Alert archive / North Carolina / Tornado Warnings in 2011

Tornado Warning 12, NWS Blacksburg, VA

April 9, 2011Alleghany County, Ashe County, North Carolina

NWS Blacksburg, VA issued this tornado warning at Apr 9, 2011, 3:27 PM EDT for Alleghany County, Ashe County, North Carolina. It was in force for 33 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: Apr 9, 2011, 3:27 PM EDT (19:27 UTC)
Expired: Apr 9, 2011, 4:00 PM EDT
In force: 33 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, NC, Ashe County, NC

The radar

The Roanoke radar (KFCX), 111 km from the middle of the area, began a volume at 19:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 12:34 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 9, 2:00 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.5 hours before the alert went out and 136 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 704 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 256 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.

278 
WFUS51 KRNK 091927
TORRNK
NCC005-009-092000-
/O.NEW.KRNK.TO.W.0012.110409T1927Z-110409T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
327 PM EDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN ALLEGHANY COUNTY IN NORTHWEST NORTH CAROLINA
  CENTRAL ASHE COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 400 PM EDT.

* AT 324 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LANSING...
  MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LANSING...
  SCOTTVILLE...
  STRATFORD...
  TWIN OAKS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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 3656 8156 3657 8116 3643 8115 3644 8116
      3641 8118 3648 8156
TIME...MOT...LOC 1928Z 271DEG 35KT 3651 8148

$$

DS

2 follow-up statements

399 
WWUS51 KRNK 091936
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
336 PM EDT SAT APR 9 2011

NCC005-009-092000-
/O.CON.KRNK.TO.W.0012.000000T0000Z-110409T2000Z/
ALLEGHANY NC-ASHE NC-
336 PM EDT SAT APR 9 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR EASTERN
ASHE AND WESTERN ALLEGHANY COUNTIES...

AT 334 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 7 MILES WEST OF
SCOTTVILLE...OR 6 MILES NORTHEAST OF JEFFERSON...MOVING EAST AT 40
MPH.

LOCATIONS IMPACTED INCLUDE...
  SCOTTVILLE...
  STRATFORD...
  TWIN OAKS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3652 8146 3657 8116 3643 8115 3644 8116
      3641 8118 3647 8148
TIME...MOT...LOC 1937Z 271DEG 35KT 3649 8137

$$

DS

136 
WWUS51 KRNK 091955
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
355 PM EDT SAT APR 9 2011

NCC009-092004-
/O.CAN.KRNK.TO.W.0012.000000T0000Z-110409T2000Z/
ASHE NC-
355 PM EDT SAT APR 9 2011

...THE TORNADO WARNING FOR EASTERN ASHE COUNTY IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS EXITED THE COUNTY. 
THEREFORE...THE WARNING HAS BEEN CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 3643 8127 3646 8128 3648 8127 3650 8116
      3643 8115 3644 8116 3641 8118
TIME...MOT...LOC 1954Z 277DEG 33KT 3644 8121

$$

NCC005-092000-
/O.CON.KRNK.TO.W.0012.000000T0000Z-110409T2000Z/
ALLEGHANY NC-
355 PM EDT SAT APR 9 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR CENTRAL
ALLEGHANY COUNTY...

AT 352 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
ROTATION IN THE STORM THAT PROMPTED THE WARNING HAD WEAKENED. 
HOWEVER...THE POTENTIAL EXISTS FOR IT TO STRENGTHEN AGAIN. THE 
ROTATING STORM WAS LOCATED OVER SOUTHWESTERN ALLEGHANY COUNTY...OR 
NEAR LAUREL SPRINGS...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3643 8127 3646 8128 3648 8127 3650 8116
      3643 8115 3644 8116 3641 8118
TIME...MOT...LOC 1954Z 277DEG 33KT 3644 8121

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 8:29 PM EDT	Tornado Warning	RNK	Rockingham, Stokes	31 min
Apr 8, 8:30 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	30 min
Apr 8, 9:00 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	41 min
Apr 8, 10:59 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	31 min
Apr 8, 11:24 PM EDT	Special Weather Statement	RNK	Rockingham	36 min
Apr 8, 11:33 PM EDT	Special Weather Statement	RNK	Stokes	27 min
Apr 8, 11:58 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	32 min
Apr 9, 12:13 AM EDT	Special Weather Statement	RNK	Stokes	17 min
Apr 9, 12:27 AM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	48 min
Apr 9, 12:56 AM EDT	Tornado Warning	RNK	Alleghany, Surry	34 min
Apr 9, 1:18 AM EDT	Special Weather Statement	RNK	Surry	57 min
Apr 9, 1:26 AM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	35 min
Apr 9, 1:28 AM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	35 min
Apr 9, 1:46 AM EDT	Special Weather Statement	RNK	Ashe	59 min
Apr 9, 2:34 AM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe	41 min
Apr 9, 2:53 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Surry, Watauga, Wilkes, Yadkin	67 min
Apr 9, 3:20 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes, Yadkin	55 min
Apr 9, 3:47 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Stokes, Surry	58 min
Apr 9, 5:01 PM EDT	Special Weather Statement	RNK	Ashe	29 min
Apr 9, 5:11 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Surry, Wilkes	49 min
Apr 9, 5:36 PM EDT	Special Weather Statement	RNK	Rockingham	24 min
Apr 9, 5:59 PM EDT	Special Weather Statement	RNK	Yadkin	31 min
Apr 9, 6:17 PM EDT	Special Weather Statement	RNK	Caswell	43 min

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.