Alert archive / Virginia / Wind Advisories in 2009

Wind Advisory 13, NWS Blacksburg, VA

April 22, 200922 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina

NWS Blacksburg, VA issued this wind advisory at Apr 22, 2009, 1:14 PM EDT for 22 counties in Virginia; Alleghany County, Ashe County, Watauga County, North Carolina. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Apr 22, 2009, 1:14 PM EDT (17:14 UTC)
Expired
Apr 22, 2009, 9:00 PM EDT
In force
8 hr
Issued by
NWS Blacksburg, VA
All 25 counties

Alleghany County, NC, Ashe County, NC, Watauga County, NC, Alleghany County, VA, Amherst County, VA, Bath County, VA, Bedford 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, Franklin County, VA, Grayson County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 19 km from the middle of the area, began a volume at 17:14 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

Roanoke, VA (KRNK), launched 12:00Z, 5.2 hours before the alert went out and 66 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 2009-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 2009-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -40 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
4 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1269 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-40 m²/s²
0-3 km storm-relative helicity
-68 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.

000 
WWUS71 KRNK 221714
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
114 PM EDT WED APR 22 2009


NCZ001-002-018-VAZ013>020-022>024-032>035-230100-
/O.NEW.KRNK.WI.Y.0013.090422T1714Z-090423T0100Z/
ASHE-ALLEGHANY NC-WATAUGA-PULASKI-MONTGOMERY-GRAYSON-CARROLL-
FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
PULASKI...RADFORD...BLACKSBURG...INDEPENDENCE...WHITETOP...
TROUTDALE...VOLNEY...GALAX...FLOYD...NEW CASTLE...CLIFTON FORGE...
HOT SPRINGS...ROANOKE...SALEM...FINCASTLE...LEXINGTON...STUART...
ROCKY MOUNT...BEDFORD...AMHERST
114 PM EDT WED APR 22 2009

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

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

WEST TO NORTHWEST WINDS WILL BE INCREASING THIS AFTERNOON AS HIGH
PRESSURE MOVES INTO THE OHIO VALLEY...BEHIND A STRONG AREA OF LOW
PRESSURE OFF THE NEW ENGLAND COAST. GUSTS AROUND 45 MPH ARE POSSIBLE
THIS AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED 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
000 
WWUS71 KRNK 230046
NPWRNK

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BLACKSBURG VA
846 PM EDT WED APR 22 2009

...WINDS WILL GRADUALLY DIMINISH OVERNIGHT...

NCZ001-002-018-VAZ013>020-022>024-032>035-230200-
/O.EXP.KRNK.WI.Y.0013.000000T0000Z-090423T0100Z/
ASHE-ALLEGHANY NC-WATAUGA-PULASKI-MONTGOMERY-GRAYSON-CARROLL-
FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-
INCLUDING THE CITIES OF...WEST JEFFERSON...SPARTA...BOONE...
PULASKI...RADFORD...BLACKSBURG...INDEPENDENCE...WHITETOP...
TROUTDALE...VOLNEY...GALAX...FLOYD...NEW CASTLE...CLIFTON FORGE...
HOT SPRINGS...ROANOKE...SALEM...FINCASTLE...LEXINGTON...STUART...
ROCKY MOUNT...BEDFORD...AMHERST
846 PM EDT WED APR 22 2009

...WIND ADVISORY WILL EXPIRE AT 9 PM EDT THIS EVENING...

THE WIND ADVISORY WILL EXPIRE AT 9 PM EDT THIS EVENING. 

EXPECT WEST WINDS AT 5 TO 15 MPH OVERNIGHT WITH GUSTS UP TO 30
MPH. 

$$

AMS

Nearby

Wind Advisories in Virginia, 2009Wind Advisories in North Carolina, 2009Every wind advisory in 2009

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.