Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

September 6, 2012Franklin County, Virginia

NWS Blacksburg, VA issued this special weather statement at Sep 6, 2012, 2:50 PM EDT for Franklin County, Virginia. It was in force for 25 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: Sep 6, 2012, 2:50 PM EDT (18:50 UTC)
Expired: Sep 6, 2012, 3:15 PM EDT
In force: 25 min
Issued by: NWS Blacksburg, VA

County Franklin County, VA

The radar

The Roanoke radar (KFCX), 36 km from the middle of the area, began a volume at 19:00 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 12:00Z, 6.8 hours before the alert went out and 94 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: 843 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 Sep 6, 1:43 PM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Sep 6, 1:43 PM EDT, 1 hour 7 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Sep 6, 5:18 AM EDT, 9 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
518 AM EDT THU SEP 6 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-071000-
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-
518 AM EDT THU SEP 6 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...TODAY AND TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY RAIN
THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

A STRONG COLD FRONT ARRIVES SATURDAY AND COULD BRING SOME HEAVY
DOWNPOURS ALONG WITH AN ISOLATED THREAT FOR DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Sep 6, 12:40 PM EDT, 2 hours 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1240 PM EDT THU SEP 6 2012

NCZ005-006-VAZ044-058-061745-
ROCKINGHAM-CASWELL-PITTSYLVANIA-HALIFAX-
INCLUDING THE CITIES OF...EDEN...YANCEYVILLE...DANVILLE...
SOUTH BOSTON
1240 PM EDT THU SEP 6 2012

...THUNDERSTORMS WITH HEAVY RAIN EXPECTED THROUGH EARLY AFTERNOON...

THUNDERSTORMS WILL BE FIRING UP ALONG A LINE FROM
HALIFAX...SOUTHWEST TO REIDSVILLE EARLY THIS AFTERNOON. SOME OF
THE STORMS WILL BRING TORRENTIAL DOWNPOURS...CAUSING WATER TO POND
QUICKLY ON ROADS AND IN DITCHES. FREQUENT CLOUD TO GROUND
LIGHTNING IS ALSO EXPECTED ALONG WITH GUSTY WINDS. SOME LOCATIONS
THAT WILL BE IMPACTED THROUGH 200 PM INCLUDE...DANVILLE...SOUTH
BOSTON AND YANCEYVILLE.

Special weather statement, Sep 6, 1:35 PM EDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
135 PM EDT THU SEP 6 2012

VAZ058-061830-
HALIFAX VA-
135 PM EDT THU SEP 6 2012

...SLOW MOVING THUNDERSTORMS WILL AFFECT HALIFAX COUNTY...

AT 128 PM EDT...SLOW MOVING THUNDERSTORMS WERE LOCATED ACROSS
SOUTHERN HALIFAX COUNTY...MOVING EAST AT 5 MPH. THESE STORMS WILL BE
CAPABLE OF PRODUCING 1 TO 2 INCHES OF RAIN OVER A SHORT PERIOD OF
TIME...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL
ROADSIDE DITCHES AND SMALL STREAMS.

LAT...LON 3665 7870 3658 7871 3656 7873 3654 7872
      3654 7873 3654 7914 3654 7922 3662 7920
      3670 7917 3668 7869

16

Special weather statement, Sep 6, 2:50 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
250 PM EDT THU SEP 6 2012

VAZ032-033-043-061915-
FRANKLIN VA-HENRY VA-PATRICK VA-
250 PM EDT THU SEP 6 2012

...A STRONG THUNDERSTORM WILL AFFECT FRANKLIN...HENRY AND PATRICK
COUNTIES...

AT 242 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER FERRUM...
MOVING EAST AT 10 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR BASSETT AROUND 305 PM AND SYDNORSVILLE AROUND
315 PM.

LAT...LON 3701 7963 3674 7999 3679 8024 3707 7996

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 8:48 PM EDT	Special Weather Statement	RNK	Craig	42 min
Sep 6, 1:07 AM EDT	Special Weather Statement	RNK	Grayson, Smyth, Tazewell, Wythe	53 min
Sep 6, 1:35 PM EDT	Special Weather Statement	RNK	Halifax	55 min
Sep 6, 3:19 PM EDT	Special Weather Statement	RNK	City of Martinsville	41 min
Sep 6, 3:37 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	37 min
Sep 6, 12:23 AM EDT	Special Weather Statement	RNK	Alleghany, Ashe, Watauga, Wilkes	52 min
Sep 6, 1:18 AM EDT	Special Weather Statement	RNK	Alleghany, Ashe, Watauga, Wilkes	72 min
Sep 6, 3:50 PM EDT	Special Weather Statement	RNK	Caswell	40 min
Sep 6, 4:33 PM EDT	Special Weather Statement	RNK	Rockingham	27 min
Sep 6, 5:45 PM EDT	Special Weather Statement	RNK	Stokes, Surry, Wilkes, Yadkin	30 min
Sep 6, 6:37 PM EDT	Special Weather Statement	RNK	Yadkin	38 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.