Alert archive / Virginia / Wind Advisories in 2011

Wind Advisory 10, NWS Blacksburg, VA

February 21, 2011Alleghany County, Bath County, City of Covington, Virginia; Mercer County, Monroe County, Summers County, West Virginia

NWS Blacksburg, VA issued this wind advisory at Feb 21, 2011, 3:12 AM EST for Alleghany County, Bath County, City of Covington, Virginia; Mercer County, Monroe County, Summers County, West Virginia. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Feb 21, 2011, 3:12 AM EST (08:12 UTC)
Expired
Feb 21, 2011, 9:00 AM EST
In force
6 hr
Issued by
NWS Blacksburg, VA

Counties Alleghany County, VA, Bath County, VA, City of Covington, VA, Mercer County, WV, Monroe County, WV, Summers County, WV

The radar

The Roanoke radar (KFCX), 77 km from the middle of the area, began a volume at 08:12 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 00:00Z, 8.2 hours before the alert went out and 96 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 00:00Z on 2011-02-21Temperature 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, Roanoke, VA at 00:00Z on 2011-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 389 square meters per square second.1939587897117Sfc1 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
4504 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
389 m²/s²
0-3 km storm-relative helicity
538 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.

433 
WWUS71 KRNK 210812
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
312 AM EST MON FEB 21 2011

...STRONG WINDS ACROSS THE RIDGES THIS MORNING...

.WEST TO SOUTHWEST WINDS WILL QUICKLY INCREASE ALONG THE RIDGES
THIS MORNING AS WARM FRONT PASSES TO THE NORTH. WIND GUSTS TO 50
MPH MAY OCCUR.

VAZ019-020-WVZ042>045-211500-
/O.NEW.KRNK.WI.Y.0010.110221T0812Z-110221T1500Z/
ALLEGHANY VA-BATH-MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...CLIFTON FORGE...COVINGTON...
HOT SPRINGS...BLUEFIELD...FLAT TOP...HINTON...HIX...UNION...
LEWISBURG...QUINWOOD...DUO...RAINELLE
312 AM EST MON FEB 21 2011

...WIND ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM EST THIS MORNING. 

* LOCATIONS...MAINLY HIGHER ELEVATIONS AND WEST FACING SLOPES.

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

* TIMING...THROUGH MID MORNING.

* IMPACTS...WIND GUSTS MAY BRING DOWN TREES AND CAUSE POWER OUTAGES.

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
856 
WWUS71 KRNK 211400
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
900 AM EST MON FEB 21 2011

...WINDS GRADUALLY DIMINISHING TODAY...

.WINDY CONDITIONS WILL CONTINUE TODAY...BUT THE STRONGEST GUSTS
WILL REMAIN BELOW 40 MPH.

VAZ019-020-WVZ042>045-211500-
/O.CAN.KRNK.WI.Y.0010.000000T0000Z-110221T1500Z/
ALLEGHANY VA-BATH-MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...CLIFTON FORGE...COVINGTON...
HOT SPRINGS...BLUEFIELD...FLAT TOP...HINTON...HIX...UNION...
LEWISBURG...QUINWOOD...DUO...RAINELLE
900 AM EST MON FEB 21 2011

...WIND ADVISORY IS CANCELLED...

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

WEST TO SOUTHWEST WIND GUSTS HAVE DIMINISHED TO AROUND 40 MPH THIS
MORNING. THE 40 MPH GUSTS MAY CONTINUE MUCH OF THE DAY TODAY. 

$$

Nearby

Wind Advisories in Virginia, 2011Wind Advisories in West 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.