Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

February 22, 2012Watauga County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Feb 22, 2012, 9:29 PM EST for Watauga County, North Carolina. It was in force for 31 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: Feb 22, 2012, 9:29 PM EST (02:29 UTC)
Expired: Feb 22, 2012, 10:00 PM EST
In force: 31 min
Issued by: NWS Blacksburg, VA

County Watauga County, NC

The radar

The Knoxville radar (KMRX), 153 km from the middle of the area, began a volume at 02:29 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 00:00Z, 2.5 hours before the alert went out and 162 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: 8 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1522 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 240 m²/s²
0-3 km storm-relative helicity: 371 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Feb 22, 8:42 PM EST, 47 minutes earlier.

Area forecast discussion, Feb 22, 8:42 PM EST, 47 minutes before

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In the hours before

Special weather statement, Feb 22, 7:04 PM EST, 2 hours 25 minutes before

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Special weather statement, Feb 22, 7:55 PM EST, 1 hour 34 minutes before

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Special weather statement, Feb 22, 8:34 PM EST, 55 minutes before

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Special weather statement, Feb 22, 9:29 PM EST, 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
Feb 22, 7:04 PM EST	Special Weather Statement	RNK	Bland, Craig, Giles	56 min
Feb 22, 7:55 PM EST	Special Weather Statement	RNK	Botetourt, Craig, Giles	50 min
Feb 22, 9:19 PM EST	Areal Flood Advisory	RNK	Bland, Giles, Tazewell	3 hr
Feb 22, 10:00 PM EST	Special Weather Statement	RNK	Carroll, Patrick, City of Galax	60 min
Feb 22, 10:28 PM EST	Special Weather Statement	RNK	Henry, Patrick, City of Martinsville	32 min
Feb 23, 2:26 PM EST	Wind Advisory	RNK	Alleghany, Amherst, Appomattox, Bath, Bedford, Bland and 31 more	34 hr
Feb 22, 11:18 PM EST	Special Weather Statement	RNK	Caswell, Rockingham	27 min

Nearby

Special Weather Statements in North Carolina, 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.