Alert archive / Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

July 6, 2011Halifax County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 6, 2011, 6:05 PM EDT for Halifax County, Virginia. It was in force for 10 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: Jul 6, 2011, 6:05 PM EDT (22:05 UTC)
Expired: Jul 6, 2011, 6:15 PM EDT
In force: 10 min
Issued by: NWS Blacksburg, VA

County Halifax County, VA

The radar

The Raleigh/Durham radar (KRAX), 104 km from the middle of the area, began a volume at 22:04 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, 10.1 hours before the alert went out and 96 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: 945 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Jul 6, 5:55 PM EDT, 10 minutes earlier.

Area forecast discussion, Jul 6, 5:55 PM EDT, 10 minutes before

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Hazardous weather outlook, Jul 6, 11:37 AM EDT, 6 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
1137 AM EDT WED JUL 6 2011

NCZ001>006-018>020-VAZ007-009-010-012>017-022>024-032>035-043>047-
058-059-071100-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-
FLOYD-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-FRANKLIN-BEDFORD-AMHERST-
HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
1137 AM EDT WED JUL 6 2011

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...THIS AFTERNOON AND TONIGHT.

WIDELY SCATTERED STRONG TO SEVERE THUNDERSTORMS PRODUCING HAIL AND
DAMAGING WINDS WILL BE POSSIBLE THROUGH THIS EVENING. IN
ADDITION...VERY HEAVY RAINFALL WILL ACCOMPANY SOME OF THE STORMS
RESULTING IN LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE THURSDAY
AND FRIDAY AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

VAZ011-018>020-WVZ042>045-071100-
GILES-CRAIG-ALLEGHANY VA-BATH-MERCER-SUMMERS-MONROE-GREENBRIER-
1137 AM EDT WED JUL 6 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST VIRGINIA...WEST
CENTRAL VIRGINIA AND SOUTHEAST WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED STRONG TO SEVERE THUNDERSTORMS PRODUCING HAIL AND DAMAGING
WINDS WILL BE POSSIBLE THROUGH THIS EVENING. IN ADDITION...VERY
HEAVY RAINFALL WILL ACCOMPANY SOME OF THE STORMS RESULTING IN
LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE THURSDAY
AND FRIDAY AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 6, 4:30 PM EDT, 1 hour 35 minutes before

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Special weather statement, Jul 6, 4:48 PM EDT, 1 hour 17 minutes before

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Special weather statement, Jul 6, 4:57 PM EDT, 1 hour 8 minutes before

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Local storm report, Jul 6, 4:59 PM EDT, 1 hour 6 minutes before

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Special weather statement, Jul 6, 6:04 PM EDT, 1 minute before

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Special weather statement, Jul 6, 6:05 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
Jul 6, 4:09 AM EDT	Special Weather Statement	RNK	Bedford, Franklin, City of Lynchburg	51 min
Jul 6, 12:22 PM EDT	Special Weather Statement	RNK	City of Roanoke	23 min
Jul 6, 12:23 PM EDT	Special Weather Statement	RNK	Henry	37 min
Jul 6, 12:34 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Roanoke	56 min
Jul 6, 12:56 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick	43 min
Jul 6, 1:12 PM EDT	Special Weather Statement	RNK	Franklin	33 min
Jul 6, 1:17 PM EDT	Special Weather Statement	RNK	City of Martinsville	28 min
Jul 6, 1:19 PM EDT	Special Weather Statement	RNK	Patrick	26 min
Jul 6, 1:25 PM EDT	Special Weather Statement	RNK	Franklin	35 min
Jul 6, 1:29 PM EDT	Special Weather Statement	RNK	Appomattox	31 min
Jul 6, 1:52 PM EDT	Special Weather Statement	RNK	City of Martinsville	23 min
Jul 6, 2:06 PM EDT	Flash Flood Warning	RNK	Roanoke, City of Roanoke, City of Salem	3 hr
Jul 6, 2:07 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Danville	32 min
Jul 6, 2:10 PM EDT	Special Weather Statement	RNK	Tazewell	35 min
Jul 6, 2:17 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham, Campbell, Charlotte	73 min
Jul 6, 2:25 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Roanoke, City of Roanoke, City of Salem	22 min
Jul 6, 2:38 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	67 min
Jul 6, 2:51 PM EDT	Severe Thunderstorm Warning	RNK	Smyth, Tazewell	54 min
Jul 6, 4:01 PM EDT	Special Weather Statement	RNK	Charlotte	29 min
Jul 6, 4:48 PM EDT	Special Weather Statement	RNK	Halifax	27 min
Jul 6, 6:46 PM EDT	Special Weather Statement	RNK	Halifax	14 min
Jul 6, 3:15 PM EDT	Severe Thunderstorm Warning	RNK	Surry	30 min
Jul 6, 4:15 PM EDT	Special Weather Statement	RNK	Stokes	30 min
Jul 6, 4:20 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Wilkes, Yadkin	34 min
Jul 6, 4:57 PM EDT	Special Weather Statement	RNK	Wilkes	18 min
Jul 6, 6:04 PM EDT	Special Weather Statement	RNK	Wilkes	41 min

Nearby

Special Weather Statements in Virginia, 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.