Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

August 9, 201210 counties in Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 9, 2012, 10:31 PM EDT for 10 counties in Virginia. It was in force for 14 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 9, 2012, 10:31 PM EDT (02:31 UTC)
Expired: Aug 9, 2012, 10:45 PM EDT
In force: 14 min
Issued by: NWS Blacksburg, VA

Counties Alleghany County, VA, Bath County, VA, Botetourt County, VA, City of Covington, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Montgomery County, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 02:34 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.5 hours before the alert went out and 253 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: 349 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1386 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 9, 10:08 PM EDT, 23 minutes earlier.

Area forecast discussion, Aug 9, 10:08 PM EDT, 23 minutes before

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Hazardous weather outlook, Aug 9, 10:11 PM EDT, 20 minutes before

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In the hours before

Special weather statement, Aug 9, 8:27 PM EDT, 2 hours 4 minutes before

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Special weather statement, Aug 9, 8:37 PM EDT, 1 hour 54 minutes before

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Special weather statement, Aug 9, 8:43 PM EDT, 1 hour 48 minutes before

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Special weather statement, Aug 9, 9:23 PM EDT, 1 hour 8 minutes before

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Special weather statement, Aug 9, 9:53 PM EDT, 38 minutes before

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Special weather statement, Aug 9, 10:31 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 9, 8:27 PM EDT	Special Weather Statement	RNK	City of Roanoke	33 min
Aug 9, 8:43 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	32 min
Aug 9, 9:53 PM EDT	Special Weather Statement	RNK	Floyd, Montgomery, Patrick	52 min
Aug 9, 11:16 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Bedford, Botetourt, Rockbridge, City of Covington and 2 more	29 min
Aug 10, 12:17 AM EDT	Special Weather Statement	RNK	Pittsylvania, City of Danville	58 min
Aug 10, 12:19 AM EDT	Special Weather Statement	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	56 min
Aug 10, 12:39 AM EDT	Special Weather Statement	RNK	City of Lynchburg	66 min
Aug 10, 1:57 AM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, City of Lynchburg	63 min
Aug 10, 5:17 PM EDT	Special Weather Statement	RNK	Smyth	43 min
Aug 10, 5:26 PM EDT	Special Weather Statement	RNK	Rockbridge	49 min
Aug 10, 6:02 PM EDT	Special Weather Statement	RNK	Botetourt	43 min
Aug 10, 6:10 PM EDT	Special Weather Statement	RNK	Smyth	50 min
Aug 10, 6:24 PM EDT	Special Weather Statement	RNK	Rockbridge	66 min
Aug 10, 6:28 PM EDT	Special Weather Statement	RNK	Carroll	32 min
Aug 10, 6:39 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	56 min
Aug 10, 7:07 PM EDT	Special Weather Statement	RNK	Pulaski	24 hr
Aug 10, 7:38 PM EDT	Special Weather Statement	RNK	Pulaski
Aug 10, 7:44 PM EDT	Special Weather Statement	RNK	Pulaski
Aug 10, 7:45 PM EDT	Special Weather Statement	RNK	Pulaski	5 min
Aug 10, 7:54 PM EDT	Special Weather Statement	RNK	Carroll	36 min
Aug 9, 8:37 PM EDT	Special Weather Statement	RNK	Surry, Yadkin	53 min
Aug 9, 9:23 PM EDT	Special Weather Statement	RNK	Stokes	37 min
Aug 10, 4:39 PM EDT	Special Weather Statement	RNK	Wilkes	36 min
Aug 10, 11:45 AM EDT	Special Weather Statement	RNK	Greenbrier, Monroe, Summers	75 min
Aug 10, 4:23 PM EDT	Special Weather Statement	RNK	Greenbrier	22 min
Aug 10, 4:31 PM EDT	Special Weather Statement	RNK	Mercer	29 min
Aug 10, 4:50 PM EDT	Special Weather Statement	RNK	Monroe	25 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.