Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

August 11, 2011Rockingham County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Aug 11, 2011, 6:04 PM EDT for Rockingham County, North Carolina. It was in force for 26 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, 2011, 6:04 PM EDT (22:04 UTC)
Expired: Aug 11, 2011, 6:30 PM EDT
In force: 26 min
Issued by: NWS Blacksburg, VA

County Rockingham County, NC

The radar

The Roanoke radar (KFCX), 86 km from the middle of the area, began a volume at 22:07 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, 10.1 hours before the alert went out and 24 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: 2 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1602 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -103 m²/s²
0-3 km storm-relative helicity: -69 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 11, 6:00 PM EDT, 4 minutes earlier.

Area forecast discussion, Aug 11, 6:00 PM EDT, 4 minutes before

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Hazardous weather outlook, Aug 11, 9:00 AM EDT, 9 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
900 AM EDT THU AUG 11 2011

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-121300-
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-
900 AM EDT THU AUG 11 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...TODAY AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

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

AN UNSEASONABLY STRONG COLD FRONT WILL APPROACH OUR REGION ON
SATURDAY...TRIGGERING WIDESPREAD SHOWERS AND THUNDERSTORMS.
PROLONGED EPISODES OF HEAVY RAIN WILL BE POSSIBLE FROM SATURDAY
AFTERNOON THROUGH SUNDAY MORNING...WHICH MAY LEAD TO LOCALIZED
FLASH FLOODING DURING THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RCS

In the hours before

Special weather statement, Aug 11, 4:03 PM EDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
403 PM EDT THU AUG 11 2011

NCZ004-VAZ032-112030-
PATRICK VA-STOKES NC-
403 PM EDT THU AUG 11 2011

...A STRONG THUNDERSTORM WILL AFFECT PATRICK AND STOKES COUNTIES...

AT 359 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTH OF
FRANCISCO...MOVING EAST AT 15 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.

THIS STORM WILL BE NEAR COLLINSTOWN AROUND 410 PM.

LAT...LON 3658 8020 3649 8027 3656 8045 3661 8042

DS

Special weather statement, Aug 11, 4:16 PM EDT, 1 hour 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
416 PM EDT THU AUG 11 2011

NCZ003-VAZ032-112045-
PATRICK VA-SURRY NC-
416 PM EDT THU AUG 11 2011

...A STRONG THUNDERSTORM WILL AFFECT PATRICK AND SURRY COUNTIES...

AT 412 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF ARARAT...MOVING SOUTHEAST AT 15 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.

THIS STORM WILL BE NEAR WOODVILLE AROUND 440 PM.

LAT...LON 3656 8062 3656 8061 3659 8062 3662 8060
      3656 8039 3655 8039 3655 8044 3649 8044
      3647 8046

DS

Special weather statement, Aug 11, 4:59 PM EDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
459 PM EDT THU AUG 11 2011

VAZ032-043-112130-
HENRY VA-PATRICK VA-
459 PM EDT THU AUG 11 2011

...STRONG THUNDERSTORMS WILL AFFECT HENRY AND PATRICK COUNTIES...

AT 458 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM STUART TO
SPENCER...MOVING EAST AT 25 MPH.

WIND GUSTS TO 30 MPH AND PEA-SIZED 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 SPENCER AROUND 505 PM...CRITZ AROUND 510
PM...HORSE PASTURE AROUND 515 PM AND MARTINSVILLE AIRPORT AROUND 525
PM.

LAT...LON 3667 8007 3663 7972 3657 8003 3662 8037

DS

Local storm report, Aug 11, 5:35 PM EDT, 29 minutes before

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Special weather statement, Aug 11, 5:53 PM EDT, 11 minutes before

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Special weather statement, Aug 11, 6:04 PM EDT, 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
Aug 11, 4:03 PM EDT	Special Weather Statement	RNK	Patrick	27 min
Aug 11, 4:59 PM EDT	Special Weather Statement	RNK	Henry	31 min
Aug 11, 5:10 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick, City of Martinsville	50 min
Aug 11, 5:53 PM EDT	Special Weather Statement	RNK	City of Danville	37 min
Aug 11, 6:24 PM EDT	Special Weather Statement	RNK	Pittsylvania	36 min
Aug 11, 7:26 PM EDT	Special Weather Statement	RNK	City of Martinsville	34 min
Aug 11, 1:19 PM EDT	Special Weather Statement	RNK	Wilkes, Yadkin	56 min
Aug 11, 1:37 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	68 min
Aug 11, 3:25 PM EDT	Special Weather Statement	RNK	Surry	35 min
Aug 11, 3:50 PM EDT	Special Weather Statement	RNK	Surry	25 min
Aug 11, 4:16 PM EDT	Special Weather Statement	RNK	Surry	29 min
Aug 11, 7:20 PM EDT	Special Weather Statement	RNK	Yadkin	40 min

Nearby

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.