Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 10, 2012Franklin County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 10, 2012, 11:59 PM EDT for Franklin County, Virginia. It was in force for 61 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 10, 2012, 11:59 PM EDT (03:59 UTC)
Expired
Aug 11, 2012, 1:00 AM EDT
In force
61 min
Issued by
NWS Blacksburg, VA

County Franklin County, VA

The radar

The Roanoke radar (KFCX), 62 km from the middle of the area, began a volume at 04:01 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, 4.0 hours before the alert went out and 110 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 2012-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 781 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, Greensboro/Hi Pt, NC at 00:00Z on 2012-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.19395878Sfc1 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
781 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Aug 10, 9:37 PM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, Aug 10, 9:37 PM EDT, 2 hours 22 minutes before
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Hazardous weather outlook, Aug 10, 3:23 PM EDT, 8 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
323 PM EDT FRI AUG 10 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-111930-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE-
GREENBRIER-
323 PM EDT FRI AUG 10 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH
CENTRAL VIRGINIA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING AND
TONIGHT AS BANDS OR CLUSTERS OF THUNDERSTORMS DEVELOP AHEAD OF A
COLD FRONT THAT WILL PASS ACROSS OUR AREA BEGINNING THIS EVENING.
SOME OF THESE STORMS WILL BE CAPABLE OF PRODUCING LOCALLY GUSTY
WINDS...AS WELL AS POCKETS OF HEAVY RAIN WHERE STORMS BECOME SLOW
MOVING OR TRAIN OVER THE SAME LOCATIONS REPEATEDLY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 10, 9:54 PM EDT, 2 hours 5 minutes before
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Special weather statement, Aug 10, 10:23 PM EDT, 1 hour 36 minutes before
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Special weather statement, Aug 10, 10:38 PM EDT, 1 hour 21 minutes before
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Special weather statement, Aug 10, 10:48 PM EDT, 1 hour 11 minutes before
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Special weather statement, Aug 10, 11:26 PM EDT, 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1126 PM EDT FRI AUG 10 2012

VAZ046-110400-
APPOMATTOX VA-
1126 PM EDT FRI AUG 10 2012

...A STRONG THUNDERSTORM WILL AFFECT APPOMATTOX COUNTY...

AT 1120 PM EDT...A STRONG THUNDERSTORM WAS LOCATED EAST OF
LYNCHBURG...OVER CONCORD...MOVING EAST AT 25 MPH.

WIND GUSTS TO 30 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.
EXPECT FREQUENT CLOUD TO GROUND LIGHTNING FROM THIS STORM. FOR YOUR
SAFETY...REMAIN INDOORS AND AWAY FROM WINDOWS UNTIL THIS STORM HAS
PASSED.

THIS STORM WILL BE NEAR SPOUT SPRING AROUND 1130 PM...APPOMATTOX
AROUND 1145 PM...APPOMATTOX NATIONAL HISTORIC PARK AROUND 1155 PM AND
HIXBURG AROUND MIDNIGHT.

LAT...LON 3729 7894 3730 7895 3739 7900 3751 7876
      3745 7870 3743 7868 3742 7864 3739 7863
      3740 7859 3734 7859
Special weather statement, Aug 10, 11:59 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1159 PM EDT FRI AUG 10 2012

VAZ033-034-044-110500-
BEDFORD VA-FRANKLIN VA-PITTSYLVANIA VA-
1159 PM EDT FRI AUG 10 2012

...A STRONG THUNDERSTORM WILL AFFECT BEDFORD...FRANKLIN AND
PITTSYLVANIA COUNTIES...INCLUDING SMITH MOUNTAIN LAKE...

AT 1155 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTHWEST
OF SYDNORSVILLE...MOVING NORTHEAST AT 25 MPH.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THIS STORM...IN ADDITION TO
VERY HEAVY RAIN. WATER WILL POND ON ROADS AND QUICKLY FILL ROADSIDE
DITCHES. EXPECT FREQUENT CLOUD TO GROUND LIGHTNING FROM THIS STORM.
DO NOT STAY IN THE OPEN.  THIS STORM IS HEADED FOR SMITH MOUNTAIN
LAKE.  BOATERS SHOULD SEEK SHELTER UNTIL THIS STORM HAS PASSED.

THIS STORM WILL BE NEAR SONTAG AROUND 1205 AM...SMITH MOUNTAIN LAKE
AND PENHOOK AROUND 1230 AM...AJAX AROUND 1240 AM...SMITH MOUNTAIN
LAKE STATE PARK AROUND 1245 AM AND MONETA AROUND 1255 AM.

LAT...LON 3682 7993 3694 8005 3730 7953 3714 7939
      3706 7944 3706 7941 3709 7941 3710 7937
      3712 7938 3712 7936 3708 7933 3681 7990

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 9:40 PM EDTSpecial Weather StatementRNKCity of Martinsville35 min
Aug 10, 9:54 PM EDTSpecial Weather StatementRNKFranklin36 min
Aug 10, 10:38 PM EDTSpecial Weather StatementRNKCampbell, City of Lynchburg52 min
Aug 10, 11:26 PM EDTSpecial Weather StatementRNKAppomattox34 min
Aug 11, 1:17 AM EDTSpecial Weather StatementRNKCampbell58 min
Aug 11, 2:30 AM EDTSpecial Weather StatementRNKAppomattox, Buckingham, Campbell60 min
Aug 11, 5:14 AM EDTSpecial Weather StatementRNKHalifax61 min
Aug 11, 7:21 PM EDTSpecial Weather StatementRNKCity of Martinsville39 min
Aug 11, 7:24 PM EDTSevere Thunderstorm WarningRNKHenry, City of Martinsville37 min
Aug 10, 9:17 PM EDTSpecial Weather StatementRNKWilkes43 min
Aug 10, 9:48 PM EDTAreal Flood AdvisoryRNKWilkes3 hr
Aug 10, 10:23 PM EDTSpecial Weather StatementRNKSurry, Wilkes37 min
Aug 10, 10:48 PM EDTSpecial Weather StatementRNKYadkin27 min
Aug 11, 12:30 AM EDTSpecial Weather StatementRNKStokes, Yadkin60 min
Aug 11, 1:14 AM EDTAreal Flood AdvisoryRNKStokes, Surry, Yadkin4 hr
Aug 11, 5:01 AM EDTSpecial Weather StatementRNKWilkes59 min
Aug 11, 5:17 AM EDTSevere Thunderstorm WarningRNKWatauga, Wilkes36 min
Aug 11, 1:30 PM EDTSpecial Weather StatementRNKCaswell30 min
Aug 11, 2:08 PM EDTSpecial Weather StatementRNKCaswell52 min
Aug 11, 6:05 PM EDTSpecial Weather StatementRNKRockingham25 min
Aug 11, 6:34 PM EDTSevere Thunderstorm WarningRNKRockingham, Stokes41 min

Nearby

Special Weather Statements in Virginia, 2012Every special weather statement 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.