Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 10, 2012Appomattox County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 10, 2012, 11:26 PM EDT for Appomattox County, Virginia. It was in force for 34 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, 11:26 PM EDT (03:26 UTC)
Expired: Aug 11, 2012, 12:00 AM EDT
In force: 34 min
Issued by: NWS Blacksburg, VA

County Appomattox County, VA

The radar

The Roanoke radar (KFCX), 139 km from the middle of the area, began a volume at 03:27 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, 3.4 hours before the alert went out and 177 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: 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, 1 hour 49 minutes earlier.

Area forecast discussion, Aug 10, 9:37 PM EDT, 1 hour 49 minutes before

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Hazardous weather outlook, Aug 10, 3:23 PM EDT, 8 hours 3 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, 9:40 PM EDT, 1 hour 46 minutes before

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Special weather statement, Aug 10, 9:54 PM EDT, 1 hour 32 minutes before

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Special weather statement, Aug 10, 10:23 PM EDT, 1 hour 3 minutes before

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Special weather statement, Aug 10, 10:38 PM EDT, 48 minutes before

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Special weather statement, Aug 10, 10:48 PM EDT, 38 minutes before

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Special weather statement, Aug 10, 11:26 PM EDT, 0 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 9:40 PM EDT	Special Weather Statement	RNK	City of Martinsville	35 min
Aug 10, 9:54 PM EDT	Special Weather Statement	RNK	Franklin	36 min
Aug 10, 10:38 PM EDT	Special Weather Statement	RNK	Campbell, City of Lynchburg	52 min
Aug 10, 11:59 PM EDT	Special Weather Statement	RNK	Franklin	61 min
Aug 11, 1:17 AM EDT	Special Weather Statement	RNK	Campbell	58 min
Aug 11, 2:30 AM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell	60 min
Aug 11, 5:14 AM EDT	Special Weather Statement	RNK	Halifax	61 min
Aug 11, 7:21 PM EDT	Special Weather Statement	RNK	City of Martinsville	39 min
Aug 11, 7:24 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	37 min
Aug 10, 9:17 PM EDT	Special Weather Statement	RNK	Wilkes	43 min
Aug 10, 9:48 PM EDT	Areal Flood Advisory	RNK	Wilkes	3 hr
Aug 10, 10:23 PM EDT	Special Weather Statement	RNK	Surry, Wilkes	37 min
Aug 10, 10:48 PM EDT	Special Weather Statement	RNK	Yadkin	27 min
Aug 11, 12:30 AM EDT	Special Weather Statement	RNK	Stokes, Yadkin	60 min
Aug 11, 1:14 AM EDT	Areal Flood Advisory	RNK	Stokes, Surry, Yadkin	4 hr
Aug 11, 5:01 AM EDT	Special Weather Statement	RNK	Wilkes	59 min
Aug 11, 5:17 AM EDT	Severe Thunderstorm Warning	RNK	Watauga, Wilkes	36 min
Aug 11, 1:30 PM EDT	Special Weather Statement	RNK	Caswell	30 min
Aug 11, 2:08 PM EDT	Special Weather Statement	RNK	Caswell	52 min
Aug 11, 6:05 PM EDT	Special Weather Statement	RNK	Rockingham	25 min
Aug 11, 6:34 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	41 min

Nearby

Special Weather Statements in Virginia, 2012 Every 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.