Alert archive / Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Blacksburg, VA

August 12, 2017Pulaski County, City of Radford, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 12, 2017, 4:02 PM EDT for Pulaski County, City of Radford, Virginia. It was in force for 58 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 12, 2017, 4:02 PM EDT (20:02 UTC)
Expired: Aug 12, 2017, 5:00 PM EDT
In force: 58 min
Issued by: NWS Blacksburg, VA

Counties City of Radford, VA, Pulaski County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.0 hours before the alert went out and 360 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: 248 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 11, 8:02 PM EDT	Special Weather Statement	RNK	Halifax	58 min
Aug 11, 8:06 PM EDT	Special Weather Statement	RNK	Pittsylvania	54 min
Aug 11, 9:05 PM EDT	Special Weather Statement	RNK	Halifax	55 min
Aug 12, 7:17 AM EDT	Special Weather Statement	RNK	City of Danville	58 min
Aug 12, 8:19 AM EDT	Special Weather Statement	RNK	Halifax, City of Danville	56 min
Aug 12, 9:16 AM EDT	Special Weather Statement	RNK	Halifax, City of Danville	59 min
Aug 12, 3:02 PM EDT	Special Weather Statement	RNK	Henry, Patrick	58 min
Aug 12, 6:56 PM EDT	Special Weather Statement	RNK	Patrick	64 min
Aug 12, 1:25 PM EDT	Special Weather Statement	RNK	Caswell	50 min

Nearby

Special Weather Statements in Virginia, 2017 Every special weather statement in 2017

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.