Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 11, 2012Caswell County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Aug 11, 2012, 2:08 PM EDT for Caswell County, North Carolina. It was in force for 52 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 11, 2012, 2:08 PM EDT (18:08 UTC)
Expired: Aug 11, 2012, 3:00 PM EDT
In force: 52 min
Issued by: NWS Blacksburg, VA

County Caswell County, NC

The radar

The Roanoke radar (KFCX), 108 km from the middle of the area, began a volume at 18:09 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, 6.1 hours before the alert went out and 50 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: 509 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 762 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 11, 1:56 PM EDT, 12 minutes earlier.

Area forecast discussion, Aug 11, 1:56 PM EDT, 12 minutes before

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Hazardous weather outlook, Aug 11, 4:37 AM EDT, 9 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
437 AM EDT SAT AUG 11 2012

NCZ001>006-018>020-VAZ015>017-032-033-043>047-058-059-120845-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-GRAYSON-CARROLL-FLOYD-PATRICK-FRANKLIN-HENRY-PITTSYLVANIA-
CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
437 AM EDT SAT AUG 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH
CENTRAL VIRGINIA...SOUTHWEST VIRGINIA AND WEST CENTRAL VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

CLUSTERS OF THUNDERSTORMS COULD PRODUCE STRONG WINDS ALONG WITH
HAIL AND VERY HEAVY RAINFALL THROUGH LATE THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

VAZ007-009>014-018>020-022>024-034-035-WVZ042>045-120845-
TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-CRAIG-
ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-BEDFORD-AMHERST-
MERCER-SUMMERS-MONROE-GREENBRIER-
437 AM EDT SAT AUG 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR 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...SUNDAY THROUGH FRIDAY.

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 11, 1:30 PM EDT, 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
130 PM EDT SAT AUG 11 2012

NCZ006-111800-
CASWELL NC-
130 PM EDT SAT AUG 11 2012

...A STRONG THUNDERSTORM WILL AFFECT CASWELL COUNTY...

AT 126 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER PROSPECT
HILL...MOVING NORTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED 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.
EXPECT FREQUENT CLOUD TO GROUND LIGHTNING FROM THIS STORM. DO NOT
STAY IN THE OPEN OR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.

THIS STORM WILL BE NEAR LEASBURG AROUND 155 PM.

LAT...LON 3624 7928 3643 7915 3643 7914 3629 7914
      3625 7915 3624 7916 3624 7925

DS

Special weather statement, Aug 11, 2:08 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
208 PM EDT SAT AUG 11 2012

NCZ005-006-111900-
CASWELL NC-ROCKINGHAM NC-
208 PM EDT SAT AUG 11 2012

...A THUNDERSTORMS WITH HEAVY RAINFALL WILL CONTINUE TO AFFECT
CASWELL AND ROCKINGHAM COUNTIES...

AT 205 PM EDT...SCATTERED THUNDERSTORMS HAD MOVED JUST EAST OF
CASWELL COUNTY AND HAD PRODUCE A QUICK 1 TO TWO INCHES OF RAIN IN
ABOUT AN HOUR ACROSS FAR SOUTHEAST CASWELL COUNTY. MEANWHILE...ADDITIONAL
SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST FROM NEAR GREENSBORO
AND MAY MOVE OVER SOUTHERN PORTIONS OF ROCKINGHAM COUNTY AND
SOUTHERN CASWELL COUNTY...CAUSING ADDITIONAL HEAVY RAINFALL.

THIS HEAVY RAIN WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL
ROADSIDE DITCHES AND SMALL STREAMS.

THIS NEXT STORM WILL BE NEAR CAMP SPRINGS AROUND 220 PM...JERICHO
AROUND 250 PM...BAYNES AROUND 255 PM AND HIGHTOWERS AROUND 300 PM.

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

LAT...LON 3624 7975 3626 7976 3654 7917 3654 7914
      3648 7913 3629 7914 3624 7916 3625 7953
      3624 7954 3624 7963

SK

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, 11:26 PM EDT	Special Weather Statement	RNK	Appomattox	34 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, 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 North Carolina, 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.