Alert archive / Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

December 22, 20119 counties in Virginia; Alleghany County, Ashe County, Wilkes County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Dec 22, 2011, 11:39 PM EST for 9 counties in Virginia; Alleghany County, Ashe County, Wilkes County, North Carolina. It was in force for 51 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: Dec 22, 2011, 11:39 PM EST (04:39 UTC)
Expired: Dec 23, 2011, 12:30 AM EST
In force: 51 min
Issued by: NWS Blacksburg, VA

Counties Alleghany County, NC, Ashe County, NC, Wilkes County, NC, Bland County, VA, Carroll County, VA, City of Galax, VA, City of Radford, VA, Giles County, VA, Grayson County, VA, Montgomery County, VA, Pulaski County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 73 km from the middle of the area, began a volume at 04:40 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, 4.7 hours before the alert went out and 134 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: 27 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 457 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 278 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.

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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 Dec 22, 11:03 PM EST, 36 minutes earlier.

Area forecast discussion, Dec 22, 11:03 PM EST, 36 minutes before

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Hazardous weather outlook, Dec 22, 3:18 PM EST, 8 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
318 PM EST THU DEC 22 2011

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-232030-
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-
318 PM EST THU DEC 22 2011

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.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RCS

In the hours before

Special weather statement, Dec 22, 7:22 PM EST, 4 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
722 PM EST THU DEC 22 2011

NCZ001-018-VAZ007-009-010-012-015-WVZ042-230215-
ASHE NC-BLAND VA-GRAYSON VA-MERCER WV-SMYTH VA-TAZEWELL VA-WATAUGA
NC-WYTHE VA-
722 PM EST THU DEC 22 2011

...SHOWERS WITH WITH HEAVY RAIN WILL AFFECT
ASHE...BLAND...GRAYSON...MERCER...SMYTH...TAZEWELL...WATAUGA AND
WYTHE COUNTIES...

AT 715 PM EST...AN AREA OF MODERATE TO HEAVY SHOWERS WAS MOVING
NORTHEAST AT 60 MPH ACROSS THE AREA. EXPECT THE RAIN...HEAVY AT
TIMES...TO CONTINUE THROUGH AROUND 10 PM. STRONG WINDS ALOFT MAY MIX
DOWN TO THE SURFACE ACROSS THE HIGHER ELEVATIONS AND THE DOWN WIND
NORTH SLOPES. WINDS HAVE BEEN GUSTING UP TO 40 MPH IN TAZEWELL AND
ACROSS THE HIGHER RIDGES. WITH THE WET GROUND...IT IS POSSIBLE THAT
THESE WINDS MAY UPROOT A FEW TREES. THE WINDS AND RAIN SHOULD TAPER
OFF BY 10 PM.

LAT...LON 3635 8183 3635 8173 3657 8170 3663 8161
      3692 8184 3698 8179 3715 8191 3725 8174
      3721 8156 3728 8142 3746 8131 3760 8114
      3740 8087 3730 8093 3728 8101 3710 8095
      3695 8133 3623 8149 3611 8181 3629 8192

MC

Special weather statement, Dec 22, 8:21 PM EST, 3 hours 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
821 PM EST THU DEC 22 2011

NCZ002>004-019-020-VAZ016-017-032-033-230215-
ALLEGHANY NC-CARROLL VA-FLOYD VA-FRANKLIN VA-PATRICK VA-STOKES NC-
SURRY NC-WILKES NC-YADKIN NC-
821 PM EST THU DEC 22 2011

...LINE OF SHOWERS WITH HEAVY RAIN WILL AFFECT
ALLEGHANY...CARROLL...FLOYD...FRANKLIN...PATRICK...STOKES...SURRY...
WILKES AND YADKIN COUNTIES...

AT 817 PM EST...SHOWERS WITH HEAVY RAIN WERE ALONG A LINE FROM FANCY
GAP TO 5 MILES SOUTH OF WILBAR...MOVING NORTHEAST AT 60 MPH.

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

THESE SHOWERS WILL BE NEAR FANCY GAP...LOW GAP...WINDY GAP...AND
NORTH WILKESBORO AROUND 825 PM...WILLIS...LAMBSBURG...RONDA...AND
ROARING RIVER AROUND 830 PM...STATE ROAD AND AND ROARING GAP AROUND
835 PM.

THE PUBLIC IS ENCOURAGED TO RELAY REPORTS OF STRONG WINDS...HAIL OR
FLOODING TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3608 8137 3697 8042 3685 7999 3678 8003
      3679 8006 3678 8010 3670 8008 3626 8034
      3626 8044 3614 8044 3610 8050 3607 8051

SK

Special weather statement, Dec 22, 9:22 PM EST, 2 hours 17 minutes before

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Local storm report, Dec 22, 9:29 PM EST, 2 hours 10 minutes before

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Special weather statement, Dec 22, 11:39 PM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 22, 7:22 PM EST	Special Weather Statement	RNK	Bland, Smyth, Tazewell	113 min
Dec 22, 8:21 PM EST	Special Weather Statement	RNK	Floyd, Patrick	54 min
Dec 22, 9:22 PM EST	Special Weather Statement	RNK	Franklin, Henry, Patrick, City of Martinsville	53 min
Dec 23, 12:25 AM EST	Special Weather Statement	RNK	Botetourt, Carroll, Craig, Floyd, Montgomery, Patrick and 4 more	50 min
Dec 23, 12:59 AM EST	Special Weather Statement	RNK	Amherst, Bedford, Botetourt, Campbell, Franklin, Henry and 9 more	46 min
Dec 23, 1:59 AM EST	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, Charlotte	46 min

Nearby

Special Weather Statements in Virginia, 2011 Special Weather Statements in North Carolina, 2011 Every special weather statement in 2011

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.