Alert archive / Virginia / Wind Advisories in 2012

Wind Advisory 4, NWS Blacksburg, VA

January 17, 2012Tazewell County, Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this wind advisory at Jan 17, 2012, 11:50 AM EST for Tazewell County, Virginia; Mercer County, West Virginia. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jan 17, 2012, 11:50 AM EST (16:50 UTC)
Expired: Jan 17, 2012, 6:28 PM EST
In force: 7 hr
Issued by: NWS Blacksburg, VA

Counties Tazewell County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 16:51 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, 4.8 hours before the alert went out and 163 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 972 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 360 m²/s²
0-3 km storm-relative helicity: 302 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.

495 
WWUS71 KRNK 171650
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
1150 AM EST TUE JAN 17 2012

...STRONGER WIND GUSTS EXPECTED THIS AFTERNOON INTO EARLY EVENING...

.SOUTHWEST WINDS WILL BE INCREASING AHEAD OF A FRONT THIS
AFTERNOON. SOME GUSTS OVER 45 MPH CAN BE ANTICIPATED ESPECIALLY
ALONG THE RIDGES AND INTO PORTIONS OF THE CLINCH RIVER VALLEY THAT
FACES SOUTHWEST TO NORTHEAST.


VAZ007-WVZ042-180100-
/O.NEW.KRNK.WI.Y.0004.120117T1650Z-120118T0200Z/
TAZEWELL-MERCER-
INCLUDING THE CITIES OF...TAZEWELL...BLUEFIELD...FLAT TOP
1150 AM EST TUE JAN 17 2012

...WIND ADVISORY IN EFFECT UNTIL 9 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 9 PM EST THIS EVENING. 

* LOCATIONS...HIGHER ELEVATIONS OF TAZEWELL AND MERCER COUNTY...AS
  WELL AS THE CLINCH RIVER VALLEY.

* HAZARDS...STRONG WIND GUSTS.

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

* TIMING...THROUGH EARLY EVENING.

* IMPACTS...DIFFICULT DRIVING CONDITIONS FOR HIGH PROFILE
  VEHICLES. LOOSE OUTDOOR OBJECTS WILL BE BLOWN AROUND...AND A FEW
  TREE LIMBS OR SMALL TREES COULD BE BLOWN DOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

1 follow-up statement

917 
WWUS71 KRNK 172328 AAA
NPWRNK

URGENT - WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE BLACKSBURG VA
628 PM EST TUE JAN 17 2012

...WINDS DIMINISHING EARLY THIS EVENING...


VAZ007-WVZ042-180030-
/O.CAN.KRNK.WI.Y.0004.000000T0000Z-120118T0200Z/
TAZEWELL-MERCER-
INCLUDING THE CITIES OF...TAZEWELL...BLUEFIELD...FLAT TOP
628 PM EST TUE JAN 17 2012

...WIND ADVISORY IS CANCELLED...

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

SOUTHWEST WINDS WILL CONTINUE TO DIMINISH THIS EVENING AND THEN
SHIFT TO THE WEST AS A COLD FRONT MOVES THROUGH. STRONGER WIND
GUSTS COULD REDEVELOP AFTER MIDNIGHT WHEN MUCH COLDER AIR ARRIVES
BUT SHOULD REMAIN BELOW ADVISORY LEVELS.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 3:29 PM EST	Special Weather Statement	RNK	Alleghany	61 min
Jan 17, 4:20 PM EST	Special Weather Statement	RNK	Bath	55 min
Jan 17, 4:28 PM EST	Special Weather Statement	RNK	Alleghany, Botetourt, Craig, City of Covington	62 min
Jan 17, 5:13 PM EST	Special Weather Statement	RNK	Alleghany, Amherst, Bath, Rockbridge, City of Buena Vista, City of Covington and 1 more	62 min
Jan 17, 5:24 PM EST	Special Weather Statement	RNK	Bedford, Botetourt, Craig, Roanoke, City of Roanoke, City of Salem	51 min
Jan 17, 5:42 PM EST	Special Weather Statement	RNK	Carroll, Floyd, Henry, Patrick, City of Galax, City of Martinsville	63 min
Jan 17, 6:39 PM EST	Special Weather Statement	RNK	Carroll, Floyd, Grayson, Halifax, Henry, Patrick and 5 more	51 min
Jan 17, 3:26 PM EST	Special Weather Statement	RNK	Greenbrier	49 min

Nearby

Wind Advisories in Virginia, 2012 Wind Advisories in West Virginia, 2012 Every 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.