Alert archive / Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Blacksburg, VA

March 18, 2017Craig County, Virginia; Monroe County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Mar 18, 2017, 3:21 PM EDT for Craig County, Virginia; Monroe County, West Virginia. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 18, 2017, 3:21 PM EDT (19:21 UTC)
Expired
Mar 18, 2017, 3:45 PM EDT
In force
24 min
Issued by
NWS Blacksburg, VA

Counties Craig County, VA, Monroe County, WV

The radar

The Roanoke radar (KFCX), 55 km from the middle of the area, began a volume at 19:25 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, 7.4 hours before the alert went out and 85 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 2017-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2017-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
477 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

274 
WWUS81 KRNK 181921
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
321 PM EDT SAT MAR 18 2017

VAZ018-019-WVZ044-181945-
Craig-Alleghany-Monroe-
321 PM EDT SAT MAR 18 2017

...A THUNDERSTORM WILL AFFECT SOUTHWESTERN ALLEGHANY COUNTY IN WEST 
CENTRAL VIRGINIA...CENTRAL CRAIG COUNTY IN SOUTHWESTERN VIRGINIA AND 
EAST CENTRAL MONROE COUNTIES IN SOUTHEASTERN WEST VIRGINIA...

At 320 PM EDT, a developing thunderstorm was located over Laurel 
Branch, moving east at 35 mph.

Expect heavy downpours, gusty wind, and possibly pea size hail
that may cover the ground.

Locations impacted include...
Union...
Paint Bank...
Sweet Springs...
Laurel Branch...
and Hollywood.

LAT...LON 3745 8012 3747 8051 3748 8051 3748 8062
      3759 8063 3767 8013
TIME...MOT...LOC 1920Z 266DEG 32KT 3754 8055 

$$

MBS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 17, 8:54 PM EDTSpecial Weather StatementRNKBotetourt, Craig, Giles, Montgomery, Pulaski, Roanoke and 3 more21 min
Mar 17, 9:23 PM EDTSpecial Weather StatementRNKBland, Floyd, Franklin, Montgomery, Pulaski, Tazewell and 2 more22 min
Mar 18, 2:13 PM EDTSpecial Weather StatementRNKGiles47 min
Mar 18, 2:23 PM EDTSpecial Weather StatementRNKBotetourt, Craig52 min
Mar 18, 2:25 PM EDTSpecial Weather StatementRNKAlleghany, City of Covington65 min
Mar 18, 2:43 PM EDTSpecial Weather StatementRNKBedford, Roanoke, City of Roanoke, City of Salem62 min
Mar 18, 2:46 PM EDTSpecial Weather StatementRNKGiles29 min
Mar 18, 2:59 PM EDTSpecial Weather StatementRNKMontgomery, Pulaski, City of Radford31 min
Mar 18, 3:02 PM EDTSpecial Weather StatementRNKBland, Wythe58 min
Mar 18, 3:09 PM EDTSpecial Weather StatementRNKAppomattox, Buckingham, Campbell, City of Lynchburg66 min
Mar 18, 3:27 PM EDTSpecial Weather StatementRNKBedford18 min
Mar 18, 3:28 PM EDTSpecial Weather StatementRNKCity of Roanoke17 min
Mar 18, 3:33 PM EDTSpecial Weather StatementRNKGiles12 min
Mar 18, 3:45 PM EDTSpecial Weather StatementRNKCharlotte30 min
Mar 18, 3:50 PM EDTSpecial Weather StatementRNKBedford25 min
Mar 18, 3:55 PM EDTSpecial Weather StatementRNKPulaski, City of Radford35 min
Mar 18, 3:59 PM EDTSpecial Weather StatementRNKPittsylvania16 min
Mar 18, 4:15 PM EDTSpecial Weather StatementRNKAppomattox, Buckingham, Campbell, Charlotte, Halifax, Pittsylvania60 min
Mar 18, 4:20 PM EDTSpecial Weather StatementRNKBotetourt, Craig25 min
Mar 18, 5:07 PM EDTSpecial Weather StatementRNKCity of Danville8 min
Mar 18, 5:09 PM EDTSpecial Weather StatementRNKBedford36 min
Mar 18, 5:14 PM EDTSpecial Weather StatementRNKCharlotte, Halifax, City of Danville46 min
Mar 18, 5:43 PM EDTSpecial Weather StatementRNKCity of Roanoke32 min
Mar 18, 5:46 PM EDTSpecial Weather StatementRNKAmherst, City of Buena Vista44 min
Mar 18, 6:08 PM EDTSpecial Weather StatementRNKHalifax22 min

Nearby

Special Weather Statements in Virginia, 2017Special Weather Statements in West Virginia, 2017Every special weather statement in 2017

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.