Alert archive / Virginia / Special Weather Statements in 2015

Special Weather Statement, NWS Blacksburg, VA

August 5, 2015Henry County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 5, 2015, 9:21 PM EDT for Henry County, 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
Aug 5, 2015, 9:21 PM EDT (01:21 UTC)
Expired
Aug 5, 2015, 9:45 PM EDT
In force
24 min
Issued by
NWS Blacksburg, VA

County Henry County, VA

The radar

The Roanoke radar (KFCX), 49 km from the middle of the area, began a volume at 01:25 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.4 hours before the alert went out and 61 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, Greensboro/Hi Pt, NC at 00:00Z on 2015-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 351 joules per kilogram.LCLEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 2015-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
351 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
2387 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
20 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.

852 
WWUS81 KRNK 060121
SPSRNK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
921 PM EDT WED AUG 5 2015
 
VAZ032-043-060145-
HENRY-PATRICK-
921 PM EDT WED AUG 5 2015

...A STRONG THUNDERSTORM WILL AFFECT 
SOUTHEASTERN PATRICK AND SOUTHWESTERN HENRY COUNTIES...

AT 920 PM EDT...A STRONG THUNDERSTORM WAS NEAR CRITZ...MOVING EAST AT
20 MPH.

WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SPENCER...
PENNS STORE...
CRITZ...
PATRICK SPRINGS...
AND HORSE PASTURE. 

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 3659 8024 3671 7999 3654 7999 3654 8022
TIME...MOT...LOC 0120Z 250DEG 18KT 3657 8015 
$$

RS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 8:19 PM EDTSpecial Weather StatementRNKBland26 min
Aug 5, 8:38 PM EDTSpecial Weather StatementRNKBland37 min
Aug 5, 9:30 PM EDTSpecial Weather StatementRNKCity of Martinsville30 min
Aug 5, 10:07 PM EDTSpecial Weather StatementRNKFloyd, Montgomery38 min
Aug 5, 10:16 PM EDTSpecial Weather StatementRNKPittsylvania, City of Danville59 min
Aug 5, 10:42 PM EDTSpecial Weather StatementRNKHalifax63 min
Aug 5, 11:31 PM EDTSpecial Weather StatementRNKCampbell59 min
Aug 6, 12:00 AM EDTSpecial Weather StatementRNKCharlotte, Halifax60 min
Aug 6, 6:46 PM EDTSpecial Weather StatementRNKFloyd29 min
Aug 6, 7:26 PM EDTSpecial Weather StatementRNKPulaski34 min
Aug 5, 8:54 PM EDTSevere Thunderstorm WarningRNKRockingham, Stokes44 min
Aug 6, 6:15 PM EDTSpecial Weather StatementRNKWilkes30 min
Aug 6, 6:56 PM EDTSpecial Weather StatementRNKSurry34 min
Aug 6, 7:42 PM EDTSpecial Weather StatementRNKRockingham33 min

Nearby

Special Weather Statements in Virginia, 2015Every special weather statement in 2015

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.