Alert archive / Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

May 15, 2011Charlotte County, Halifax County, Virginia

NWS Blacksburg, VA issued this special weather statement at May 15, 2011, 5:51 PM EDT for Charlotte County, Halifax County, Virginia. It was in force for 54 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: May 15, 2011, 5:51 PM EDT (21:51 UTC)
Expired: May 15, 2011, 6:45 PM EDT
In force: 54 min
Issued by: NWS Blacksburg, VA

Counties Charlotte County, VA, Halifax County, VA

The radar

The Raleigh/Durham radar (KRAX), 137 km from the middle of the area, began a volume at 21:52 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 12:00Z, 9.9 hours before the alert went out and 256 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: 55 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 50 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 May 15, 3:55 PM EDT, 1 hour 56 minutes earlier.

Area forecast discussion, May 15, 3:55 PM EDT, 1 hour 56 minutes before

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Hazardous weather outlook, May 15, 3:41 AM EDT, 14 hours 10 minutes before

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In the hours before

Special weather statement, May 15, 3:37 PM EDT, 2 hours 14 minutes before

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Special weather statement, May 15, 4:31 PM EDT, 1 hour 20 minutes before

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Special weather statement, May 15, 5:01 PM EDT, 50 minutes before

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Special weather statement, May 15, 5:08 PM EDT, 43 minutes before

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Special weather statement, May 15, 5:48 PM EDT, 3 minutes before

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Special weather statement, May 15, 5:51 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
May 14, 8:01 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	59 min
May 14, 9:23 PM EDT	Special Weather Statement	RNK	Patrick	67 min
May 14, 10:20 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	55 min
May 14, 10:49 PM EDT	Special Weather Statement	RNK	Franklin	56 min
May 14, 11:45 PM EDT	Special Weather Statement	RNK	Campbell	60 min
May 15, 2:31 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Charlotte	59 min
May 15, 3:37 PM EDT	Special Weather Statement	RNK	Charlotte	53 min
May 15, 5:01 PM EDT	Special Weather Statement	RNK	City of Danville	59 min
May 15, 5:08 PM EDT	Special Weather Statement	RNK	Appomattox	67 min
May 15, 5:48 PM EDT	Special Weather Statement	RNK	Buckingham	57 min
May 15, 6:19 PM EDT	Special Weather Statement	RNK	Patrick	56 min
May 15, 7:23 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	67 min
May 14, 9:16 PM EDT	Special Weather Statement	RNK	Yadkin	59 min
May 15, 2:45 AM EDT	Special Weather Statement	RNK	Rockingham	45 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.