING HAS 
WEAKENED AND EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS 
BEEN CANCELLED.

HOWEVER...ADDITIONAL SEVERE THUNDERSTORMS SOUTHEAST OF GLENDALE 
SPRINGS ARE EXPECTED TO MOVE BACK INTO THE AREA FROM THE SOUTH 
BEFORE 500 PM EDT...THEREFORE A NEW WARNING HAS BEEN ISSUED TO 
HIGHLIGHT THIS THREAT. PLEASE REFER TO WARNING NUMBER 312 FOR 
SPECIFICS. 

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1 8 6 6...2 1 5...4 3 2 4.

LAT...LON 3628 8120 3637 8125 3639 8124 3640 8127
      3646 8127 3657 8108 3656 8090 3650 8093
      3645 8097 3641 8095 3638 8098
TIME...MOT...LOC 2002Z 241DEG 8KT 3651 8096 3635 8114

$$

WERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:15 PM EDT	Special Weather Statement	RNK	Ashe	60 min
Jun 21, 2:32 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	58 min
Jun 21, 3:42 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga	63 min
Jun 21, 4:00 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Wilkes	60 min
Jun 21, 4:25 PM EDT	Flash Flood Warning	RNK	Ashe, Watauga, Wilkes	5 hr
Jun 21, 4:40 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga	36 min
Jun 21, 4:52 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Wilkes	56 min
Jun 21, 5:02 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	58 min
Jun 21, 5:22 PM EDT	Flash Flood Warning	RNK	Wilkes	4 hr
Jun 21, 5:43 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes	37 min
Jun 21, 6:19 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	56 min
Jun 21, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	43 min
Jun 21, 7:14 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	61 min
Jun 21, 7:53 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	67 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011 Every severe thunderstorm warning 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.