Alert archive / Virginia / Wind Advisories in 2014

Wind Advisory 7, NWS Blacksburg, VA

February 21, 201420 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina

NWS Blacksburg, VA issued this wind advisory at Feb 21, 2014, 10:58 AM EST for 20 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Feb 21, 2014, 10:58 AM EST (15:58 UTC)
Expired
Feb 21, 2014, 4:35 PM EST
In force
6 hr
Issued by
NWS Blacksburg, VA
All 23 counties

Alleghany County, NC, Ashe County, NC, Watauga County, NC, Alleghany County, VA, Bath County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Lexington, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Grayson County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 22 km from the middle of the area, began a volume at 15:59 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

Roanoke, VA (KRNK), launched 12:00Z, 4.0 hours before the alert went out and 83 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, Roanoke, VA at 12:00Z on 2014-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 45 joules per kilogram.LCLLFCEL10008507005003002001001 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, Roanoke, VA at 12:00Z on 2014-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 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
45 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
628 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
307 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.

594 
WWUS71 KRNK 211558
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
1058 AM EST FRI FEB 21 2014

...STRONG POST FRONTAL WESTERLY WINDS THIS AFTERNOON...

.THE GRADIENT BETWEEN A COLD FRONT PUSHING EAST OF THE AREA AND
HIGH PRESSURE BUILDING IN FROM THE WEST WILL MAKE FOR A PERIOD OF
STRONG WESTERLY WINDS THROUGH THIS AFTERNOON. THE WINDS WILL BE
THE STRONGEST ACROSS THE HIGHER RIDGES ALONG THE BLUE RIDGE.

NCZ001-002-018-VAZ009-012>020-022>024-212300-
/O.NEW.KRNK.WI.Y.0007.140221T1558Z-140221T2300Z/
ASHE-ALLEGHANY NC-WATAUGA-SMYTH-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-
ROCKBRIDGE-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
MARION...WYTHEVILLE...RADFORD...PULASKI...BLACKSBURG...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY...GALAX...FLOYD...
NEW CASTLE...CLIFTON FORGE...COVINGTON...HOT SPRINGS...ROANOKE...
SALEM...FINCASTLE...LEXINGTON...BUENA VISTA
1058 AM EST FRI FEB 21 2014

...WIND ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 6 PM EST THIS EVENING.

* LOCATIONS...HIGHER ELEVATIONS ESPECIALLY ALONG THE BLUE RIDGE.

* HAZARDS...STRONG WEST WINDS.

* WINDS...WEST 15 TO 30 MPH WITH GUSTS TO 50 MPH.

* TIMING...THROUGH LATE THIS AFTERNOON.

* IMPACTS...TREES MAY BE TOPPLED DUE TO THE WET GROUND AND STRONG
  WINDS. SOME POWER OUTAGES MAY ALSO OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS SUSTAINED WINDS OF 31 TO 39 MPH...OR WIND
GUSTS OF 46 TO 57 MPH...ARE EXPECTED. WINDS THIS STRONG WILL
LIKELY CAUSE SPORADIC POWER OUTAGES AND CAN MAKE DRIVING
DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. UNFASTENED
ITEMS SUCH AS GARBAGE CANS AND LAWN FURNITURE SHOULD BE MOVED
INDOORS.

&&

$$
1 follow-up statement
098 
WWUS71 KRNK 212135
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
435 PM EST FRI FEB 21 2014


NCZ001-002-018-VAZ009-012>020-022>024-212245-
/O.CAN.KRNK.WI.Y.0007.000000T0000Z-140221T2300Z/
ASHE-ALLEGHANY NC-WATAUGA-SMYTH-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-
ROCKBRIDGE-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
MARION...WYTHEVILLE...RADFORD...PULASKI...BLACKSBURG...
INDEPENDENCE...WHITETOP...TROUTDALE...VOLNEY...GALAX...FLOYD...
NEW CASTLE...CLIFTON FORGE...COVINGTON...HOT SPRINGS...ROANOKE...
SALEM...FINCASTLE...LEXINGTON...BUENA VISTA
435 PM EST FRI FEB 21 2014

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS CANCELLED THE WIND
ADVISORY.

WINDS WILL DIMINISH THIS EVENING. GUSTS OF 25 TO 30 MPH ARE STILL
POSSIBLE...BUT MAINLY ALONG THE RIDGE TOPS.

$$

11

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 4:06 AM ESTSpecial Weather StatementRNKSmyth, Tazewell54 min
Feb 21, 4:22 AM ESTSevere Thunderstorm WarningRNKSmyth, Tazewell38 min
Feb 21, 6:17 AM ESTSpecial Weather StatementRNKAlleghany, Bath, City of Covington58 min
Feb 21, 8:31 AM ESTSevere Thunderstorm WarningRNKAlleghany, Bath, Botetourt, Rockbridge, City of Buena Vista, City of Lexington74 min
Feb 21, 8:45 AM ESTSevere Thunderstorm WarningRNKHenry, Pittsylvania, City of Martinsville60 min
Feb 21, 8:55 AM ESTAreal Flood AdvisoryRNKAmherst, Bath, Bedford, Botetourt, Floyd, Franklin and 7 more3 hr
Feb 21, 9:08 AM ESTSpecial Weather StatementRNKPittsylvania37 min
Feb 21, 9:23 AM ESTSpecial Weather StatementRNKAmherst, City of Lynchburg37 min
Feb 21, 9:33 AM ESTSpecial Weather StatementRNKCampbell, Charlotte, Halifax, Pittsylvania, City of Danville57 min
Feb 21, 9:53 AM ESTSpecial Weather StatementRNKAppomattox, Buckingham37 min

Nearby

Wind Advisories in Virginia, 2014Wind Advisories in North Carolina, 2014Every wind advisory in 2014

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.