Alert archive / North Carolina / Tornado Warnings in 2011

Tornado Warning 79, NWS Blacksburg, VA

November 22, 2011Surry County, North Carolina

NWS Blacksburg, VA issued this tornado warning at Nov 22, 2011, 11:59 PM EST for Surry County, North Carolina. It was in force for 18 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: Nov 22, 2011, 11:59 PM EST (04:59 UTC)
Expired: Nov 23, 2011, 12:17 AM EST
In force: 18 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

County Surry County, NC

The radar

The Roanoke radar (KFCX), 76 km from the middle of the area, began a volume at 05:00 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, 5.0 hours before the alert went out and 80 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: 113 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 954 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 288 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

529 
WFUS51 KRNK 230459
TORRNK
NCC171-230530-
/O.NEW.KRNK.TO.W.0079.111123T0459Z-111123T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
1159 PM EST TUE NOV 22 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* TORNADO WARNING FOR...
  SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 1230 AM EST.

* AT 1155 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MOUNTAIN
  PARK...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOUNTAIN PARK...
  DOBSON...
  WHITE PLAINS...
  FLAT ROCK...
  WOODVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

WHEN IT IS SAFE TO DO SO...PLEASE RELAY YOUR SEVERE WEATHER REPORTS
TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE AT...1...8 6
6...2 1 5...4 3 2 4.

&&

LAT...LON 3633 8087 3634 8090 3640 8093 3656 8058
      3655 8046 3655 8044 3642 8044 3640 8045
      3631 8087
TIME...MOT...LOC 0459Z 247DEG 38KT 3638 8081

$$

16

1 follow-up statement

785 
WWUS51 KRNK 230517
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1217 AM EST WED NOV 23 2011

NCC171-230527-
/O.CAN.KRNK.TO.W.0079.000000T0000Z-111123T0530Z/
SURRY NC-
1217 AM EST WED NOV 23 2011

...THE TORNADO WARNING FOR SURRY COUNTY IS CANCELLED...

THE TORNADO THREAT FOR THE WARNED AREA HAS ENDED. THE THUNDERSTORM 
PRODUCING THE TORNADO HAS WEAKENED.

STAY TUNED TO NOAA WEATHER RADIO...TV OR YOUR LOCAL NEW SOURCE FOR
THE LATEST WEATHER INFORMATION. REPORT ANY SEVERE WEATHER OR STORM
RELATED DAMAGE TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN
BLACKSBURG.

LAT...LON 3633 8087 3634 8090 3640 8093 3656 8058
      3655 8046 3655 8044 3642 8044 3640 8045
      3631 8087
TIME...MOT...LOC 0517Z 247DEG 38KT 3646 8059

$$

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 22, 8:21 PM EST	Special Weather Statement	RNK	Alleghany	54 min
Nov 22, 11:54 PM EST	Special Weather Statement	RNK	Surry	36 min
Nov 23, 3:17 AM EST	High Wind Warning	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes	12 hr
Nov 23, 3:17 AM EST	Wind Advisory	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes	19 hr

Nearby

Tornado Warnings in North Carolina, 2011 Every tornado warning in 2011 Tornadoes 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.