Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 14, 2012Rockbridge County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 14, 2012, 10:08 PM EDT for Rockbridge County, Virginia. It was in force for 67 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 14, 2012, 10:08 PM EDT (02:08 UTC)
Expired: Aug 14, 2012, 11:15 PM EDT
In force: 67 min
Issued by: NWS Blacksburg, VA

County Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 136 km from the middle of the area, began a volume at 02:11 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

Roanoke, VA (KRNK), launched 00:00Z, 2.1 hours before the alert went out and 85 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: 964 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1210 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

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 14, 7:48 PM EDT, 2 hours 20 minutes earlier.

Area forecast discussion, Aug 14, 7:48 PM EDT, 2 hours 20 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, Aug 14, 3:24 PM EDT, 6 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
324 PM EDT TUE AUG 14 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-151930-
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-
324 PM EDT TUE AUG 14 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 COULD BE A FEW STRONG TO SEVERE THUNDERSTORMS LATE THIS
AFTERNOON INTO THE EVENING. THE MAIN THREAT WILL BE DAMAGING WIND
GUSTS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 14, 4:47 PM EDT, 5 hours 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
447 PM EDT TUE AUG 14 2012

VAZ014-017-142145-
FLOYD VA-MONTGOMERY VA-
447 PM EDT TUE AUG 14 2012

...A STRONG THUNDERSTORM WILL AFFECT FLOYD AND MONTGOMERY COUNTIES...

AT 445 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER INDIAN
VALLEY...MOVING NORTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR WILLIS AROUND 455 PM...COPPER VALLEY AROUND
500 PM...ALUM RIDGE AROUND 505 PM...FLOYD AROUND 520 PM AND PILOT
AROUND 530 PM.

LAT...LON 3693 8064 3694 8061 3694 8059 3696 8058
      3697 8055 3701 8055 3714 8038 3690 8020
      3682 8054

16

Special weather statement, Aug 14, 6:51 PM EDT, 3 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
651 PM EDT TUE AUG 14 2012

VAZ024-142330-
ROCKBRIDGE VA-
651 PM EDT TUE AUG 14 2012

...A STRONG THUNDERSTORM WILL AFFECT ROCKBRIDGE COUNTY...

AT 650 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER GOSHEN...
MOVING NORTHEAST AT 15 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR ROCKBRIDGE BATHS AROUND 700 PM...BELLS VALLEY
AROUND 705 PM...FAIRFIELD AROUND 715 PM AND BROWNSBURG AROUND 720 PM.

LAT...LON 3797 7928 3793 7920 3789 7915 3786 7914
      3785 7914 3784 7955 3793 7961 3799 7955
      3803 7952 3805 7952 3809 7947

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 2:16 PM EDT	Special Weather Statement	RNK	Bland, Wythe	29 min
Aug 15, 3:27 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Danville	43 min
Aug 15, 12:38 PM EDT	Special Weather Statement	RNK	Ashe, Watauga	37 min
Aug 15, 4:44 PM EDT	Special Weather Statement	RNK	Rockingham	61 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.