Alert archive / North Carolina / Wind Advisories in 2011

Wind Advisory 16, NWS Blacksburg, VA

March 18, 20114 counties in North Carolina; Grayson County, Virginia

NWS Blacksburg, VA issued this wind advisory at Mar 18, 2011, 7:22 AM EDT for 4 counties in North Carolina; Grayson County, Virginia. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 18, 2011, 7:22 AM EDT (11:22 UTC)
Expired
Mar 18, 2011, 11:00 AM EDT
In force
4 hr
Issued by
NWS Blacksburg, VA

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

The radar

The Roanoke radar (KFCX), 118 km from the middle of the area, began a volume at 11:20 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, 11.4 hours before the alert went out and 134 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 2011-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2501 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
101 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.

893 
WWUS71 KRNK 181122
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
722 AM EDT FRI MAR 18 2011

...STRONG GUSTY WINDS THIS MORNING...

.WINDS WILL GUSTS 40 TO 50 MPH THIS MORNING. 

NCZ001-002-018-019-VAZ015-181500-
/O.NEW.KRNK.WI.Y.0016.110318T1122Z-110318T1500Z/
ASHE-ALLEGHANY NC-WATAUGA-WILKES-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
WILKESBORO...INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
722 AM EDT FRI MAR 18 2011

...WIND ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 11 AM EDT THIS MORNING. 

* LOCATIONS...NORTHWEST NORTH CAROLINA.

* HAZARDS...STRONG GUSTY WINDS. 

* WINDS...WEST 15 TO 25 MPH WITH GUSTS UP TO 50 MPH.

* TIMING...WINDS WILL GRADUALLY DIMINISH THIS AFTERNOON. 

* IMPACTS...POTENTIAL HAZARD FOR HIGH PROFILE VEHICLES. 

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.

&&

$$
1 follow-up statement
006 
WWUS71 KRNK 181506
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
1106 AM EDT FRI MAR 18 2011

...WINDS BEGINNING TO SLOWLY DIMINISH...

.WINDS WILL CONTINUE TO GUST IN THE 25 TO 35 MPH RANGE THROUGH
EARLY AFTERNOON...HOWEVER THEY HAVE DIMINISHED BELOW WIND ADVISORY
CRITERIA. THUS THE WIND ADVISORY HAS BEEN ALLOWED TO EXPIRE.

NCZ001-002-018-019-VAZ015-181615-
/O.EXP.KRNK.WI.Y.0016.000000T0000Z-110318T1500Z/
ASHE-ALLEGHANY NC-WATAUGA-WILKES-GRAYSON-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
WILKESBORO...INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY
1106 AM EDT FRI MAR 18 2011

...WIND ADVISORY HAS EXPIRED...

THE WIND ADVISORY IS NO LONGER IN EFFECT. 

WESTERLY WINDS WILL CONTINUE TO GUST IN THE 25 TO 35 MPH RANGE
THROUGH THIS AFTERNOON BUT WILL REMAIN WELL BELOW ADVISORY CRITERIA.

$$

Nearby

Wind Advisories in North Carolina, 2011Wind Advisories in Virginia, 2011Every wind advisory 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.