Alert archive / North Carolina / Wind Advisories in 2012

Wind Advisory 10, NWS Blacksburg, VA

March 5, 2012Alleghany County, Ashe County, Watauga County, North Carolina; Grayson County, Virginia

NWS Blacksburg, VA issued this wind advisory at Mar 5, 2012, 4:12 AM EST for Alleghany County, Ashe County, Watauga County, North Carolina; Grayson County, Virginia. It took effect at Mar 5, 2012, 8:00 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Mar 5, 2012, 4:12 AM EST (09:12 UTC)
In effect from
Mar 5, 2012, 8:00 AM EST
Expired
Mar 5, 2012, 4:00 PM EST
In force
8 hr
Issued by
NWS Blacksburg, VA

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

The radar

The Roanoke radar (KFCX), 118 km from the middle of the area, began a volume at 09:14 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, 9.2 hours before the alert went out and 140 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, Greensboro/Hi Pt, NC at 00:00Z on 2012-03-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2012-03-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939587897Sfc1 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
2277 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
116 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.

281 
WWUS71 KRNK 050912
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
412 AM EST MON MAR 5 2012

...STRONG GUSTY WINDS TODAY...

.A FAST MOVING ALBERTA CLIPPER WILL MOVE EAST OF THE REGION
THIS AFTERNOON. WITH THE PASSAGE OF THIS SYSTEM...WINDS WILL 
INCREASE WITH STRONG WIND GUSTS BEGINNING THIS MORNING AND
CONTINUING THROUGH THE AFTERNOON.

NCZ001-002-018-VAZ015-051715-
/O.NEW.KRNK.WI.Y.0010.120305T1300Z-120305T2100Z/
ASHE-ALLEGHANY NC-WATAUGA-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
412 AM EST MON MAR 5 2012

...WIND ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO 4 PM EST
THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM 8 AM THIS MORNING TO 4 PM EST
THIS AFTERNOON.

* LOCATIONS...THE HIGH COUNTRY OF NORTH CAROLINA AND ACROSS THE
  GRAYSON HIGHLANDS OF VIRGINIA.

* HAZARDS...STRONG WIND GUSTS.

* WINDS...NORTHWEST 20 TO 35 MPH WITH GUSTS UP TO 50 MPH.

* TIMING...BEGINNING THIS MORNING AND CONTINUING THROUGH THE
  AFTERNOON. 

* IMPACTS...GUSTS OF 50 MPH MAY DOWN TREE LIMBS AND MAKE DRIVING
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
2 follow-up statements
564 
WWUS71 KRNK 051937
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
237 PM EST MON MAR 5 2012

...STRONG GUSTY WINDS TO DIMINISH...

.THE CLIPPER IS EAST OF THE AREA AND WINDS SHOULD START TO WANE
UNDER ADVISORY LEVELS BY 4 PM...WHICH MEANS GUSTS OVER 45 MPH
SHOULD NOT BE AS COMMONPLACE. HIGH PRESSURE BUILDS IN TONIGHT
BRINGING WINDS TO UNDER 10 MPH.

NCZ001-002-018-VAZ015-052100-
/O.CON.KRNK.WI.Y.0010.000000T0000Z-120305T2100Z/
ASHE-ALLEGHANY NC-WATAUGA-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
237 PM EST MON MAR 5 2012

...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* LOCATIONS...THE HIGH COUNTRY OF NORTH CAROLINA AND ACROSS THE 
  GRAYSON HIGHLANDS OF VIRGINIA. 

* HAZARDS...STRONG WIND GUSTS.

* WINDS...NORTHWEST 20 TO 35 MPH WITH GUSTS UP TO 50 MPH.

* TIMING...UNTIL 4 PM TODAY.

* IMPACTS...GUSTS OF 50 MPH MAY DOWN TREE LIMBS AND MAKE DRIVING
  DIFFICULT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS GUSTING OVER 45 MPH ARE EXPECTED.
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
874 
WWUS71 KRNK 052047
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
347 PM EST MON MAR 5 2012



NCZ001-002-018-VAZ015-052200-
/O.EXP.KRNK.WI.Y.0010.000000T0000Z-120305T2100Z/
ASHE-ALLEGHANY NC-WATAUGA-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
347 PM EST MON MAR 5 2012

...WIND ADVISORY WILL EXPIRE AT 4 PM EST THIS AFTERNOON...

WINDS WILL BEGIN DIMINISHING AS WE HEAD INTO THE EVENING WITH HIGH
PRESSURE MOVING IN. A FEW GUSTS UP TO 45 MPH WILL STILL POSSIBLE
UNTIL SUNSET.

$$

Nearby

Wind Advisories in North Carolina, 2012Wind Advisories in Virginia, 2012Every wind advisory 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.