Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 20, 20124 counties in Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 20, 2012, 2:12 PM EDT for 4 counties in Virginia. It was in force for 18 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 20, 2012, 2:12 PM EDT (18:12 UTC)
Expired: Aug 20, 2012, 2:30 PM EDT
In force: 18 min
Issued by: NWS Blacksburg, VA

Counties Bedford County, VA, City of Lynchburg, VA, Franklin County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 49 km from the middle of the area, began a volume at 18:15 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 12:00Z, 6.2 hours before the alert went out and 23 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: 141 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 49 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 Aug 20, 1:54 PM EDT, 18 minutes earlier.

Area forecast discussion, Aug 20, 1:54 PM EDT, 18 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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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 20, 4:39 AM EDT, 9 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
439 AM EDT MON AUG 20 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-210845-
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-
439 AM EDT MON AUG 20 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.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

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 20, 1:03 PM EDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
103 PM EDT MON AUG 20 2012

VAZ022-023-033-034-201800-
BEDFORD VA-BOTETOURT VA-FRANKLIN VA-ROANOKE VA-
103 PM EDT MON AUG 20 2012

...A STRONG THUNDERSTORM WILL AFFECT BEDFORD...BOTETOURT...FRANKLIN
AND ROANOKE COUNTIES...

AT 102 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER ROANOKE...
MOVING EAST AT 15 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL 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 ROANOKE...AND DALEVILLE AROUND 110 PM...
CLOVERDALE...AND ROANOKE MOUNTAIN AROUND 115 PM...TROUTVILLE AROUND
120 PM...VINTON AROUND 125 PM...LAYMANTOWN AROUND 130 PM AND BLUE
RIDGE AROUND 135 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3742 7951 3713 7960 3720 8011 3742 8006

KK

Special weather statement, Aug 20, 1:05 PM EDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
105 PM EDT MON AUG 20 2012

VAZ020-024-WVZ045-201800-
BATH VA-GREENBRIER WV-ROCKBRIDGE VA-
105 PM EDT MON AUG 20 2012

...SHOWERS AND THUNDERSTORMS WILL AFFECT BATH...GREENBRIER AND
ROCKBRIDGE COUNTIES...

AT 102 PM EDT...SHOWERS AND THUNDERSTORMS WERE ALONG A LINE FROM 15
MILES NORTH OF WARM SPRINGS TO 7 MILES NORTHEAST OF NEOLA...MOVING
EAST AT 15 MPH.

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

THESE STORMS WILL BE NEAR MOUNTAIN GROVE AROUND 120 PM...LAKE MOOMAW
AROUND 135 PM...BACOVA JUNCTION AROUND 145 PM...INGALLS FIELD AROUND
150 PM...BURNSVILLE AROUND 155 PM AND WARM SPRINGS AROUND 200 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3822 7970 3820 7954 3816 7952 3817 7944
      3809 7948 3794 7924 3782 7943 3791 7991
      3795 7993 3794 8007 3797 8022 3807 8010
      3807 7997 3810 7994 3813 7995 3818 7992
      3824 7985 3827 7978

KK

Special weather statement, Aug 20, 2:12 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
212 PM EDT MON AUG 20 2012

VAZ032>034-043-045-201830-
BEDFORD VA-CAMPBELL VA-FRANKLIN VA-HENRY VA-PATRICK VA-
212 PM EDT MON AUG 20 2012

...SHOWERS WITH HEAVY RAIN WILL AFFECT BEDFORD...CAMPBELL...
FRANKLIN...HENRY AND PATRICK COUNTIES...

AT 206 PM EDT...SHOWERS WITH HEAVY RAIN...AND ISOLATED
THUNDERSTORMS...WERE ALONG A LINE FROM 4 MILES SOUTH OF BIG ISLAND
TO 7 MILES NORTHWEST OF STUART...MOVING EAST AT 15 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS AND STORMS.
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 ROCKY MOUNT AROUND 220 PM...MONETA AROUND
225 PM AND FAIRY STONE STATE PARK AROUND 230 PM.

LAT...LON 3664 8052 3754 7939 3747 7918 3743 7914
      3741 7913 3654 8023

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 1:03 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	57 min
Aug 20, 1:05 PM EDT	Special Weather Statement	RNK	Bath	55 min
Aug 20, 2:15 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, City of Covington	15 min
Aug 20, 2:48 PM EDT	Special Weather Statement	RNK	Henry, Patrick, City of Lynchburg, City of Martinsville	42 min
Aug 20, 3:34 PM EDT	Special Weather Statement	RNK	Campbell, Henry, City of Martinsville	26 min
Aug 20, 4:01 PM EDT	Special Weather Statement	RNK	Campbell, Henry, Pittsylvania, City of Martinsville	29 min
Aug 20, 4:30 PM EDT	Special Weather Statement	RNK	Pittsylvania	30 min
Aug 20, 4:32 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	28 min
Aug 20, 5:01 PM EDT	Special Weather Statement	RNK	Charlotte, Halifax, City of Danville	29 min
Aug 20, 5:04 PM EDT	Special Weather Statement	RNK	City of Buena Vista	26 min
Aug 20, 5:33 PM EDT	Special Weather Statement	RNK	Charlotte	27 min
Aug 20, 7:58 PM EDT	Areal Flood Advisory	RNK	Patrick	3 hr
Aug 20, 5:34 PM EDT	Special Weather Statement	RNK	Stokes	26 min
Aug 20, 6:14 PM EDT	Special Weather Statement	RNK	Rockingham	46 min
Aug 20, 6:35 PM EDT	Special Weather Statement	RNK	Surry	25 min
Aug 20, 7:10 PM EDT	Special Weather Statement	RNK	Rockingham	35 min
Aug 20, 7:20 PM EDT	Special Weather Statement	RNK	Stokes	25 min
Aug 20, 7:47 PM EDT	Special Weather Statement	RNK	Stokes	28 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.