Alert archive / West Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

August 21, 2011Greenbrier County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 21, 2011, 7:45 PM EDT for Greenbrier County, West Virginia. It was in force for 60 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 21, 2011, 7:45 PM EDT (23:45 UTC)
Expired: Aug 21, 2011, 8:45 PM EDT
In force: 60 min
Issued by: NWS Blacksburg, VA

County Greenbrier County, WV

The radar

The Charleston,WV radar (KRLX), 111 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 130 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: 753 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 21, 4:07 PM EDT, 3 hours 38 minutes earlier.

Area forecast discussion, Aug 21, 4:07 PM EDT, 3 hours 38 minutes before

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Hazardous weather outlook, Aug 21, 6:55 PM EDT, 50 minutes before

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In the hours before

Local storm report, Aug 21, 4:19 PM EDT, 3 hours 26 minutes before

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Local storm report, Aug 21, 4:26 PM EDT, 3 hours 19 minutes before

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Local storm report, Aug 21, 4:46 PM EDT, 2 hours 59 minutes before

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Local storm report, Aug 21, 5:02 PM EDT, 2 hours 43 minutes before

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Local storm report, Aug 21, 5:23 PM EDT, 2 hours 22 minutes before

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Special weather statement, Aug 21, 7:45 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 21, 1:47 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell	43 min
Aug 21, 2:08 PM EDT	Special Weather Statement	RNK	Amherst, Appomattox	37 min
Aug 21, 2:11 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	64 min
Aug 21, 2:30 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania	60 min
Aug 21, 2:48 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell	57 min
Aug 21, 2:58 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham	50 min
Aug 21, 3:40 PM EDT	Special Weather Statement	RNK	Charlotte, Halifax, City of Danville	65 min
Aug 21, 3:02 PM EDT	Special Weather Statement	RNK	Stokes, Surry	58 min
Aug 21, 3:31 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes, Surry, Yadkin	59 min

Nearby

Special Weather Statements in West 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.