Alert archive / North Carolina / Tornado Warnings in 2012

Tornado Warning 6, NWS Raleigh, NC

August 11, 2012Halifax County, Nash County, North Carolina

NWS Raleigh, NC issued this tornado warning at Aug 11, 2012, 1:13 PM EDT for Halifax County, Nash County, North Carolina. It was in force for 25 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 11, 2012, 1:13 PM EDT (17:13 UTC)
Expired
Aug 11, 2012, 1:38 PM EDT
In force
25 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon

Counties Halifax County, NC, Nash County, NC

The radar

The Raleigh/Durham radar (KRAX), 82 km from the middle of the area, began a volume at 17:15 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

Newport, NC (KMHX), launched 12:00Z, 5.2 hours before the alert went out and 180 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-pSkew-T log-p diagram, Newport, NC at 12:00Z on 2012-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1450 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 2012-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1450 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
785 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

490 
WFUS52 KRAH 111713
TORRAH
NCC083-127-111800-
/O.NEW.KRAH.TO.W.0006.120811T1713Z-120811T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
113 PM EDT SAT AUG 11 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN HALIFAX COUNTY IN CENTRAL NORTH CAROLINA
  NORTHERN NASH COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 200 PM EDT

* AT 110 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO OVER CASTALIA...OR 11 MILES NORTHWEST OF NASHVILLE...MOVING
  NORTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  AVENTON...
  GLENVIEW...

THIS INCLUDES INTERSTATE 95 BETWEEN EXITS 150 AND 160.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS
AVAILABLE LIE DOWN IN A LOW LYING AREA. PROTECT YOURSELF FROM FLYING
DEBRIS.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING...1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW
ENFORCEMENT AGENCY.

&&

LAT...LON 3621 7762 3598 7804 3605 7811 3631 7794
      3641 7781
TIME...MOT...LOC 1713Z 239DEG 13KT 3611 7802

$$

23
2 follow-up statements
187 
WWUS52 KRAH 111729
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
129 PM EDT SAT AUG 11 2012

NCC083-127-111800-
/O.CON.KRAH.TO.W.0006.000000T0000Z-120811T1800Z/
HALIFAX NC-NASH NC-
129 PM EDT SAT AUG 11 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR
NORTHEASTERN NASH AND WESTERN HALIFAX COUNTIES...

AT 124 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A ROTATING SUPERCELL CAPABLE OF PRODUCING A TORNADO.
NEAR AVENTON...OR 11 MILES NORTH OF NASHVILLE...MOVING NORTHEAST AT 
15 MPH. WHILE THE STORM HAS MOMENTARILY WEAKENED...IT IS POSSIBLE
THAT IT COULD RE-INTENSIFY AS MOVES NORTHEASTWARD INTO A MORE FAVORABLE
ENVIRONMENT.  

HAZARDS IN THE WARNING INCLUDE...
A TORNADO.
OTHER DAMAGING WINDS IN EXCESS OF 58 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... GLENVIEW AND AIRLIE.

WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY 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 7 7...6 3 3...6 7 7 2.

LAT...LON 3621 7762 3603 7795 3613 7806 3631 7794
      3641 7781
TIME...MOT...LOC 1727Z 239DEG 13KT 3614 7797

$$

23
161 
WWUS52 KRAH 111738
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
138 PM EDT SAT AUG 11 2012

NCC083-127-111748-
/O.CAN.KRAH.TO.W.0006.000000T0000Z-120811T1800Z/
HALIFAX NC-NASH NC-
138 PM EDT SAT AUG 11 2012

...THE TORNADO WARNING FOR NORTHEASTERN NASH AND WESTERN HALIFAX
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND THE WARNING IS 
NO LONGER IN EFFECT.

IF YOU OBSERVED SEVERE WEATHER INCLUDING DAMAGING WINDS OR LARGE
HAIL...PLEASE CONTACT THE NATIONAL WEATHER SERVICE BY CALLING TOLL
FREE 1...8 7 7...6 3 3...6 7 7 2...OR NOTIFY YOUR NEAREST LAW
ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN RALEIGH.

THIS INCLUDES INTERSTATE 95 BETWEEN EXITS 150 AND 160.

LAT...LON 3621 7762 3603 7795 3613 7806 3631 7794
      3641 7781
TIME...MOT...LOC 1738Z 239DEG 13KT 3616 7792

$$

23

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 11:32 PM EDTSpecial Weather StatementRAHForsyth43 min
Aug 11, 1:01 AM EDTSpecial Weather StatementRAHForsyth59 min
Aug 11, 2:15 AM EDTSpecial Weather StatementRAHForsyth30 min
Aug 11, 4:21 AM EDTSpecial Weather StatementRAHDavidson24 min
Aug 11, 4:48 AM EDTSpecial Weather StatementRAHGuilford12 min
Aug 11, 5:35 AM EDTSpecial Weather StatementRAHPerson40 min
Aug 11, 6:11 AM EDTSpecial Weather StatementRAHPerson49 min
Aug 11, 6:44 AM EDTSpecial Weather StatementRAHVance46 min
Aug 11, 12:03 PM EDTSpecial Weather StatementRAHWilson57 min
Aug 11, 12:44 PM EDTSpecial Weather StatementRAHWayne61 min
Aug 11, 12:59 PM EDTSpecial Weather StatementRAHFranklin, Halifax, Warren61 min
Aug 11, 1:05 PM EDTSpecial Weather StatementRAHAlamance55 min
Aug 11, 1:33 PM EDTSpecial Weather StatementRAHOrange, Person57 min
Aug 11, 1:59 PM EDTSpecial Weather StatementRAHGranville, Orange61 min
Aug 11, 2:08 PM EDTSevere Thunderstorm WarningRAHGranville, Vance52 min
Aug 11, 2:26 PM EDTSevere Thunderstorm WarningRAHDurham, Granville, Orange, Person, Vance50 min
Aug 11, 2:50 PM EDTSpecial Weather StatementRAHFranklin, Warren55 min
Aug 11, 3:19 PM EDTSpecial Weather StatementRAHAlamance, Durham, Granville, Orange, Person, Vance56 min
Aug 11, 3:29 PM EDTSpecial Weather StatementRAHSampson61 min
Aug 11, 3:30 PM EDTFlash Flood WarningRAHDavidson, Guilford, Randolph3 hr
Aug 11, 3:42 PM EDTSpecial Weather StatementRAHFranklin, Warren63 min
Aug 11, 4:07 PM EDTAreal Flood AdvisoryRAHFranklin, Halifax, Warren3 hr
Aug 11, 4:07 PM EDTSpecial Weather StatementRAHEdgecombe, Halifax, Johnston, Nash, Wayne, Wilson83 min
Aug 11, 4:36 PM EDTAreal Flood AdvisoryRAHNash, Wayne, Wilson3 hr
Aug 11, 4:36 PM EDTSevere Thunderstorm WarningRAHJohnston, Wayne, Wilson69 min
Aug 11, 5:13 PM EDTTornado WarningRAHEdgecombe, Wilson62 min
Aug 11, 5:15 PM EDTAreal Flood AdvisoryRAHEdgecombe, Halifax, Wilson3 hr
Aug 11, 5:58 PM EDTSpecial Weather StatementRAHForsyth32 min
Aug 11, 7:33 PM EDTFlash Flood WarningRAHDavidson, Guilford, Randolph3 hr

Nearby

Tornado Warnings in North Carolina, 2012Every tornado warning in 2012Tornadoes 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.